♻️ refactor(database/ssh): SSH隧道架构重构与多数据源适配

- 架构升级：从driver专属拨号器改为通用本地端口转发模式
  - 并发安全：sync.Once保护Close操作,RWMutex保护状态访问,双向errc等待
  - 连接池化：GetOrCreateLocalForwarder/GetOrCreateSSHClient实现缓存复用
  - SQL安全：kingbase_impl.go引入esc函数,防止双引号注入(""ldf_server""问题)
  - Schema动态化：三级fallback(schema.table解析→dbName参数→current_schema())
  - 代码复用：scanRows统一行扫描逻辑,normalizeQueryValueWithDBType增强类型处理
  Close #40

.github/ISSUE_TEMPLATE/01-bug_report.yml

@@ -0,0 +1,58 @@
+name: 问题反馈
+description: 软件问题反馈
+title: "[Bug] "
+labels: ["bug"]
+
+body:
+  - type: checkboxes
+    id: searched
+    attributes:
+      label: 已经搜索过 Issues，未发现重复问题*
+      options:
+        - label: 我已经搜索过 Issues，没有发现重复问题
+    validations:
+      required: true
+
+  - type: input
+    id: system
+    attributes:
+      label: 操作系统及版本
+      placeholder: Windows 10 22H2 / macOS Mojave / Linux
+    validations:
+      required: true
+
+  - type: input
+    id: version
+    attributes:
+      label: 软件安装版本
+      placeholder: v0.2.3
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: 问题简述及复现流程
+      description: 请详细描述你遇到的问题，并提供复现步骤
+      placeholder: |
+        1. 打开软件
+        2. 点击 xxx
+        3. 预期结果是 ...
+        4. 实际结果是 ...
+        5. 截图 ...
+    validations:
+      required: true
+
+  - type: textarea
+    id: extra
+    attributes:
+      label: 其他补充
+      description: 如果你有额外信息，请在此填写
+      placeholder: 可选
+
+  - type: checkboxes
+    id: pr
+    attributes:
+      label: 是否愿意提交 PR 修复当前 Issue
+      options:
+        - label: 我愿意尝试提交 PR

.github/ISSUE_TEMPLATE/02-feature_request.yml

@@ -0,0 +1,37 @@
+name: 功能建议
+description: 添加全新功能或改进现有功能
+title: "[Enhancement] "
+labels: ["enhancement"]
+
+body:
+  - type: checkboxes
+    id: searched
+    attributes:
+      label: 已经搜索过 Issues，未发现重复问题*
+      options:
+        - label: 我已经搜索过 Issues，没有发现重复问题
+    validations:
+      required: true
+
+  - type: textarea
+    id: feature
+    attributes:
+      label: 功能描述
+      description: 请详细描述你希望添加或改进的功能
+      placeholder: 请描述你想要的功能
+    validations:
+      required: true
+
+  - type: textarea
+    id: extra
+    attributes:
+      label: 其他补充
+      description: 如果你有额外信息，请在此填写
+      placeholder: 可选
+
+  - type: checkboxes
+    id: pr
+    attributes:
+      label: 是否愿意提交 PR 实现当前 Issue
+      options:
+        - label: 我愿意尝试提交 PR

.github/ISSUE_TEMPLATE/03-generic.yml

@@ -0,0 +1,30 @@
+name: 其他反馈
+description: 其他类型反馈、建议或讨论
+title: "[Question] "
+labels: ["question"]
+
+body:
+  - type: checkboxes
+    id: searched
+    attributes:
+      label: 已经搜索过 Issues，未发现重复问题*
+      options:
+        - label: 我已经搜索过 Issues，没有发现重复问题
+    validations:
+      required: true
+
+  - type: textarea
+    id: content
+    attributes:
+      label: 内容
+      description: 请填写你的反馈、建议或讨论内容
+      placeholder: 请描述你的问题或想法
+    validations:
+      required: true
+
+  - type: textarea
+    id: extra
+    attributes:
+      label: 其他补充
+      description: 如果你有额外信息，请在此填写
+      placeholder: 可选

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/workflows/release.yml

@@ -9,7 +9,8 @@ permissions:
   contents: write
 
 jobs:
-  build-and-release:
+  # Phase 1: Build in parallel and output artifacts
+  build:
     name: Build ${{ matrix.platform }}
     runs-on: ${{ matrix.os }}
     strategy:
@@ -19,12 +20,15 @@ jobs:
           - os: macos-latest
             platform: darwin/amd64
             artifact_name: GoNavi-mac-amd64
+            asset_ext: .dmg
           - os: macos-latest
             platform: darwin/arm64
             artifact_name: GoNavi-mac-arm64
+            asset_ext: .dmg
           - os: windows-latest
             platform: windows/amd64
             artifact_name: GoNavi-windows-amd64
+            asset_ext: .exe
 
     steps:
       - name: Checkout code
@@ -49,36 +53,26 @@ jobs:
         run: |
           wails build -platform ${{ matrix.platform }} -clean -o ${{ matrix.artifact_name }}
 
-      - name: Package macOS Application
+      # macOS Packaging
+      - name: Package macOS DMG
         if: contains(matrix.platform, 'darwin')
         run: |
-          # Install create-dmg
           brew install create-dmg
-
           cd build/bin
-          echo "📂 列出 build/bin 目录内容:"
-          ls -F
           
-          # Find .app bundle
           APP_PATH=$(find . -maxdepth 1 -name "*.app" | head -n 1)
-          
           if [ -z "$APP_PATH" ]; then
             echo "❌ 未找到 .app 应用包!"
             exit 1
           fi
-          
-          # Get pure name (e.g. GoNavi.app)
           APP_NAME=$(basename "$APP_PATH")
           
-          # Ad-hoc codesign to prevent "Damaged" error (requires user to allow anyway, but valid structure)
           echo "🔏 正在进行 Ad-hoc 签名..."
           codesign --force --options runtime --deep --sign - "$APP_NAME"
           
           DMG_NAME="${{ matrix.artifact_name }}.dmg"
-          
           echo "📦 正在生成 DMG: $DMG_NAME..."
           
-          # Create DMG
           create-dmg \
             --volname "GoNavi Installer" \
             --window-pos 200 120 \
@@ -90,24 +84,19 @@ jobs:
             "$DMG_NAME" \
             "$APP_NAME"
             
-          # Move DMG to root for upload
-          mv "$DMG_NAME" "../../$DMG_NAME"
+          mv "$DMG_NAME" ../../
 
-      - name: Package Windows Executable
+      # Windows Packaging
+      - name: Prepare Windows Exe
         if: contains(matrix.platform, 'windows')
         shell: bash
         run: |
           cd build/bin
-          echo "📂 列出 build/bin 目录内容:"
-          ls -F
-          
           TARGET="${{ matrix.artifact_name }}"
           
           if [ -f "$TARGET.exe" ]; then
-              echo "✅ 找到 $TARGET.exe"
               FINAL_EXE="$TARGET.exe"
           elif [ -f "$TARGET" ]; then
-              echo "⚠️ 找到无后缀文件 $TARGET，正在添加 .exe 后缀..."
               mv "$TARGET" "$TARGET.exe"
               FINAL_EXE="$TARGET.exe"
           else
@@ -116,14 +105,38 @@ jobs:
           fi
           
           echo "📦 正在移动 $FINAL_EXE 到根目录..."
-          mv "$FINAL_EXE" "../../${{ matrix.artifact_name }}.exe"
+          mv "$FINAL_EXE" "../../$FINAL_EXE"
 
-      - name: Upload Release Asset
+      # Upload to Actions Artifacts (Temporary Storage)
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-artifacts-${{ strategy.job-index }} # Unique name per job
+          path: GoNavi-*${{ matrix.asset_ext }}
+          retention-days: 1
+
+  # Phase 2: Collect all artifacts and Publish Release (Single Job)
+  release:
+    name: Publish Release
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download All Artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: release-assets
+          pattern: build-artifacts-*
+          merge-multiple: true
+
+      - name: List Assets
+        run: ls -R release-assets
+
+      - name: Create Release
         uses: softprops/action-gh-release@v2
         if: startsWith(github.ref, 'refs/tags/')
         with:
-          files: |
-            ${{ matrix.artifact_name }}.dmg
-            ${{ matrix.artifact_name }}.exe
+          files: release-assets/*
+          draft: true
+          make_latest: true
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -14,4 +14,6 @@ node_modules/
 dist/
 .DS_Store
 .gemini-clipboard
-GoNavi-Wails
+GoNavi-Wails
+GoNavi-Wails.exe
+.ace-tool/

README.md

@@ -1,21 +1,27 @@
 # GoNavi - 现代化的轻量级数据库管理工具
-<img width="1200" height="1116" alt="image" src="https://github.com/user-attachments/assets/d15fa9e9-5486-423b-a0e9-53b467e45432" />
-<img width="4096" height="2180" alt="image" src="https://github.com/user-attachments/assets/330ce49b-45f1-4919-ae14-75f7d47e5f73" />
-<img width="4096" height="2304" alt="image" src="https://github.com/user-attachments/assets/341cda98-79a5-4198-90f3-1335131ccde0" />
-<img width="4096" height="2304" alt="image" src="https://github.com/user-attachments/assets/ec522145-5ceb-4481-ae46-a9251c89bdfc" />
-<img width="4096" height="2304" alt="image" src="https://github.com/user-attachments/assets/224a74e7-65df-4aef-9710-d8e82e3a70c1" />
-<img width="4096" height="2180" alt="image" src="https://github.com/user-attachments/assets/f0c57590-d987-4ecf-89b2-64efad60b6d7" />
 
-[![Go Version](https://img.shields.io/github/go-mod/go-version/yangguofeng/GoNavi)](https://go.dev/)
+[![Go Version](https://img.shields.io/github/go-mod/go-version/Syngnat/GoNavi)](https://go.dev/)
 [![Wails Version](https://img.shields.io/badge/Wails-v2-red)](https://wails.io)
 [![React Version](https://img.shields.io/badge/React-v18-blue)](https://reactjs.org/)
 [![License](https://img.shields.io/badge/License-Apache%202.0-green.svg)](LICENSE)
-[![Build Status](https://img.shields.io/github/actions/workflow/status/yangguofeng/GoNavi/release.yml?label=Build)](https://github.com/yangguofeng/GoNavi/actions)
+[![Build Status](https://img.shields.io/github/actions/workflow/status/Syngnat/GoNavi/release.yml?label=Build)](https://github.com/Syngnat/GoNavi/actions)
 
 **GoNavi** 是一款基于 **Wails (Go)** 和 **React** 构建的现代化、高性能、跨平台数据库管理客户端。它旨在提供如原生应用般流畅的用户体验，同时保持极低的资源占用。
 
 相比于 Electron 应用，GoNavi 的体积更小（~10MB），启动速度更快，内存占用更低。
 
+<h2 align="center">📸 项目截图</h2>
+
+<div align="center">
+    <img width="25%" alt="image" src="https://github.com/user-attachments/assets/341cda98-79a5-4198-90f3-1335131ccde0" />
+    <img width="25%" alt="image" src="https://github.com/user-attachments/assets/224a74e7-65df-4aef-9710-d8e82e3a70c1" />
+    <img width="25%" alt="image" src="https://github.com/user-attachments/assets/ec522145-5ceb-4481-ae46-a9251c89bdfc" />
+    <br />
+    <img width="25%" alt="image" src="https://github.com/user-attachments/assets/330ce49b-45f1-4919-ae14-75f7d47e5f73" />
+    <img width="14%" alt="image" src="https://github.com/user-attachments/assets/d15fa9e9-5486-423b-a0e9-53b467e45432" />
+    <img width="25%" alt="image" src="https://github.com/user-attachments/assets/f0c57590-d987-4ecf-89b2-64efad60b6d7" />
+</div>
+
 ---
 
 ## ✨ 核心特性

frontend/package-lock.json

@@ -27,6 +27,7 @@
         "@types/react": "^18.2.43",
         "@types/react-dom": "^18.2.17",
         "@types/react-resizable": "^3.0.8",
+        "@types/uuid": "^9.0.7",
         "@vitejs/plugin-react": "^4.2.1",
         "typescript": "^5.2.2",
         "vite": "^5.0.8"
@@ -1565,6 +1566,13 @@
       "optional": true,
       "peer": true
     },
+    "node_modules/@types/uuid": {
+      "version": "9.0.8",
+      "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-9.0.8.tgz",
+      "integrity": "sha512-jg+97EGIcY9AGHJJRaaPVgetKDsrTgbRjQ5Msgjh/DQKEFl0DtyRr/VCOyD1T2R1MNeWPK/u7JoGhlDZnKBAfA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@vitejs/plugin-react": {
       "version": "4.7.0",
       "resolved": "https://registry.npmjs.org/@vitejs/plugin-react/-/plugin-react-4.7.0.tgz",

frontend/package.json

@@ -28,6 +28,7 @@
     "@types/react": "^18.2.43",
     "@types/react-dom": "^18.2.17",
     "@types/react-resizable": "^3.0.8",
+    "@types/uuid": "^9.0.7",
     "@vitejs/plugin-react": "^4.2.1",
     "typescript": "^5.2.2",
     "vite": "^5.0.8"

frontend/package.json.md5

@@ -1 +1 @@
-c1af19c07654ec9f98628c358ae49b1a
+5b8157374dae5f9340e31b2d0bd2c00e

frontend/src/App.tsx

@@ -1,9 +1,11 @@
 import React, { useState, useEffect } from 'react';
 import { Layout, Button, ConfigProvider, theme, Dropdown, MenuProps, message } from 'antd';
+import zhCN from 'antd/locale/zh_CN';
 import { PlusOutlined, BulbOutlined, BulbFilled, ConsoleSqlOutlined, BugOutlined, SettingOutlined, UploadOutlined, DownloadOutlined } from '@ant-design/icons';
 import Sidebar from './components/Sidebar';
 import TabManager from './components/TabManager';
 import ConnectionModal from './components/ConnectionModal';
+import DataSyncModal from './components/DataSyncModal';
 import LogPanel from './components/LogPanel';
 import { useStore } from './store';
 import { SavedConnection } from './types';
@@ -13,6 +15,7 @@ const { Sider, Content } = Layout;
 
 function App() {
   const [isModalOpen, setIsModalOpen] = useState(false);
+  const [isSyncModalOpen, setIsSyncModalOpen] = useState(false);
   const [editingConnection, setEditingConnection] = useState<SavedConnection | null>(null);
   const { darkMode, toggleDarkMode, addTab, activeContext, connections, addConnection, tabs, activeTabId } = useStore();
 
@@ -77,6 +80,12 @@ function App() {
   };
 
   const settingsMenu: MenuProps['items'] = [
+      {
+          key: 'sync',
+          label: '数据同步',
+          icon: <UploadOutlined rotate={90} />,
+          onClick: () => setIsSyncModalOpen(true)
+      },
       {
           key: 'import',
           label: '导入连接配置',
@@ -216,6 +225,7 @@ function App() {
 
   return (
     <ConfigProvider
+        locale={zhCN}
         theme={{
             algorithm: darkMode ? theme.darkAlgorithm : theme.defaultAlgorithm,
         }}
@@ -275,12 +285,12 @@ function App() {
                 title="拖动调整宽度"
             />
           </Sider>
-          <Content style={{ background: darkMode ? '#141414' : '#fff', overflow: 'hidden', display: 'flex', flexDirection: 'column' }}>
-            <div style={{ flex: 1, overflow: 'hidden' }}>
-                <TabManager />
-            </div>
-            {isLogPanelOpen && (
-                <LogPanel 
+           <Content style={{ background: darkMode ? '#141414' : '#fff', overflow: 'hidden', display: 'flex', flexDirection: 'column' }}>
+             <div style={{ flex: 1, minHeight: 0, overflow: 'hidden', display: 'flex', flexDirection: 'column' }}>
+                 <TabManager />
+             </div>
+             {isLogPanelOpen && (
+                 <LogPanel 
                     height={logPanelHeight} 
                     onClose={() => setIsLogPanelOpen(false)} 
                     onResizeStart={handleLogResizeStart} 
@@ -292,6 +302,10 @@ function App() {
             onClose={handleCloseModal} 
             initialValues={editingConnection}
           />
+          <DataSyncModal
+            open={isSyncModalOpen}
+            onClose={() => setIsSyncModalOpen(false)}
+          />
           
           {/* Ghost Resize Line for Sidebar */}
           <div 
@@ -329,4 +343,4 @@ function App() {
   );
 }
 
-export default App;
+export default App;

frontend/src/components/ConnectionModal.tsx

@@ -1,14 +1,19 @@
 import React, { useState, useEffect } from 'react';
-import { Modal, Form, Input, InputNumber, Button, message, Checkbox, Divider, Collapse, Select, Alert } from 'antd';
+import { Modal, Form, Input, InputNumber, Button, message, Checkbox, Divider, Select, Alert, Card, Row, Col, Typography, Collapse } from 'antd';
+import { DatabaseOutlined, ConsoleSqlOutlined, FileTextOutlined, CloudServerOutlined, AppstoreAddOutlined } from '@ant-design/icons';
 import { useStore } from '../store';
-import { MySQLConnect, MySQLGetDatabases } from '../../wailsjs/go/app/App';
+import { DBConnect, DBGetDatabases, TestConnection } from '../../wailsjs/go/app/App';
 import { SavedConnection } from '../types';
 
+const { Meta } = Card;
+const { Text } = Typography;
+
 const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialValues?: SavedConnection | null }> = ({ open, onClose, initialValues }) => {
   const [form] = Form.useForm();
   const [loading, setLoading] = useState(false);
   const [useSSH, setUseSSH] = useState(false);
   const [dbType, setDbType] = useState('mysql');
+  const [step, setStep] = useState(1); // 1: Select Type, 2: Configure
   const [testResult, setTestResult] = useState<{ type: 'success' | 'error', message: string } | null>(null);
   const [dbList, setDbList] = useState<string[]>([]);
   const addConnection = useStore((state) => state.addConnection);
@@ -19,6 +24,8 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
           setTestResult(null); // Reset test result
           setDbList([]);
           if (initialValues) {
+              // Edit mode: Go directly to step 2
+              setStep(2);
               form.setFieldsValue({
                   type: initialValues.config.type,
                   name: initialValues.name,
@@ -34,10 +41,15 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
                   sshUser: initialValues.config.ssh?.user,
                   sshPassword: initialValues.config.ssh?.password,
                   sshKeyPath: initialValues.config.ssh?.keyPath,
+                  driver: (initialValues.config as any).driver,
+                  dsn: (initialValues.config as any).dsn,
+                  timeout: (initialValues.config as any).timeout || 30
               });
               setUseSSH(initialValues.config.useSSH || false);
               setDbType(initialValues.config.type);
           } else {
+              // Create mode: Start at step 1
+              setStep(1);
               form.resetFields();
               setUseSSH(false);
               setDbType('mysql');
@@ -52,8 +64,7 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
       
       const config = await buildConfig(values);
       
-      // Use Connect to verify before saving
-      const res = await MySQLConnect(config as any);
+      const res = await DBConnect(config as any);
       setLoading(false);
       
       if (res.success) {
@@ -75,6 +86,7 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
         form.resetFields();
         setUseSSH(false);
         setDbType('mysql');
+        setStep(1);
         onClose();
       } else {
         message.error('连接失败: ' + res.message);
@@ -88,14 +100,13 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
       try {
           const values = await form.validateFields();
           setLoading(true);
-          setTestResult(null); // Clear previous result
+          setTestResult(null);
           const config = await buildConfig(values);
-          const res = await (window as any).go.app.App.TestConnection(config);
+          const res = await TestConnection(config as any);
           setLoading(false);
           if (res.success) {
               setTestResult({ type: 'success', message: res.message });
-              // Fetch DB List on success
-              const dbRes = await MySQLGetDatabases(config as any);
+              const dbRes = await DBGetDatabases(config as any);
               if (dbRes.success) {
                   const dbs = (dbRes.data as any[]).map((row: any) => row.Database || row.database);
                   setDbList(dbs);
@@ -119,58 +130,100 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
 
       return { 
           type: values.type,
-          host: values.host,
+          host: values.host || "",
           port: Number(values.port || 0),
           user: values.user || "",
           password: values.password || "",
           database: values.database || "",
           useSSH: !!values.useSSH,
-          ssh: sshConfig
+          ssh: sshConfig,
+          driver: values.driver,
+          dsn: values.dsn,
+          timeout: Number(values.timeout || 30)
       };
   };
 
-  const isSqlite = dbType === 'sqlite';
+  const handleTypeSelect = (type: string) => {
+      setDbType(type);
+      form.setFieldsValue({ type: type });
+      
+      // Auto-fill default port
+      let defaultPort = 3306;
+      switch (type) {
+          case 'mysql': defaultPort = 3306; break;
+          case 'postgres': defaultPort = 5432; break;
+          case 'oracle': defaultPort = 1521; break;
+          case 'dameng': defaultPort = 5236; break;
+          case 'kingbase': defaultPort = 54321; break;
+          default: defaultPort = 3306;
+      }
+      if (type !== 'sqlite' && type !== 'custom') {
+          form.setFieldsValue({ port: defaultPort });
+      }
 
-  return (
-    <Modal 
-        title={initialValues ? "编辑连接" : "新建连接"}
-        open={open} 
-        onCancel={onClose} 
-        onOk={handleOk} 
-        confirmLoading={loading} 
-        footer={[
-            <Button key="test" loading={loading} onClick={handleTest}>测试连接</Button>,
-            <Button key="cancel" onClick={onClose}>取消</Button>,
-            <Button key="submit" type="primary" loading={loading} onClick={handleOk}>保存</Button>
-        ]}
-        width={600}
-        zIndex={10001} // Increase z-index
-        destroyOnHidden // Reset on close
-        maskClosable={false} // Prevent accidental close by clicking mask, user must click X or Cancel
-    >
+      setStep(2);
+  };
+
+  const isSqlite = dbType === 'sqlite';
+  const isCustom = dbType === 'custom';
+
+  const dbTypes = [
+      { key: 'mysql', name: 'MySQL', icon: <ConsoleSqlOutlined style={{ fontSize: 24, color: '#00758F' }} /> },
+      { key: 'postgres', name: 'PostgreSQL', icon: <DatabaseOutlined style={{ fontSize: 24, color: '#336791' }} /> },
+      { key: 'sqlite', name: 'SQLite', icon: <FileTextOutlined style={{ fontSize: 24, color: '#003B57' }} /> },
+      { key: 'oracle', name: 'Oracle', icon: <DatabaseOutlined style={{ fontSize: 24, color: '#F80000' }} /> },
+      { key: 'dameng', name: 'Dameng (达梦)', icon: <CloudServerOutlined style={{ fontSize: 24, color: '#1890ff' }} /> },
+      { key: 'kingbase', name: 'Kingbase (人大金仓)', icon: <DatabaseOutlined style={{ fontSize: 24, color: '#faad14' }} /> },
+      { key: 'custom', name: 'Custom (自定义)', icon: <AppstoreAddOutlined style={{ fontSize: 24, color: '#595959' }} /> },
+  ];
+
+  const renderStep1 = () => (
+      <Row gutter={[16, 16]}>
+          {dbTypes.map(item => (
+              <Col span={8} key={item.key}>
+                  <Card 
+                      hoverable 
+                      onClick={() => handleTypeSelect(item.key)}
+                      style={{ textAlign: 'center', cursor: 'pointer' }}
+                  >
+                      <div style={{ marginBottom: 12 }}>{item.icon}</div>
+                      <Text strong>{item.name}</Text>
+                  </Card>
+              </Col>
+          ))}
+      </Row>
+  );
+
+  const renderStep2 = () => (
       <Form 
         form={form} 
         layout="vertical" 
-        initialValues={{ type: 'mysql', host: 'localhost', port: 3306, user: 'root', useSSH: false, sshPort: 22 }}
+        initialValues={{ type: 'mysql', host: 'localhost', port: 3306, user: 'root', useSSH: false, sshPort: 22, timeout: 30 }}
         onValuesChange={(changed) => {
             if (testResult) setTestResult(null); // Clear result on change
             if (changed.useSSH !== undefined) setUseSSH(changed.useSSH);
+            // Type change handled by step 1, but keep sync if select changes (hidden now)
             if (changed.type !== undefined) setDbType(changed.type);
         }}
       >
-        <div style={{ display: 'flex', gap: 16 }}>
-            <Form.Item name="type" label="数据库类型" style={{ width: 120 }}>
-                <Select>
-                    <Select.Option value="mysql">MySQL</Select.Option>
-                    <Select.Option value="postgres">PostgreSQL</Select.Option>
-                    <Select.Option value="sqlite">SQLite</Select.Option>
-                </Select>
-            </Form.Item>
-            <Form.Item name="name" label="连接名称" style={{ flex: 1 }}>
-              <Input placeholder="例如：本地测试库" />
-            </Form.Item>
-        </div>
+        {/* Hidden Type Field to keep form value synced */}
+        <Form.Item name="type" hidden><Input /></Form.Item>
+
+        <Form.Item name="name" label="连接名称">
+            <Input placeholder="例如：本地测试库" />
+        </Form.Item>
         
+        {isCustom ? (
+            <>
+                <Form.Item name="driver" label="驱动名称 (Driver Name)" rules={[{ required: true, message: '请输入驱动名称' }]} help="已支持: mysql, postgres, sqlite, oracle, dm, kingbase">
+                    <Input placeholder="例如: mysql, postgres" />
+                </Form.Item>
+                <Form.Item name="dsn" label="连接字符串 (DSN)" rules={[{ required: true, message: '请输入连接字符串' }]}>
+                    <Input.TextArea rows={3} placeholder="例如: user:pass@tcp(localhost:3306)/dbname?charset=utf8" />
+                </Form.Item>
+            </>
+        ) : (
+        <>
         <div style={{ display: 'flex', gap: 16 }}>
             <Form.Item name="host" label={isSqlite ? "文件路径 (绝对路径)" : "主机地址 (Host)"} rules={[{ required: true, message: '请输入地址/路径' }]} style={{ flex: 1 }}>
               <Input placeholder={isSqlite ? "/path/to/db.sqlite" : "localhost"} />
@@ -211,8 +264,8 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
             {useSSH && (
                 <div style={{ padding: '12px', background: '#f5f5f5', borderRadius: 6, marginTop: 12 }}>
                     <div style={{ display: 'flex', gap: 16 }}>
-                        <Form.Item name="sshHost" label="SSH 主机" rules={[{ required: useSSH, message: '请输入SSH主机' }]} style={{ flex: 1 }}>
-                            <Input placeholder="ssh.example.com" />
+                        <Form.Item name="sshHost" label="SSH 主机 (域名或IP)" rules={[{ required: useSSH, message: '请输入SSH主机' }]} style={{ flex: 1 }}>
+                            <Input placeholder="例如: ssh.example.com 或 192.168.1.100" />
                         </Form.Item>
                         <Form.Item name="sshPort" label="端口" rules={[{ required: useSSH, message: '请输入SSH端口' }]} style={{ width: 100 }}>
                             <InputNumber style={{ width: '100%' }} />
@@ -231,20 +284,76 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
                     </Form.Item>
                 </div>
             )}
+
+            <Divider style={{ margin: '12px 0' }} />
+            
+            <Collapse 
+                ghost 
+                items={[{
+                    key: 'advanced',
+                    label: '高级连接',
+                    children: (
+                        <Form.Item 
+                            name="timeout" 
+                            label="连接超时 (秒)" 
+                            help="数据库连接超时时间，默认 30 秒"
+                            rules={[{ type: 'number', min: 1, max: 300, message: '超时时间范围: 1-300 秒' }]}
+                        >
+                            <InputNumber style={{ width: '100%' }} min={1} max={300} placeholder="30" />
+                        </Form.Item>
+                    )
+                }]}
+            />
         </>
         )}
-      </Form>
-      
-      {testResult && (
+        </>
+        )}
+        
+        {testResult && (
           <Alert
               message={testResult.message}
               type={testResult.type}
               showIcon
               style={{ marginTop: 16 }}
           />
-      )}
+        )}
+      </Form>
+  );
+
+  const getFooter = () => {
+      if (step === 1) {
+          return [
+             <Button key="cancel" onClick={onClose}>取消</Button>
+          ];
+      }
+      return [
+          !initialValues && <Button key="back" onClick={() => setStep(1)} style={{ float: 'left' }}>上一步</Button>,
+          <Button key="test" loading={loading} onClick={handleTest}>测试连接</Button>,
+          <Button key="cancel" onClick={onClose}>取消</Button>,
+          <Button key="submit" type="primary" loading={loading} onClick={handleOk}>保存</Button>
+      ];
+  };
+
+  const getTitle = () => {
+      if (step === 1) return "选择数据源类型";
+      const typeName = dbTypes.find(t => t.key === dbType)?.name || dbType;
+      return initialValues ? "编辑连接" : `新建 ${typeName} 连接`;
+  };
+
+  return (
+    <Modal 
+        title={getTitle()}
+        open={open} 
+        onCancel={onClose} 
+        footer={getFooter()}
+        width={step === 1 ? 700 : 600}
+        zIndex={10001} 
+        destroyOnHidden 
+        maskClosable={false}
+    >
+      {step === 1 ? renderStep1() : renderStep2()}
     </Modal>
   );
 };
 
-export default ConnectionModal;
+export default ConnectionModal;

frontend/src/components/DataSyncModal.tsx

@@ -0,0 +1,807 @@
+import React, { useState, useEffect, useRef } from 'react';
+import { Modal, Form, Select, Button, message, Steps, Transfer, Card, Alert, Divider, Typography, Progress, Checkbox, Table, Drawer, Tabs } from 'antd';
+import { useStore } from '../store';
+import { DBGetDatabases, DBGetTables, DataSync, DataSyncAnalyze, DataSyncPreview } from '../../wailsjs/go/app/App';
+import { SavedConnection } from '../types';
+import { EventsOn } from '../../wailsjs/runtime/runtime';
+
+const { Title, Text } = Typography;
+const { Step } = Steps;
+const { Option } = Select;
+
+type SyncLogEvent = { jobId: string; level?: string; message?: string; ts?: number };
+type SyncProgressEvent = { jobId: string; percent?: number; current?: number; total?: number; table?: string; stage?: string };
+type SyncLogItem = { level: string; message: string; ts?: number };
+type TableDiffSummary = {
+  table: string;
+  pkColumn?: string;
+  canSync?: boolean;
+  inserts?: number;
+  updates?: number;
+  deletes?: number;
+  same?: number;
+  message?: string;
+};
+type TableOps = {
+  insert: boolean;
+  update: boolean;
+  delete: boolean;
+  selectedInsertPks?: string[];
+  selectedUpdatePks?: string[];
+  selectedDeletePks?: string[];
+};
+
+const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open, onClose }) => {
+  const connections = useStore((state) => state.connections);
+  const [currentStep, setCurrentStep] = useState(0);
+  const [loading, setLoading] = useState(false);
+  
+  // Step 1: Config
+  const [sourceConnId, setSourceConnId] = useState<string>('');
+  const [targetConnId, setTargetConnId] = useState<string>('');
+  const [sourceDb, setSourceDb] = useState<string>('');
+  const [targetDb, setTargetDb] = useState<string>('');
+  
+  const [sourceDbs, setSourceDbs] = useState<string[]>([]);
+  const [targetDbs, setTargetDbs] = useState<string[]>([]);
+
+  // Step 2: Tables
+  const [allTables, setAllTables] = useState<string[]>([]);
+  const [selectedTables, setSelectedTables] = useState<string[]>([]);
+
+  // Options
+  const [syncContent, setSyncContent] = useState<'data' | 'schema' | 'both'>('data');
+  const [syncMode, setSyncMode] = useState<string>('insert_update');
+  const [autoAddColumns, setAutoAddColumns] = useState<boolean>(true);
+  const [showSameTables, setShowSameTables] = useState<boolean>(false);
+  const [analyzing, setAnalyzing] = useState<boolean>(false);
+  const [diffTables, setDiffTables] = useState<TableDiffSummary[]>([]);
+  const [tableOptions, setTableOptions] = useState<Record<string, TableOps>>({});
+
+  const [previewOpen, setPreviewOpen] = useState(false);
+  const [previewTable, setPreviewTable] = useState<string>('');
+  const [previewLoading, setPreviewLoading] = useState(false);
+  const [previewData, setPreviewData] = useState<any>(null);
+
+  // Step 3: Result
+  const [syncResult, setSyncResult] = useState<any>(null);
+  const [syncing, setSyncing] = useState(false);
+  const [syncLogs, setSyncLogs] = useState<SyncLogItem[]>([]);
+  const [syncProgress, setSyncProgress] = useState<{ percent: number; current: number; total: number; table: string; stage: string }>({
+      percent: 0,
+      current: 0,
+      total: 0,
+      table: '',
+      stage: ''
+  });
+  const jobIdRef = useRef<string>('');
+  const logBoxRef = useRef<HTMLDivElement>(null);
+  const autoScrollRef = useRef(true);
+
+  const normalizeConnConfig = (conn: SavedConnection, database?: string) => ({
+      ...conn.config,
+      port: Number((conn.config as any).port),
+      password: conn.config.password || "",
+      useSSH: conn.config.useSSH || false,
+      ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" },
+      database: typeof database === 'string' ? database : (conn.config.database || ""),
+  });
+
+  useEffect(() => {
+      if (!open) return;
+
+      const offLog = EventsOn('sync:log', (event: SyncLogEvent) => {
+          if (!event || event.jobId !== jobIdRef.current) return;
+          const msg = String(event.message || '').trim();
+          if (!msg) return;
+          setSyncLogs(prev => [...prev, { level: String(event.level || 'info'), message: msg, ts: event.ts }]);
+      });
+
+      const offProgress = EventsOn('sync:progress', (event: SyncProgressEvent) => {
+          if (!event || event.jobId !== jobIdRef.current) return;
+          setSyncProgress(prev => ({
+              percent: typeof event.percent === 'number' ? event.percent : prev.percent,
+              current: typeof event.current === 'number' ? event.current : prev.current,
+              total: typeof event.total === 'number' ? event.total : prev.total,
+              table: typeof event.table === 'string' ? event.table : prev.table,
+              stage: typeof event.stage === 'string' ? event.stage : prev.stage,
+          }));
+      });
+
+      return () => {
+          offLog();
+          offProgress();
+      };
+  }, [open]);
+
+  useEffect(() => {
+      if (!logBoxRef.current) return;
+      if (!autoScrollRef.current) return;
+      logBoxRef.current.scrollTop = logBoxRef.current.scrollHeight;
+  }, [syncLogs]);
+
+  useEffect(() => {
+    if (open) {
+        setCurrentStep(0);
+        setSourceConnId('');
+        setTargetConnId('');
+        setSourceDb('');
+        setTargetDb('');
+        setSelectedTables([]);
+        setSyncContent('data');
+        setSyncMode('insert_update');
+        setAutoAddColumns(true);
+        setShowSameTables(false);
+        setAnalyzing(false);
+        setDiffTables([]);
+        setTableOptions({});
+        setPreviewOpen(false);
+        setPreviewTable('');
+        setPreviewLoading(false);
+        setPreviewData(null);
+        setSyncResult(null);
+        setSyncing(false);
+        setSyncLogs([]);
+        setSyncProgress({ percent: 0, current: 0, total: 0, table: '', stage: '' });
+        jobIdRef.current = '';
+        autoScrollRef.current = true;
+    }
+  }, [open]);
+
+  const handleSourceConnChange = async (connId: string) => {
+      setSourceConnId(connId);
+      setSourceDb('');
+      const conn = connections.find(c => c.id === connId);
+      if (conn) {
+          setLoading(true);
+          try {
+            const res = await DBGetDatabases(normalizeConnConfig(conn) as any);
+            if (res.success) {
+                setSourceDbs((res.data as any[]).map((r: any) => r.Database || r.database || r.username));
+            }
+          } catch(e) { message.error("Failed to fetch source databases"); }
+          setLoading(false);
+      }
+  };
+
+  const handleTargetConnChange = async (connId: string) => {
+      setTargetConnId(connId);
+      setTargetDb('');
+      const conn = connections.find(c => c.id === connId);
+      if (conn) {
+          setLoading(true);
+          try {
+            const res = await DBGetDatabases(normalizeConnConfig(conn) as any);
+            if (res.success) {
+                setTargetDbs((res.data as any[]).map((r: any) => r.Database || r.database || r.username));
+            }
+          } catch(e) { message.error("Failed to fetch target databases"); }
+          setLoading(false);
+      }
+  };
+
+  const nextToTables = async () => {
+      if (!sourceConnId || !targetConnId) return message.error("Select connections first");
+      if (!sourceDb) return message.error("Select source database");
+      if (!targetDb) return message.error("Select target database");
+
+      setLoading(true);
+      try {
+          const conn = connections.find(c => c.id === sourceConnId);
+          if (conn) {
+              const config = normalizeConnConfig(conn, sourceDb);
+              const res = await DBGetTables(config as any, sourceDb);
+              if (res.success) {
+                  // DBGetTables returns [{Table: "name"}, ...]
+                  const tables = (res.data as any[]).map((row: any) => row.Table || row.table || row.TABLE_NAME || Object.values(row)[0]);
+                  setAllTables(tables as string[]);
+                  setCurrentStep(1);
+              } else {
+                  message.error(res.message);
+              }
+          }
+      } catch (e) { message.error("Failed to fetch tables"); }
+      setLoading(false);
+  };
+
+  const updateTableOption = (table: string, key: keyof TableOps, value: any) => {
+      setTableOptions(prev => ({
+          ...prev,
+          [table]: { ...(prev[table] || { insert: true, update: true, delete: false }), [key]: value }
+      }));
+  };
+
+  const analyzeDiff = async () => {
+      if (selectedTables.length === 0) return;
+      if (!sourceConnId || !targetConnId) return message.error("Select connections first");
+      if (!sourceDb || !targetDb) return message.error("Select databases first");
+
+      setLoading(true);
+      setAnalyzing(true);
+      setDiffTables([]);
+      setTableOptions({});
+      setSyncLogs([]);
+
+      const sConn = connections.find(c => c.id === sourceConnId)!;
+      const tConn = connections.find(c => c.id === targetConnId)!;
+      const jobId = `analyze-${Date.now()}-${Math.random().toString(16).slice(2, 8)}`;
+      jobIdRef.current = jobId;
+      autoScrollRef.current = true;
+      setSyncProgress({ percent: 0, current: 0, total: selectedTables.length, table: '', stage: '差异分析' });
+
+      const config = {
+          sourceConfig: normalizeConnConfig(sConn, sourceDb),
+          targetConfig: normalizeConnConfig(tConn, targetDb),
+          tables: selectedTables,
+          content: syncContent,
+          mode: "insert_update",
+          autoAddColumns,
+          jobId,
+      };
+
+      try {
+          const res = await DataSyncAnalyze(config as any);
+          if (res.success) {
+              const tables = ((res.data as any)?.tables || []) as TableDiffSummary[];
+              setDiffTables(tables);
+              const init: Record<string, TableOps> = {};
+              tables.forEach(t => {
+                  const can = !!t.canSync;
+                  init[t.table] = {
+                      insert: can,
+                      update: can,
+                      delete: false,
+                      selectedInsertPks: [],
+                      selectedUpdatePks: [],
+                      selectedDeletePks: [],
+                  };
+              });
+              setTableOptions(init);
+              message.success("差异分析完成");
+          } else {
+              message.error(res.message || "差异分析失败");
+          }
+      } catch (e: any) {
+          message.error("差异分析失败: " + (e?.message || ""));
+      }
+
+      setLoading(false);
+      setAnalyzing(false);
+  };
+
+  const openPreview = async (table: string) => {
+      if (!table) return;
+      const sConn = connections.find(c => c.id === sourceConnId)!;
+      const tConn = connections.find(c => c.id === targetConnId)!;
+
+      setPreviewOpen(true);
+      setPreviewTable(table);
+      setPreviewLoading(true);
+      setPreviewData(null);
+
+      const config = {
+          sourceConfig: normalizeConnConfig(sConn, sourceDb),
+          targetConfig: normalizeConnConfig(tConn, targetDb),
+          tables: selectedTables,
+          content: "data",
+          mode: "insert_update",
+          autoAddColumns,
+      };
+
+      try {
+          const res = await DataSyncPreview(config as any, table, 200);
+          if (res.success) {
+              setPreviewData(res.data);
+          } else {
+              message.error(res.message || "加载差异预览失败");
+          }
+      } catch (e: any) {
+          message.error("加载差异预览失败: " + (e?.message || ""));
+      }
+
+      setPreviewLoading(false);
+  };
+
+  const runSync = async () => {
+      if (syncContent !== 'schema' && diffTables.length === 0) {
+          message.error("请先对比差异，再开始同步");
+          return;
+      }
+      if (syncContent !== 'schema' && syncMode === 'full_overwrite') {
+          const ok = await new Promise<boolean>((resolve) => {
+              Modal.confirm({
+                  title: '确认全量覆盖',
+                  content: '全量覆盖会清空目标表数据后再插入，请确认已备份目标库。',
+                  okText: '继续执行',
+                  cancelText: '取消',
+                  onOk: () => resolve(true),
+                  onCancel: () => resolve(false),
+              });
+          });
+          if (!ok) return;
+      }
+
+      setLoading(true);
+      setSyncing(true);
+      setCurrentStep(2);
+      setSyncResult(null);
+      setSyncLogs([]);
+
+      const sConn = connections.find(c => c.id === sourceConnId)!;
+      const tConn = connections.find(c => c.id === targetConnId)!;
+
+      const jobId = `sync-${Date.now()}-${Math.random().toString(16).slice(2, 8)}`;
+      jobIdRef.current = jobId;
+      autoScrollRef.current = true;
+      setSyncProgress({
+          percent: 0,
+          current: 0,
+          total: selectedTables.length,
+          table: '',
+          stage: '准备开始',
+      });
+      
+      const config = {
+          sourceConfig: {
+              ...sConn.config,
+              port: Number((sConn.config as any).port),
+              password: sConn.config.password || "",
+              useSSH: sConn.config.useSSH || false,
+              ssh: sConn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" },
+              database: sourceDb,
+          },
+          targetConfig: {
+              ...tConn.config,
+              port: Number((tConn.config as any).port),
+              password: tConn.config.password || "",
+              useSSH: tConn.config.useSSH || false,
+              ssh: tConn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" },
+              database: targetDb,
+          },
+          tables: selectedTables,
+          content: syncContent,
+          mode: syncMode,
+          autoAddColumns,
+          tableOptions,
+          jobId,
+      };
+
+      try {
+          const res = await DataSync(config as any);
+          setSyncResult(res);
+          if (Array.isArray(res?.logs) && res.logs.length > 0) {
+              setSyncLogs(prev => {
+                  if (prev.length > 0) return prev;
+                  return (res.logs as string[]).map((log) => {
+                      const msg = String(log || '').trim();
+                      if (msg.includes('致命错误') || msg.includes('失败')) return { level: 'error', message: msg };
+                      if (msg.includes('跳过') || msg.includes('警告')) return { level: 'warn', message: msg };
+                      return { level: 'info', message: msg };
+                  });
+              });
+          }
+      } catch (e) {
+          message.error("Sync execution failed");
+          setSyncResult({ success: false, message: "同步执行失败", logs: [] });
+      }
+      setLoading(false);
+      setSyncing(false);
+  };
+
+  const renderSyncLogItem = (item: SyncLogItem) => {
+      const level = String(item.level || 'info').toLowerCase();
+      const color = level === 'error' ? '#ff4d4f' : (level === 'warn' ? '#faad14' : '#595959');
+      const label = level === 'error' ? '错误' : (level === 'warn' ? '警告' : '信息');
+      const timeText = typeof item.ts === 'number' ? new Date(item.ts).toLocaleTimeString('zh-CN', { hour12: false }) : '';
+      return (
+          <div style={{ display: 'flex', gap: 8, alignItems: 'flex-start' }}>
+              <span style={{ color, flex: '0 0 auto' }}>● {label}</span>
+              {timeText && <span style={{ color: '#8c8c8c', flex: '0 0 auto' }}>{timeText}</span>}
+              <span style={{ whiteSpace: 'pre-wrap', wordBreak: 'break-word' }}>{item.message}</span>
+          </div>
+      );
+  };
+
+  return (
+    <>
+    <Modal
+        title="数据同步"
+        open={open}
+        onCancel={() => {
+            if (syncing) {
+                message.warning("同步执行中，暂不支持关闭");
+                return;
+            }
+            onClose();
+        }}
+        width={800}
+        footer={null}
+        destroyOnHidden
+        closable={!syncing}
+        maskClosable={!syncing}
+    >
+      <Steps current={currentStep} style={{ marginBottom: 24 }}>
+        <Step title="配置源与目标" />
+        <Step title="选择表" />
+        <Step title="执行结果" />
+      </Steps>
+
+      {/* STEP 1: CONFIG */}
+      {currentStep === 0 && (
+          <div>
+              <div style={{ display: 'flex', gap: 24, justifyContent: 'center' }}>
+                  <Card title="源数据库" style={{ width: 350 }}>
+                      <Form layout="vertical">
+                          <Form.Item label="连接">
+                              <Select value={sourceConnId} onChange={handleSourceConnChange}>
+                                  {connections.map(c => <Option key={c.id} value={c.id}>{c.name} ({c.config.type})</Option>)}
+                              </Select>
+                          </Form.Item>
+                          <Form.Item label="数据库">
+                              <Select value={sourceDb} onChange={setSourceDb} showSearch>
+                                  {sourceDbs.map(d => <Option key={d} value={d}>{d}</Option>)}
+                              </Select>
+                          </Form.Item>
+                      </Form>
+                  </Card>
+                  <div style={{ display: 'flex', alignItems: 'center' }}>至</div>
+                  <Card title="目标数据库" style={{ width: 350 }}>
+                      <Form layout="vertical">
+                          <Form.Item label="连接">
+                              <Select value={targetConnId} onChange={handleTargetConnChange}>
+                                  {connections.map(c => <Option key={c.id} value={c.id}>{c.name} ({c.config.type})</Option>)}
+                              </Select>
+                          </Form.Item>
+                          <Form.Item label="数据库">
+                              <Select value={targetDb} onChange={setTargetDb} showSearch>
+                                  {targetDbs.map(d => <Option key={d} value={d}>{d}</Option>)}
+                              </Select>
+                          </Form.Item>
+                      </Form>
+                  </Card>
+              </div>
+
+              <Card title="同步选项" style={{ marginTop: 16 }}>
+                  <Form layout="vertical">
+                      <Form.Item label="同步内容">
+                          <Select value={syncContent} onChange={setSyncContent}>
+                              <Option value="data">仅同步数据</Option>
+                              <Option value="schema">仅同步结构</Option>
+                              <Option value="both">同步结构 + 数据</Option>
+                          </Select>
+                      </Form.Item>
+                      <Form.Item label="同步模式">
+                          <Select value={syncMode} onChange={setSyncMode} disabled={syncContent === 'schema'}>
+                              <Option value="insert_update">增量同步（对比差异，按插入/更新/删除勾选执行）</Option>
+                              <Option value="insert_only">仅插入（不对比目标；无主键表将跳过）</Option>
+                              <Option value="full_overwrite">全量覆盖（清空目标表后插入）</Option>
+                          </Select>
+                      </Form.Item>
+                      <Form.Item>
+                          <Checkbox checked={autoAddColumns} onChange={(e) => setAutoAddColumns(e.target.checked)}>
+                              自动补齐目标表缺失字段（仅 MySQL 目标）
+                          </Checkbox>
+                      </Form.Item>
+                      {syncContent !== 'schema' && syncMode === 'full_overwrite' && (
+                          <Alert
+                              type="warning"
+                              showIcon
+                              message="全量覆盖会清空目标表数据，请谨慎使用。"
+                          />
+                      )}
+                  </Form>
+              </Card>
+          </div>
+      )}
+
+      {/* STEP 2: TABLES */}
+      {currentStep === 1 && (
+          <div style={{ display: 'flex', flexDirection: 'column', gap: 12 }}>
+              <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
+                  <Text type="secondary">请选择需要同步的表:</Text>
+                  <Checkbox checked={showSameTables} onChange={(e) => setShowSameTables(e.target.checked)}>
+                      显示相同表
+                  </Checkbox>
+              </div>
+              <Transfer
+                dataSource={allTables.map(t => ({ key: t, title: t }))}
+                titles={['源表', '已选表']}
+                targetKeys={selectedTables}
+                onChange={(keys) => setSelectedTables(keys as string[])}
+                render={item => item.title}
+                listStyle={{ width: 350, height: 280, marginTop: 0 }}
+                locale={{ itemUnit: '项', itemsUnit: '项', searchPlaceholder: '搜索表', notFoundContent: '暂无数据' }}
+              />
+
+              {diffTables.length > 0 && (
+                  <div>
+                      <Divider orientation="left">对比结果</Divider>
+                      <Table
+                          size="small"
+                          pagination={false}
+                          rowKey={(r: any) => r.table}
+                          dataSource={diffTables.filter(t => {
+                              const ins = Number(t.inserts || 0);
+                              const upd = Number(t.updates || 0);
+                              const del = Number(t.deletes || 0);
+                              const same = Number(t.same || 0);
+                              const msg = String(t.message || '').trim();
+                              const can = !!t.canSync;
+                              if (showSameTables) return true;
+                              if (!can) return true;
+                              if (msg) return true;
+                              return ins > 0 || upd > 0 || del > 0 || same === 0;
+                          })}
+                          columns={[
+                              { title: '表名', dataIndex: 'table', key: 'table', ellipsis: true },
+                              {
+                                  title: '插入',
+                                  key: 'inserts',
+                                  width: 90,
+                                  render: (_: any, r: any) => {
+                                      const ops = tableOptions[r.table] || { insert: true, update: true, delete: false };
+                                      const disabled = !r.canSync || analyzing || Number(r.inserts || 0) === 0;
+                                      return (
+                                          <Checkbox
+                                              checked={!!ops.insert}
+                                              disabled={disabled}
+                                              onChange={(e) => updateTableOption(r.table, 'insert', e.target.checked)}
+                                          >
+                                              {Number(r.inserts || 0)}
+                                          </Checkbox>
+                                      );
+                                  }
+                              },
+                              {
+                                  title: '更新',
+                                  key: 'updates',
+                                  width: 90,
+                                  render: (_: any, r: any) => {
+                                      const ops = tableOptions[r.table] || { insert: true, update: true, delete: false };
+                                      const disabled = !r.canSync || analyzing || Number(r.updates || 0) === 0;
+                                      return (
+                                          <Checkbox
+                                              checked={!!ops.update}
+                                              disabled={disabled}
+                                              onChange={(e) => updateTableOption(r.table, 'update', e.target.checked)}
+                                          >
+                                              {Number(r.updates || 0)}
+                                          </Checkbox>
+                                      );
+                                  }
+                              },
+                              {
+                                  title: '删除',
+                                  key: 'deletes',
+                                  width: 90,
+                                  render: (_: any, r: any) => {
+                                      const ops = tableOptions[r.table] || { insert: true, update: true, delete: false };
+                                      const disabled = !r.canSync || analyzing || Number(r.deletes || 0) === 0;
+                                      return (
+                                          <Checkbox
+                                              checked={!!ops.delete}
+                                              disabled={disabled}
+                                              onChange={(e) => updateTableOption(r.table, 'delete', e.target.checked)}
+                                          >
+                                              {Number(r.deletes || 0)}
+                                          </Checkbox>
+                                      );
+                                  }
+                              },
+                              { title: '相同', dataIndex: 'same', key: 'same', width: 70, render: (v: any) => Number(v || 0) },
+                              { title: '消息', dataIndex: 'message', key: 'message', ellipsis: true, render: (v: any) => (v ? String(v) : '') },
+                              {
+                                  title: '预览',
+                                  key: 'preview',
+                                  width: 80,
+                                  render: (_: any, r: any) => {
+                                      const can = !!r.canSync;
+                                      const hasDiff = Number(r.inserts || 0) + Number(r.updates || 0) + Number(r.deletes || 0) > 0;
+                                      return (
+                                          <Button size="small" disabled={!can || !hasDiff || analyzing} onClick={() => openPreview(r.table)}>
+                                              查看
+                                          </Button>
+                                      );
+                                  }
+                              }
+                          ]}
+                      />
+                  </div>
+              )}
+          </div>
+      )}
+
+      {/* STEP 3: RESULT */}
+      {currentStep === 2 && (
+          <div>
+              <Alert
+                  message={syncing ? "正在同步" : (syncResult?.success ? "同步完成" : "同步失败")}
+                  description={
+                      syncing
+                          ? `当前阶段：${syncProgress.stage || '执行中'}${syncProgress.table ? `，表：${syncProgress.table}` : ''}`
+                          : (syncResult?.message || `成功同步 ${syncResult?.tablesSynced || 0} 张表. 插入: ${syncResult?.rowsInserted || 0}, 更新: ${syncResult?.rowsUpdated || 0}`)
+                  }
+                  type={syncing ? "info" : (syncResult?.success ? "success" : "error")}
+                  showIcon
+              />
+
+              <div style={{ marginTop: 12 }}>
+                  <Progress
+                      percent={syncProgress.percent}
+                      status={syncing ? "active" : (syncResult?.success ? "success" : "exception")}
+                      format={() => `${syncProgress.current}/${syncProgress.total}`}
+                  />
+              </div>
+
+              <Divider orientation="left">日志</Divider>
+              <div
+                  ref={logBoxRef}
+                  onScroll={() => {
+                      const el = logBoxRef.current;
+                      if (!el) return;
+                      const nearBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 40;
+                      autoScrollRef.current = nearBottom;
+                  }}
+                  style={{ background: '#f5f5f5', padding: 12, height: 300, overflowY: 'auto', fontFamily: 'monospace' }}
+              >
+                  {syncLogs.map((item, i: number) => <div key={i}>{renderSyncLogItem(item)}</div>)}
+              </div>
+          </div>
+      )}
+
+      <div style={{ marginTop: 24, textAlign: 'right' }}>
+          {currentStep === 0 && (
+              <Button type="primary" onClick={nextToTables} loading={loading}>下一步</Button>
+          )}
+	          {currentStep === 1 && (
+	              <>
+	                <Button onClick={() => setCurrentStep(0)} style={{ marginRight: 8 }}>上一步</Button>
+	                <Button onClick={analyzeDiff} loading={loading} disabled={syncContent === 'schema' || selectedTables.length === 0 || analyzing} style={{ marginRight: 8 }}>
+	                    对比差异
+	                </Button>
+	                <Button
+	                    type="primary"
+	                    onClick={runSync}
+                    loading={loading}
+                    disabled={selectedTables.length === 0 || (syncContent !== 'schema' && diffTables.length === 0)}
+                >
+                    开始同步
+                </Button>
+              </>
+          )}
+          {currentStep === 2 && (
+              <>
+                  <Button disabled={syncing} onClick={() => setCurrentStep(1)} style={{ marginRight: 8 }}>继续同步</Button>
+                  <Button type="primary" disabled={syncing} onClick={onClose}>关闭</Button>
+              </>
+          )}
+      </div>
+    </Modal>
+    <Drawer
+        title={`差异预览：${previewTable}`}
+        open={previewOpen}
+        onClose={() => { setPreviewOpen(false); setPreviewTable(''); setPreviewData(null); }}
+        width={900}
+    >
+        {previewLoading && <Alert type="info" showIcon message="正在加载差异预览..." />}
+        {!previewLoading && previewData && (
+            <div>
+                <Alert
+                    type="info"
+                    showIcon
+                    message={`插入 ${previewData.totalInserts || 0}，更新 ${previewData.totalUpdates || 0}，删除 ${previewData.totalDeletes || 0}（预览最多展示 200 条/类型）`}
+                />
+                <Divider />
+                <Tabs
+                    items={[
+                        {
+                            key: 'insert',
+                            label: `插入(${previewData.totalInserts || 0})`,
+                            children: (
+                                <div>
+                                    <Text type="secondary">未勾选任何行表示“同步全部插入差异”；如不想执行插入请在对比结果中取消勾选“插入”。</Text>
+                                    <Table
+                                        size="small"
+                                        style={{ marginTop: 8 }}
+                                        rowKey={(r: any) => r.pk}
+                                        dataSource={(previewData.inserts || []).map((r: any) => ({ ...r, key: r.pk }))}
+                                        pagination={false}
+                                        rowSelection={{
+                                            selectedRowKeys: (tableOptions[previewTable]?.selectedInsertPks || []) as any,
+                                            onChange: (keys) => updateTableOption(previewTable, 'selectedInsertPks', keys as string[]),
+                                            getCheckboxProps: () => ({ disabled: !tableOptions[previewTable]?.insert }),
+                                        }}
+                                        columns={[
+                                            { title: previewData.pkColumn || '主键', dataIndex: 'pk', key: 'pk', width: 200, ellipsis: true },
+                                            { title: '数据', dataIndex: 'row', key: 'row', render: (v: any) => <pre style={{ margin: 0, maxHeight: 140, overflow: 'auto' }}>{JSON.stringify(v, null, 2)}</pre> }
+                                        ]}
+                                    />
+                                </div>
+                            )
+                        },
+                        {
+                            key: 'update',
+                            label: `更新(${previewData.totalUpdates || 0})`,
+                            children: (
+                                <div>
+                                    <Text type="secondary">未勾选任何行表示“同步全部更新差异”；如不想执行更新请在对比结果中取消勾选“更新”。</Text>
+                                    <Table
+                                        size="small"
+                                        style={{ marginTop: 8 }}
+                                        rowKey={(r: any) => r.pk}
+                                        dataSource={(previewData.updates || []).map((r: any) => ({ ...r, key: r.pk }))}
+                                        pagination={false}
+                                        rowSelection={{
+                                            selectedRowKeys: (tableOptions[previewTable]?.selectedUpdatePks || []) as any,
+                                            onChange: (keys) => updateTableOption(previewTable, 'selectedUpdatePks', keys as string[]),
+                                            getCheckboxProps: () => ({ disabled: !tableOptions[previewTable]?.update }),
+                                        }}
+                                        columns={[
+                                            { title: previewData.pkColumn || '主键', dataIndex: 'pk', key: 'pk', width: 200, ellipsis: true },
+                                            { title: '变更字段', dataIndex: 'changedColumns', key: 'changedColumns', render: (v: any) => Array.isArray(v) ? v.join(', ') : '' },
+                                            {
+                                                title: '详情',
+                                                key: 'detail',
+                                                width: 80,
+                                                render: (_: any, r: any) => (
+                                                    <Button size="small" onClick={() => {
+                                                        Modal.info({
+                                                            title: `更新详情：${previewTable} / ${r.pk}`,
+                                                            width: 900,
+                                                            content: (
+                                                                <div style={{ display: 'flex', gap: 12 }}>
+                                                                    <div style={{ flex: 1 }}>
+                                                                        <Title level={5}>源</Title>
+                                                                        <pre style={{ maxHeight: 360, overflow: 'auto', background: '#f5f5f5', padding: 8 }}>{JSON.stringify(r.source, null, 2)}</pre>
+                                                                    </div>
+                                                                    <div style={{ flex: 1 }}>
+                                                                        <Title level={5}>目标</Title>
+                                                                        <pre style={{ maxHeight: 360, overflow: 'auto', background: '#f5f5f5', padding: 8 }}>{JSON.stringify(r.target, null, 2)}</pre>
+                                                                    </div>
+                                                                </div>
+                                                            )
+                                                        });
+                                                    }}>查看</Button>
+                                                )
+                                            }
+                                        ]}
+                                    />
+                                </div>
+                            )
+                        },
+                        {
+                            key: 'delete',
+                            label: `删除(${previewData.totalDeletes || 0})`,
+                            children: (
+                                <div>
+                                    <Alert type="warning" showIcon message="删除默认不勾选。请确认业务允许后再开启删除操作。" />
+                                    <Text type="secondary">未勾选任何行表示“同步全部删除差异”；如不想执行删除请在对比结果中取消勾选“删除”。</Text>
+                                    <Table
+                                        size="small"
+                                        style={{ marginTop: 8 }}
+                                        rowKey={(r: any) => r.pk}
+                                        dataSource={(previewData.deletes || []).map((r: any) => ({ ...r, key: r.pk }))}
+                                        pagination={false}
+                                        rowSelection={{
+                                            selectedRowKeys: (tableOptions[previewTable]?.selectedDeletePks || []) as any,
+                                            onChange: (keys) => updateTableOption(previewTable, 'selectedDeletePks', keys as string[]),
+                                            getCheckboxProps: () => ({ disabled: !tableOptions[previewTable]?.delete }),
+                                        }}
+                                        columns={[
+                                            { title: previewData.pkColumn || '主键', dataIndex: 'pk', key: 'pk', width: 200, ellipsis: true },
+                                            { title: '数据', dataIndex: 'row', key: 'row', render: (v: any) => <pre style={{ margin: 0, maxHeight: 140, overflow: 'auto' }}>{JSON.stringify(v, null, 2)}</pre> }
+                                        ]}
+                                    />
+                                </div>
+                            )
+                        }
+                    ]}
+                />
+            </div>
+        )}
+    </Drawer>
+    </>
+  );
+};
+
+export default DataSyncModal;

frontend/src/components/DataViewer.tsx

@@ -1,9 +1,10 @@
-import React, { useEffect, useState, useCallback } from 'react';
+import React, { useEffect, useState, useCallback, useRef } from 'react';
 import { message } from 'antd';
 import { TabData, ColumnDefinition } from '../types';
 import { useStore } from '../store';
-import { MySQLQuery, DBGetColumns } from '../../wailsjs/go/app/App';
-import DataGrid from './DataGrid';
+import { DBQuery, DBGetColumns } from '../../wailsjs/go/app/App';
+import DataGrid, { GONAVI_ROW_KEY } from './DataGrid';
+import { buildWhereSQL, quoteIdentPart, quoteQualifiedIdent } from '../utils/sql';
 
 const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   const [data, setData] = useState<any[]>([]);
@@ -11,11 +12,17 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   const [pkColumns, setPkColumns] = useState<string[]>([]);
   const [loading, setLoading] = useState(false);
   const { connections, addSqlLog } = useStore();
+  const fetchSeqRef = useRef(0);
+  const countSeqRef = useRef(0);
+  const countKeyRef = useRef<string>('');
+  const pkSeqRef = useRef(0);
+  const pkKeyRef = useRef<string>('');
 
   const [pagination, setPagination] = useState({
       current: 1,
       pageSize: 100,
-      total: 0
+      total: 0,
+      totalKnown: false
   });
 
   const [sortInfo, setSortInfo] = useState<{ columnKey: string, order: string } | null>(null);
@@ -23,12 +30,20 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   const [showFilter, setShowFilter] = useState(false);
   const [filterConditions, setFilterConditions] = useState<any[]>([]);
 
+  useEffect(() => {
+    setPkColumns([]);
+    pkKeyRef.current = '';
+    countKeyRef.current = '';
+    setPagination(prev => ({ ...prev, current: 1, total: 0, totalKnown: false }));
+  }, [tab.connectionId, tab.dbName, tab.tableName]);
+
   const fetchData = useCallback(async (page = pagination.current, size = pagination.pageSize) => {
+    const seq = ++fetchSeqRef.current;
     setLoading(true);
     const conn = connections.find(c => c.id === tab.connectionId);
     if (!conn) {
         message.error("Connection not found");
-        setLoading(false);
+        if (fetchSeqRef.current === seq) setLoading(false);
         return;
     }
 
@@ -41,54 +56,31 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
         ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
     };
 
+    const dbType = config.type || '';
+
     const dbName = tab.dbName || '';
     const tableName = tab.tableName || '';
 
-    const whereParts: string[] = [];
-    filterConditions.forEach(cond => {
-        if (cond.column && cond.value) {
-            if (cond.op === 'LIKE') {
-                whereParts.push(`\`${cond.column}\` LIKE '%${cond.value}%'`);
-            } else {
-                whereParts.push(`\`${cond.column}\` ${cond.op} '${cond.value}'`);
-            }
-        }
-    });
-    const whereSQL = whereParts.length > 0 ? `WHERE ${whereParts.join(' AND ')}` : "";
+    const whereSQL = buildWhereSQL(dbType, filterConditions);
 
-    const countSql = `SELECT COUNT(*) as total FROM \`${tableName}\` ${whereSQL}`;
+    const countSql = `SELECT COUNT(*) as total FROM ${quoteQualifiedIdent(dbType, tableName)} ${whereSQL}`;
     
-    let sql = `SELECT * FROM \`${tableName}\` ${whereSQL}`;
+    let sql = `SELECT * FROM ${quoteQualifiedIdent(dbType, tableName)} ${whereSQL}`;
     if (sortInfo && sortInfo.order) {
-        sql += ` ORDER BY \`${sortInfo.columnKey}\` ${sortInfo.order === 'ascend' ? 'ASC' : 'DESC'}`;
+        sql += ` ORDER BY ${quoteIdentPart(dbType, sortInfo.columnKey)} ${sortInfo.order === 'ascend' ? 'ASC' : 'DESC'}`;
     }
     const offset = (page - 1) * size;
-    sql += ` LIMIT ${size} OFFSET ${offset}`;
+    // 大表性能：打开表不阻塞在 COUNT(*)，先通过多取 1 条判断是否还有下一页；总数在后台统计并异步回填。
+    sql += ` LIMIT ${size + 1} OFFSET ${offset}`;
 
     const startTime = Date.now();
     try {
-        const pCount = MySQLQuery(config as any, dbName, countSql);
-        const pData = MySQLQuery(config as any, dbName, sql);
-        
-        let pCols = null;
-        if (pkColumns.length === 0) {
-             pCols = DBGetColumns(config as any, dbName, tableName);
-        }
+        const pData = DBQuery(config as any, dbName, sql);
 
-        const [resCount, resData] = await Promise.all([pCount, pData]);
+        const resData = await pData;
         const duration = Date.now() - startTime;
         
         // Log Execution
-        addSqlLog({
-            id: `log-${Date.now()}-count`,
-            timestamp: Date.now(),
-            sql: countSql,
-            status: resCount.success ? 'success' : 'error',
-            duration: duration / 2, // Estimate
-            message: resCount.success ? '' : resCount.message,
-            dbName
-        });
-        
         addSqlLog({
             id: `log-${Date.now()}-data`,
             timestamp: Date.now(),
@@ -100,36 +92,101 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
             dbName
         });
         
-        if (pCols) {
-            const resCols = await pCols;
-            if (resCols.success) {
-                const pks = (resCols.data as ColumnDefinition[]).filter(c => c.key === 'PRI').map(c => c.name);
-                setPkColumns(pks);
+        if (pkColumns.length === 0) {
+            const pkKey = `${tab.connectionId}|${dbName}|${tableName}`;
+            if (pkKeyRef.current !== pkKey) {
+                pkKeyRef.current = pkKey;
+                const pkSeq = ++pkSeqRef.current;
+                DBGetColumns(config as any, dbName, tableName)
+                    .then((resCols: any) => {
+                        if (pkSeqRef.current !== pkSeq) return;
+                        if (pkKeyRef.current !== pkKey) return;
+                        if (!resCols?.success) return;
+                        const pks = (resCols.data as ColumnDefinition[]).filter((c: any) => c.key === 'PRI').map((c: any) => c.name);
+                        setPkColumns(pks);
+                    })
+                    .catch(() => {
+                        if (pkSeqRef.current !== pkSeq) return;
+                        if (pkKeyRef.current !== pkKey) return;
+                    });
             }
         }
 
-        let totalRecords = 0;
-        if (resCount.success && Array.isArray(resCount.data) && resCount.data.length > 0) {
-            totalRecords = Number(resCount.data[0]['total']);
-        }
-
         if (resData.success) {
             let resultData = resData.data as any[];
             if (!Array.isArray(resultData)) resultData = [];
 
+            const hasMore = resultData.length > size;
+            if (hasMore) resultData = resultData.slice(0, size);
+
             let fieldNames = resData.fields || [];
             if (fieldNames.length === 0 && resultData.length > 0) {
                 fieldNames = Object.keys(resultData[0]);
             }
+            if (fetchSeqRef.current !== seq) return;
             setColumnNames(fieldNames);
-            
-            setData(resultData.map((row: any, i: number) => ({ ...row, key: `row-${i}` }))); 
-            
-            setPagination(prev => ({ ...prev, current: page, pageSize: size, total: totalRecords }));
+            resultData.forEach((row: any, i: number) => {
+                if (row && typeof row === 'object') row[GONAVI_ROW_KEY] = `row-${offset + i}`;
+            });
+            setData(resultData);
+            const countKey = `${tab.connectionId}|${dbName}|${tableName}|${whereSQL}`;
+            const derivedTotalKnown = !hasMore;
+            const derivedTotal = derivedTotalKnown ? offset + resultData.length : page * size + 1;
+            if (derivedTotalKnown) countKeyRef.current = countKey;
+
+            setPagination(prev => {
+                if (derivedTotalKnown) {
+                    return { ...prev, current: page, pageSize: size, total: derivedTotal, totalKnown: true };
+                }
+                if (prev.totalKnown && countKeyRef.current === countKey) {
+                    return { ...prev, current: page, pageSize: size };
+                }
+                return { ...prev, current: page, pageSize: size, total: derivedTotal, totalKnown: false };
+            });
+
+            if (!derivedTotalKnown) {
+                if (countKeyRef.current !== countKey) {
+                    countKeyRef.current = countKey;
+                    const countSeq = ++countSeqRef.current;
+                    const countStart = Date.now();
+
+                    DBQuery(config as any, dbName, countSql)
+                        .then((resCount: any) => {
+                            const countDuration = Date.now() - countStart;
+
+                            addSqlLog({
+                                id: `log-${Date.now()}-count`,
+                                timestamp: Date.now(),
+                                sql: countSql,
+                                status: resCount.success ? 'success' : 'error',
+                                duration: countDuration,
+                                message: resCount.success ? '' : resCount.message,
+                                dbName
+                            });
+
+                            if (countSeqRef.current !== countSeq) return;
+                            if (countKeyRef.current !== countKey) return;
+
+                            if (!resCount.success) return;
+                            if (!Array.isArray(resCount.data) || resCount.data.length === 0) return;
+
+                            const total = Number(resCount.data[0]?.['total']);
+                            if (!Number.isFinite(total) || total < 0) return;
+
+                            setPagination(prev => ({ ...prev, total, totalKnown: true }));
+                        })
+                        .catch(() => {
+                            if (countSeqRef.current !== countSeq) return;
+                            if (countKeyRef.current !== countKey) return;
+                            // 统计失败不影响主流程，不弹窗；可在日志里查看。
+                        });
+                }
+            }
         } else {
             message.error(resData.message);
         }
     } catch (e: any) {
+        if (fetchSeqRef.current !== seq) return;
         message.error("Error fetching data: " + e.message);
         addSqlLog({
             id: `log-${Date.now()}-error`,
@@ -141,7 +198,7 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
             dbName
         });
     }
-    setLoading(false);
+    if (fetchSeqRef.current === seq) setLoading(false);
   }, [connections, tab, sortInfo, filterConditions, pkColumns.length]); 
   // Depend on pkColumns.length to avoid loop? No, pkColumns is updated inside.
   // Actually, 'pkColumns' state shouldn't trigger re-fetch.
@@ -151,7 +208,10 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   // So it's fine.
 
   // Handlers memoized
-  const handleReload = useCallback(() => fetchData(), [fetchData]);
+  const handleReload = useCallback(() => {
+    countKeyRef.current = '';
+    fetchData(pagination.current, pagination.pageSize);
+  }, [fetchData, pagination.current, pagination.pageSize]);
   const handleSort = useCallback((field: string, order: string) => setSortInfo({ columnKey: field, order }), []);
   const handlePageChange = useCallback((page: number, size: number) => fetchData(page, size), [fetchData]);
   const handleToggleFilter = useCallback(() => setShowFilter(prev => !prev), []);
@@ -162,6 +222,7 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   }, [tab, sortInfo, filterConditions]); // Initial load and re-load on sort/filter
 
   return (
+    <div style={{ flex: '1 1 auto', minHeight: 0, height: '100%', width: '100%', overflow: 'hidden', display: 'flex', flexDirection: 'column' }}>
       <DataGrid
           data={data}
           columnNames={columnNames}
@@ -178,7 +239,8 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
           onToggleFilter={handleToggleFilter}
           onApplyFilter={handleApplyFilter}
       />
+    </div>
   );
 };
 
-export default DataViewer;
+export default DataViewer;

frontend/src/components/Sidebar.tsx

@@ -1,9 +1,9 @@
 import React, { useEffect, useState, useMemo, useRef } from 'react';
 import { Tree, message, Dropdown, MenuProps, Input, Button, Modal, Form, Badge } from 'antd';
-import { 
-  DatabaseOutlined, 
-  TableOutlined, 
-  ConsoleSqlOutlined, 
+	import {
+	  DatabaseOutlined, 
+	  TableOutlined, 
+	  ConsoleSqlOutlined, 
   HddOutlined, 
   FolderOpenOutlined, 
   FileTextOutlined,
@@ -23,10 +23,10 @@ import {
   ReloadOutlined,
   DeleteOutlined,
   DisconnectOutlined
-} from '@ant-design/icons';
-import { useStore } from '../store';
-import { SavedConnection } from '../types';
-import { MySQLGetDatabases, MySQLGetTables, MySQLShowCreateTable, ExportTable, OpenSQLFile, CreateDatabase } from '../../wailsjs/go/app/App';
+	} from '@ant-design/icons';
+	import { useStore } from '../store';
+	import { SavedConnection } from '../types';
+	import { DBGetDatabases, DBGetTables, DBShowCreateTable, ExportTable, OpenSQLFile, CreateDatabase } from '../../wailsjs/go/app/App';
 
 const { Search } = Input;
 
@@ -47,6 +47,8 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
   const [expandedKeys, setExpandedKeys] = useState<React.Key[]>([]);
   const [autoExpandParent, setAutoExpandParent] = useState(true);
   const [loadedKeys, setLoadedKeys] = useState<React.Key[]>([]);
+  const [selectedKeys, setSelectedKeys] = useState<React.Key[]>([]);
+  const [selectedNodes, setSelectedNodes] = useState<any[]>([]);
   const [contextMenu, setContextMenu] = useState<{ x: number, y: number, items: MenuProps['items'] } | null>(null);
   
   // Virtual Scroll State
@@ -116,21 +118,21 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
     });
   };
 
-  const loadDatabases = async (node: any) => {
-      const conn = node.dataRef as SavedConnection;
-      const config = { 
-          ...conn.config, 
+	  const loadDatabases = async (node: any) => {
+	      const conn = node.dataRef as SavedConnection;
+	      const config = { 
+	          ...conn.config, 
           port: Number(conn.config.port),
           password: conn.config.password || "",
           database: conn.config.database || "",
-          useSSH: conn.config.useSSH || false,
-          ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
-      };
-      const res = await MySQLGetDatabases(config as any);
-      if (res.success) {
-        setConnectionStates(prev => ({ ...prev, [conn.id]: 'success' }));
-        let dbs = (res.data as any[]).map((row: any) => ({
-          title: row.Database || row.database,
+	          useSSH: conn.config.useSSH || false,
+	          ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
+	      };
+	      const res = await DBGetDatabases(config as any);
+	      if (res.success) {
+	        setConnectionStates(prev => ({ ...prev, [conn.id]: 'success' }));
+	        let dbs = (res.data as any[]).map((row: any) => ({
+	          title: row.Database || row.database,
           key: `${conn.id}-${row.Database || row.database}`,
           icon: <DatabaseOutlined />,
           type: 'database' as const,
@@ -150,9 +152,9 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
       }
   };
 
-  const loadTables = async (node: any) => {
-      const conn = node.dataRef; // has dbName
-      const dbName = conn.dbName;
+	  const loadTables = async (node: any) => {
+	      const conn = node.dataRef; // has dbName
+	      const dbName = conn.dbName;
       const key = node.key;
       
       const dbQueries = savedQueries.filter(q => q.connectionId === conn.id && q.dbName === dbName);
@@ -178,13 +180,13 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
           port: Number(conn.config.port),
           password: conn.config.password || "",
           database: conn.config.database || "",
-          useSSH: conn.config.useSSH || false,
-          ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
-      };
-      const res = await MySQLGetTables(config as any, conn.dbName);
-      if (res.success) {
-        setConnectionStates(prev => ({ ...prev, [key as string]: 'success' }));
-        const tables = (res.data as any[]).map((row: any) => {
+	          useSSH: conn.config.useSSH || false,
+	          ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
+	      };
+	      const res = await DBGetTables(config as any, conn.dbName);
+	      if (res.success) {
+	        setConnectionStates(prev => ({ ...prev, [key as string]: 'success' }));
+	        const tables = (res.data as any[]).map((row: any) => {
             const tableName = Object.values(row)[0] as string;
             return {
               title: tableName,
@@ -283,10 +285,14 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
   };
 
   const onSelect = (keys: React.Key[], info: any) => {
-      if (!info.node.selected) {
+      setSelectedKeys(keys);
+      setSelectedNodes(info.selectedNodes || []);
+
+      if (keys.length === 0) {
           setActiveContext(null);
           return;
       }
+      if (!info.selected) return;
       
       const { type, dataRef, key, title } = info.node;
       
@@ -313,15 +319,6 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
   };
 
   const onDoubleClick = (e: any, node: any) => {
-      const key = node.key;
-      const isExpanded = expandedKeys.includes(key);
-      const newExpandedKeys = isExpanded 
-          ? expandedKeys.filter(k => k !== key) 
-          : [...expandedKeys, key];
-      
-      setExpandedKeys(newExpandedKeys);
-      if (!isExpanded) setAutoExpandParent(false);
-
       if (node.type === 'table') {
           const { tableName, dbName, id } = node.dataRef;
           addTab({
@@ -332,6 +329,7 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
               dbName,
               tableName,
           });
+          return;
       } else if (node.type === 'saved-query') {
           const q = node.dataRef;
           addTab({
@@ -342,16 +340,26 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
               dbName: q.dbName,
               query: q.sql
           });
+          return;
       }
+
+      const key = node.key;
+      const isExpanded = expandedKeys.includes(key);
+      const newExpandedKeys = isExpanded 
+          ? expandedKeys.filter(k => k !== key) 
+          : [...expandedKeys, key];
+      
+      setExpandedKeys(newExpandedKeys);
+      if (!isExpanded) setAutoExpandParent(false);
   };
   
-  const handleCopyStructure = async (node: any) => {
-      const { config, dbName, tableName } = node.dataRef;
-      const res = await MySQLShowCreateTable({ 
-          ...config, 
-          port: Number(config.port),
-          password: config.password || "",
-          database: config.database || "",
+	  const handleCopyStructure = async (node: any) => {
+	      const { config, dbName, tableName } = node.dataRef;
+	      const res = await DBShowCreateTable({ 
+	          ...config, 
+	          port: Number(config.port),
+	          password: config.password || "",
+	          database: config.database || "",
           useSSH: config.useSSH || false,
           ssh: config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
       } as any, dbName, tableName);
@@ -382,6 +390,60 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
       }
   };
 
+  const normalizeConnConfig = (raw: any) => ({
+      ...raw,
+      port: Number(raw.port),
+      password: raw.password || "",
+      database: raw.database || "",
+      useSSH: raw.useSSH || false,
+      ssh: raw.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
+  });
+
+  const handleExportDatabaseSQL = async (node: any, includeData: boolean) => {
+      const conn = node.dataRef;
+      const dbName = conn.dbName || node.title;
+      const hide = message.loading(includeData ? `正在备份数据库 ${dbName} (结构+数据)...` : `正在导出数据库 ${dbName} 表结构...`, 0);
+      try {
+          const res = await (window as any).go.app.App.ExportDatabaseSQL(normalizeConnConfig(conn.config), dbName, includeData);
+          hide();
+          if (res.success) {
+              message.success('导出成功');
+          } else if (res.message !== 'Cancelled') {
+              message.error('导出失败: ' + res.message);
+          }
+      } catch (e: any) {
+          hide();
+          message.error('导出失败: ' + (e?.message || String(e)));
+      }
+  };
+
+  const handleExportTablesSQL = async (nodes: any[], includeData: boolean) => {
+      if (!nodes || nodes.length === 0) return;
+      const first = nodes[0].dataRef;
+      const dbName = first.dbName;
+      const connId = first.id;
+      const allSame = nodes.every(n => n?.dataRef?.id === connId && n?.dataRef?.dbName === dbName);
+      if (!allSame) {
+          message.error('请在同一连接、同一数据库下选择多张表进行导出');
+          return;
+      }
+
+      const tableNames = nodes.map(n => n.dataRef.tableName).filter(Boolean);
+      const hide = message.loading(includeData ? `正在备份选中表 (${tableNames.length})...` : `正在导出选中表结构 (${tableNames.length})...`, 0);
+      try {
+          const res = await (window as any).go.app.App.ExportTablesSQL(normalizeConnConfig(first.config), dbName, tableNames, includeData);
+          hide();
+          if (res.success) {
+              message.success('导出成功');
+          } else if (res.message !== 'Cancelled') {
+              message.error('导出失败: ' + res.message);
+          }
+      } catch (e: any) {
+          hide();
+          message.error('导出失败: ' + (e?.message || String(e)));
+      }
+  };
+
   const handleRunSQLFile = async (node: any) => {
       const res = await (window as any).go.app.App.OpenSQLFile();
       if (res.success) {
@@ -503,13 +565,21 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                  label: '断开连接',
                  icon: <DisconnectOutlined />,
                  onClick: () => {
+                     // Reset status recursively
                      setConnectionStates(prev => {
                          const next = { ...prev };
-                         delete next[node.key];
+                         Object.keys(next).forEach(k => {
+                             if (k === node.key || k.startsWith(`${node.key}-`)) {
+                                 delete next[k];
+                             }
+                         });
                          return next;
                      });
-                     setExpandedKeys(prev => prev.filter(k => k !== node.key));
-                     setLoadedKeys(prev => prev.filter(k => k !== node.key));
+                     // Collapse node and children
+                     setExpandedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                     // Reset loaded state recursively
+                     setLoadedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                     // Clear children (undefined to trigger reload)
                      setTreeData(origin => updateTreeData(origin, node.key, undefined));
                      message.success("已断开连接");
                  }
@@ -542,6 +612,18 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                icon: <ReloadOutlined />,
                onClick: () => loadTables(node)
            },
+           {
+               key: 'export-db-schema',
+               label: '导出全部表结构 (SQL)',
+               icon: <ExportOutlined />,
+               onClick: () => handleExportDatabaseSQL(node, false)
+           },
+           {
+               key: 'backup-db-sql',
+               label: '备份全部表 (结构+数据 SQL)',
+               icon: <SaveOutlined />,
+               onClick: () => handleExportDatabaseSQL(node, true)
+           },
            { type: 'divider' },
            {
                key: 'disconnect-db',
@@ -553,8 +635,8 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                        delete next[node.key];
                        return next;
                    });
-                   setExpandedKeys(prev => prev.filter(k => k !== node.key));
-                   setLoadedKeys(prev => prev.filter(k => k !== node.key));
+                   setExpandedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                   setLoadedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
                    setTreeData(origin => updateTreeData(origin, node.key, undefined));
                }
            },
@@ -580,7 +662,25 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
              }
        ];
     } else if (node.type === 'table') {
+        const sameContextSelectedTables = (selectedNodes || []).filter((n: any) => n?.type === 'table' && n?.dataRef?.id === node?.dataRef?.id && n?.dataRef?.dbName === node?.dataRef?.dbName);
+        const selectedForAction = sameContextSelectedTables.some((n: any) => n?.key === node.key) ? sameContextSelectedTables : [node];
+
         return [
+            ...(selectedForAction.length > 1 ? ([
+                {
+                    key: 'export-selected-schema',
+                    label: `导出选中表结构 (${selectedForAction.length}) (SQL)`,
+                    icon: <ExportOutlined />,
+                    onClick: () => handleExportTablesSQL(selectedForAction, false)
+                },
+                {
+                    key: 'backup-selected-sql',
+                    label: `备份选中表 (${selectedForAction.length}) (结构+数据 SQL)`,
+                    icon: <SaveOutlined />,
+                    onClick: () => handleExportTablesSQL(selectedForAction, true)
+                },
+                { type: 'divider' as const }
+            ]) : []),
             {
                 key: 'new-query',
                 label: '新建查询',
@@ -676,6 +776,8 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                 loadedKeys={loadedKeys}
                 onLoad={setLoadedKeys}
                 autoExpandParent={autoExpandParent}
+                multiple
+                selectedKeys={selectedKeys}
                 blockNode
                 height={treeHeight}
                 onRightClick={onRightClick}

frontend/src/components/TabManager.tsx

@@ -1,12 +1,13 @@
 import React, { useMemo } from 'react';
-import { Tabs, Button } from 'antd';
+import { Tabs, Dropdown } from 'antd';
+import type { MenuProps } from 'antd';
 import { useStore } from '../store';
 import DataViewer from './DataViewer';
 import QueryEditor from './QueryEditor';
 import TableDesigner from './TableDesigner';
 
 const TabManager: React.FC = () => {
-  const { tabs, activeTabId, setActiveTab, closeTab } = useStore();
+  const { tabs, activeTabId, setActiveTab, closeTab, closeOtherTabs, closeTabsToLeft, closeTabsToRight, closeAllTabs } = useStore();
 
   const onChange = (newActiveKey: string) => {
     setActiveTab(newActiveKey);
@@ -18,7 +19,7 @@ const TabManager: React.FC = () => {
     }
   };
 
-  const items = useMemo(() => tabs.map(tab => {
+  const items = useMemo(() => tabs.map((tab, index) => {
     let content;
     if (tab.type === 'query') {
       content = <QueryEditor tab={tab} />;
@@ -27,27 +28,95 @@ const TabManager: React.FC = () => {
     } else if (tab.type === 'design') {
       content = <TableDesigner tab={tab} />;
     }
+
+    const menuItems: MenuProps['items'] = [
+      {
+        key: 'close-other',
+        label: '关闭其他页',
+        disabled: tabs.length <= 1,
+        onClick: () => closeOtherTabs(tab.id),
+      },
+      {
+        key: 'close-left',
+        label: '关闭左侧',
+        disabled: index === 0,
+        onClick: () => closeTabsToLeft(tab.id),
+      },
+      {
+        key: 'close-right',
+        label: '关闭右侧',
+        disabled: index === tabs.length - 1,
+        onClick: () => closeTabsToRight(tab.id),
+      },
+      { type: 'divider' },
+      {
+        key: 'close-all',
+        label: '关闭所有',
+        disabled: tabs.length === 0,
+        onClick: () => closeAllTabs(),
+      },
+    ];
     
     return {
-      label: tab.title,
+      label: (
+        <Dropdown menu={{ items: menuItems }} trigger={['contextMenu']}>
+          <span onContextMenu={(e) => e.preventDefault()}>{tab.title}</span>
+        </Dropdown>
+      ),
       key: tab.id,
       children: content,
     };
-  }), [tabs]);
+  }), [tabs, closeOtherTabs, closeTabsToLeft, closeTabsToRight, closeAllTabs]);
 
   return (
     <>
         <style>{`
-            .ant-tabs-content { height: 100%; }
-            .ant-tabs-tabpane { height: 100%; }
+            .main-tabs {
+              height: 100%;
+              flex: 1 1 auto;
+              min-height: 0;
+              display: flex;
+              flex-direction: column;
+              overflow: hidden;
+            }
+            .main-tabs .ant-tabs-nav {
+              flex: 0 0 auto;
+            }
+            .main-tabs .ant-tabs-content-holder {
+              flex: 1 1 auto;
+              min-height: 0;
+              overflow: hidden;
+              display: flex;
+              flex-direction: column;
+            }
+            .main-tabs .ant-tabs-content {
+              flex: 1 1 auto;
+              min-height: 0;
+              display: flex;
+              flex-direction: column;
+            }
+            .main-tabs .ant-tabs-tabpane {
+              flex: 1 1 auto;
+              min-height: 0;
+              display: flex;
+              flex-direction: column;
+              overflow: hidden;
+            }
+            .main-tabs .ant-tabs-tabpane > div {
+              flex: 1 1 auto;
+              min-height: 0;
+            }
+            .main-tabs .ant-tabs-tabpane-hidden {
+              display: none !important;
+            }
         `}</style>
         <Tabs
+            className="main-tabs"
             type="editable-card"
             onChange={onChange}
             activeKey={activeTabId || undefined}
             onEdit={onEdit}
             items={items}
-            style={{ height: '100%' }}
             hideAdd
         />
     </>

frontend/src/components/TableDesigner.tsx

@@ -7,7 +7,7 @@ import { CSS } from '@dnd-kit/utilities';
 import { Resizable } from 'react-resizable';
 import { TabData, ColumnDefinition, IndexDefinition, ForeignKeyDefinition, TriggerDefinition } from '../types';
 import { useStore } from '../store';
-import { DBGetColumns, DBGetIndexes, MySQLQuery, DBGetForeignKeys, DBGetTriggers, DBShowCreateTable } from '../../wailsjs/go/app/App';
+import { DBGetColumns, DBGetIndexes, DBQuery, DBGetForeignKeys, DBGetTriggers, DBShowCreateTable } from '../../wailsjs/go/app/App';
 
 // Need styles for react-resizable
 import 'react-resizable/css/styles.css';
@@ -518,15 +518,15 @@ const TableDesigner: React.FC<{ tab: TabData }> = ({ tab }) => {
       }
   };
 
-  const handleExecuteSave = async () => {
-      const conn = connections.find(c => c.id === tab.connectionId);
-      if (!conn) return;
-      const config = { ...conn.config, port: Number(conn.config.port), password: conn.config.password || "", database: conn.config.database || "", useSSH: conn.config.useSSH || false, ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" } };
-      const res = await MySQLQuery(config as any, tab.dbName || '', previewSql);
-      if (res.success) {
-          message.success(isNewTable ? "表创建成功！" : "表结构修改成功！");
-          setIsPreviewOpen(false);
-          if (!isNewTable) {
+	  const handleExecuteSave = async () => {
+	      const conn = connections.find(c => c.id === tab.connectionId);
+	      if (!conn) return;
+	      const config = { ...conn.config, port: Number(conn.config.port), password: conn.config.password || "", database: conn.config.database || "", useSSH: conn.config.useSSH || false, ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" } };
+	      const res = await DBQuery(config as any, tab.dbName || '', previewSql);
+	      if (res.success) {
+	          message.success(isNewTable ? "表创建成功！" : "表结构修改成功！");
+	          setIsPreviewOpen(false);
+	          if (!isNewTable) {
               fetchData();
           } else {
               // TODO: Close tab or reload sidebar?
@@ -550,7 +550,6 @@ const TableDesigner: React.FC<{ tab: TabData }> = ({ tab }) => {
       <div ref={containerRef} className="table-designer-wrapper" style={{ height: '100%', overflow: 'hidden', position: 'relative' }}>
         <style>{`
            .table-designer-wrapper .ant-table-body {
-               height: ${tableHeight}px !important;
                max-height: ${tableHeight}px !important;
            }
         `}</style>
@@ -730,4 +729,4 @@ const TableDesigner: React.FC<{ tab: TabData }> = ({ tab }) => {
   );
 };
 
-export default TableDesigner;
+export default TableDesigner;

frontend/src/store.ts

@@ -21,6 +21,7 @@ interface AppState {
   savedQueries: SavedQuery[];
   darkMode: boolean;
   sqlFormatOptions: { keywordCase: 'upper' | 'lower' };
+  queryOptions: { maxRows: number };
   sqlLogs: SqlLog[];
   
   addConnection: (conn: SavedConnection) => void;
@@ -29,6 +30,10 @@ interface AppState {
   
   addTab: (tab: TabData) => void;
   closeTab: (id: string) => void;
+  closeOtherTabs: (id: string) => void;
+  closeTabsToLeft: (id: string) => void;
+  closeTabsToRight: (id: string) => void;
+  closeAllTabs: () => void;
   setActiveTab: (id: string) => void;
   setActiveContext: (context: { connectionId: string; dbName: string } | null) => void;
 
@@ -37,6 +42,7 @@ interface AppState {
 
   toggleDarkMode: () => void;
   setSqlFormatOptions: (options: { keywordCase: 'upper' | 'lower' }) => void;
+  setQueryOptions: (options: Partial<{ maxRows: number }>) => void;
   
   addSqlLog: (log: SqlLog) => void;
   clearSqlLogs: () => void;
@@ -52,6 +58,7 @@ export const useStore = create<AppState>()(
       savedQueries: [],
       darkMode: false,
       sqlFormatOptions: { keywordCase: 'upper' },
+      queryOptions: { maxRows: 5000 },
       sqlLogs: [],
 
       addConnection: (conn) => set((state) => ({ connections: [...state.connections, conn] })),
@@ -79,6 +86,30 @@ export const useStore = create<AppState>()(
         }
         return { tabs: newTabs, activeTabId: newActiveId };
       }),
+
+      closeOtherTabs: (id) => set((state) => {
+        const keep = state.tabs.find(t => t.id === id);
+        if (!keep) return state;
+        return { tabs: [keep], activeTabId: id };
+      }),
+
+      closeTabsToLeft: (id) => set((state) => {
+        const index = state.tabs.findIndex(t => t.id === id);
+        if (index === -1) return state;
+        const newTabs = state.tabs.slice(index);
+        const activeStillExists = state.activeTabId ? newTabs.some(t => t.id === state.activeTabId) : false;
+        return { tabs: newTabs, activeTabId: activeStillExists ? state.activeTabId : id };
+      }),
+
+      closeTabsToRight: (id) => set((state) => {
+        const index = state.tabs.findIndex(t => t.id === id);
+        if (index === -1) return state;
+        const newTabs = state.tabs.slice(0, index + 1);
+        const activeStillExists = state.activeTabId ? newTabs.some(t => t.id === state.activeTabId) : false;
+        return { tabs: newTabs, activeTabId: activeStillExists ? state.activeTabId : id };
+      }),
+
+      closeAllTabs: () => set(() => ({ tabs: [], activeTabId: null })),
       
       setActiveTab: (id) => set({ activeTabId: id }),
       setActiveContext: (context) => set({ activeContext: context }),
@@ -96,13 +127,14 @@ export const useStore = create<AppState>()(
 
       toggleDarkMode: () => set((state) => ({ darkMode: !state.darkMode })),
       setSqlFormatOptions: (options) => set({ sqlFormatOptions: options }),
+      setQueryOptions: (options) => set((state) => ({ queryOptions: { ...state.queryOptions, ...options } })),
       
       addSqlLog: (log) => set((state) => ({ sqlLogs: [log, ...state.sqlLogs].slice(0, 1000) })), // Keep last 1000 logs
       clearSqlLogs: () => set({ sqlLogs: [] }),
     }),
     {
       name: 'lite-db-storage', // name of the item in the storage (must be unique)
-      partialize: (state) => ({ connections: state.connections, savedQueries: state.savedQueries, darkMode: state.darkMode, sqlFormatOptions: state.sqlFormatOptions }), // Don't persist logs
+      partialize: (state) => ({ connections: state.connections, savedQueries: state.savedQueries, darkMode: state.darkMode, sqlFormatOptions: state.sqlFormatOptions, queryOptions: state.queryOptions }), // Don't persist logs
     }
   )
-);
+);

frontend/src/utils/sql.ts

@@ -0,0 +1,173 @@
+export type FilterCondition = {
+  id?: number;
+  column?: string;
+  op?: string;
+  value?: string;
+  value2?: string;
+};
+
+const normalizeIdentPart = (ident: string) => {
+  let raw = (ident || '').trim();
+  if (!raw) return raw;
+  const first = raw[0];
+  const last = raw[raw.length - 1];
+  if ((first === '"' && last === '"') || (first === '`' && last === '`')) {
+    raw = raw.slice(1, -1).trim();
+  }
+  raw = raw.replace(/["`]/g, '').trim();
+  return raw;
+};
+
+export const quoteIdentPart = (dbType: string, ident: string) => {
+  const raw = normalizeIdentPart(ident);
+  if (!raw) return raw;
+  if ((dbType || '').toLowerCase() === 'mysql') return `\`${raw.replace(/`/g, '``')}\``;
+  return `"${raw.replace(/"/g, '""')}"`;
+};
+
+export const quoteQualifiedIdent = (dbType: string, ident: string) => {
+  const raw = (ident || '').trim();
+  if (!raw) return raw;
+  const parts = raw.split('.').map(normalizeIdentPart).filter(Boolean);
+  if (parts.length <= 1) return quoteIdentPart(dbType, raw);
+  return parts.map(p => quoteIdentPart(dbType, p)).join('.');
+};
+
+export const escapeLiteral = (val: string) => (val || '').replace(/'/g, "''");
+
+export const parseListValues = (val: string) => {
+  const raw = (val || '').trim();
+  if (!raw) return [];
+  return raw
+    .split(/[\n,，]+/)
+    .map(s => s.trim())
+    .filter(Boolean);
+};
+
+export const buildWhereSQL = (dbType: string, conditions: FilterCondition[]) => {
+  const whereParts: string[] = [];
+
+  (conditions || []).forEach((cond) => {
+    const op = (cond?.op || '').trim();
+    const column = (cond?.column || '').trim();
+    const value = (cond?.value ?? '').toString();
+    const value2 = (cond?.value2 ?? '').toString();
+
+    if (op === 'CUSTOM') {
+      const expr = value.trim();
+      if (expr) whereParts.push(`(${expr})`);
+      return;
+    }
+
+    if (!column) return;
+
+    const col = quoteIdentPart(dbType, column);
+
+    switch (op) {
+      case 'IS_NULL':
+        whereParts.push(`${col} IS NULL`);
+        return;
+      case 'IS_NOT_NULL':
+        whereParts.push(`${col} IS NOT NULL`);
+        return;
+      case 'IS_EMPTY':
+        // 兼容：空值通常理解为 NULL 或空字符串
+        whereParts.push(`(${col} IS NULL OR ${col} = '')`);
+        return;
+      case 'IS_NOT_EMPTY':
+        whereParts.push(`(${col} IS NOT NULL AND ${col} <> '')`);
+        return;
+      case 'BETWEEN': {
+        const v1 = value.trim();
+        const v2 = value2.trim();
+        if (!v1 || !v2) return;
+        whereParts.push(`${col} BETWEEN '${escapeLiteral(v1)}' AND '${escapeLiteral(v2)}'`);
+        return;
+      }
+      case 'NOT_BETWEEN': {
+        const v1 = value.trim();
+        const v2 = value2.trim();
+        if (!v1 || !v2) return;
+        whereParts.push(`${col} NOT BETWEEN '${escapeLiteral(v1)}' AND '${escapeLiteral(v2)}'`);
+        return;
+      }
+      case 'IN': {
+        const items = parseListValues(value);
+        if (items.length === 0) return;
+        const list = items.map(v => `'${escapeLiteral(v)}'`).join(', ');
+        whereParts.push(`${col} IN (${list})`);
+        return;
+      }
+      case 'NOT_IN': {
+        const items = parseListValues(value);
+        if (items.length === 0) return;
+        const list = items.map(v => `'${escapeLiteral(v)}'`).join(', ');
+        whereParts.push(`${col} NOT IN (${list})`);
+        return;
+      }
+      case 'CONTAINS': {
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} LIKE '%${escapeLiteral(v)}%'`);
+        return;
+      }
+      case 'NOT_CONTAINS': {
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} NOT LIKE '%${escapeLiteral(v)}%'`);
+        return;
+      }
+      case 'STARTS_WITH': {
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} LIKE '${escapeLiteral(v)}%'`);
+        return;
+      }
+      case 'NOT_STARTS_WITH': {
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} NOT LIKE '${escapeLiteral(v)}%'`);
+        return;
+      }
+      case 'ENDS_WITH': {
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} LIKE '%${escapeLiteral(v)}'`);
+        return;
+      }
+      case 'NOT_ENDS_WITH': {
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} NOT LIKE '%${escapeLiteral(v)}'`);
+        return;
+      }
+      case '=':
+      case '!=':
+      case '<':
+      case '<=':
+      case '>':
+      case '>=': {
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} ${op} '${escapeLiteral(v)}'`);
+        return;
+      }
+      default: {
+        // 兼容旧值：LIKE
+        if (op.toUpperCase() === 'LIKE') {
+          const v = value.trim();
+          if (!v) return;
+          whereParts.push(`${col} LIKE '%${escapeLiteral(v)}%'`);
+          return;
+        }
+
+        const v = value.trim();
+        if (!v) return;
+        whereParts.push(`${col} ${op} '${escapeLiteral(v)}'`);
+      }
+    }
+  });
+
+  return whereParts.length > 0 ? `WHERE ${whereParts.join(' AND ')}` : '';
+};
+

frontend/wailsjs/go/app/App.d.ts

@@ -1,6 +1,7 @@
 // Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
 // This file is automatically generated. DO NOT EDIT
 import {connection} from '../models';
+import {sync} from '../models';
 
 export function ApplyChanges(arg1:connection.ConnectionConfig,arg2:string,arg3:string,arg4:connection.ChangeSet):Promise<connection.QueryResult>;
 
@@ -26,10 +27,22 @@ export function DBQuery(arg1:connection.ConnectionConfig,arg2:string,arg3:string
 
 export function DBShowCreateTable(arg1:connection.ConnectionConfig,arg2:string,arg3:string):Promise<connection.QueryResult>;
 
+export function DataSync(arg1:sync.SyncConfig):Promise<sync.SyncResult>;
+
+export function DataSyncAnalyze(arg1:sync.SyncConfig):Promise<connection.QueryResult>;
+
+export function DataSyncPreview(arg1:sync.SyncConfig,arg2:string,arg3:number):Promise<connection.QueryResult>;
+
 export function ExportData(arg1:Array<Record<string, any>>,arg2:Array<string>,arg3:string,arg4:string):Promise<connection.QueryResult>;
 
+export function ExportDatabaseSQL(arg1:connection.ConnectionConfig,arg2:string,arg3:boolean):Promise<connection.QueryResult>;
+
+export function ExportQuery(arg1:connection.ConnectionConfig,arg2:string,arg3:string,arg4:string,arg5:string):Promise<connection.QueryResult>;
+
 export function ExportTable(arg1:connection.ConnectionConfig,arg2:string,arg3:string,arg4:string):Promise<connection.QueryResult>;
 
+export function ExportTablesSQL(arg1:connection.ConnectionConfig,arg2:string,arg3:Array<string>,arg4:boolean):Promise<connection.QueryResult>;
+
 export function ImportConfigFile():Promise<connection.QueryResult>;
 
 export function ImportData(arg1:connection.ConnectionConfig,arg2:string,arg3:string):Promise<connection.QueryResult>;

frontend/wailsjs/go/app/App.js

@@ -50,14 +50,38 @@ export function DBShowCreateTable(arg1, arg2, arg3) {
   return window['go']['app']['App']['DBShowCreateTable'](arg1, arg2, arg3);
 }
 
+export function DataSync(arg1) {
+  return window['go']['app']['App']['DataSync'](arg1);
+}
+
+export function DataSyncAnalyze(arg1) {
+  return window['go']['app']['App']['DataSyncAnalyze'](arg1);
+}
+
+export function DataSyncPreview(arg1, arg2, arg3) {
+  return window['go']['app']['App']['DataSyncPreview'](arg1, arg2, arg3);
+}
+
 export function ExportData(arg1, arg2, arg3, arg4) {
   return window['go']['app']['App']['ExportData'](arg1, arg2, arg3, arg4);
 }
 
+export function ExportDatabaseSQL(arg1, arg2, arg3) {
+  return window['go']['app']['App']['ExportDatabaseSQL'](arg1, arg2, arg3);
+}
+
+export function ExportQuery(arg1, arg2, arg3, arg4, arg5) {
+  return window['go']['app']['App']['ExportQuery'](arg1, arg2, arg3, arg4, arg5);
+}
+
 export function ExportTable(arg1, arg2, arg3, arg4) {
   return window['go']['app']['App']['ExportTable'](arg1, arg2, arg3, arg4);
 }
 
+export function ExportTablesSQL(arg1, arg2, arg3, arg4) {
+  return window['go']['app']['App']['ExportTablesSQL'](arg1, arg2, arg3, arg4);
+}
+
 export function ImportConfigFile() {
   return window['go']['app']['App']['ImportConfigFile']();
 }

frontend/wailsjs/go/models.ts

@@ -77,6 +77,9 @@ export namespace connection {
 	    database: string;
 	    useSSH: boolean;
 	    ssh: SSHConfig;
+	    driver?: string;
+	    dsn?: string;
+	    timeout?: number;
 	
 	    static createFrom(source: any = {}) {
 	        return new ConnectionConfig(source);
@@ -92,6 +95,9 @@ export namespace connection {
 	        this.database = source["database"];
 	        this.useSSH = source["useSSH"];
 	        this.ssh = this.convertValues(source["ssh"], SSHConfig);
+	        this.driver = source["driver"];
+	        this.dsn = source["dsn"];
+	        this.timeout = source["timeout"];
 	    }
 	
 		convertValues(a: any, classs: any, asMap: boolean = false): any {
@@ -134,3 +140,98 @@ export namespace connection {
 
 }
 
+export namespace sync {
+	
+	export class TableOptions {
+	    insert?: boolean;
+	    update?: boolean;
+	    delete?: boolean;
+	    selectedInsertPks?: string[];
+	    selectedUpdatePks?: string[];
+	    selectedDeletePks?: string[];
+	
+	    static createFrom(source: any = {}) {
+	        return new TableOptions(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.insert = source["insert"];
+	        this.update = source["update"];
+	        this.delete = source["delete"];
+	        this.selectedInsertPks = source["selectedInsertPks"];
+	        this.selectedUpdatePks = source["selectedUpdatePks"];
+	        this.selectedDeletePks = source["selectedDeletePks"];
+	    }
+	}
+	export class SyncConfig {
+	    sourceConfig: connection.ConnectionConfig;
+	    targetConfig: connection.ConnectionConfig;
+	    tables: string[];
+	    content?: string;
+	    mode: string;
+	    jobId?: string;
+	    autoAddColumns?: boolean;
+	    tableOptions?: Record<string, TableOptions>;
+	
+	    static createFrom(source: any = {}) {
+	        return new SyncConfig(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.sourceConfig = this.convertValues(source["sourceConfig"], connection.ConnectionConfig);
+	        this.targetConfig = this.convertValues(source["targetConfig"], connection.ConnectionConfig);
+	        this.tables = source["tables"];
+	        this.content = source["content"];
+	        this.mode = source["mode"];
+	        this.jobId = source["jobId"];
+	        this.autoAddColumns = source["autoAddColumns"];
+	        this.tableOptions = this.convertValues(source["tableOptions"], TableOptions, true);
+	    }
+	
+		convertValues(a: any, classs: any, asMap: boolean = false): any {
+		    if (!a) {
+		        return a;
+		    }
+		    if (a.slice && a.map) {
+		        return (a as any[]).map(elem => this.convertValues(elem, classs));
+		    } else if ("object" === typeof a) {
+		        if (asMap) {
+		            for (const key of Object.keys(a)) {
+		                a[key] = new classs(a[key]);
+		            }
+		            return a;
+		        }
+		        return new classs(a);
+		    }
+		    return a;
+		}
+	}
+	export class SyncResult {
+	    success: boolean;
+	    message: string;
+	    logs: string[];
+	    tablesSynced: number;
+	    rowsInserted: number;
+	    rowsUpdated: number;
+	    rowsDeleted: number;
+	
+	    static createFrom(source: any = {}) {
+	        return new SyncResult(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.success = source["success"];
+	        this.message = source["message"];
+	        this.logs = source["logs"];
+	        this.tablesSynced = source["tablesSynced"];
+	        this.rowsInserted = source["rowsInserted"];
+	        this.rowsUpdated = source["rowsUpdated"];
+	        this.rowsDeleted = source["rowsDeleted"];
+	    }
+	}
+
+}
+

go.mod

@@ -3,8 +3,11 @@ module GoNavi-Wails
 go 1.24.3
 
 require (
+	gitea.com/kingbase/gokb v0.0.0-20201021123113-29bd62a876c3
+	gitee.com/chunanyong/dm v1.8.22
 	github.com/go-sql-driver/mysql v1.9.3
 	github.com/lib/pq v1.11.1
+	github.com/sijms/go-ora/v2 v2.9.0
 	github.com/wailsapp/wails/v2 v2.11.0
 	golang.org/x/crypto v0.47.0
 	modernc.org/sqlite v1.44.3
@@ -16,6 +19,7 @@ require (
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
 	github.com/jchv/go-winloader v0.0.0-20210711035445-715c2860da7e // indirect

go.sum

@@ -1,5 +1,9 @@
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+gitea.com/kingbase/gokb v0.0.0-20201021123113-29bd62a876c3 h1:QjslQNaH5Nuap5i4nijS0OYV6GMk5kqrAmgU90zBKd4=
+gitea.com/kingbase/gokb v0.0.0-20201021123113-29bd62a876c3/go.mod h1:7lH5A1jzCXD9Nl16DzaBUOfDAT8NPrDmZwKu1p5wf94=
+gitee.com/chunanyong/dm v1.8.22 h1:H7fsrnUIvEA0jlDWew7vwELry1ff+tLMIu2Fk2cIBSg=
+gitee.com/chunanyong/dm v1.8.22/go.mod h1:EPRJnuPFgbyOFgJ0TRYCTGzhq+ZT4wdyaj/GW/LLcNg=
 github.com/bep/debounce v1.2.1 h1:v67fRdBA9UQu2NhLFXrSg0Brw7CexQekrBwDMM8bzeY=
 github.com/bep/debounce v1.2.1/go.mod h1:H8yggRPQKLUhUoqrJC1bO2xNya7vanpDl7xR3ISbCJ0=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -12,6 +16,9 @@ github.com/go-sql-driver/mysql v1.9.3 h1:U/N249h2WzJ3Ukj8SowVFjdtZKfu9vlLZxjPXV1
 github.com/go-sql-driver/mysql v1.9.3/go.mod h1:qn46aNg1333BRMNU69Lq93t8du/dwxI64Gl8i5p1WMU=
 github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
 github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
+github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e h1:ijClszYn+mADRFY17kjQEVQ1XRhq2/JR1M3sGqeJoxs=
 github.com/google/pprof v0.0.0-20250317173921-a4b03ec1a45e/go.mod h1:boTsfXsheKC2y+lKOCMpSfarhxDeIzfZG1jqGcPl3cA=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
@@ -61,6 +68,8 @@ github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/samber/lo v1.49.1 h1:4BIFyVfuQSEpluc7Fua+j1NolZHiEHEpaSEKdsH0tew=
 github.com/samber/lo v1.49.1/go.mod h1:dO6KHFzUKXgP8LDhU0oI8d2hekjXnGOu0DB8Jecxd6o=
+github.com/sijms/go-ora/v2 v2.9.0 h1:+iQbUeTeCOFMb5BsOMgUhV8KWyrv9yjKpcK4x7+MFrg=
+github.com/sijms/go-ora/v2 v2.9.0/go.mod h1:QgFInVi3ZWyqAiJwzBQA+nbKYKH77tdp1PYoCqhR2dU=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/tkrajina/go-reflector v0.5.8 h1:yPADHrwmUbMq4RGEyaOUpz2H90sRsETNVpjzo3DLVQQ=
@@ -97,6 +106,7 @@ golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.39.0 h1:RclSuaJf32jOqZz74CkPA9qFuVTX7vhLlpfj/IGWlqY=
 golang.org/x/term v0.39.0/go.mod h1:yxzUCTP/U+FzoxfdKmLaA0RV1WgE0VY7hXBwKtY/4ww=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.33.0 h1:B3njUFyqtHDUI5jMn1YIr5B0IE2U0qck04r6d4KPAxE=
 golang.org/x/text v0.33.0/go.mod h1:LuMebE6+rBincTi9+xWTY8TztLzKHc/9C1uBCG27+q8=

internal/app/app.go

@@ -2,11 +2,18 @@ package app
 
 import (
 	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
 	"fmt"
+	"net"
+	"strings"
 	"sync"
 
 	"GoNavi-Wails/internal/connection"
 	"GoNavi-Wails/internal/db"
+	"GoNavi-Wails/internal/logger"
 )
 
 // App struct
@@ -27,55 +34,146 @@ func NewApp() *App {
 // so we can call the runtime methods
 func (a *App) Startup(ctx context.Context) {
 	a.ctx = ctx
+	logger.Init()
+	logger.Infof("应用启动完成")
 }
 
 // Shutdown is called when the app terminates
 func (a *App) Shutdown(ctx context.Context) {
+	logger.Infof("应用开始关闭，准备释放资源")
 	a.mu.Lock()
 	defer a.mu.Unlock()
 	for _, dbInst := range a.dbCache {
-		dbInst.Close()
+		if err := dbInst.Close(); err != nil {
+			logger.Error(err, "关闭数据库连接失败")
+		}
 	}
+	logger.Infof("资源释放完成，应用已关闭")
+	logger.Close()
 }
 
 // Helper: Generate a unique key for the connection config
 func getCacheKey(config connection.ConnectionConfig) string {
-	sshPart := ""
-	if config.UseSSH {
-		sshPart = fmt.Sprintf("|ssh:%s@%s:%d|%s", config.SSH.User, config.SSH.Host, config.SSH.Port, config.SSH.KeyPath)
-		// We don't include SSH password in key string to avoid log exposure if key is logged, 
-		// but for cache uniqueness it is critical. 
-		// Let's include a hash or just the value if we assume internal use.
-		// Including value for correctness.
-		sshPart += "|" + config.SSH.Password
+	if !config.UseSSH {
+		config.SSH = connection.SSHConfig{}
 	}
-	return fmt.Sprintf("%s|%s:%s@%s:%d|%s%s", config.Type, config.User, config.Password, config.Host, config.Port, config.Database, sshPart)
+	// 保持与驱动默认一致，避免同一连接被重复缓存
+	if config.Type == "postgres" && config.Database == "" {
+		config.Database = "postgres"
+	}
+
+	b, _ := json.Marshal(config)
+	sum := sha256.Sum256(b)
+	return hex.EncodeToString(sum[:])
+}
+
+func wrapConnectError(config connection.ConnectionConfig, err error) error {
+	if err == nil {
+		return nil
+	}
+
+	var netErr net.Error
+	if errors.Is(err, context.DeadlineExceeded) || (errors.As(err, &netErr) && netErr.Timeout()) {
+		dbName := config.Database
+		if dbName == "" {
+			dbName = "(default)"
+		}
+		err = fmt.Errorf("数据库连接超时：%s %s:%d/%s：%w", config.Type, config.Host, config.Port, dbName, err)
+	}
+
+	return withLogHint{err: err, logPath: logger.Path()}
+}
+
+type withLogHint struct {
+	err     error
+	logPath string
+}
+
+func (e withLogHint) Error() string {
+	if strings.TrimSpace(e.logPath) == "" {
+		return e.err.Error()
+	}
+	return fmt.Sprintf("%s（详细日志：%s）", e.err.Error(), e.logPath)
+}
+
+func (e withLogHint) Unwrap() error {
+	return e.err
+}
+
+func formatConnSummary(config connection.ConnectionConfig) string {
+	timeoutSeconds := config.Timeout
+	if timeoutSeconds <= 0 {
+		timeoutSeconds = 30
+	}
+
+	dbName := config.Database
+	if strings.TrimSpace(dbName) == "" {
+		dbName = "(default)"
+	}
+
+	var b strings.Builder
+	b.WriteString(fmt.Sprintf("类型=%s 地址=%s:%d 数据库=%s 用户=%s 超时=%ds",
+		config.Type, config.Host, config.Port, dbName, config.User, timeoutSeconds))
+
+	if config.UseSSH {
+		b.WriteString(fmt.Sprintf(" SSH=%s:%d 用户=%s", config.SSH.Host, config.SSH.Port, config.SSH.User))
+	}
+
+	if config.Type == "custom" {
+		driver := strings.TrimSpace(config.Driver)
+		if driver == "" {
+			driver = "(未配置)"
+		}
+		dsnState := "未配置"
+		if strings.TrimSpace(config.DSN) != "" {
+			dsnState = fmt.Sprintf("已配置(长度=%d)", len(config.DSN))
+		}
+		b.WriteString(fmt.Sprintf(" 驱动=%s DSN=%s", driver, dsnState))
+	}
+
+	return b.String()
 }
 
 // Helper: Get or create a database connection
 func (a *App) getDatabase(config connection.ConnectionConfig) (db.Database, error) {
 	key := getCacheKey(config)
+	shortKey := key
+	if len(shortKey) > 12 {
+		shortKey = shortKey[:12]
+	}
+	logger.Infof("获取数据库连接：%s 缓存Key=%s", formatConnSummary(config), shortKey)
 
 	a.mu.Lock()
 	defer a.mu.Unlock()
 
 	if dbInst, ok := a.dbCache[key]; ok {
+		logger.Infof("命中连接缓存，开始检测可用性：缓存Key=%s", shortKey)
 		if err := dbInst.Ping(); err == nil {
+			logger.Infof("缓存连接可用：缓存Key=%s", shortKey)
 			return dbInst, nil
+		} else {
+			logger.Error(err, "缓存连接不可用，准备重建：缓存Key=%s", shortKey)
+		}
+		if err := dbInst.Close(); err != nil {
+			logger.Error(err, "关闭失效缓存连接失败：缓存Key=%s", shortKey)
 		}
-		dbInst.Close()
 		delete(a.dbCache, key)
 	}
 
+	logger.Infof("创建数据库驱动实例：类型=%s 缓存Key=%s", config.Type, shortKey)
 	dbInst, err := db.NewDatabase(config.Type)
 	if err != nil {
+		logger.Error(err, "创建数据库驱动实例失败：类型=%s 缓存Key=%s", config.Type, shortKey)
 		return nil, err
 	}
 
 	if err := dbInst.Connect(config); err != nil {
-		return nil, err
+		wrapped := wrapConnectError(config, err)
+		logger.Error(wrapped, "建立数据库连接失败：%s 缓存Key=%s", formatConnSummary(config), shortKey)
+		return nil, wrapped
 	}
 
 	a.dbCache[key] = dbInst
+	logger.Infof("数据库连接成功并写入缓存：%s 缓存Key=%s", formatConnSummary(config), shortKey)
 	return dbInst, nil
 }

internal/app/db_context.go

@@ -0,0 +1,56 @@
+package app
+
+import (
+	"strings"
+
+	"GoNavi-Wails/internal/connection"
+)
+
+func normalizeRunConfig(config connection.ConnectionConfig, dbName string) connection.ConnectionConfig {
+	runConfig := config
+	name := strings.TrimSpace(dbName)
+	if name == "" {
+		return runConfig
+	}
+
+	switch strings.ToLower(strings.TrimSpace(config.Type)) {
+	case "mysql", "postgres", "kingbase":
+		// 这些类型的 dbName 表示“数据库”，需要写入连接配置以选择目标库。
+		runConfig.Database = name
+	case "dameng":
+		// 达梦使用 schema 参数，沿用现有行为：dbName 表示 schema。
+		runConfig.Database = name
+	default:
+		// oracle: dbName 表示 schema/owner，不能覆盖 config.Database（服务名）
+		// sqlite: 无需设置 Database
+		// custom: 语义不明确，避免污染缓存 key
+	}
+
+	return runConfig
+}
+
+func normalizeSchemaAndTable(config connection.ConnectionConfig, dbName string, tableName string) (string, string) {
+	rawTable := strings.TrimSpace(tableName)
+	rawDB := strings.TrimSpace(dbName)
+	if rawTable == "" {
+		return rawDB, rawTable
+	}
+
+	if parts := strings.SplitN(rawTable, ".", 2); len(parts) == 2 {
+		schema := strings.TrimSpace(parts[0])
+		table := strings.TrimSpace(parts[1])
+		if schema != "" && table != "" {
+			return schema, table
+		}
+	}
+
+	switch strings.ToLower(strings.TrimSpace(config.Type)) {
+	case "postgres", "kingbase":
+		// PG/金仓：dbName 在 UI 里是“数据库”，schema 需从 tableName 或使用默认 public。
+		return "public", rawTable
+	default:
+		// MySQL：dbName 表示数据库；Oracle/达梦：dbName 表示 schema/owner。
+		return rawDB, rawTable
+	}
+}
+

internal/app/methods_db.go

@@ -1,53 +1,38 @@
 package app
 
 import (
+	"context"
 	"fmt"
 	"strings"
+	"time"
 
 	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
+	"GoNavi-Wails/internal/utils"
 )
 
 // Generic DB Methods
 
 func (a *App) DBConnect(config connection.ConnectionConfig) connection.QueryResult {
-	key := getCacheKey(config)
-	
-	// Use an anonymous function to scope the lock
-	func() {
-		a.mu.Lock()
-		defer a.mu.Unlock()
-		if oldDB, ok := a.dbCache[key]; ok {
-			oldDB.Close()
-			delete(a.dbCache, key)
-		}
-	}()
-
-	// getDatabase acquires the lock internally, so we must be unlocked here
+	// getDatabase checks cache and Pings. If valid, reuses. If not, connects.
 	_, err := a.getDatabase(config)
 	if err != nil {
+		logger.Error(err, "DBConnect 连接失败：%s", formatConnSummary(config))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 	
+	logger.Infof("DBConnect 连接成功：%s", formatConnSummary(config))
 	return connection.QueryResult{Success: true, Message: "连接成功"}
 }
 
 func (a *App) TestConnection(config connection.ConnectionConfig) connection.QueryResult {
-	// Force close existing cached connection if any to ensure fresh test
-	key := getCacheKey(config)
-	func() {
-		a.mu.Lock()
-		defer a.mu.Unlock()
-		if oldDB, ok := a.dbCache[key]; ok {
-			oldDB.Close()
-			delete(a.dbCache, key)
-		}
-	}()
-
 	_, err := a.getDatabase(config)
 	if err != nil {
+		logger.Error(err, "TestConnection 连接测试失败：%s", formatConnSummary(config))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 	
+	logger.Infof("TestConnection 连接测试成功：%s", formatConnSummary(config))
 	return connection.QueryResult{Success: true, Message: "连接成功"}
 }
 
@@ -60,9 +45,11 @@ func (a *App) CreateDatabase(config connection.ConnectionConfig, dbName string)
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
-	query := fmt.Sprintf("CREATE DATABASE `%%s` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci", dbName)
+	escapedDbName := strings.ReplaceAll(dbName, "`", "``")
+	query := fmt.Sprintf("CREATE DATABASE `%s` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci", escapedDbName)
 	if runConfig.Type == "postgres" {
-		query = fmt.Sprintf("CREATE DATABASE \"%%s\"", dbName)
+		escapedDbName = strings.ReplaceAll(dbName, `"`, `""`)
+		query = fmt.Sprintf("CREATE DATABASE \"%s\"", escapedDbName)
 	}
 
 	_, err = dbInst.Exec(query)
@@ -99,40 +86,74 @@ func (a *App) MySQLShowCreateTable(config connection.ConnectionConfig, dbName st
 }
 
 func (a *App) DBQuery(config connection.ConnectionConfig, dbName string, query string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
+		logger.Error(err, "DBQuery 获取连接失败：%s", formatConnSummary(runConfig))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
+	query = sanitizeSQLForPgLike(runConfig.Type, query)
+	timeoutSeconds := runConfig.Timeout
+	if timeoutSeconds <= 0 {
+		timeoutSeconds = 30
+	}
+	ctx, cancel := utils.ContextWithTimeout(time.Duration(timeoutSeconds) * time.Second)
+	defer cancel()
+
 	lowerQuery := strings.TrimSpace(strings.ToLower(query))
 	if strings.HasPrefix(lowerQuery, "select") || strings.HasPrefix(lowerQuery, "show") || strings.HasPrefix(lowerQuery, "describe") || strings.HasPrefix(lowerQuery, "explain") {
-		data, columns, err := dbInst.Query(query)
+		var data []map[string]interface{}
+		var columns []string
+		if q, ok := dbInst.(interface {
+			QueryContext(context.Context, string) ([]map[string]interface{}, []string, error)
+		}); ok {
+			data, columns, err = q.QueryContext(ctx, query)
+		} else {
+			data, columns, err = dbInst.Query(query)
+		}
 		if err != nil {
+			logger.Error(err, "DBQuery 查询失败：%s SQL片段=%q", formatConnSummary(runConfig), sqlSnippet(query))
 			return connection.QueryResult{Success: false, Message: err.Error()}
 		}
 		return connection.QueryResult{Success: true, Data: data, Fields: columns}
 	} else {
-		affected, err := dbInst.Exec(query)
+		var affected int64
+		if e, ok := dbInst.(interface {
+			ExecContext(context.Context, string) (int64, error)
+		}); ok {
+			affected, err = e.ExecContext(ctx, query)
+		} else {
+			affected, err = dbInst.Exec(query)
+		}
 		if err != nil {
+			logger.Error(err, "DBQuery 执行失败：%s SQL片段=%q", formatConnSummary(runConfig), sqlSnippet(query))
 			return connection.QueryResult{Success: false, Message: err.Error()}
 		}
 		return connection.QueryResult{Success: true, Data: map[string]int64{"affectedRows": affected}}
 	}
 }
 
+func sqlSnippet(query string) string {
+	q := strings.TrimSpace(query)
+	const max = 200
+	if len(q) <= max {
+		return q
+	}
+	return q[:max] + "..."
+}
+
 func (a *App) DBGetDatabases(config connection.ConnectionConfig) connection.QueryResult {
 	dbInst, err := a.getDatabase(config)
 	if err != nil {
+		logger.Error(err, "DBGetDatabases 获取连接失败：%s", formatConnSummary(config))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
 	dbs, err := dbInst.GetDatabases()
 	if err != nil {
+		logger.Error(err, "DBGetDatabases 获取数据库列表失败：%s", formatConnSummary(config))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 	
@@ -145,18 +166,17 @@ func (a *App) DBGetDatabases(config connection.ConnectionConfig) connection.Quer
 }
 
 func (a *App) DBGetTables(config connection.ConnectionConfig, dbName string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
+		logger.Error(err, "DBGetTables 获取连接失败：%s", formatConnSummary(runConfig))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
 	tables, err := dbInst.GetTables(dbName)
 	if err != nil {
+		logger.Error(err, "DBGetTables 获取表列表失败：%s", formatConnSummary(runConfig))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
@@ -169,18 +189,18 @@ func (a *App) DBGetTables(config connection.ConnectionConfig, dbName string) con
 }
 
 func (a *App) DBShowCreateTable(config connection.ConnectionConfig, dbName string, tableName string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
+		logger.Error(err, "DBShowCreateTable 获取连接失败：%s", formatConnSummary(runConfig))
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
-	sqlStr, err := dbInst.GetCreateStatement(dbName, tableName)
+	schemaName, pureTableName := normalizeSchemaAndTable(config, dbName, tableName)
+	sqlStr, err := dbInst.GetCreateStatement(schemaName, pureTableName)
 	if err != nil {
+		logger.Error(err, "DBShowCreateTable 获取建表语句失败：%s 表=%s", formatConnSummary(runConfig), tableName)
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
@@ -188,17 +208,15 @@ func (a *App) DBShowCreateTable(config connection.ConnectionConfig, dbName strin
 }
 
 func (a *App) DBGetColumns(config connection.ConnectionConfig, dbName string, tableName string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
-	columns, err := dbInst.GetColumns(dbName, tableName)
+	schemaName, pureTableName := normalizeSchemaAndTable(config, dbName, tableName)
+	columns, err := dbInst.GetColumns(schemaName, pureTableName)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
@@ -207,17 +225,15 @@ func (a *App) DBGetColumns(config connection.ConnectionConfig, dbName string, ta
 }
 
 func (a *App) DBGetIndexes(config connection.ConnectionConfig, dbName string, tableName string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
-	indexes, err := dbInst.GetIndexes(dbName, tableName)
+	schemaName, pureTableName := normalizeSchemaAndTable(config, dbName, tableName)
+	indexes, err := dbInst.GetIndexes(schemaName, pureTableName)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
@@ -226,17 +242,15 @@ func (a *App) DBGetIndexes(config connection.ConnectionConfig, dbName string, ta
 }
 
 func (a *App) DBGetForeignKeys(config connection.ConnectionConfig, dbName string, tableName string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
-	fks, err := dbInst.GetForeignKeys(dbName, tableName)
+	schemaName, pureTableName := normalizeSchemaAndTable(config, dbName, tableName)
+	fks, err := dbInst.GetForeignKeys(schemaName, pureTableName)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
@@ -245,17 +259,15 @@ func (a *App) DBGetForeignKeys(config connection.ConnectionConfig, dbName string
 }
 
 func (a *App) DBGetTriggers(config connection.ConnectionConfig, dbName string, tableName string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
-	triggers, err := dbInst.GetTriggers(dbName, tableName)
+	schemaName, pureTableName := normalizeSchemaAndTable(config, dbName, tableName)
+	triggers, err := dbInst.GetTriggers(schemaName, pureTableName)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
@@ -264,10 +276,7 @@ func (a *App) DBGetTriggers(config connection.ConnectionConfig, dbName string, t
 }
 
 func (a *App) DBGetAllColumns(config connection.ConnectionConfig, dbName string) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
@@ -280,4 +289,4 @@ func (a *App) DBGetAllColumns(config connection.ConnectionConfig, dbName string)
 	}
 
 	return connection.QueryResult{Success: true, Data: cols}
-}
+}

internal/app/methods_file.go

@@ -1,14 +1,20 @@
 package app
 
 import (
+	"bufio"
 	"encoding/csv"
 	"encoding/json"
 	"fmt"
+	"math"
 	"os"
+	"sort"
+	"strconv"
 	"strings"
+	"time"
 
 	"GoNavi-Wails/internal/connection"
 	"GoNavi-Wails/internal/db"
+	"GoNavi-Wails/internal/logger"
 
 	"github.com/wailsapp/wails/v2/pkg/runtime"
 )
@@ -134,10 +140,7 @@ func (a *App) ImportData(config connection.ConnectionConfig, dbName, tableName s
 		return connection.QueryResult{Success: true, Message: "No data to import"}
 	}
 
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
@@ -163,25 +166,20 @@ func (a *App) ImportData(config connection.ConnectionConfig, dbName, tableName s
 				values = append(values, fmt.Sprintf("'%s'", vStr))
 			}
 		}
-		
-		query := fmt.Sprintf("INSERT INTO `%s` (%s) VALUES (%s)", 
-			tableName, 
-			strings.Join(cols, ", "), 
-			strings.Join(values, ", "))
-		
-		if runConfig.Type == "postgres" {
-             pgCols := make([]string, len(cols))
-             for i, c := range cols { pgCols[i] = fmt.Sprintf("\"%s\"", c) }
-             query = fmt.Sprintf("INSERT INTO \"%s\" (%s) VALUES (%s)",
-                tableName, 
-                strings.Join(pgCols, ", "), 
-                strings.Join(values, ", "))
+		quotedCols := make([]string, len(cols))
+		for i, c := range cols {
+			quotedCols[i] = quoteIdentByType(runConfig.Type, c)
 		}
 
+		query := fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s)",
+			quoteQualifiedIdentByType(runConfig.Type, tableName),
+			strings.Join(quotedCols, ", "),
+			strings.Join(values, ", "))
+
 		_, err := dbInst.Exec(query)
 		if err != nil {
 			errCount++
-			fmt.Println("Import Error:", err)
+			logger.Error(err, "导入数据失败：表=%s", tableName)
 		} else {
 			successCount++
 		}
@@ -191,10 +189,7 @@ func (a *App) ImportData(config connection.ConnectionConfig, dbName, tableName s
 }
 
 func (a *App) ApplyChanges(config connection.ConnectionConfig, dbName, tableName string, changes connection.ChangeSet) connection.QueryResult {
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
+	runConfig := normalizeRunConfig(config, dbName)
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
@@ -222,20 +217,38 @@ func (a *App) ExportTable(config connection.ConnectionConfig, dbName string, tab
 		return connection.QueryResult{Success: false, Message: "Cancelled"}
 	}
 
-	runConfig := config
-	if dbName != "" {
-		runConfig.Database = dbName
-	}
-	
+	runConfig := normalizeRunConfig(config, dbName)
+
 dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 
-	query := fmt.Sprintf("SELECT * FROM `%s`", tableName)
-	if runConfig.Type == "postgres" {
-		query = fmt.Sprintf("SELECT * FROM \"%s\"", tableName)
+	format = strings.ToLower(format)
+	if format == "sql" {
+		f, err := os.Create(filename)
+		if err != nil {
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+		defer f.Close()
+
+		w := bufio.NewWriterSize(f, 1024*1024)
+		defer w.Flush()
+
+		if err := writeSQLHeader(w, runConfig, dbName); err != nil {
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+		if err := dumpTableSQL(w, dbInst, runConfig, dbName, tableName, true); err != nil {
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+		if err := writeSQLFooter(w, runConfig); err != nil {
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+
+		return connection.QueryResult{Success: true, Message: "Export successful"}
 	}
+
+	query := fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(runConfig.Type, tableName))
 	
 data, columns, err := dbInst.Query(query)
 	if err != nil {
@@ -247,76 +260,340 @@ data, columns, err := dbInst.Query(query)
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 	defer f.Close()
-
-	format = strings.ToLower(format)
-	var csvWriter *csv.Writer
-	var jsonEncoder *json.Encoder
-	var isJsonFirstRow = true
-
-	switch format {
-	case "csv", "xlsx":
-		f.Write([]byte{0xEF, 0xBB, 0xBF})
-		csvWriter = csv.NewWriter(f)
-		defer csvWriter.Flush()
-		if err := csvWriter.Write(columns); err != nil {
-			return connection.QueryResult{Success: false, Message: err.Error()}
-		}
-	case "json":
-		f.WriteString("[\n")
-		jsonEncoder = json.NewEncoder(f)
-		jsonEncoder.SetIndent("  ", "  ")
-	case "md":
-		fmt.Fprintf(f, "| %s |\n", strings.Join(columns, " | "))
-		seps := make([]string, len(columns))
-		for i := range seps {
-			seps[i] = "---"
-		}
-		fmt.Fprintf(f, "| %s |\n", strings.Join(seps, " | "))
-	default:
-		return connection.QueryResult{Success: false, Message: "Unsupported format: " + format}
-	}
-
-	for _, rowMap := range data {
-		record := make([]string, len(columns))
-		for i, col := range columns {
-			val := rowMap[col]
-			if val == nil {
-				record[i] = "NULL"
-			} else {
-				s := fmt.Sprintf("%v", val)
-				if format == "md" {
-					s = strings.ReplaceAll(s, "|", "\\|")
-					s = strings.ReplaceAll(s, "\n", "<br>")
-				}
-				record[i] = s
-			}
-		}
-
-		switch format {
-		case "csv", "xlsx":
-			if err := csvWriter.Write(record); err != nil {
-				return connection.QueryResult{Success: false, Message: "Write error: " + err.Error()}
-			}
-		case "json":
-			if !isJsonFirstRow {
-				f.WriteString(",\n")
-			}
-			if err := jsonEncoder.Encode(rowMap); err != nil {
-				return connection.QueryResult{Success: false, Message: "Write error: " + err.Error()}
-			}
-			isJsonFirstRow = false
-		case "md":
-			fmt.Fprintf(f, "| %s |\n", strings.Join(record, " | "))
-		}
-	}
-
-	if format == "json" {
-		f.WriteString("\n]")
+	if err := writeRowsToFile(f, data, columns, format); err != nil {
+		return connection.QueryResult{Success: false, Message: "Write error: " + err.Error()}
 	}
 
 	return connection.QueryResult{Success: true, Message: "Export successful"}
 }
 
+func (a *App) ExportTablesSQL(config connection.ConnectionConfig, dbName string, tableNames []string, includeData bool) connection.QueryResult {
+	safeDbName := strings.TrimSpace(dbName)
+	if safeDbName == "" {
+		safeDbName = "export"
+	}
+	suffix := "schema"
+	if includeData {
+		suffix = "backup"
+	}
+	defaultFilename := fmt.Sprintf("%s_%s_%dtables.sql", safeDbName, suffix, len(tableNames))
+	if len(tableNames) == 1 && strings.TrimSpace(tableNames[0]) != "" {
+		defaultFilename = fmt.Sprintf("%s_%s.sql", strings.TrimSpace(tableNames[0]), suffix)
+	}
+
+	filename, err := runtime.SaveFileDialog(a.ctx, runtime.SaveDialogOptions{
+		Title:           "Export Tables (SQL)",
+		DefaultFilename: defaultFilename,
+	})
+	if err != nil || filename == "" {
+		return connection.QueryResult{Success: false, Message: "Cancelled"}
+	}
+
+	runConfig := normalizeRunConfig(config, dbName)
+	dbInst, err := a.getDatabase(runConfig)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	tables := make([]string, 0, len(tableNames))
+	seen := make(map[string]struct{}, len(tableNames))
+	for _, t := range tableNames {
+		t = strings.TrimSpace(t)
+		if t == "" {
+			continue
+		}
+		if _, ok := seen[t]; ok {
+			continue
+		}
+		seen[t] = struct{}{}
+		tables = append(tables, t)
+	}
+	sort.Strings(tables)
+
+	f, err := os.Create(filename)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+	defer f.Close()
+
+	w := bufio.NewWriterSize(f, 1024*1024)
+	defer w.Flush()
+
+	if err := writeSQLHeader(w, runConfig, dbName); err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+	for _, t := range tables {
+		if err := dumpTableSQL(w, dbInst, runConfig, dbName, t, includeData); err != nil {
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+	}
+	if err := writeSQLFooter(w, runConfig); err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	return connection.QueryResult{Success: true, Message: "Export successful"}
+}
+
+func (a *App) ExportDatabaseSQL(config connection.ConnectionConfig, dbName string, includeData bool) connection.QueryResult {
+	safeDbName := strings.TrimSpace(dbName)
+	if safeDbName == "" {
+		return connection.QueryResult{Success: false, Message: "dbName required"}
+	}
+	suffix := "schema"
+	if includeData {
+		suffix = "backup"
+	}
+
+	filename, err := runtime.SaveFileDialog(a.ctx, runtime.SaveDialogOptions{
+		Title:           fmt.Sprintf("Export %s (SQL)", safeDbName),
+		DefaultFilename: fmt.Sprintf("%s_%s.sql", safeDbName, suffix),
+	})
+	if err != nil || filename == "" {
+		return connection.QueryResult{Success: false, Message: "Cancelled"}
+	}
+
+	runConfig := normalizeRunConfig(config, dbName)
+	dbInst, err := a.getDatabase(runConfig)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	tables, err := dbInst.GetTables(dbName)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+	sort.Strings(tables)
+
+	f, err := os.Create(filename)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+	defer f.Close()
+
+	w := bufio.NewWriterSize(f, 1024*1024)
+	defer w.Flush()
+
+	if err := writeSQLHeader(w, runConfig, dbName); err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+	for _, t := range tables {
+		if err := dumpTableSQL(w, dbInst, runConfig, dbName, t, includeData); err != nil {
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+	}
+	if err := writeSQLFooter(w, runConfig); err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	return connection.QueryResult{Success: true, Message: "Export successful"}
+}
+
+func quoteIdentByType(dbType string, ident string) string {
+	if ident == "" {
+		return ident
+	}
+
+	switch dbType {
+	case "mysql":
+		return "`" + strings.ReplaceAll(ident, "`", "``") + "`"
+	default:
+		return `"` + strings.ReplaceAll(ident, `"`, `""`) + `"`
+	}
+}
+
+func quoteQualifiedIdentByType(dbType string, ident string) string {
+	raw := strings.TrimSpace(ident)
+	if raw == "" {
+		return raw
+	}
+
+	parts := strings.Split(raw, ".")
+	if len(parts) <= 1 {
+		return quoteIdentByType(dbType, raw)
+	}
+
+	quotedParts := make([]string, 0, len(parts))
+	for _, part := range parts {
+		part = strings.TrimSpace(part)
+		if part == "" {
+			continue
+		}
+		quotedParts = append(quotedParts, quoteIdentByType(dbType, part))
+	}
+
+	if len(quotedParts) == 0 {
+		return quoteIdentByType(dbType, raw)
+	}
+	return strings.Join(quotedParts, ".")
+}
+
+func writeSQLHeader(w *bufio.Writer, config connection.ConnectionConfig, dbName string) error {
+	now := time.Now().Format("2006-01-02 15:04:05")
+	if _, err := w.WriteString(fmt.Sprintf("-- GoNavi SQL Export\n-- Time: %s\n", now)); err != nil {
+		return err
+	}
+	if strings.TrimSpace(dbName) != "" {
+		if _, err := w.WriteString(fmt.Sprintf("-- Database: %s\n\n", dbName)); err != nil {
+			return err
+		}
+	}
+
+	if strings.ToLower(strings.TrimSpace(config.Type)) == "mysql" && strings.TrimSpace(dbName) != "" {
+		if _, err := w.WriteString(fmt.Sprintf("USE %s;\n\n", quoteIdentByType("mysql", dbName))); err != nil {
+			return err
+		}
+		if _, err := w.WriteString("SET FOREIGN_KEY_CHECKS=0;\n\n"); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func writeSQLFooter(w *bufio.Writer, config connection.ConnectionConfig) error {
+	if strings.ToLower(strings.TrimSpace(config.Type)) == "mysql" {
+		if _, err := w.WriteString("\nSET FOREIGN_KEY_CHECKS=1;\n"); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func qualifyTable(schemaName, tableName string) string {
+	schemaName = strings.TrimSpace(schemaName)
+	tableName = strings.TrimSpace(tableName)
+	if schemaName == "" {
+		return tableName
+	}
+	return schemaName + "." + tableName
+}
+
+func ensureSQLTerminator(sql string) string {
+	trimmed := strings.TrimSpace(sql)
+	if trimmed == "" {
+		return sql
+	}
+	if strings.HasSuffix(trimmed, ";") {
+		return sql
+	}
+	return sql + ";"
+}
+
+func isMySQLHexLiteral(s string) bool {
+	if len(s) < 3 || !(strings.HasPrefix(s, "0x") || strings.HasPrefix(s, "0X")) {
+		return false
+	}
+	for i := 2; i < len(s); i++ {
+		c := s[i]
+		if !((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')) {
+			return false
+		}
+	}
+	return true
+}
+
+func formatSQLValue(dbType string, v interface{}) string {
+	if v == nil {
+		return "NULL"
+	}
+
+	switch val := v.(type) {
+	case bool:
+		if val {
+			return "1"
+		}
+		return "0"
+	case int:
+		return strconv.Itoa(val)
+	case int8, int16, int32, int64:
+		return fmt.Sprintf("%d", val)
+	case uint, uint8, uint16, uint32, uint64:
+		return fmt.Sprintf("%d", val)
+	case float32:
+		f := float64(val)
+		if math.IsNaN(f) || math.IsInf(f, 0) {
+			return "NULL"
+		}
+		return strconv.FormatFloat(f, 'f', -1, 32)
+	case float64:
+		if math.IsNaN(val) || math.IsInf(val, 0) {
+			return "NULL"
+		}
+		return strconv.FormatFloat(val, 'f', -1, 64)
+	case time.Time:
+		return "'" + val.Format("2006-01-02 15:04:05") + "'"
+	case string:
+		if strings.ToLower(strings.TrimSpace(dbType)) == "mysql" && isMySQLHexLiteral(val) {
+			return val
+		}
+		escaped := strings.ReplaceAll(val, "'", "''")
+		return "'" + escaped + "'"
+	default:
+		escaped := strings.ReplaceAll(fmt.Sprintf("%v", v), "'", "''")
+		return "'" + escaped + "'"
+	}
+}
+
+func dumpTableSQL(w *bufio.Writer, dbInst db.Database, config connection.ConnectionConfig, dbName, tableName string, includeData bool) error {
+	schemaName, pureTableName := normalizeSchemaAndTable(config, dbName, tableName)
+
+	if _, err := w.WriteString("\n-- ----------------------------\n"); err != nil {
+		return err
+	}
+	if _, err := w.WriteString(fmt.Sprintf("-- Table: %s\n", qualifyTable(schemaName, pureTableName))); err != nil {
+		return err
+	}
+	if _, err := w.WriteString("-- ----------------------------\n\n"); err != nil {
+		return err
+	}
+
+	createSQL, err := dbInst.GetCreateStatement(schemaName, pureTableName)
+	if err != nil {
+		return err
+	}
+	if _, err := w.WriteString(ensureSQLTerminator(createSQL)); err != nil {
+		return err
+	}
+	if _, err := w.WriteString("\n\n"); err != nil {
+		return err
+	}
+
+	if !includeData {
+		return nil
+	}
+
+	qualified := qualifyTable(schemaName, pureTableName)
+	selectSQL := fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.Type, qualified))
+	data, columns, err := dbInst.Query(selectSQL)
+	if err != nil {
+		return err
+	}
+	if len(data) == 0 {
+		if _, err := w.WriteString("-- (0 rows)\n"); err != nil {
+			return err
+		}
+		return nil
+	}
+
+	quotedCols := make([]string, 0, len(columns))
+	for _, c := range columns {
+		quotedCols = append(quotedCols, quoteIdentByType(config.Type, c))
+	}
+	quotedTable := quoteQualifiedIdentByType(config.Type, qualified)
+
+	for _, row := range data {
+		values := make([]string, 0, len(columns))
+		for _, c := range columns {
+			values = append(values, formatSQLValue(config.Type, row[c]))
+		}
+		if _, err := w.WriteString(fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s);\n", quotedTable, strings.Join(quotedCols, ", "), strings.Join(values, ", "))); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // ExportData exports provided data to a file
 func (a *App) ExportData(data []map[string]interface{}, columns []string, defaultName string, format string) connection.QueryResult {
 	if defaultName == "" {
@@ -336,33 +613,101 @@ func (a *App) ExportData(data []map[string]interface{}, columns []string, defaul
 		return connection.QueryResult{Success: false, Message: err.Error()}
 	}
 	defer f.Close()
+	if err := writeRowsToFile(f, data, columns, format); err != nil {
+		return connection.QueryResult{Success: false, Message: "Write error: " + err.Error()}
+	}
+
+	return connection.QueryResult{Success: true, Message: "Export successful"}
+}
+
+// ExportQuery exports by executing the provided SELECT query on backend side.
+// This avoids frontend IPC payload limits when exporting very large/long-text columns (e.g. base64).
+func (a *App) ExportQuery(config connection.ConnectionConfig, dbName string, query string, defaultName string, format string) connection.QueryResult {
+	query = strings.TrimSpace(query)
+	if query == "" {
+		return connection.QueryResult{Success: false, Message: "query required"}
+	}
+
+	if defaultName == "" {
+		defaultName = "export"
+	}
+
+	filename, err := runtime.SaveFileDialog(a.ctx, runtime.SaveDialogOptions{
+		Title:           "Export Query Result",
+		DefaultFilename: fmt.Sprintf("%s.%s", defaultName, strings.ToLower(format)),
+	})
+	if err != nil || filename == "" {
+		return connection.QueryResult{Success: false, Message: "Cancelled"}
+	}
+
+	runConfig := normalizeRunConfig(config, dbName)
+	dbInst, err := a.getDatabase(runConfig)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	query = sanitizeSQLForPgLike(runConfig.Type, query)
+	lowerQuery := strings.ToLower(strings.TrimSpace(query))
+	if !(strings.HasPrefix(lowerQuery, "select") || strings.HasPrefix(lowerQuery, "with")) {
+		return connection.QueryResult{Success: false, Message: "Only SELECT/WITH queries are supported"}
+	}
+
+	data, columns, err := dbInst.Query(query)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	f, err := os.Create(filename)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+	defer f.Close()
+
+	if err := writeRowsToFile(f, data, columns, format); err != nil {
+		return connection.QueryResult{Success: false, Message: "Write error: " + err.Error()}
+	}
+
+	return connection.QueryResult{Success: true, Message: "Export successful"}
+}
+
+func writeRowsToFile(f *os.File, data []map[string]interface{}, columns []string, format string) error {
+	format = strings.ToLower(strings.TrimSpace(format))
+	if f == nil {
+		return fmt.Errorf("file required")
+	}
 
-	format = strings.ToLower(format)
 	var csvWriter *csv.Writer
 	var jsonEncoder *json.Encoder
-	var isJsonFirstRow = true
+	isJsonFirstRow := true
 
 	switch format {
 	case "csv", "xlsx":
-		f.Write([]byte{0xEF, 0xBB, 0xBF})
+		if _, err := f.Write([]byte{0xEF, 0xBB, 0xBF}); err != nil {
+			return err
+		}
 		csvWriter = csv.NewWriter(f)
-		defer csvWriter.Flush()
 		if err := csvWriter.Write(columns); err != nil {
-			return connection.QueryResult{Success: false, Message: err.Error()}
+			return err
 		}
 	case "json":
-		f.WriteString("[\n")
+		if _, err := f.WriteString("[\n"); err != nil {
+			return err
+		}
 		jsonEncoder = json.NewEncoder(f)
 		jsonEncoder.SetIndent("  ", "  ")
 	case "md":
-		fmt.Fprintf(f, "| %s |\n", strings.Join(columns, " | "))
+		if _, err := fmt.Fprintf(f, "| %s |\n", strings.Join(columns, " | ")); err != nil {
+			return err
+		}
 		seps := make([]string, len(columns))
 		for i := range seps {
 			seps[i] = "---"
 		}
-		fmt.Fprintf(f, "| %s |\n", strings.Join(seps, " | "))
+		if _, err := fmt.Fprintf(f, "| %s |\n", strings.Join(seps, " | ")); err != nil {
+			return err
+		}
 	default:
-		return connection.QueryResult{Success: false, Message: "Unsupported format: " + format}
+		return fmt.Errorf("unsupported format: %s", format)
 	}
 
 	for _, rowMap := range data {
@@ -371,37 +716,51 @@ func (a *App) ExportData(data []map[string]interface{}, columns []string, defaul
 			val := rowMap[col]
 			if val == nil {
 				record[i] = "NULL"
-			} else {
-				s := fmt.Sprintf("%v", val)
-				if format == "md" {
-					s = strings.ReplaceAll(s, "|", "\\|")
-					s = strings.ReplaceAll(s, "\n", "<br>")
-				}
-				record[i] = s
+				continue
 			}
+
+			s := fmt.Sprintf("%v", val)
+			if format == "md" {
+				s = strings.ReplaceAll(s, "|", "\\|")
+				s = strings.ReplaceAll(s, "\n", "<br>")
+			}
+			record[i] = s
 		}
 
 		switch format {
 		case "csv", "xlsx":
 			if err := csvWriter.Write(record); err != nil {
-				return connection.QueryResult{Success: false, Message: "Write error: " + err.Error()}
+				return err
 			}
 		case "json":
 			if !isJsonFirstRow {
-				f.WriteString(",\n")
+				if _, err := f.WriteString(",\n"); err != nil {
+					return err
+				}
 			}
 			if err := jsonEncoder.Encode(rowMap); err != nil {
-				return connection.QueryResult{Success: false, Message: "Write error: " + err.Error()}
+				return err
 			}
 			isJsonFirstRow = false
 		case "md":
-			fmt.Fprintf(f, "| %s |\n", strings.Join(record, " | "))
+			if _, err := fmt.Fprintf(f, "| %s |\n", strings.Join(record, " | ")); err != nil {
+				return err
+			}
+		}
+	}
+
+	if format == "csv" || format == "xlsx" {
+		csvWriter.Flush()
+		if err := csvWriter.Error(); err != nil {
+			return err
 		}
 	}
 
 	if format == "json" {
-		f.WriteString("\n]")
+		if _, err := f.WriteString("\n]"); err != nil {
+			return err
+		}
 	}
 
-	return connection.QueryResult{Success: true, Message: "Export successful"}
-}
+	return nil
+}

internal/app/methods_sync.go

@@ -0,0 +1,99 @@
+package app
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/sync"
+
+	"github.com/wailsapp/wails/v2/pkg/runtime"
+)
+
+// DataSync executes a data synchronization task
+func (a *App) DataSync(config sync.SyncConfig) sync.SyncResult {
+	jobID := strings.TrimSpace(config.JobID)
+	if jobID == "" {
+		jobID = fmt.Sprintf("sync-%d", time.Now().UnixNano())
+		config.JobID = jobID
+	}
+
+	reporter := sync.Reporter{
+		OnLog: func(event sync.SyncLogEvent) {
+			runtime.EventsEmit(a.ctx, sync.EventSyncLog, event)
+		},
+		OnProgress: func(event sync.SyncProgressEvent) {
+			runtime.EventsEmit(a.ctx, sync.EventSyncProgress, event)
+		},
+	}
+
+	runtime.EventsEmit(a.ctx, sync.EventSyncStart, map[string]any{
+		"jobId": jobID,
+		"total": len(config.Tables),
+	})
+
+	engine := sync.NewSyncEngine(reporter)
+	res := engine.RunSync(config)
+
+	runtime.EventsEmit(a.ctx, sync.EventSyncDone, map[string]any{
+		"jobId":  jobID,
+		"result": res,
+	})
+
+	return res
+}
+
+// DataSyncAnalyze analyzes differences between source and target for the given tables (dry-run).
+func (a *App) DataSyncAnalyze(config sync.SyncConfig) connection.QueryResult {
+	jobID := strings.TrimSpace(config.JobID)
+	if jobID == "" {
+		jobID = fmt.Sprintf("analyze-%d", time.Now().UnixNano())
+		config.JobID = jobID
+	}
+
+	reporter := sync.Reporter{
+		OnLog: func(event sync.SyncLogEvent) {
+			runtime.EventsEmit(a.ctx, sync.EventSyncLog, event)
+		},
+		OnProgress: func(event sync.SyncProgressEvent) {
+			runtime.EventsEmit(a.ctx, sync.EventSyncProgress, event)
+		},
+	}
+
+	runtime.EventsEmit(a.ctx, sync.EventSyncStart, map[string]any{
+		"jobId": jobID,
+		"total": len(config.Tables),
+		"type":  "analyze",
+	})
+
+	engine := sync.NewSyncEngine(reporter)
+	res := engine.Analyze(config)
+
+	runtime.EventsEmit(a.ctx, sync.EventSyncDone, map[string]any{
+		"jobId":  jobID,
+		"result": res,
+		"type":   "analyze",
+	})
+
+	if !res.Success {
+		return connection.QueryResult{Success: false, Message: res.Message, Data: res}
+	}
+	return connection.QueryResult{Success: true, Message: res.Message, Data: res}
+}
+
+// DataSyncPreview returns a limited preview of diff rows for one table.
+func (a *App) DataSyncPreview(config sync.SyncConfig, tableName string, limit int) connection.QueryResult {
+	jobID := strings.TrimSpace(config.JobID)
+	if jobID == "" {
+		jobID = fmt.Sprintf("preview-%d", time.Now().UnixNano())
+		config.JobID = jobID
+	}
+
+	engine := sync.NewSyncEngine(sync.Reporter{})
+	preview, err := engine.Preview(config, tableName, limit)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+	return connection.QueryResult{Success: true, Message: "OK", Data: preview}
+}

internal/app/sql_sanitize.go

@@ -0,0 +1,236 @@
+package app
+
+import (
+	"strings"
+	"unicode"
+)
+
+func sanitizeSQLForPgLike(dbType string, query string) string {
+	switch strings.ToLower(strings.TrimSpace(dbType)) {
+	case "postgres", "kingbase":
+		// 有些情况下会出现多层重复引用（例如 """"schema"""" 或 ""schema"""），单次修复不一定收敛。
+		// 这里做有限次数的迭代，直到输出不再变化。
+		out := query
+		for i := 0; i < 3; i++ {
+			fixed := fixBrokenDoubleDoubleQuotedIdent(out)
+			if fixed == out {
+				break
+			}
+			out = fixed
+		}
+		return out
+	default:
+		return query
+	}
+}
+
+// fixBrokenDoubleDoubleQuotedIdent fixes accidental identifiers like:
+//
+//	SELECT * FROM ""schema"".""table""
+//
+// which can be produced when a quoted identifier gets wrapped by quotes again.
+//
+// It is intentionally conservative:
+// - only runs outside strings/comments/dollar-quoted blocks
+// - does not touch valid escaped-quote sequences inside quoted identifiers (e.g. "a""b")
+func fixBrokenDoubleDoubleQuotedIdent(query string) string {
+	if !strings.Contains(query, `""`) {
+		return query
+	}
+
+	var b strings.Builder
+	b.Grow(len(query))
+
+	inSingle := false
+	inDoubleIdent := false
+	inLineComment := false
+	inBlockComment := false
+	dollarTag := ""
+
+	for i := 0; i < len(query); i++ {
+		ch := query[i]
+		next := byte(0)
+		if i+1 < len(query) {
+			next = query[i+1]
+		}
+
+		if inLineComment {
+			b.WriteByte(ch)
+			if ch == '\n' {
+				inLineComment = false
+			}
+			continue
+		}
+		if inBlockComment {
+			b.WriteByte(ch)
+			if ch == '*' && next == '/' {
+				b.WriteByte('/')
+				i++
+				inBlockComment = false
+			}
+			continue
+		}
+		if dollarTag != "" {
+			if strings.HasPrefix(query[i:], dollarTag) {
+				b.WriteString(dollarTag)
+				i += len(dollarTag) - 1
+				dollarTag = ""
+				continue
+			}
+			b.WriteByte(ch)
+			continue
+		}
+		if inSingle {
+			b.WriteByte(ch)
+			if ch == '\'' {
+				// escaped single quote
+				if next == '\'' {
+					b.WriteByte('\'')
+					i++
+					continue
+				}
+				inSingle = false
+			}
+			continue
+		}
+		if inDoubleIdent {
+			b.WriteByte(ch)
+			if ch == '"' {
+				// escaped quote inside identifier
+				if next == '"' {
+					b.WriteByte('"')
+					i++
+					continue
+				}
+				inDoubleIdent = false
+			}
+			continue
+		}
+
+		// --- Outside of all string/comment blocks ---
+		if ch == '-' && next == '-' {
+			b.WriteByte(ch)
+			b.WriteByte('-')
+			i++
+			inLineComment = true
+			continue
+		}
+		if ch == '/' && next == '*' {
+			b.WriteByte(ch)
+			b.WriteByte('*')
+			i++
+			inBlockComment = true
+			continue
+		}
+		if ch == '\'' {
+			b.WriteByte(ch)
+			inSingle = true
+			continue
+		}
+		if ch == '$' {
+			if tag := parseDollarTag(query[i:]); tag != "" {
+				b.WriteString(tag)
+				i += len(tag) - 1
+				dollarTag = tag
+				continue
+			}
+		}
+
+		if ch == '"' {
+			// Fix: ""ident"" -> "ident" (only when it looks like a plain identifier)
+			// Also handle variants like ""ident""" / """"ident"""" (extra quotes at either side).
+			if next == '"' {
+				if replacement, advance, ok := tryFixDoubleDoubleQuotedIdent(query, i); ok {
+					b.WriteString(replacement)
+					i = advance - 1
+					continue
+				}
+			}
+
+			b.WriteByte(ch)
+			inDoubleIdent = true
+			continue
+		}
+
+		b.WriteByte(ch)
+	}
+
+	return b.String()
+}
+
+func tryFixDoubleDoubleQuotedIdent(query string, start int) (replacement string, advance int, ok bool) {
+	// start points at the first quote of a broken identifier, usually like:
+	//   ""ident""  / ""ident""" / """"ident""""
+	if start < 0 || start+1 >= len(query) {
+		return "", 0, false
+	}
+	if query[start] != '"' || query[start+1] != '"' {
+		return "", 0, false
+	}
+	if start > 0 && query[start-1] == '"' {
+		return "", 0, false
+	}
+
+	runLen := 0
+	for start+runLen < len(query) && query[start+runLen] == '"' {
+		runLen++
+	}
+	if runLen < 2 || runLen%2 == 1 {
+		// Odd run (e.g. """...) can be a valid quoted identifier with escaped quotes.
+		return "", 0, false
+	}
+
+	contentStart := start + runLen
+	j := contentStart
+	for j < len(query) {
+		if query[j] == '"' {
+			endRunLen := 0
+			for j+endRunLen < len(query) && query[j+endRunLen] == '"' {
+				endRunLen++
+			}
+			if endRunLen >= 2 {
+				content := strings.TrimSpace(query[contentStart:j])
+				if looksLikeIdentifierContent(content) {
+					return `"` + content + `"`, j + endRunLen, true
+				}
+				return "", 0, false
+			}
+		}
+		// Fast abort: identifier-like content should not span lines.
+		if query[j] == '\n' || query[j] == '\r' {
+			break
+		}
+		j++
+	}
+	return "", 0, false
+}
+
+func looksLikeIdentifierContent(s string) bool {
+	if strings.TrimSpace(s) == "" {
+		return false
+	}
+	for _, r := range s {
+		if r == '_' || r == '$' || r == '-' || unicode.IsLetter(r) || unicode.IsDigit(r) {
+			continue
+		}
+		return false
+	}
+	return true
+}
+
+func parseDollarTag(s string) string {
+	// Match: $tag$ where tag is [A-Za-z0-9_]* (can be empty => $$)
+	if len(s) < 2 || s[0] != '$' {
+		return ""
+	}
+	for i := 1; i < len(s); i++ {
+		c := s[i]
+		if c == '$' {
+			return s[:i+1]
+		}
+		if !((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '_') {
+			return ""
+		}
+	}
+	return ""
+}

internal/app/sql_sanitize_test.go

@@ -0,0 +1,55 @@
+package app
+
+import "testing"
+
+func TestSanitizeSQLForPgLike_FixesBrokenDoubleDoubleQuotes(t *testing.T) {
+	in := `SELECT * FROM ""ldf_server"".""t_user"" LIMIT 1`
+	out := sanitizeSQLForPgLike("kingbase", in)
+	want := `SELECT * FROM "ldf_server"."t_user" LIMIT 1`
+	if out != want {
+		t.Fatalf("unexpected sanitize output:\nIN:   %s\nOUT:  %s\nWANT: %s", in, out, want)
+	}
+}
+
+func TestSanitizeSQLForPgLike_FixesBrokenDoubleDoubleQuotes_WithExtraQuotes(t *testing.T) {
+	in := `SELECT * FROM ""ldf_server""".""t_user"" LIMIT 1`
+	out := sanitizeSQLForPgLike("kingbase", in)
+	want := `SELECT * FROM "ldf_server"."t_user" LIMIT 1`
+	if out != want {
+		t.Fatalf("unexpected sanitize output:\nIN:   %s\nOUT:  %s\nWANT: %s", in, out, want)
+	}
+}
+
+func TestSanitizeSQLForPgLike_FixesBrokenDoubleDoubleQuotes_WithQuadQuotes(t *testing.T) {
+	in := `SELECT * FROM """"ldf_server"""".""t_user"" LIMIT 1`
+	out := sanitizeSQLForPgLike("kingbase", in)
+	want := `SELECT * FROM "ldf_server"."t_user" LIMIT 1`
+	if out != want {
+		t.Fatalf("unexpected sanitize output:\nIN:   %s\nOUT:  %s\nWANT: %s", in, out, want)
+	}
+}
+
+func TestSanitizeSQLForPgLike_DoesNotTouchEscapedQuotesInsideIdentifier(t *testing.T) {
+	in := `SELECT "a""b" FROM "t""x"`
+	out := sanitizeSQLForPgLike("postgres", in)
+	if out != in {
+		t.Fatalf("should keep valid escaped quotes inside identifier:\nIN:  %s\nOUT: %s", in, out)
+	}
+}
+
+func TestSanitizeSQLForPgLike_DoesNotTouchDollarQuotedStrings(t *testing.T) {
+	in := "SELECT $$\"\"ldf_server\"\"$$, \"\"ldf_server\"\""
+	out := sanitizeSQLForPgLike("postgres", in)
+	want := "SELECT $$\"\"ldf_server\"\"$$, \"ldf_server\""
+	if out != want {
+		t.Fatalf("unexpected sanitize output for dollar quoted string:\nIN:   %s\nOUT:  %s\nWANT: %s", in, out, want)
+	}
+}
+
+func TestSanitizeSQLForPgLike_DoesNotModifyOtherDBTypes(t *testing.T) {
+	in := `SELECT * FROM ""ldf_server""`
+	out := sanitizeSQLForPgLike("mysql", in)
+	if out != in {
+		t.Fatalf("non-PG-like db should not be sanitized:\nIN:  %s\nOUT: %s", in, out)
+	}
+}

internal/connection/types.go

@@ -19,14 +19,17 @@ type ConnectionConfig struct {
 	Database string    `json:"database"`
 	UseSSH   bool      `json:"useSSH"`
 	SSH      SSHConfig `json:"ssh"`
+	Driver   string    `json:"driver,omitempty"` // For custom connection
+	DSN      string    `json:"dsn,omitempty"`    // For custom connection
+	Timeout  int       `json:"timeout,omitempty"` // Connection timeout in seconds (default: 30)
 }
 
 // QueryResult is the standard response format for Wails methods
 type QueryResult struct {
-	Success bool                   `json:"success"`
-	Message string                 `json:"message"`
-	Data    interface{}            `json:"data"`
-	Fields  []string               `json:"fields,omitempty"`
+	Success bool        `json:"success"`
+	Message string      `json:"message"`
+	Data    interface{} `json:"data"`
+	Fields  []string    `json:"fields,omitempty"`
 }
 
 // ColumnDefinition represents a table column
@@ -36,7 +39,7 @@ type ColumnDefinition struct {
 	Nullable string  `json:"nullable"` // YES/NO
 	Key      string  `json:"key"`      // PRI, UNI, MUL
 	Default  *string `json:"default"`
-	Extra    string  `json:"extra"`    // auto_increment
+	Extra    string  `json:"extra"` // auto_increment
 	Comment  string  `json:"comment"`
 }
 

internal/db/custom_impl.go

@@ -0,0 +1,256 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/utils"
+)
+
+type CustomDB struct {
+	conn        *sql.DB
+	driver      string
+	pingTimeout time.Duration
+}
+
+func (c *CustomDB) Connect(config connection.ConnectionConfig) error {
+	if config.Driver == "" || config.DSN == "" {
+		return fmt.Errorf("driver and dsn are required for custom connection")
+	}
+
+	// Verify driver is registered (implicit check by sql.Open)
+	// We might not need explicit check, sql.Open will fail or Ping will fail if driver not found.
+
+	db, err := sql.Open(config.Driver, config.DSN)
+	if err != nil {
+		return fmt.Errorf("打开数据库连接失败：%w", err)
+	}
+	c.conn = db
+	c.driver = config.Driver
+	c.pingTimeout = getConnectTimeout(config)
+	if err := c.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
+	return nil
+}
+
+func (c *CustomDB) Close() error {
+	if c.conn != nil {
+		return c.conn.Close()
+	}
+	return nil
+}
+
+func (c *CustomDB) Ping() error {
+	if c.conn == nil {
+		return fmt.Errorf("connection not open")
+	}
+	timeout := c.pingTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	ctx, cancel := utils.ContextWithTimeout(timeout)
+	defer cancel()
+	return c.conn.PingContext(ctx)
+}
+
+func (c *CustomDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	if c.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := c.conn.QueryContext(ctx, query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+
+	return scanRows(rows)
+}
+
+func (c *CustomDB) Query(query string) ([]map[string]interface{}, []string, error) {
+	if c.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := c.conn.Query(query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+	return scanRows(rows)
+}
+
+func (c *CustomDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	if c.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := c.conn.ExecContext(ctx, query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (c *CustomDB) Exec(query string) (int64, error) {
+	if c.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := c.conn.Exec(query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (c *CustomDB) GetDatabases() ([]string, error) {
+	// Try standard information_schema or some known patterns if we can't guess
+	// For "custom", we can't easily know.
+	// But many DBs support SHOW DATABASES or SELECT datname FROM pg_database
+	// We'll try a generic query or return empty.
+	// Users using custom might know their DB context is single.
+
+	// Best effort:
+	return []string{}, nil
+}
+
+func (c *CustomDB) GetTables(dbName string) ([]string, error) {
+	// ANSI Standard
+	query := "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'"
+	// If mysql-like
+	if c.driver == "mysql" {
+		query = "SHOW TABLES"
+		if dbName != "" {
+			query = fmt.Sprintf("SHOW TABLES FROM `%s`", dbName)
+		}
+	} else if c.driver == "postgres" || c.driver == "kingbase" {
+		query = `
+			SELECT table_schema AS schemaname, table_name AS tablename
+			FROM information_schema.tables
+			WHERE table_type = 'BASE TABLE'
+			  AND table_schema NOT IN ('pg_catalog', 'information_schema')`
+		if dbName != "" {
+			query += fmt.Sprintf(" AND table_schema = '%s'", dbName)
+		}
+		query += " ORDER BY table_schema, table_name"
+	} else if c.driver == "sqlite" {
+		query = "SELECT name FROM sqlite_master WHERE type='table'"
+	} else if c.driver == "oracle" || c.driver == "dm" {
+		query = "SELECT table_name FROM user_tables"
+		if dbName != "" {
+			query = fmt.Sprintf("SELECT owner, table_name FROM all_tables WHERE owner = '%s' ORDER BY table_name", strings.ToUpper(dbName))
+		}
+	}
+
+	// Fallback generic execution
+	data, _, err := c.Query(query)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get tables for custom driver %s: %v", c.driver, err)
+	}
+
+	var tables []string
+	for _, row := range data {
+		if schema, okSchema := row["schemaname"]; okSchema {
+			if name, okName := row["tablename"]; okName {
+				tables = append(tables, fmt.Sprintf("%v.%v", schema, name))
+				continue
+			}
+		}
+		if owner, okOwner := row["OWNER"]; okOwner {
+			if name, okName := row["TABLE_NAME"]; okName {
+				tables = append(tables, fmt.Sprintf("%v.%v", owner, name))
+				continue
+			}
+		}
+		// iterate keys to find likely column
+		for k, v := range row {
+			if strings.Contains(strings.ToLower(k), "name") || strings.Contains(strings.ToLower(k), "table") {
+				tables = append(tables, fmt.Sprintf("%v", v))
+				break
+			}
+		}
+	}
+	return tables, nil
+}
+
+func (c *CustomDB) GetCreateStatement(dbName, tableName string) (string, error) {
+	return "Not supported for custom connections yet", nil
+}
+
+func (c *CustomDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
+	// ANSI Standard
+	// SELECT column_name, data_type, is_nullable, column_default FROM information_schema.columns WHERE table_name = '...'
+
+	schema := "public"
+	if dbName != "" {
+		schema = dbName
+	}
+
+	query := fmt.Sprintf(`SELECT column_name, data_type, is_nullable, column_default 
+		FROM information_schema.columns 
+		WHERE table_name = '%s'`, tableName)
+
+	// Adjust for schema if likely supported
+	if c.driver == "postgres" || c.driver == "kingbase" {
+		query += fmt.Sprintf(" AND table_schema = '%s'", schema)
+	} else if c.driver == "mysql" {
+		query = fmt.Sprintf("SHOW FULL COLUMNS FROM `%s`", tableName)
+		if dbName != "" {
+			query = fmt.Sprintf("SHOW FULL COLUMNS FROM `%s`.`%s`", dbName, tableName)
+		}
+	}
+
+	data, _, err := c.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var columns []connection.ColumnDefinition
+	for _, row := range data {
+		col := connection.ColumnDefinition{}
+		// flexible mapping
+		for k, v := range row {
+			kl := strings.ToLower(k)
+			val := fmt.Sprintf("%v", v)
+			if strings.Contains(kl, "field") || strings.Contains(kl, "column_name") {
+				col.Name = val
+			} else if strings.Contains(kl, "type") {
+				col.Type = val
+			} else if strings.Contains(kl, "null") || strings.Contains(kl, "nullable") {
+				col.Nullable = val
+			} else if strings.Contains(kl, "default") {
+				col.Default = &val
+			} else if strings.Contains(kl, "key") {
+				col.Key = val
+			} else if strings.Contains(kl, "comment") {
+				col.Comment = val
+			}
+		}
+		columns = append(columns, col)
+	}
+	return columns, nil
+}
+
+func (c *CustomDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
+	return nil, fmt.Errorf("not implemented for custom")
+}
+
+func (c *CustomDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
+	return nil, fmt.Errorf("not implemented for custom")
+}
+
+func (c *CustomDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
+	return nil, fmt.Errorf("not implemented for custom")
+}
+
+func (c *CustomDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+	return fmt.Errorf("read-only mode for custom")
+}
+
+func (c *CustomDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
+	return nil, fmt.Errorf("not implemented for custom")
+}

internal/db/dameng_impl.go

@@ -0,0 +1,399 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"net"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
+	"GoNavi-Wails/internal/ssh"
+	"GoNavi-Wails/internal/utils"
+
+	_ "gitee.com/chunanyong/dm"
+)
+
+type DamengDB struct {
+	conn        *sql.DB
+	pingTimeout time.Duration
+	forwarder   *ssh.LocalForwarder // Store SSH tunnel forwarder
+}
+
+func (d *DamengDB) getDSN(config connection.ConnectionConfig) string {
+	// dm://user:password@host:port?schema=...
+	// or dm://user:password@host:port
+
+	address := net.JoinHostPort(config.Host, strconv.Itoa(config.Port))
+	escapedPassword := url.PathEscape(config.Password)
+	q := url.Values{}
+	if config.Database != "" {
+		q.Set("schema", config.Database)
+	}
+	if escapedPassword != config.Password {
+		// 达梦驱动要求：密码包含特殊字符时，password 需 PathEscape，并添加 escapeProcess=true 让驱动解码。
+		q.Set("escapeProcess", "true")
+	}
+
+	dsn := fmt.Sprintf("dm://%s:%s@%s", config.User, escapedPassword, address)
+	encoded := q.Encode()
+	if encoded == "" {
+		return dsn
+	}
+	return dsn + "?" + encoded
+}
+
+func (d *DamengDB) Connect(config connection.ConnectionConfig) error {
+	var dsn string
+	var err error
+
+	if config.UseSSH {
+		// Create SSH tunnel with local port forwarding
+		logger.Infof("达梦数据库使用 SSH 连接：地址=%s:%d 用户=%s", config.Host, config.Port, config.User)
+
+		forwarder, err := ssh.GetOrCreateLocalForwarder(config.SSH, config.Host, config.Port)
+		if err != nil {
+			return fmt.Errorf("创建 SSH 隧道失败：%w", err)
+		}
+		d.forwarder = forwarder
+
+		// Parse local address
+		host, portStr, err := net.SplitHostPort(forwarder.LocalAddr)
+		if err != nil {
+			return fmt.Errorf("解析本地转发地址失败：%w", err)
+		}
+
+		port, err := strconv.Atoi(portStr)
+		if err != nil {
+			return fmt.Errorf("解析本地端口失败：%w", err)
+		}
+
+		// Create a modified config pointing to local forwarder
+		localConfig := config
+		localConfig.Host = host
+		localConfig.Port = port
+		localConfig.UseSSH = false
+
+		dsn = d.getDSN(localConfig)
+		logger.Infof("达梦数据库通过本地端口转发连接：%s -> %s:%d", forwarder.LocalAddr, config.Host, config.Port)
+	} else {
+		dsn = d.getDSN(config)
+	}
+
+	db, err := sql.Open("dm", dsn)
+	if err != nil {
+		return fmt.Errorf("打开数据库连接失败：%w", err)
+	}
+	d.conn = db
+	d.pingTimeout = getConnectTimeout(config)
+	if err := d.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
+	return nil
+}
+
+func (d *DamengDB) Close() error {
+	// Close SSH forwarder first if exists
+	if d.forwarder != nil {
+		if err := d.forwarder.Close(); err != nil {
+			logger.Warnf("关闭达梦数据库 SSH 端口转发失败：%v", err)
+		}
+		d.forwarder = nil
+	}
+
+	// Then close database connection
+	if d.conn != nil {
+		return d.conn.Close()
+	}
+	return nil
+}
+
+func (d *DamengDB) Ping() error {
+	if d.conn == nil {
+		return fmt.Errorf("connection not open")
+	}
+	timeout := d.pingTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	ctx, cancel := utils.ContextWithTimeout(timeout)
+	defer cancel()
+	return d.conn.PingContext(ctx)
+}
+
+func (d *DamengDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	if d.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := d.conn.QueryContext(ctx, query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+
+	return scanRows(rows)
+}
+
+func (d *DamengDB) Query(query string) ([]map[string]interface{}, []string, error) {
+	if d.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := d.conn.Query(query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+	return scanRows(rows)
+}
+
+func (d *DamengDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	if d.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := d.conn.ExecContext(ctx, query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (d *DamengDB) Exec(query string) (int64, error) {
+	if d.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := d.conn.Exec(query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (d *DamengDB) GetDatabases() ([]string, error) {
+	// DM: List Users/Schemas
+	data, _, err := d.Query("SELECT username FROM dba_users")
+	if err != nil {
+		// Fallback if dba_users not accessible
+		data, _, err = d.Query("SELECT username FROM all_users")
+		if err != nil {
+			return nil, err
+		}
+	}
+	var dbs []string
+	for _, row := range data {
+		if val, ok := row["USERNAME"]; ok {
+			dbs = append(dbs, fmt.Sprintf("%v", val))
+		}
+	}
+	return dbs, nil
+}
+
+func (d *DamengDB) GetTables(dbName string) ([]string, error) {
+	query := fmt.Sprintf("SELECT owner, table_name FROM all_tables WHERE owner = '%s' ORDER BY table_name", strings.ToUpper(dbName))
+	if dbName == "" {
+		query = "SELECT table_name FROM user_tables"
+	}
+
+	data, _, err := d.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var tables []string
+	for _, row := range data {
+		if dbName != "" {
+			if owner, okOwner := row["OWNER"]; okOwner {
+				if name, okName := row["TABLE_NAME"]; okName {
+					tables = append(tables, fmt.Sprintf("%v.%v", owner, name))
+					continue
+				}
+			}
+		}
+		if val, ok := row["TABLE_NAME"]; ok {
+			tables = append(tables, fmt.Sprintf("%v", val))
+		}
+	}
+	return tables, nil
+}
+
+func (d *DamengDB) GetCreateStatement(dbName, tableName string) (string, error) {
+	// DM: SP_TABLEDEF usually returns definition
+	// Or standard Oracle way if supported.
+	// We'll try a common DM approach.
+	// SELECT DBMS_METADATA.GET_DDL('TABLE', 'TABLE_NAME', 'OWNER') FROM DUAL;
+
+	query := fmt.Sprintf("SELECT DBMS_METADATA.GET_DDL('TABLE', '%s', '%s') as ddl FROM DUAL",
+		strings.ToUpper(tableName), strings.ToUpper(dbName))
+
+	if dbName == "" {
+		query = fmt.Sprintf("SELECT DBMS_METADATA.GET_DDL('TABLE', '%s') as ddl FROM DUAL", strings.ToUpper(tableName))
+	}
+
+	data, _, err := d.Query(query)
+	if err != nil {
+		return "", err
+	}
+
+	if len(data) > 0 {
+		if val, ok := data[0]["DDL"]; ok {
+			return fmt.Sprintf("%v", val), nil
+		}
+	}
+	return "", fmt.Errorf("create statement not found")
+}
+
+func (d *DamengDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
+	query := fmt.Sprintf(`SELECT column_name, data_type, nullable, data_default 
+		FROM all_tab_columns 
+		WHERE owner = '%s' AND table_name = '%s'`,
+		strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	if dbName == "" {
+		query = fmt.Sprintf(`SELECT column_name, data_type, nullable, data_default 
+			FROM user_tab_columns 
+			WHERE table_name = '%s'`, strings.ToUpper(tableName))
+	}
+
+	data, _, err := d.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var columns []connection.ColumnDefinition
+	for _, row := range data {
+		col := connection.ColumnDefinition{
+			Name:     fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			Type:     fmt.Sprintf("%v", row["DATA_TYPE"]),
+			Nullable: fmt.Sprintf("%v", row["NULLABLE"]),
+		}
+
+		if row["DATA_DEFAULT"] != nil {
+			def := fmt.Sprintf("%v", row["DATA_DEFAULT"])
+			col.Default = &def
+		}
+
+		columns = append(columns, col)
+	}
+	return columns, nil
+}
+
+func (d *DamengDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
+	query := fmt.Sprintf(`SELECT index_name, column_name, uniqueness 
+		FROM all_ind_columns 
+		JOIN all_indexes USING (index_name, owner) 
+		WHERE table_owner = '%s' AND table_name = '%s'`,
+		strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	if dbName == "" {
+		query = fmt.Sprintf(`SELECT index_name, column_name, uniqueness 
+			FROM user_ind_columns 
+			JOIN user_indexes USING (index_name) 
+			WHERE table_name = '%s'`, strings.ToUpper(tableName))
+	}
+
+	data, _, err := d.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var indexes []connection.IndexDefinition
+	for _, row := range data {
+		unique := 1
+		if val, ok := row["UNIQUENESS"]; ok && val == "UNIQUE" {
+			unique = 0
+		}
+
+		idx := connection.IndexDefinition{
+			Name:       fmt.Sprintf("%v", row["INDEX_NAME"]),
+			ColumnName: fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			NonUnique:  unique,
+			IndexType:  "BTREE",
+		}
+		indexes = append(indexes, idx)
+	}
+	return indexes, nil
+}
+
+func (d *DamengDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
+	// Reusing Oracle style query as DM is highly compatible
+	query := fmt.Sprintf(`SELECT a.constraint_name, a.column_name, c_pk.table_name r_table_name, b.column_name r_column_name
+		FROM all_cons_columns a
+		JOIN all_constraints c ON a.owner = c.owner AND a.constraint_name = c.constraint_name
+		JOIN all_constraints c_pk ON c.r_owner = c_pk.owner AND c.r_constraint_name = c_pk.constraint_name
+		JOIN all_cons_columns b ON c_pk.owner = b.owner AND c_pk.constraint_name = b.constraint_name AND a.position = b.position
+		WHERE c.constraint_type = 'R' AND a.owner = '%s' AND a.table_name = '%s'`,
+		strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	data, _, err := d.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var fks []connection.ForeignKeyDefinition
+	for _, row := range data {
+		fk := connection.ForeignKeyDefinition{
+			Name:           fmt.Sprintf("%v", row["CONSTRAINT_NAME"]),
+			ColumnName:     fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			RefTableName:   fmt.Sprintf("%v", row["R_TABLE_NAME"]),
+			RefColumnName:  fmt.Sprintf("%v", row["R_COLUMN_NAME"]),
+			ConstraintName: fmt.Sprintf("%v", row["CONSTRAINT_NAME"]),
+		}
+		fks = append(fks, fk)
+	}
+	return fks, nil
+}
+
+func (d *DamengDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
+	query := fmt.Sprintf(`SELECT trigger_name, trigger_type, triggering_event 
+		FROM all_triggers 
+		WHERE table_owner = '%s' AND table_name = '%s'`,
+		strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	data, _, err := d.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var triggers []connection.TriggerDefinition
+	for _, row := range data {
+		trig := connection.TriggerDefinition{
+			Name:      fmt.Sprintf("%v", row["TRIGGER_NAME"]),
+			Timing:    fmt.Sprintf("%v", row["TRIGGER_TYPE"]),
+			Event:     fmt.Sprintf("%v", row["TRIGGERING_EVENT"]),
+			Statement: "SOURCE HIDDEN",
+		}
+		triggers = append(triggers, trig)
+	}
+	return triggers, nil
+}
+
+func (d *DamengDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+	return fmt.Errorf("read-only mode implemented for Dameng so far")
+}
+
+func (d *DamengDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
+	query := fmt.Sprintf(`SELECT table_name, column_name, data_type 
+		FROM all_tab_columns 
+		WHERE owner = '%s'`, strings.ToUpper(dbName))
+
+	data, _, err := d.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var cols []connection.ColumnDefinitionWithTable
+	for _, row := range data {
+		col := connection.ColumnDefinitionWithTable{
+			TableName: fmt.Sprintf("%v", row["TABLE_NAME"]),
+			Name:      fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			Type:      fmt.Sprintf("%v", row["DATA_TYPE"]),
+		}
+		cols = append(cols, col)
+	}
+	return cols, nil
+}

internal/db/database.go

@@ -1,8 +1,8 @@
 package db
 
 import (
-	"fmt"
 	"GoNavi-Wails/internal/connection"
+	"fmt"
 )
 
 type Database interface {
@@ -34,6 +34,14 @@ func NewDatabase(dbType string) (Database, error) {
 		return &PostgresDB{}, nil
 	case "sqlite":
 		return &SQLiteDB{}, nil
+	case "oracle":
+		return &OracleDB{}, nil
+	case "dameng":
+		return &DamengDB{}, nil
+	case "kingbase":
+		return &KingbaseDB{}, nil
+	case "custom":
+		return &CustomDB{}, nil
 	default:
 		// Default to MySQL for backward compatibility if empty
 		if dbType == "" {

internal/db/dsn_test.go

@@ -0,0 +1,97 @@
+package db
+
+import (
+	"strings"
+	"testing"
+
+	"GoNavi-Wails/internal/connection"
+)
+
+func TestPostgresDSN_EscapesPassword(t *testing.T) {
+	p := &PostgresDB{}
+	cfg := connection.ConnectionConfig{
+		Type:     "postgres",
+		Host:     "127.0.0.1",
+		Port:     5432,
+		User:     "user",
+		Password: "p@ss:wo/rd",
+		Database: "db",
+	}
+
+	dsn := p.getDSN(cfg)
+	if strings.Contains(dsn, cfg.Password) {
+		t.Fatalf("dsn 包含原始密码：%s", dsn)
+	}
+	if !strings.Contains(dsn, "p%40ss%3Awo%2Frd") {
+		t.Fatalf("dsn 未正确转义密码：%s", dsn)
+	}
+	if !strings.Contains(dsn, "sslmode=disable") {
+		t.Fatalf("dsn 缺少 sslmode 参数：%s", dsn)
+	}
+}
+
+func TestOracleDSN_EscapesUserAndPassword(t *testing.T) {
+	o := &OracleDB{}
+	cfg := connection.ConnectionConfig{
+		Type:     "oracle",
+		Host:     "127.0.0.1",
+		Port:     1521,
+		User:     "u@ser",
+		Password: "p@ss:wo/rd",
+		Database: "svc/name",
+	}
+
+	dsn := o.getDSN(cfg)
+	if strings.Contains(dsn, cfg.Password) {
+		t.Fatalf("dsn 包含原始密码：%s", dsn)
+	}
+	if !strings.Contains(dsn, "u%40ser") || !strings.Contains(dsn, "p%40ss%3Awo%2Frd") {
+		t.Fatalf("dsn 未正确转义 user/password：%s", dsn)
+	}
+	if !strings.Contains(dsn, "/svc%2Fname") {
+		t.Fatalf("dsn 未正确转义 service：%s", dsn)
+	}
+}
+
+func TestDamengDSN_EscapesPasswordAndEnablesEscapeProcess(t *testing.T) {
+	d := &DamengDB{}
+	cfg := connection.ConnectionConfig{
+		Type:     "dameng",
+		Host:     "127.0.0.1",
+		Port:     5236,
+		User:     "SYSDBA",
+		Password: "p@ss:wo/rd",
+		Database: "DBName",
+	}
+
+	dsn := d.getDSN(cfg)
+	if strings.Contains(dsn, cfg.Password) {
+		t.Fatalf("dsn 包含原始密码：%s", dsn)
+	}
+	if strings.Contains(dsn, "wo/rd") || !strings.Contains(dsn, "wo%2Frd") {
+		t.Fatalf("dsn 未按达梦驱动要求转义密码（至少应转义 '/'）：%s", dsn)
+	}
+	if !strings.Contains(dsn, "escapeProcess=true") {
+		t.Fatalf("dsn 缺少 escapeProcess=true：%s", dsn)
+	}
+	if !strings.Contains(dsn, "schema=DBName") {
+		t.Fatalf("dsn 缺少 schema 参数：%s", dsn)
+	}
+}
+
+func TestKingbaseDSN_QuotesPasswordWithSpaces(t *testing.T) {
+	k := &KingbaseDB{}
+	cfg := connection.ConnectionConfig{
+		Type:     "kingbase",
+		Host:     "127.0.0.1",
+		Port:     54321,
+		User:     "system",
+		Password: "p@ss word",
+		Database: "TEST",
+	}
+
+	dsn := k.getDSN(cfg)
+	if !strings.Contains(dsn, "password='p@ss word'") {
+		t.Fatalf("dsn 未对包含空格的密码进行引号包裹：%s", dsn)
+	}
+}

internal/db/kingbase_impl.go

@@ -0,0 +1,633 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
+	"GoNavi-Wails/internal/ssh"
+	"GoNavi-Wails/internal/utils"
+
+	_ "gitea.com/kingbase/gokb" // Registers "kingbase" driver
+)
+
+type KingbaseDB struct {
+	conn        *sql.DB
+	pingTimeout time.Duration
+	forwarder   *ssh.LocalForwarder // Store SSH tunnel forwarder
+}
+
+func quoteConnValue(v string) string {
+	if v == "" {
+		return "''"
+	}
+
+	needsQuote := false
+	for _, r := range v {
+		switch r {
+		case ' ', '\t', '\n', '\r', '\v', '\f', '\'', '\\':
+			needsQuote = true
+		}
+		if needsQuote {
+			break
+		}
+	}
+	if !needsQuote {
+		return v
+	}
+
+	var b strings.Builder
+	b.Grow(len(v) + 2)
+	b.WriteByte('\'')
+	for _, r := range v {
+		if r == '\\' || r == '\'' {
+			b.WriteByte('\\')
+		}
+		b.WriteRune(r)
+	}
+	b.WriteByte('\'')
+	return b.String()
+}
+
+func (k *KingbaseDB) getDSN(config connection.ConnectionConfig) string {
+	// Kingbase DSN usually similar to Postgres:
+	// host=localhost port=54321 user=system password=... dbname=TEST sslmode=disable
+
+	address := config.Host
+	port := config.Port
+
+	// Construct DSN
+	dsn := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable connect_timeout=%d",
+		quoteConnValue(address),
+		port,
+		quoteConnValue(config.User),
+		quoteConnValue(config.Password),
+		quoteConnValue(config.Database),
+		getConnectTimeoutSeconds(config),
+	)
+
+	return dsn
+}
+
+func (k *KingbaseDB) Connect(config connection.ConnectionConfig) error {
+	var dsn string
+	var err error
+
+	if config.UseSSH {
+		// Create SSH tunnel with local port forwarding
+		logger.Infof("人大金仓使用 SSH 连接：地址=%s:%d 用户=%s", config.Host, config.Port, config.User)
+
+		forwarder, err := ssh.GetOrCreateLocalForwarder(config.SSH, config.Host, config.Port)
+		if err != nil {
+			return fmt.Errorf("创建 SSH 隧道失败：%w", err)
+		}
+		k.forwarder = forwarder
+
+		// Parse local address
+		host, portStr, err := net.SplitHostPort(forwarder.LocalAddr)
+		if err != nil {
+			return fmt.Errorf("解析本地转发地址失败：%w", err)
+		}
+
+		port, err := strconv.Atoi(portStr)
+		if err != nil {
+			return fmt.Errorf("解析本地端口失败：%w", err)
+		}
+
+		// Create a modified config pointing to local forwarder
+		localConfig := config
+		localConfig.Host = host
+		localConfig.Port = port
+		localConfig.UseSSH = false
+
+		dsn = k.getDSN(localConfig)
+		logger.Infof("人大金仓通过本地端口转发连接：%s -> %s:%d", forwarder.LocalAddr, config.Host, config.Port)
+	} else {
+		dsn = k.getDSN(config)
+	}
+
+	// Open using "kingbase" driver
+	db, err := sql.Open("kingbase", dsn)
+	if err != nil {
+		return fmt.Errorf("打开数据库连接失败：%w", err)
+	}
+	k.conn = db
+	k.pingTimeout = getConnectTimeout(config)
+	if err := k.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
+	return nil
+}
+
+func (k *KingbaseDB) Close() error {
+	// Close SSH forwarder first if exists
+	if k.forwarder != nil {
+		if err := k.forwarder.Close(); err != nil {
+			logger.Warnf("关闭人大金仓 SSH 端口转发失败：%v", err)
+		}
+		k.forwarder = nil
+	}
+
+	// Then close database connection
+	if k.conn != nil {
+		return k.conn.Close()
+	}
+	return nil
+}
+
+func (k *KingbaseDB) Ping() error {
+	if k.conn == nil {
+		return fmt.Errorf("connection not open")
+	}
+	timeout := k.pingTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	ctx, cancel := utils.ContextWithTimeout(timeout)
+	defer cancel()
+	return k.conn.PingContext(ctx)
+}
+
+func (k *KingbaseDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	if k.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := k.conn.QueryContext(ctx, query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+
+	return scanRows(rows)
+}
+
+func (k *KingbaseDB) Query(query string) ([]map[string]interface{}, []string, error) {
+	if k.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := k.conn.Query(query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+	return scanRows(rows)
+}
+
+func (k *KingbaseDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	if k.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := k.conn.ExecContext(ctx, query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (k *KingbaseDB) Exec(query string) (int64, error) {
+	if k.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := k.conn.Exec(query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (k *KingbaseDB) GetDatabases() ([]string, error) {
+	// Postgres/Kingbase style
+	data, _, err := k.Query("SELECT datname FROM pg_database WHERE datistemplate = false")
+	if err != nil {
+		return nil, err
+	}
+	var dbs []string
+	for _, row := range data {
+		if val, ok := row["datname"]; ok {
+			dbs = append(dbs, fmt.Sprintf("%v", val))
+		}
+	}
+	return dbs, nil
+}
+
+func (k *KingbaseDB) GetTables(dbName string) ([]string, error) {
+	// Kingbase: tables are scoped by the current DB connection; include schema to avoid search_path issues.
+	query := `
+		SELECT table_schema AS schemaname, table_name AS tablename
+		FROM information_schema.tables
+		WHERE table_type = 'BASE TABLE'
+		  AND table_schema NOT IN ('pg_catalog', 'information_schema')
+		  AND table_schema NOT LIKE 'pg_%'
+		ORDER BY table_schema, table_name`
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var tables []string
+	for _, row := range data {
+		schema, okSchema := row["schemaname"]
+		name, okName := row["tablename"]
+		if okSchema && okName {
+			tables = append(tables, fmt.Sprintf("%v.%v", schema, name))
+			continue
+		}
+		if val, ok := row["table_name"]; ok {
+			tables = append(tables, fmt.Sprintf("%v", val))
+		}
+	}
+	return tables, nil
+}
+
+func (k *KingbaseDB) GetCreateStatement(dbName, tableName string) (string, error) {
+	// Kingbase doesn't have "SHOW CREATE TABLE".
+	// We can try pg_dump logic or use a query to reconstruction.
+	// A simple approach is just returning basic info or "Not Supported".
+	// Or we can query information_schema to build it.
+	return "SHOW CREATE TABLE not directly supported in Kingbase/Postgres via SQL", nil
+}
+
+func (k *KingbaseDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
+	// 解析 schema.table 格式
+	schema := strings.TrimSpace(dbName)
+	table := strings.TrimSpace(tableName)
+
+	// 如果 tableName 包含 schema (格式: schema.table)
+	if parts := strings.SplitN(table, ".", 2); len(parts) == 2 {
+		parsedSchema := strings.TrimSpace(parts[0])
+		parsedTable := strings.TrimSpace(parts[1])
+		if parsedSchema != "" && parsedTable != "" {
+			schema = parsedSchema
+			table = parsedTable
+		}
+	}
+
+	// 如果仍然没有 schema,使用 current_schema()
+	// 这样可以自动匹配当前连接的 search_path
+	if schema == "" {
+		return k.getColumnsWithCurrentSchema(table)
+	}
+
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	// 转义函数:处理单引号,移除双引号
+	esc := func(s string) string {
+		// 移除前后的双引号(如果存在)
+		s = strings.Trim(s, "\"")
+		// 转义单引号
+		return strings.ReplaceAll(s, "'", "''")
+	}
+
+	query := fmt.Sprintf(`SELECT column_name, data_type, is_nullable, column_default
+		FROM information_schema.columns
+		WHERE table_schema = '%s' AND table_name = '%s'
+		ORDER BY ordinal_position`, esc(schema), esc(table))
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var columns []connection.ColumnDefinition
+	for _, row := range data {
+		col := connection.ColumnDefinition{
+			Name:     fmt.Sprintf("%v", row["column_name"]),
+			Type:     fmt.Sprintf("%v", row["data_type"]),
+			Nullable: fmt.Sprintf("%v", row["is_nullable"]),
+		}
+
+		if row["column_default"] != nil {
+			def := fmt.Sprintf("%v", row["column_default"])
+			col.Default = &def
+		}
+
+		columns = append(columns, col)
+	}
+	return columns, nil
+}
+
+// getColumnsWithCurrentSchema 使用 current_schema() 查询当前schema的表
+func (k *KingbaseDB) getColumnsWithCurrentSchema(tableName string) ([]connection.ColumnDefinition, error) {
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	// 转义函数
+	esc := func(s string) string {
+		s = strings.Trim(s, "\"")
+		return strings.ReplaceAll(s, "'", "''")
+	}
+
+	// 使用 current_schema() 获取当前schema
+	query := fmt.Sprintf(`SELECT column_name, data_type, is_nullable, column_default
+		FROM information_schema.columns
+		WHERE table_schema = current_schema() AND table_name = '%s'
+		ORDER BY ordinal_position`, esc(table))
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var columns []connection.ColumnDefinition
+	for _, row := range data {
+		col := connection.ColumnDefinition{
+			Name:     fmt.Sprintf("%v", row["column_name"]),
+			Type:     fmt.Sprintf("%v", row["data_type"]),
+			Nullable: fmt.Sprintf("%v", row["is_nullable"]),
+		}
+
+		if row["column_default"] != nil {
+			def := fmt.Sprintf("%v", row["column_default"])
+			col.Default = &def
+		}
+
+		columns = append(columns, col)
+	}
+	return columns, nil
+}
+
+func (k *KingbaseDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
+	// 解析 schema.table 格式
+	schema := strings.TrimSpace(dbName)
+	table := strings.TrimSpace(tableName)
+
+	// 如果 tableName 包含 schema (格式: schema.table)
+	if parts := strings.SplitN(table, ".", 2); len(parts) == 2 {
+		parsedSchema := strings.TrimSpace(parts[0])
+		parsedTable := strings.TrimSpace(parts[1])
+		if parsedSchema != "" && parsedTable != "" {
+			schema = parsedSchema
+			table = parsedTable
+		}
+	}
+
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	// 转义函数:处理单引号,移除双引号
+	esc := func(s string) string {
+		s = strings.Trim(s, "\"")
+		return strings.ReplaceAll(s, "'", "''")
+	}
+
+	// 构建查询：如果没有指定schema,使用current_schema()
+	var query string
+	if schema != "" {
+		query = fmt.Sprintf(`
+			SELECT
+				i.relname as index_name,
+				a.attname as column_name,
+				ix.indisunique as is_unique
+			FROM
+				pg_class t,
+				pg_class i,
+				pg_index ix,
+				pg_attribute a,
+				pg_namespace n
+			WHERE
+				t.oid = ix.indrelid
+				AND i.oid = ix.indexrelid
+				AND a.attrelid = t.oid
+				AND a.attnum = ANY(ix.indkey)
+				AND t.relkind = 'r'
+				AND t.relname = '%s'
+				AND n.oid = t.relnamespace
+				AND n.nspname = '%s'
+		`, esc(table), esc(schema))
+	} else {
+		query = fmt.Sprintf(`
+			SELECT
+				i.relname as index_name,
+				a.attname as column_name,
+				ix.indisunique as is_unique
+			FROM
+				pg_class t,
+				pg_class i,
+				pg_index ix,
+				pg_attribute a,
+				pg_namespace n
+			WHERE
+				t.oid = ix.indrelid
+				AND i.oid = ix.indexrelid
+				AND a.attrelid = t.oid
+				AND a.attnum = ANY(ix.indkey)
+				AND t.relkind = 'r'
+				AND t.relname = '%s'
+				AND n.oid = t.relnamespace
+				AND n.nspname = current_schema()
+		`, esc(table))
+	}
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var indexes []connection.IndexDefinition
+	for _, row := range data {
+		nonUnique := 1
+		if val, ok := row["is_unique"]; ok {
+			if b, ok := val.(bool); ok && b {
+				nonUnique = 0
+			}
+		}
+
+		idx := connection.IndexDefinition{
+			Name:       fmt.Sprintf("%v", row["index_name"]),
+			ColumnName: fmt.Sprintf("%v", row["column_name"]),
+			NonUnique:  nonUnique,
+			IndexType:  "BTREE", // Default
+		}
+		indexes = append(indexes, idx)
+	}
+	return indexes, nil
+}
+
+func (k *KingbaseDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
+	// 解析 schema.table 格式
+	schema := strings.TrimSpace(dbName)
+	table := strings.TrimSpace(tableName)
+
+	// 如果 tableName 包含 schema (格式: schema.table)
+	if parts := strings.SplitN(table, ".", 2); len(parts) == 2 {
+		parsedSchema := strings.TrimSpace(parts[0])
+		parsedTable := strings.TrimSpace(parts[1])
+		if parsedSchema != "" && parsedTable != "" {
+			schema = parsedSchema
+			table = parsedTable
+		}
+	}
+
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	// 转义函数:处理单引号,移除双引号
+	esc := func(s string) string {
+		s = strings.Trim(s, "\"")
+		return strings.ReplaceAll(s, "'", "''")
+	}
+
+	// 构建查询：如果没有指定schema,使用current_schema()
+	var query string
+	if schema != "" {
+		query = fmt.Sprintf(`
+			SELECT
+				tc.constraint_name,
+				kcu.column_name,
+				ccu.table_name AS foreign_table_name,
+				ccu.column_name AS foreign_column_name
+			FROM
+				information_schema.table_constraints AS tc
+				JOIN information_schema.key_column_usage AS kcu
+				  ON tc.constraint_name = kcu.constraint_name
+				  AND tc.table_schema = kcu.table_schema
+				JOIN information_schema.constraint_column_usage AS ccu
+				  ON ccu.constraint_name = tc.constraint_name
+				  AND ccu.table_schema = tc.table_schema
+			WHERE tc.constraint_type = 'FOREIGN KEY' AND tc.table_name='%s' AND tc.table_schema='%s'`,
+			esc(table), esc(schema))
+	} else {
+		query = fmt.Sprintf(`
+			SELECT
+				tc.constraint_name,
+				kcu.column_name,
+				ccu.table_name AS foreign_table_name,
+				ccu.column_name AS foreign_column_name
+			FROM
+				information_schema.table_constraints AS tc
+				JOIN information_schema.key_column_usage AS kcu
+				  ON tc.constraint_name = kcu.constraint_name
+				  AND tc.table_schema = kcu.table_schema
+				JOIN information_schema.constraint_column_usage AS ccu
+				  ON ccu.constraint_name = tc.constraint_name
+				  AND ccu.table_schema = tc.table_schema
+			WHERE tc.constraint_type = 'FOREIGN KEY' AND tc.table_name='%s' AND tc.table_schema=current_schema()`,
+			esc(table))
+	}
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var fks []connection.ForeignKeyDefinition
+	for _, row := range data {
+		fk := connection.ForeignKeyDefinition{
+			Name:           fmt.Sprintf("%v", row["constraint_name"]),
+			ColumnName:     fmt.Sprintf("%v", row["column_name"]),
+			RefTableName:   fmt.Sprintf("%v", row["foreign_table_name"]),
+			RefColumnName:  fmt.Sprintf("%v", row["foreign_column_name"]),
+			ConstraintName: fmt.Sprintf("%v", row["constraint_name"]),
+		}
+		fks = append(fks, fk)
+	}
+	return fks, nil
+}
+
+func (k *KingbaseDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
+	// 解析 schema.table 格式
+	schema := strings.TrimSpace(dbName)
+	table := strings.TrimSpace(tableName)
+
+	// 如果 tableName 包含 schema (格式: schema.table)
+	if parts := strings.SplitN(table, ".", 2); len(parts) == 2 {
+		parsedSchema := strings.TrimSpace(parts[0])
+		parsedTable := strings.TrimSpace(parts[1])
+		if parsedSchema != "" && parsedTable != "" {
+			schema = parsedSchema
+			table = parsedTable
+		}
+	}
+
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	// 转义函数:处理单引号,移除双引号
+	esc := func(s string) string {
+		s = strings.Trim(s, "\"")
+		return strings.ReplaceAll(s, "'", "''")
+	}
+
+	// 构建查询：如果指定了schema,也加上schema条件
+	var query string
+	if schema != "" {
+		query = fmt.Sprintf(`SELECT trigger_name, action_timing, event_manipulation
+			FROM information_schema.triggers
+			WHERE event_object_table = '%s' AND event_object_schema = '%s'`,
+			esc(table), esc(schema))
+	} else {
+		query = fmt.Sprintf(`SELECT trigger_name, action_timing, event_manipulation
+			FROM information_schema.triggers
+			WHERE event_object_table = '%s' AND event_object_schema = current_schema()`,
+			esc(table))
+	}
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var triggers []connection.TriggerDefinition
+	for _, row := range data {
+		trig := connection.TriggerDefinition{
+			Name:      fmt.Sprintf("%v", row["trigger_name"]),
+			Timing:    fmt.Sprintf("%v", row["action_timing"]),
+			Event:     fmt.Sprintf("%v", row["event_manipulation"]),
+			Statement: "SOURCE HIDDEN",
+		}
+		triggers = append(triggers, trig)
+	}
+	return triggers, nil
+}
+
+func (k *KingbaseDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+	return fmt.Errorf("read-only mode implemented for Kingbase so far")
+}
+
+func (k *KingbaseDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
+	// dbName 在本项目语义里是“数据库”，schema 由 table_schema 决定；这里返回全部用户 schema 的列用于查询提示。
+	query := `
+		SELECT table_schema, table_name, column_name, data_type
+		FROM information_schema.columns
+		WHERE table_schema NOT IN ('pg_catalog', 'information_schema')
+		  AND table_schema NOT LIKE 'pg_%'
+		ORDER BY table_schema, table_name, ordinal_position`
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var cols []connection.ColumnDefinitionWithTable
+	for _, row := range data {
+		schema := fmt.Sprintf("%v", row["table_schema"])
+		table := fmt.Sprintf("%v", row["table_name"])
+		tableName := table
+		if strings.TrimSpace(schema) != "" {
+			tableName = fmt.Sprintf("%s.%s", schema, table)
+		}
+		col := connection.ColumnDefinitionWithTable{
+			TableName: tableName,
+			Name:      fmt.Sprintf("%v", row["column_name"]),
+			Type:      fmt.Sprintf("%v", row["data_type"]),
+		}
+		cols = append(cols, col)
+	}
+	return cols, nil
+}

internal/db/mysql_impl.go

@@ -1,12 +1,14 @@
 package db
 
 import (
+	"context"
 	"database/sql"
 	"fmt"
 	"strings"
 	"time"
 
 	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
 	"GoNavi-Wails/internal/ssh"
 	"GoNavi-Wails/internal/utils"
 
@@ -14,7 +16,8 @@ import (
 )
 
 type MySQLDB struct {
-	conn *sql.DB
+	conn        *sql.DB
+	pingTimeout time.Duration
 }
 
 func (m *MySQLDB) getDSN(config connection.ConnectionConfig) string {
@@ -27,23 +30,31 @@ func (m *MySQLDB) getDSN(config connection.ConnectionConfig) string {
 		if err == nil {
 			protocol = netName
 			address = fmt.Sprintf("%s:%d", config.Host, config.Port)
+		} else {
+			logger.Warnf("注册 SSH 网络失败，将尝试直连：地址=%s:%d 用户=%s，原因：%v", config.Host, config.Port, config.User, err)
 		}
 	}
 
-	return fmt.Sprintf("%s:%s@%s(%s)/%s?charset=utf8mb4&parseTime=True&loc=Local",
-		config.User, config.Password, protocol, address, database)
+	timeout := getConnectTimeoutSeconds(config)
+
+	return fmt.Sprintf("%s:%s@%s(%s)/%s?charset=utf8mb4&parseTime=True&loc=Local&timeout=%ds",
+		config.User, config.Password, protocol, address, database, timeout)
 }
 
 func (m *MySQLDB) Connect(config connection.ConnectionConfig) error {
 	dsn := m.getDSN(config)
 	db, err := sql.Open("mysql", dsn)
 	if err != nil {
-		return err
+		return fmt.Errorf("打开数据库连接失败：%w", err)
 	}
 	m.conn = db
-	
+	m.pingTimeout = getConnectTimeout(config)
+
 	// Force verification
-	return m.Ping()
+	if err := m.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
+	return nil
 }
 
 func (m *MySQLDB) Close() error {
@@ -57,11 +68,29 @@ func (m *MySQLDB) Ping() error {
 	if m.conn == nil {
 		return fmt.Errorf("connection not open")
 	}
-	ctx, cancel := utils.ContextWithTimeout(5 * time.Second)
+	timeout := m.pingTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	ctx, cancel := utils.ContextWithTimeout(timeout)
 	defer cancel()
 	return m.conn.PingContext(ctx)
 }
 
+func (m *MySQLDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	if m.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := m.conn.QueryContext(ctx, query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+
+	return scanRows(rows)
+}
+
 func (m *MySQLDB) Query(query string) ([]map[string]interface{}, []string, error) {
 	if m.conn == nil {
 		return nil, nil, fmt.Errorf("connection not open")
@@ -72,41 +101,18 @@ func (m *MySQLDB) Query(query string) ([]map[string]interface{}, []string, error
 		return nil, nil, err
 	}
 	defer rows.Close()
+	return scanRows(rows)
+}
 
-	columns, err := rows.Columns()
+func (m *MySQLDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	if m.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := m.conn.ExecContext(ctx, query)
 	if err != nil {
-		return nil, nil, err
+		return 0, err
 	}
-
-	var resultData []map[string]interface{}
-
-	for rows.Next() {
-		values := make([]interface{}, len(columns))
-		valuePtrs := make([]interface{}, len(columns))
-		for i := range columns {
-			valuePtrs[i] = &values[i]
-		}
-
-		if err := rows.Scan(valuePtrs...); err != nil {
-			continue
-		}
-
-		entry := make(map[string]interface{})
-		for i, col := range columns {
-			var v interface{}
-			val := values[i]
-			b, ok := val.([]byte)
-			if ok {
-				v = string(b)
-			} else {
-				v = val
-			}
-			entry[col] = v
-		}
-		resultData = append(resultData, entry)
-	}
-
-	return resultData, columns, nil
+	return res.RowsAffected()
 }
 
 func (m *MySQLDB) Exec(query string) (int64, error) {
@@ -141,12 +147,12 @@ func (m *MySQLDB) GetTables(dbName string) ([]string, error) {
 	if dbName != "" {
 		query = fmt.Sprintf("SHOW TABLES FROM `%s`", dbName)
 	}
-	
+
 	data, _, err := m.Query(query)
 	if err != nil {
 		return nil, err
 	}
-	
+
 	var tables []string
 	for _, row := range data {
 		for _, v := range row {
@@ -167,7 +173,7 @@ func (m *MySQLDB) GetCreateStatement(dbName, tableName string) (string, error) {
 	if err != nil {
 		return "", err
 	}
-	
+
 	if len(data) > 0 {
 		if val, ok := data[0]["Create Table"]; ok {
 			return fmt.Sprintf("%v", val), nil
@@ -197,12 +203,12 @@ func (m *MySQLDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefin
 			Extra:    fmt.Sprintf("%v", row["Extra"]),
 			Comment:  fmt.Sprintf("%v", row["Comment"]),
 		}
-		
+
 		if row["Default"] != nil {
 			d := fmt.Sprintf("%v", row["Default"])
 			col.Default = &d
 		}
-		
+
 		columns = append(columns, col)
 	}
 	return columns, nil
@@ -230,14 +236,14 @@ func (m *MySQLDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefini
 			}
 		}
 
-        seq := 0
-        if val, ok := row["Seq_in_index"]; ok {
+		seq := 0
+		if val, ok := row["Seq_in_index"]; ok {
 			if f, ok := val.(float64); ok {
 				seq = int(f)
 			} else if i, ok := val.(int64); ok {
 				seq = int(i)
 			}
-        }
+		}
 
 		idx := connection.IndexDefinition{
 			Name:       fmt.Sprintf("%v", row["Key_name"]),
@@ -327,12 +333,12 @@ func (m *MySQLDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 	for _, update := range changes.Updates {
 		var sets []string
 		var args []interface{}
-		
+
 		for k, v := range update.Values {
 			sets = append(sets, fmt.Sprintf("`%s` = ?", k))
 			args = append(args, v)
 		}
-		
+
 		if len(sets) == 0 {
 			continue
 		}
@@ -342,7 +348,7 @@ func (m *MySQLDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 			wheres = append(wheres, fmt.Sprintf("`%s` = ?", k))
 			args = append(args, v)
 		}
-		
+
 		if len(wheres) == 0 {
 			return fmt.Errorf("update requires keys")
 		}
@@ -358,13 +364,13 @@ func (m *MySQLDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 		var cols []string
 		var placeholders []string
 		var args []interface{}
-		
+
 		for k, v := range row {
 			cols = append(cols, fmt.Sprintf("`%s`", k))
 			placeholders = append(placeholders, "?")
 			args = append(args, v)
 		}
-		
+
 		if len(cols) == 0 {
 			continue
 		}

internal/db/oracle_impl.go

@@ -0,0 +1,390 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"net"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
+	"GoNavi-Wails/internal/ssh"
+	"GoNavi-Wails/internal/utils"
+
+	_ "github.com/sijms/go-ora/v2"
+)
+
+type OracleDB struct {
+	conn        *sql.DB
+	pingTimeout time.Duration
+	forwarder   *ssh.LocalForwarder // Store SSH tunnel forwarder
+}
+
+func (o *OracleDB) getDSN(config connection.ConnectionConfig) string {
+	// oracle://user:pass@host:port/service_name
+	database := config.Database
+	if database == "" {
+		database = config.User // Default to user service/schema if empty?
+	}
+
+	u := &url.URL{
+		Scheme: "oracle",
+		Host:   net.JoinHostPort(config.Host, strconv.Itoa(config.Port)),
+		Path:   "/" + database,
+	}
+	u.User = url.UserPassword(config.User, config.Password)
+	u.RawPath = "/" + url.PathEscape(database)
+	return u.String()
+}
+
+func (o *OracleDB) Connect(config connection.ConnectionConfig) error {
+	var dsn string
+	var err error
+
+	if config.UseSSH {
+		// Create SSH tunnel with local port forwarding
+		logger.Infof("Oracle 使用 SSH 连接：地址=%s:%d 用户=%s", config.Host, config.Port, config.User)
+
+		forwarder, err := ssh.GetOrCreateLocalForwarder(config.SSH, config.Host, config.Port)
+		if err != nil {
+			return fmt.Errorf("创建 SSH 隧道失败：%w", err)
+		}
+		o.forwarder = forwarder
+
+		// Parse local address
+		host, portStr, err := net.SplitHostPort(forwarder.LocalAddr)
+		if err != nil {
+			return fmt.Errorf("解析本地转发地址失败：%w", err)
+		}
+
+		port, err := strconv.Atoi(portStr)
+		if err != nil {
+			return fmt.Errorf("解析本地端口失败：%w", err)
+		}
+
+		// Create a modified config pointing to local forwarder
+		localConfig := config
+		localConfig.Host = host
+		localConfig.Port = port
+		localConfig.UseSSH = false
+
+		dsn = o.getDSN(localConfig)
+		logger.Infof("Oracle 通过本地端口转发连接：%s -> %s:%d", forwarder.LocalAddr, config.Host, config.Port)
+	} else {
+		dsn = o.getDSN(config)
+	}
+
+	db, err := sql.Open("oracle", dsn)
+	if err != nil {
+		return fmt.Errorf("打开数据库连接失败：%w", err)
+	}
+	o.conn = db
+	o.pingTimeout = getConnectTimeout(config)
+	if err := o.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
+	return nil
+}
+
+func (o *OracleDB) Close() error {
+	// Close SSH forwarder first if exists
+	if o.forwarder != nil {
+		if err := o.forwarder.Close(); err != nil {
+			logger.Warnf("关闭 Oracle SSH 端口转发失败：%v", err)
+		}
+		o.forwarder = nil
+	}
+
+	// Then close database connection
+	if o.conn != nil {
+		return o.conn.Close()
+	}
+	return nil
+}
+
+func (o *OracleDB) Ping() error {
+	if o.conn == nil {
+		return fmt.Errorf("connection not open")
+	}
+	timeout := o.pingTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	ctx, cancel := utils.ContextWithTimeout(timeout)
+	defer cancel()
+	return o.conn.PingContext(ctx)
+}
+
+func (o *OracleDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	if o.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := o.conn.QueryContext(ctx, query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+
+	return scanRows(rows)
+}
+
+func (o *OracleDB) Query(query string) ([]map[string]interface{}, []string, error) {
+	if o.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := o.conn.Query(query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+	return scanRows(rows)
+}
+
+func (o *OracleDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	if o.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := o.conn.ExecContext(ctx, query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (o *OracleDB) Exec(query string) (int64, error) {
+	if o.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := o.conn.Exec(query)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
+
+func (o *OracleDB) GetDatabases() ([]string, error) {
+	// Oracle treats Users/Schemas as "Databases" in this context
+	data, _, err := o.Query("SELECT username FROM all_users ORDER BY username")
+	if err != nil {
+		return nil, err
+	}
+	var dbs []string
+	for _, row := range data {
+		if val, ok := row["USERNAME"]; ok {
+			dbs = append(dbs, fmt.Sprintf("%v", val))
+		}
+	}
+	return dbs, nil
+}
+
+func (o *OracleDB) GetTables(dbName string) ([]string, error) {
+	// dbName is Schema/Owner
+	query := "SELECT table_name FROM user_tables"
+	if dbName != "" {
+		query = fmt.Sprintf("SELECT owner, table_name FROM all_tables WHERE owner = '%s' ORDER BY table_name", strings.ToUpper(dbName))
+	}
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var tables []string
+	for _, row := range data {
+		if dbName != "" {
+			if owner, okOwner := row["OWNER"]; okOwner {
+				if name, okName := row["TABLE_NAME"]; okName {
+					tables = append(tables, fmt.Sprintf("%v.%v", owner, name))
+					continue
+				}
+			}
+		}
+		if val, ok := row["TABLE_NAME"]; ok {
+			tables = append(tables, fmt.Sprintf("%v", val))
+		}
+	}
+	return tables, nil
+}
+
+func (o *OracleDB) GetCreateStatement(dbName, tableName string) (string, error) {
+	// Oracle provides DBMS_METADATA.GET_DDL
+	// Note: LONG type might be tricky, but basic string scan should work for smaller DDLs
+	query := fmt.Sprintf("SELECT DBMS_METADATA.GET_DDL('TABLE', '%s', '%s') as ddl FROM DUAL",
+		strings.ToUpper(tableName), strings.ToUpper(dbName))
+
+	if dbName == "" {
+		query = fmt.Sprintf("SELECT DBMS_METADATA.GET_DDL('TABLE', '%s') as ddl FROM DUAL", strings.ToUpper(tableName))
+	}
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return "", err
+	}
+
+	if len(data) > 0 {
+		if val, ok := data[0]["DDL"]; ok {
+			return fmt.Sprintf("%v", val), nil
+		}
+	}
+	return "", fmt.Errorf("create statement not found")
+}
+
+func (o *OracleDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
+	query := fmt.Sprintf(`SELECT column_name, data_type, nullable, data_default 
+		FROM all_tab_columns 
+		WHERE owner = '%s' AND table_name = '%s' 
+		ORDER BY column_id`, strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	if dbName == "" {
+		query = fmt.Sprintf(`SELECT column_name, data_type, nullable, data_default 
+			FROM user_tab_columns 
+			WHERE table_name = '%s' 
+			ORDER BY column_id`, strings.ToUpper(tableName))
+	}
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var columns []connection.ColumnDefinition
+	for _, row := range data {
+		col := connection.ColumnDefinition{
+			Name:     fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			Type:     fmt.Sprintf("%v", row["DATA_TYPE"]),
+			Nullable: fmt.Sprintf("%v", row["NULLABLE"]),
+		}
+
+		if row["DATA_DEFAULT"] != nil {
+			d := fmt.Sprintf("%v", row["DATA_DEFAULT"])
+			col.Default = &d
+		}
+
+		columns = append(columns, col)
+	}
+	return columns, nil
+}
+
+func (o *OracleDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
+	query := fmt.Sprintf(`SELECT index_name, column_name, uniqueness 
+		FROM all_ind_columns 
+		JOIN all_indexes USING (index_name, owner) 
+		WHERE table_owner = '%s' AND table_name = '%s'`,
+		strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	if dbName == "" {
+		query = fmt.Sprintf(`SELECT index_name, column_name, uniqueness 
+			FROM user_ind_columns 
+			JOIN user_indexes USING (index_name) 
+			WHERE table_name = '%s'`, strings.ToUpper(tableName))
+	}
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var indexes []connection.IndexDefinition
+	for _, row := range data {
+		unique := 1
+		if val, ok := row["UNIQUENESS"]; ok && val == "UNIQUE" {
+			unique = 0
+		}
+
+		idx := connection.IndexDefinition{
+			Name:       fmt.Sprintf("%v", row["INDEX_NAME"]),
+			ColumnName: fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			NonUnique:  unique,
+			// SeqInIndex is harder to get in simple join, omitting or estimating
+			IndexType: "BTREE", // Default assumption
+		}
+		indexes = append(indexes, idx)
+	}
+	return indexes, nil
+}
+
+func (o *OracleDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
+	// Simplified query for FKs
+	query := fmt.Sprintf(`SELECT a.constraint_name, a.column_name, c_pk.table_name r_table_name, b.column_name r_column_name
+		FROM all_cons_columns a
+		JOIN all_constraints c ON a.owner = c.owner AND a.constraint_name = c.constraint_name
+		JOIN all_constraints c_pk ON c.r_owner = c_pk.owner AND c.r_constraint_name = c_pk.constraint_name
+		JOIN all_cons_columns b ON c_pk.owner = b.owner AND c_pk.constraint_name = b.constraint_name AND a.position = b.position
+		WHERE c.constraint_type = 'R' AND a.owner = '%s' AND a.table_name = '%s'`,
+		strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var fks []connection.ForeignKeyDefinition
+	for _, row := range data {
+		fk := connection.ForeignKeyDefinition{
+			Name:           fmt.Sprintf("%v", row["CONSTRAINT_NAME"]),
+			ColumnName:     fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			RefTableName:   fmt.Sprintf("%v", row["R_TABLE_NAME"]),
+			RefColumnName:  fmt.Sprintf("%v", row["R_COLUMN_NAME"]),
+			ConstraintName: fmt.Sprintf("%v", row["CONSTRAINT_NAME"]),
+		}
+		fks = append(fks, fk)
+	}
+	return fks, nil
+}
+
+func (o *OracleDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
+	query := fmt.Sprintf(`SELECT trigger_name, trigger_type, triggering_event 
+		FROM all_triggers 
+		WHERE table_owner = '%s' AND table_name = '%s'`,
+		strings.ToUpper(dbName), strings.ToUpper(tableName))
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var triggers []connection.TriggerDefinition
+	for _, row := range data {
+		trig := connection.TriggerDefinition{
+			Name:      fmt.Sprintf("%v", row["TRIGGER_NAME"]),
+			Timing:    fmt.Sprintf("%v", row["TRIGGER_TYPE"]),
+			Event:     fmt.Sprintf("%v", row["TRIGGERING_EVENT"]),
+			Statement: "SOURCE HIDDEN", // Requires more complex query to get body
+		}
+		triggers = append(triggers, trig)
+	}
+	return triggers, nil
+}
+
+func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+	// TODO: Implement batch application for Oracle using correct syntax
+	return fmt.Errorf("read-only mode implemented for Oracle so far")
+}
+
+func (o *OracleDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
+	query := fmt.Sprintf(`SELECT table_name, column_name, data_type 
+		FROM all_tab_columns 
+		WHERE owner = '%s'`, strings.ToUpper(dbName))
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var cols []connection.ColumnDefinitionWithTable
+	for _, row := range data {
+		col := connection.ColumnDefinitionWithTable{
+			TableName: fmt.Sprintf("%v", row["TABLE_NAME"]),
+			Name:      fmt.Sprintf("%v", row["COLUMN_NAME"]),
+			Type:      fmt.Sprintf("%v", row["DATA_TYPE"]),
+		}
+		cols = append(cols, col)
+	}
+	return cols, nil
+}

internal/db/postgres_impl.go

@@ -1,51 +1,114 @@
 package db
 
 import (
+	"context"
 	"database/sql"
 	"fmt"
+	"net"
+	"net/url"
+	"strconv"
+	"strings"
 	"time"
 
 	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
+	"GoNavi-Wails/internal/ssh"
 	"GoNavi-Wails/internal/utils"
 
 	_ "github.com/lib/pq"
 )
 
+
 type PostgresDB struct {
-	conn *sql.DB
+	conn        *sql.DB
+	pingTimeout time.Duration
+	forwarder   *ssh.LocalForwarder // Store SSH tunnel forwarder
 }
 
+
 func (p *PostgresDB) getDSN(config connection.ConnectionConfig) string {
 	// postgres://user:password@host:port/dbname?sslmode=disable
-	host := config.Host
-	port := config.Port
-	// SSH placeholder kept from original
-	if config.UseSSH {
-		// Logic to be implemented
-	}
-
 	dbname := config.Database
 	if dbname == "" {
 		dbname = "postgres" // Default DB
 	}
 
-	return fmt.Sprintf("postgres://%s:%s@%s:%d/%s?sslmode=disable",
-		config.User, config.Password, host, port, dbname)
+	u := &url.URL{
+		Scheme: "postgres",
+		Host:   net.JoinHostPort(config.Host, strconv.Itoa(config.Port)),
+		Path:   "/" + dbname,
+	}
+	u.User = url.UserPassword(config.User, config.Password)
+	q := url.Values{}
+	q.Set("sslmode", "disable")
+	q.Set("connect_timeout", strconv.Itoa(getConnectTimeoutSeconds(config)))
+	u.RawQuery = q.Encode()
+
+	return u.String()
 }
 
 func (p *PostgresDB) Connect(config connection.ConnectionConfig) error {
-	dsn := p.getDSN(config)
+	var dsn string
+	var err error
+
+	if config.UseSSH {
+		// Create SSH tunnel with local port forwarding
+		logger.Infof("PostgreSQL 使用 SSH 连接：地址=%s:%d 用户=%s", config.Host, config.Port, config.User)
+
+		forwarder, err := ssh.GetOrCreateLocalForwarder(config.SSH, config.Host, config.Port)
+		if err != nil {
+			return fmt.Errorf("创建 SSH 隧道失败：%w", err)
+		}
+		p.forwarder = forwarder
+
+		// Parse local address
+		host, portStr, err := net.SplitHostPort(forwarder.LocalAddr)
+		if err != nil {
+			return fmt.Errorf("解析本地转发地址失败：%w", err)
+		}
+
+		port, err := strconv.Atoi(portStr)
+		if err != nil {
+			return fmt.Errorf("解析本地端口失败：%w", err)
+		}
+
+		// Create a modified config pointing to local forwarder
+		localConfig := config
+		localConfig.Host = host
+		localConfig.Port = port
+		localConfig.UseSSH = false // Disable SSH flag for DSN generation
+
+		dsn = p.getDSN(localConfig)
+		logger.Infof("PostgreSQL 通过本地端口转发连接：%s -> %s:%d", forwarder.LocalAddr, config.Host, config.Port)
+	} else {
+		dsn = p.getDSN(config)
+	}
+
 	db, err := sql.Open("postgres", dsn)
 	if err != nil {
-		return err
+		return fmt.Errorf("打开数据库连接失败：%w", err)
 	}
 	p.conn = db
-	
+	p.pingTimeout = getConnectTimeout(config)
+
 	// Force verification
-	return p.Ping()
+	if err := p.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
+	return nil
 }
 
+
 func (p *PostgresDB) Close() error {
+	// Close SSH forwarder first if exists
+	if p.forwarder != nil {
+		if err := p.forwarder.Close(); err != nil {
+			logger.Warnf("关闭 PostgreSQL SSH 端口转发失败：%v", err)
+		}
+		p.forwarder = nil
+	}
+
+	// Then close database connection
 	if p.conn != nil {
 		return p.conn.Close()
 	}
@@ -56,57 +119,51 @@ func (p *PostgresDB) Ping() error {
 	if p.conn == nil {
 		return fmt.Errorf("connection not open")
 	}
-	ctx, cancel := utils.ContextWithTimeout(5 * time.Second)
+	timeout := p.pingTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	ctx, cancel := utils.ContextWithTimeout(timeout)
 	defer cancel()
 	return p.conn.PingContext(ctx)
 }
 
+func (p *PostgresDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	if p.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := p.conn.QueryContext(ctx, query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+
+	return scanRows(rows)
+}
+
 func (p *PostgresDB) Query(query string) ([]map[string]interface{}, []string, error) {
 	if p.conn == nil {
 		return nil, nil, fmt.Errorf("connection not open")
 	}
 
-
-rows, err := p.conn.Query(query)
+	rows, err := p.conn.Query(query)
 	if err != nil {
 		return nil, nil, err
 	}
 	defer rows.Close()
+	return scanRows(rows)
+}
 
-	columns, err := rows.Columns()
+func (p *PostgresDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	if p.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := p.conn.ExecContext(ctx, query)
 	if err != nil {
-		return nil, nil, err
+		return 0, err
 	}
-
-	var resultData []map[string]interface{}
-
-	for rows.Next() {
-		values := make([]interface{}, len(columns))
-		valuePtrs := make([]interface{}, len(columns))
-		for i := range columns {
-			valuePtrs[i] = &values[i]
-		}
-
-		if err := rows.Scan(valuePtrs...); err != nil {
-			continue
-		}
-
-		entry := make(map[string]interface{})
-		for i, col := range columns {
-			var v interface{}
-			val := values[i]
-			b, ok := val.([]byte)
-			if ok {
-				v = string(b)
-			} else {
-				v = val
-			}
-			entry[col] = v
-		}
-		resultData = append(resultData, entry)
-	}
-
-	return resultData, columns, nil
+	return res.RowsAffected()
 }
 
 func (p *PostgresDB) Exec(query string) (int64, error) {
@@ -135,16 +192,22 @@ func (p *PostgresDB) GetDatabases() ([]string, error) {
 }
 
 func (p *PostgresDB) GetTables(dbName string) ([]string, error) {
-	query := "SELECT tablename FROM pg_catalog.pg_tables WHERE schemaname != 'pg_catalog' AND schemaname != 'information_schema'"
+	query := "SELECT schemaname, tablename FROM pg_catalog.pg_tables WHERE schemaname != 'information_schema' AND schemaname NOT LIKE 'pg_%' ORDER BY schemaname, tablename"
 	data, _, err := p.Query(query)
 	if err != nil {
 		return nil, err
 	}
-	
+
 	var tables []string
 	for _, row := range data {
-		if val, ok := row["tablename"]; ok {
-			tables = append(tables, fmt.Sprintf("%v", val))
+		schema, okSchema := row["schemaname"]
+		name, okName := row["tablename"]
+		if okSchema && okName {
+			tables = append(tables, fmt.Sprintf("%v.%v", schema, name))
+			continue
+		}
+		if okName {
+			tables = append(tables, fmt.Sprintf("%v", name))
 		}
 	}
 	return tables, nil
@@ -155,21 +218,306 @@ func (p *PostgresDB) GetCreateStatement(dbName, tableName string) (string, error
 }
 
 func (p *PostgresDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
-	return []connection.ColumnDefinition{}, nil
+	schema := strings.TrimSpace(dbName)
+	if schema == "" {
+		schema = "public"
+	}
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(s string) string { return strings.ReplaceAll(s, "'", "''") }
+
+	query := fmt.Sprintf(`
+SELECT
+	a.attname AS column_name,
+	pg_catalog.format_type(a.atttypid, a.atttypmod) AS data_type,
+	CASE WHEN a.attnotnull THEN 'NO' ELSE 'YES' END AS is_nullable,
+	pg_get_expr(ad.adbin, ad.adrelid) AS column_default,
+	col_description(a.attrelid, a.attnum) AS comment,
+	CASE WHEN pk.attname IS NOT NULL THEN 'PRI' ELSE '' END AS column_key
+FROM pg_class c
+JOIN pg_namespace n ON n.oid = c.relnamespace
+JOIN pg_attribute a ON a.attrelid = c.oid
+LEFT JOIN pg_attrdef ad ON ad.adrelid = c.oid AND ad.adnum = a.attnum
+LEFT JOIN (
+	SELECT i.indrelid, a3.attname
+	FROM pg_index i
+	JOIN pg_attribute a3 ON a3.attrelid = i.indrelid AND a3.attnum = ANY(i.indkey)
+	WHERE i.indisprimary
+) pk ON pk.indrelid = c.oid AND pk.attname = a.attname
+WHERE c.relkind IN ('r', 'p')
+  AND n.nspname = '%s'
+  AND c.relname = '%s'
+  AND a.attnum > 0
+  AND NOT a.attisdropped
+ORDER BY a.attnum`, esc(schema), esc(table))
+
+	data, _, err := p.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var columns []connection.ColumnDefinition
+	for _, row := range data {
+		col := connection.ColumnDefinition{
+			Name:     fmt.Sprintf("%v", row["column_name"]),
+			Type:     fmt.Sprintf("%v", row["data_type"]),
+			Nullable: fmt.Sprintf("%v", row["is_nullable"]),
+			Key:      fmt.Sprintf("%v", row["column_key"]),
+			Extra:    "",
+			Comment:  "",
+		}
+
+		if v, ok := row["comment"]; ok && v != nil {
+			col.Comment = fmt.Sprintf("%v", v)
+		}
+
+		if v, ok := row["column_default"]; ok && v != nil {
+			def := fmt.Sprintf("%v", v)
+			col.Default = &def
+			if strings.HasPrefix(strings.ToLower(strings.TrimSpace(def)), "nextval(") {
+				col.Extra = "auto_increment"
+			}
+		}
+
+		columns = append(columns, col)
+	}
+	return columns, nil
 }
 
 func (p *PostgresDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
-	return []connection.IndexDefinition{}, nil
+	schema := strings.TrimSpace(dbName)
+	if schema == "" {
+		schema = "public"
+	}
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(s string) string { return strings.ReplaceAll(s, "'", "''") }
+
+	query := fmt.Sprintf(`
+SELECT
+	i.relname AS index_name,
+	a.attname AS column_name,
+	ix.indisunique AS is_unique,
+	x.ordinality AS seq_in_index,
+	am.amname AS index_type
+FROM pg_class t
+JOIN pg_namespace n ON n.oid = t.relnamespace
+JOIN pg_index ix ON t.oid = ix.indrelid
+JOIN pg_class i ON i.oid = ix.indexrelid
+JOIN pg_am am ON i.relam = am.oid
+JOIN unnest(ix.indkey) WITH ORDINALITY AS x(attnum, ordinality) ON TRUE
+JOIN pg_attribute a ON a.attrelid = t.oid AND a.attnum = x.attnum
+WHERE t.relkind IN ('r', 'p')
+  AND t.relname = '%s'
+  AND n.nspname = '%s'
+ORDER BY i.relname, x.ordinality`, esc(table), esc(schema))
+
+	data, _, err := p.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	parseBool := func(v interface{}) bool {
+		switch val := v.(type) {
+		case bool:
+			return val
+		case string:
+			s := strings.ToLower(strings.TrimSpace(val))
+			return s == "t" || s == "true" || s == "1" || s == "y" || s == "yes"
+		default:
+			s := strings.ToLower(strings.TrimSpace(fmt.Sprintf("%v", v)))
+			return s == "t" || s == "true" || s == "1" || s == "y" || s == "yes"
+		}
+	}
+
+	parseInt := func(v interface{}) int {
+		switch val := v.(type) {
+		case int:
+			return val
+		case int64:
+			return int(val)
+		case float64:
+			return int(val)
+		case string:
+			// best effort
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(val), "%d", &n)
+			return n
+		default:
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(fmt.Sprintf("%v", v)), "%d", &n)
+			return n
+		}
+	}
+
+	var indexes []connection.IndexDefinition
+	for _, row := range data {
+		isUnique := false
+		if v, ok := row["is_unique"]; ok && v != nil {
+			isUnique = parseBool(v)
+		}
+
+		nonUnique := 1
+		if isUnique {
+			nonUnique = 0
+		}
+
+		seq := 0
+		if v, ok := row["seq_in_index"]; ok && v != nil {
+			seq = parseInt(v)
+		}
+
+		indexType := ""
+		if v, ok := row["index_type"]; ok && v != nil {
+			indexType = strings.ToUpper(fmt.Sprintf("%v", v))
+		}
+		if indexType == "" {
+			indexType = "BTREE"
+		}
+
+		idx := connection.IndexDefinition{
+			Name:       fmt.Sprintf("%v", row["index_name"]),
+			ColumnName: fmt.Sprintf("%v", row["column_name"]),
+			NonUnique:  nonUnique,
+			SeqInIndex: seq,
+			IndexType:  indexType,
+		}
+		indexes = append(indexes, idx)
+	}
+	return indexes, nil
 }
 
 func (p *PostgresDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
-	return []connection.ForeignKeyDefinition{}, nil
+	schema := strings.TrimSpace(dbName)
+	if schema == "" {
+		schema = "public"
+	}
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(s string) string { return strings.ReplaceAll(s, "'", "''") }
+
+	query := fmt.Sprintf(`
+SELECT
+	tc.constraint_name AS constraint_name,
+	kcu.column_name AS column_name,
+	ccu.table_schema AS foreign_table_schema,
+	ccu.table_name AS foreign_table_name,
+	ccu.column_name AS foreign_column_name
+FROM information_schema.table_constraints AS tc
+JOIN information_schema.key_column_usage AS kcu
+  ON tc.constraint_name = kcu.constraint_name
+  AND tc.table_schema = kcu.table_schema
+JOIN information_schema.constraint_column_usage AS ccu
+  ON ccu.constraint_name = tc.constraint_name
+  AND ccu.table_schema = tc.table_schema
+WHERE tc.constraint_type = 'FOREIGN KEY'
+  AND tc.table_name = '%s'
+  AND tc.table_schema = '%s'
+ORDER BY tc.constraint_name, kcu.ordinal_position`, esc(table), esc(schema))
+
+	data, _, err := p.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var fks []connection.ForeignKeyDefinition
+	for _, row := range data {
+		refSchema := ""
+		if v, ok := row["foreign_table_schema"]; ok && v != nil {
+			refSchema = fmt.Sprintf("%v", v)
+		}
+		refTable := fmt.Sprintf("%v", row["foreign_table_name"])
+		refTableName := refTable
+		if strings.TrimSpace(refSchema) != "" {
+			refTableName = fmt.Sprintf("%s.%s", refSchema, refTable)
+		}
+
+		fk := connection.ForeignKeyDefinition{
+			Name:           fmt.Sprintf("%v", row["constraint_name"]),
+			ColumnName:     fmt.Sprintf("%v", row["column_name"]),
+			RefTableName:   refTableName,
+			RefColumnName:  fmt.Sprintf("%v", row["foreign_column_name"]),
+			ConstraintName: fmt.Sprintf("%v", row["constraint_name"]),
+		}
+		fks = append(fks, fk)
+	}
+	return fks, nil
 }
 
 func (p *PostgresDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
-	return []connection.TriggerDefinition{}, nil
+	schema := strings.TrimSpace(dbName)
+	if schema == "" {
+		schema = "public"
+	}
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(s string) string { return strings.ReplaceAll(s, "'", "''") }
+
+	query := fmt.Sprintf(`
+SELECT trigger_name, action_timing, event_manipulation, action_statement
+FROM information_schema.triggers
+WHERE event_object_table = '%s'
+  AND event_object_schema = '%s'
+ORDER BY trigger_name, event_manipulation`, esc(table), esc(schema))
+
+	data, _, err := p.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var triggers []connection.TriggerDefinition
+	for _, row := range data {
+		trig := connection.TriggerDefinition{
+			Name:      fmt.Sprintf("%v", row["trigger_name"]),
+			Timing:    fmt.Sprintf("%v", row["action_timing"]),
+			Event:     fmt.Sprintf("%v", row["event_manipulation"]),
+			Statement: fmt.Sprintf("%v", row["action_statement"]),
+		}
+		triggers = append(triggers, trig)
+	}
+	return triggers, nil
 }
 
 func (p *PostgresDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
-	return []connection.ColumnDefinitionWithTable{}, nil
+	query := `
+SELECT table_schema, table_name, column_name, data_type
+FROM information_schema.columns
+WHERE table_schema NOT IN ('pg_catalog', 'information_schema')
+  AND table_schema NOT LIKE 'pg_%'
+ORDER BY table_schema, table_name, ordinal_position`
+
+	data, _, err := p.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var cols []connection.ColumnDefinitionWithTable
+	for _, row := range data {
+		schema := fmt.Sprintf("%v", row["table_schema"])
+		table := fmt.Sprintf("%v", row["table_name"])
+		tableName := table
+		if strings.TrimSpace(schema) != "" {
+			tableName = fmt.Sprintf("%s.%s", schema, table)
+		}
+
+		col := connection.ColumnDefinitionWithTable{
+			TableName: tableName,
+			Name:      fmt.Sprintf("%v", row["column_name"]),
+			Type:      fmt.Sprintf("%v", row["data_type"]),
+		}
+		cols = append(cols, col)
+	}
+	return cols, nil
 }

internal/db/query_value.go

@@ -0,0 +1,114 @@
+package db
+
+import (
+	"encoding/hex"
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+// normalizeQueryValue normalizes driver-returned values for UI/JSON transport.
+// 当前主要处理 []byte：如果是可读文本则转为 string，否则转为十六进制字符串，避免前端出现“空白值”。
+func normalizeQueryValue(v interface{}) interface{} {
+	return normalizeQueryValueWithDBType(v, "")
+}
+
+func normalizeQueryValueWithDBType(v interface{}, databaseTypeName string) interface{} {
+	if b, ok := v.([]byte); ok {
+		return bytesToDisplayValue(b, databaseTypeName)
+	}
+	return v
+}
+
+func bytesToDisplayValue(b []byte, databaseTypeName string) interface{} {
+	if b == nil {
+		return nil
+	}
+	if len(b) == 0 {
+		return ""
+	}
+
+	dbType := strings.ToUpper(strings.TrimSpace(databaseTypeName))
+	if isBitLikeDBType(dbType) {
+		if u, ok := bytesToUint64(b); ok {
+			// JS number precision is limited; keep large bitmasks as string.
+			const maxSafeInteger = 9007199254740991 // 2^53 - 1
+			if u <= maxSafeInteger {
+				return int64(u)
+			}
+			return fmt.Sprintf("%d", u)
+		}
+	}
+
+	if utf8.Valid(b) {
+		s := string(b)
+		if isMostlyPrintable(s) {
+			return s
+		}
+	}
+
+	// Fallback: some drivers return BIT(1) as []byte{0} / []byte{1} without type info.
+	if dbType == "" && len(b) == 1 && (b[0] == 0 || b[0] == 1) {
+		return int64(b[0])
+	}
+
+	return bytesToReadableString(b)
+}
+
+func bytesToReadableString(b []byte) interface{} {
+	if b == nil {
+		return nil
+	}
+	if len(b) == 0 {
+		return ""
+	}
+	return "0x" + hex.EncodeToString(b)
+}
+
+func isBitLikeDBType(typeName string) bool {
+	if typeName == "" {
+		return false
+	}
+	switch typeName {
+	case "BIT", "VARBIT":
+		return true
+	default:
+	}
+	return strings.HasPrefix(typeName, "BIT")
+}
+
+func bytesToUint64(b []byte) (uint64, bool) {
+	if len(b) == 0 || len(b) > 8 {
+		return 0, false
+	}
+	var u uint64
+	for _, v := range b {
+		u = (u << 8) | uint64(v)
+	}
+	return u, true
+}
+
+func isMostlyPrintable(s string) bool {
+	if s == "" {
+		return true
+	}
+
+	total := 0
+	printable := 0
+	for _, r := range s {
+		total++
+		switch r {
+		case '\n', '\r', '\t':
+			printable++
+			continue
+		default:
+		}
+		if unicode.IsPrint(r) {
+			printable++
+		}
+	}
+
+	// 允许少量不可见字符，避免把正常文本误判为二进制。
+	return printable*100 >= total*90
+}

internal/db/query_value_test.go

@@ -0,0 +1,44 @@
+package db
+
+import "testing"
+
+func TestNormalizeQueryValueWithDBType_BitBytes(t *testing.T) {
+	v := normalizeQueryValueWithDBType([]byte{0x00}, "BIT")
+	if v != int64(0) {
+		t.Fatalf("BIT 0x00 期望为 0，实际=%v(%T)", v, v)
+	}
+
+	v = normalizeQueryValueWithDBType([]byte{0x01}, "bit")
+	if v != int64(1) {
+		t.Fatalf("BIT 0x01 期望为 1，实际=%v(%T)", v, v)
+	}
+
+	v = normalizeQueryValueWithDBType([]byte{0x01, 0x02}, "BIT VARYING")
+	if v != int64(258) {
+		t.Fatalf("BIT 0x0102 期望为 258，实际=%v(%T)", v, v)
+	}
+}
+
+func TestNormalizeQueryValueWithDBType_BitLargeAsString(t *testing.T) {
+	v := normalizeQueryValueWithDBType([]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, "BIT")
+	if s, ok := v.(string); !ok || s != "18446744073709551615" {
+		t.Fatalf("BIT 0xffffffffffffffff 期望为 string(18446744073709551615)，实际=%v(%T)", v, v)
+	}
+}
+
+func TestNormalizeQueryValueWithDBType_ByteFallbacks(t *testing.T) {
+	v := normalizeQueryValueWithDBType([]byte("abc"), "")
+	if v != "abc" {
+		t.Fatalf("文本 []byte 期望返回 string，实际=%v(%T)", v, v)
+	}
+
+	v = normalizeQueryValueWithDBType([]byte{0x00}, "")
+	if v != int64(0) {
+		t.Fatalf("未知类型 0x00 期望返回 0，实际=%v(%T)", v, v)
+	}
+
+	v = normalizeQueryValueWithDBType([]byte{0xff}, "")
+	if v != "0xff" {
+		t.Fatalf("未知类型 0xff 期望返回 0xff，实际=%v(%T)", v, v)
+	}
+}

internal/db/scan_rows.go

@@ -0,0 +1,46 @@
+package db
+
+import (
+	"database/sql"
+)
+
+func scanRows(rows *sql.Rows) ([]map[string]interface{}, []string, error) {
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	colTypes, err := rows.ColumnTypes()
+	if err != nil || len(colTypes) != len(columns) {
+		colTypes = nil
+	}
+
+	resultData := make([]map[string]interface{}, 0)
+
+	for rows.Next() {
+		values := make([]interface{}, len(columns))
+		valuePtrs := make([]interface{}, len(columns))
+		for i := range columns {
+			valuePtrs[i] = &values[i]
+		}
+
+		if err := rows.Scan(valuePtrs...); err != nil {
+			continue
+		}
+
+		entry := make(map[string]interface{}, len(columns))
+		for i, col := range columns {
+			dbTypeName := ""
+			if colTypes != nil && i < len(colTypes) && colTypes[i] != nil {
+				dbTypeName = colTypes[i].DatabaseTypeName()
+			}
+			entry[col] = normalizeQueryValueWithDBType(values[i], dbTypeName)
+		}
+		resultData = append(resultData, entry)
+	}
+
+	if err := rows.Err(); err != nil {
+		return resultData, columns, err
+	}
+	return resultData, columns, nil
+}

internal/db/sqlite_impl.go

@@ -1,8 +1,10 @@
 package db
 
 import (
+	"context"
 	"database/sql"
 	"fmt"
+	"strings"
 	"time"
 
 	"GoNavi-Wails/internal/connection"
@@ -12,19 +14,24 @@ import (
 )
 
 type SQLiteDB struct {
-	conn *sql.DB
+	conn        *sql.DB
+	pingTimeout time.Duration
 }
 
 func (s *SQLiteDB) Connect(config connection.ConnectionConfig) error {
-	dsn := config.Host 
+	dsn := config.Host
 	db, err := sql.Open("sqlite", dsn)
 	if err != nil {
-		return err
+		return fmt.Errorf("打开数据库连接失败：%w", err)
 	}
 	s.conn = db
-	
+	s.pingTimeout = getConnectTimeout(config)
+
 	// Force verification
-	return s.Ping()
+	if err := s.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
+	return nil
 }
 
 func (s *SQLiteDB) Close() error {
@@ -38,11 +45,29 @@ func (s *SQLiteDB) Ping() error {
 	if s.conn == nil {
 		return fmt.Errorf("connection not open")
 	}
-	ctx, cancel := utils.ContextWithTimeout(5 * time.Second)
+	timeout := s.pingTimeout
+	if timeout <= 0 {
+		timeout = 5 * time.Second
+	}
+	ctx, cancel := utils.ContextWithTimeout(timeout)
 	defer cancel()
 	return s.conn.PingContext(ctx)
 }
 
+func (s *SQLiteDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	if s.conn == nil {
+		return nil, nil, fmt.Errorf("connection not open")
+	}
+
+	rows, err := s.conn.QueryContext(ctx, query)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer rows.Close()
+
+	return scanRows(rows)
+}
+
 func (s *SQLiteDB) Query(query string) ([]map[string]interface{}, []string, error) {
 	if s.conn == nil {
 		return nil, nil, fmt.Errorf("connection not open")
@@ -53,41 +78,18 @@ func (s *SQLiteDB) Query(query string) ([]map[string]interface{}, []string, erro
 		return nil, nil, err
 	}
 	defer rows.Close()
+	return scanRows(rows)
+}
 
-	columns, err := rows.Columns()
+func (s *SQLiteDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	if s.conn == nil {
+		return 0, fmt.Errorf("connection not open")
+	}
+	res, err := s.conn.ExecContext(ctx, query)
 	if err != nil {
-		return nil, nil, err
+		return 0, err
 	}
-
-	var resultData []map[string]interface{}
-
-	for rows.Next() {
-		values := make([]interface{}, len(columns))
-		valuePtrs := make([]interface{}, len(columns))
-		for i := range columns {
-			valuePtrs[i] = &values[i]
-		}
-
-		if err := rows.Scan(valuePtrs...); err != nil {
-			continue
-		}
-
-		entry := make(map[string]interface{})
-		for i, col := range columns {
-			var v interface{}
-			val := values[i]
-			b, ok := val.([]byte)
-			if ok {
-				v = string(b)
-			} else {
-				v = val
-			}
-			entry[col] = v
-		}
-		resultData = append(resultData, entry)
-	}
-
-	return resultData, columns, nil
+	return res.RowsAffected()
 }
 
 func (s *SQLiteDB) Exec(query string) (int64, error) {
@@ -111,7 +113,7 @@ func (s *SQLiteDB) GetTables(dbName string) ([]string, error) {
 	if err != nil {
 		return nil, err
 	}
-	
+
 	var tables []string
 	for _, row := range data {
 		if val, ok := row["name"]; ok {
@@ -136,21 +138,336 @@ func (s *SQLiteDB) GetCreateStatement(dbName, tableName string) (string, error)
 }
 
 func (s *SQLiteDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
-	return []connection.ColumnDefinition{}, nil
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(v string) string { return strings.ReplaceAll(v, "'", "''") }
+
+	// cid, name, type, notnull, dflt_value, pk
+	data, _, err := s.Query(fmt.Sprintf("PRAGMA table_info('%s')", esc(table)))
+	if err != nil {
+		return nil, err
+	}
+
+	parseInt := func(v interface{}) int {
+		switch val := v.(type) {
+		case int:
+			return val
+		case int64:
+			return int(val)
+		case float64:
+			return int(val)
+		case string:
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(val), "%d", &n)
+			return n
+		default:
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(fmt.Sprintf("%v", v)), "%d", &n)
+			return n
+		}
+	}
+
+	getStr := func(row map[string]interface{}, key string) string {
+		if v, ok := row[key]; ok && v != nil {
+			return fmt.Sprintf("%v", v)
+		}
+		if v, ok := row[strings.ToUpper(key)]; ok && v != nil {
+			return fmt.Sprintf("%v", v)
+		}
+		return ""
+	}
+
+	var columns []connection.ColumnDefinition
+	for _, row := range data {
+		notnull := 0
+		if v, ok := row["notnull"]; ok && v != nil {
+			notnull = parseInt(v)
+		} else if v, ok := row["NOTNULL"]; ok && v != nil {
+			notnull = parseInt(v)
+		}
+
+		pk := 0
+		if v, ok := row["pk"]; ok && v != nil {
+			pk = parseInt(v)
+		} else if v, ok := row["PK"]; ok && v != nil {
+			pk = parseInt(v)
+		}
+
+		nullable := "YES"
+		if notnull == 1 {
+			nullable = "NO"
+		}
+
+		key := ""
+		if pk == 1 {
+			key = "PRI"
+		}
+
+		col := connection.ColumnDefinition{
+			Name:     getStr(row, "name"),
+			Type:     getStr(row, "type"),
+			Nullable: nullable,
+			Key:      key,
+			Extra:    "",
+			Comment:  "",
+		}
+
+		if v, ok := row["dflt_value"]; ok && v != nil {
+			def := fmt.Sprintf("%v", v)
+			col.Default = &def
+		} else if v, ok := row["DFLT_VALUE"]; ok && v != nil {
+			def := fmt.Sprintf("%v", v)
+			col.Default = &def
+		}
+
+		columns = append(columns, col)
+	}
+	return columns, nil
 }
 
 func (s *SQLiteDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
-	return []connection.IndexDefinition{}, nil
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(v string) string { return strings.ReplaceAll(v, "'", "''") }
+	parseInt := func(v interface{}) int {
+		switch val := v.(type) {
+		case int:
+			return val
+		case int64:
+			return int(val)
+		case float64:
+			return int(val)
+		case string:
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(val), "%d", &n)
+			return n
+		default:
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(fmt.Sprintf("%v", v)), "%d", &n)
+			return n
+		}
+	}
+
+	data, _, err := s.Query(fmt.Sprintf("PRAGMA index_list('%s')", esc(table)))
+	if err != nil {
+		return nil, err
+	}
+
+	var indexes []connection.IndexDefinition
+	for _, row := range data {
+		indexName := ""
+		if v, ok := row["name"]; ok && v != nil {
+			indexName = fmt.Sprintf("%v", v)
+		} else if v, ok := row["NAME"]; ok && v != nil {
+			indexName = fmt.Sprintf("%v", v)
+		}
+		if strings.TrimSpace(indexName) == "" {
+			continue
+		}
+
+		unique := 0
+		if v, ok := row["unique"]; ok && v != nil {
+			unique = parseInt(v)
+		} else if v, ok := row["UNIQUE"]; ok && v != nil {
+			unique = parseInt(v)
+		}
+		nonUnique := 1
+		if unique == 1 {
+			nonUnique = 0
+		}
+
+		cols, _, err := s.Query(fmt.Sprintf("PRAGMA index_info('%s')", esc(indexName)))
+		if err != nil {
+			// skip broken index
+			continue
+		}
+
+		for _, c := range cols {
+			colName := ""
+			if v, ok := c["name"]; ok && v != nil {
+				colName = fmt.Sprintf("%v", v)
+			} else if v, ok := c["NAME"]; ok && v != nil {
+				colName = fmt.Sprintf("%v", v)
+			}
+			if strings.TrimSpace(colName) == "" {
+				continue
+			}
+
+			seq := 0
+			if v, ok := c["seqno"]; ok && v != nil {
+				seq = parseInt(v) + 1
+			} else if v, ok := c["SEQNO"]; ok && v != nil {
+				seq = parseInt(v) + 1
+			}
+
+			indexes = append(indexes, connection.IndexDefinition{
+				Name:       indexName,
+				ColumnName: colName,
+				NonUnique:  nonUnique,
+				SeqInIndex: seq,
+				IndexType:  "BTREE",
+			})
+		}
+	}
+
+	return indexes, nil
 }
 
 func (s *SQLiteDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
-	return []connection.ForeignKeyDefinition{}, nil
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(v string) string { return strings.ReplaceAll(v, "'", "''") }
+
+	data, _, err := s.Query(fmt.Sprintf("PRAGMA foreign_key_list('%s')", esc(table)))
+	if err != nil {
+		return nil, err
+	}
+
+	parseInt := func(v interface{}) int {
+		switch val := v.(type) {
+		case int:
+			return val
+		case int64:
+			return int(val)
+		case float64:
+			return int(val)
+		case string:
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(val), "%d", &n)
+			return n
+		default:
+			var n int
+			_, _ = fmt.Sscanf(strings.TrimSpace(fmt.Sprintf("%v", v)), "%d", &n)
+			return n
+		}
+	}
+
+	var fks []connection.ForeignKeyDefinition
+	for _, row := range data {
+		id := 0
+		if v, ok := row["id"]; ok && v != nil {
+			id = parseInt(v)
+		} else if v, ok := row["ID"]; ok && v != nil {
+			id = parseInt(v)
+		}
+
+		refTable := ""
+		if v, ok := row["table"]; ok && v != nil {
+			refTable = fmt.Sprintf("%v", v)
+		} else if v, ok := row["TABLE"]; ok && v != nil {
+			refTable = fmt.Sprintf("%v", v)
+		}
+
+		fromCol := ""
+		if v, ok := row["from"]; ok && v != nil {
+			fromCol = fmt.Sprintf("%v", v)
+		} else if v, ok := row["FROM"]; ok && v != nil {
+			fromCol = fmt.Sprintf("%v", v)
+		}
+
+		toCol := ""
+		if v, ok := row["to"]; ok && v != nil {
+			toCol = fmt.Sprintf("%v", v)
+		} else if v, ok := row["TO"]; ok && v != nil {
+			toCol = fmt.Sprintf("%v", v)
+		}
+
+		name := fmt.Sprintf("fk_%s_%d", table, id)
+		fks = append(fks, connection.ForeignKeyDefinition{
+			Name:           name,
+			ColumnName:     fromCol,
+			RefTableName:   refTable,
+			RefColumnName:  toCol,
+			ConstraintName: name,
+		})
+	}
+	return fks, nil
 }
 
 func (s *SQLiteDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
-	return []connection.TriggerDefinition{}, nil
+	table := strings.TrimSpace(tableName)
+	if table == "" {
+		return nil, fmt.Errorf("table name required")
+	}
+
+	esc := func(v string) string { return strings.ReplaceAll(v, "'", "''") }
+
+	data, _, err := s.Query(fmt.Sprintf("SELECT name AS trigger_name, sql AS statement FROM sqlite_master WHERE type='trigger' AND tbl_name='%s' ORDER BY name", esc(table)))
+	if err != nil {
+		return nil, err
+	}
+
+	var triggers []connection.TriggerDefinition
+	for _, row := range data {
+		name := fmt.Sprintf("%v", row["trigger_name"])
+		stmt := ""
+		if v, ok := row["statement"]; ok && v != nil {
+			stmt = fmt.Sprintf("%v", v)
+		}
+
+		upper := strings.ToUpper(stmt)
+		timing := ""
+		switch {
+		case strings.Contains(upper, " BEFORE "):
+			timing = "BEFORE"
+		case strings.Contains(upper, " AFTER "):
+			timing = "AFTER"
+		case strings.Contains(upper, " INSTEAD OF "):
+			timing = "INSTEAD OF"
+		}
+
+		event := ""
+		switch {
+		case strings.Contains(upper, " INSERT "):
+			event = "INSERT"
+		case strings.Contains(upper, " UPDATE "):
+			event = "UPDATE"
+		case strings.Contains(upper, " DELETE "):
+			event = "DELETE"
+		}
+
+		triggers = append(triggers, connection.TriggerDefinition{
+			Name:      name,
+			Timing:    timing,
+			Event:     event,
+			Statement: stmt,
+		})
+	}
+	return triggers, nil
 }
 
 func (s *SQLiteDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
-	return []connection.ColumnDefinitionWithTable{}, nil
+	tables, err := s.GetTables(dbName)
+	if err != nil {
+		return nil, err
+	}
+
+	var cols []connection.ColumnDefinitionWithTable
+	for _, table := range tables {
+		// Skip internal tables
+		if strings.HasPrefix(strings.ToLower(table), "sqlite_") {
+			continue
+		}
+		columns, err := s.GetColumns("", table)
+		if err != nil {
+			continue
+		}
+		for _, col := range columns {
+			cols = append(cols, connection.ColumnDefinitionWithTable{
+				TableName: table,
+				Name:      col.Name,
+				Type:      col.Type,
+			})
+		}
+	}
+	return cols, nil
 }

internal/db/timeout.go

@@ -0,0 +1,22 @@
+package db
+
+import (
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+)
+
+const defaultConnectTimeoutSeconds = 30
+
+func getConnectTimeoutSeconds(config connection.ConnectionConfig) int {
+	timeoutSeconds := config.Timeout
+	if timeoutSeconds <= 0 {
+		timeoutSeconds = defaultConnectTimeoutSeconds
+	}
+	return timeoutSeconds
+}
+
+func getConnectTimeout(config connection.ConnectionConfig) time.Duration {
+	return time.Duration(getConnectTimeoutSeconds(config)) * time.Second
+}
+

internal/logger/logger.go

@@ -0,0 +1,197 @@
+package logger
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+)
+
+const (
+	envLogDir  = "GONAVI_LOG_DIR"
+	appDirName = "GoNavi"
+
+	logFileName         = "gonavi.log"
+	logRotateMaxBytes   = 10 * 1024 * 1024 // 10MB
+	logRotateMaxBackups = 10
+)
+
+var (
+	once    sync.Once
+	logMu   sync.Mutex
+	logInst *log.Logger
+	logFile *os.File
+	logPath string
+)
+
+func Init() {
+	once.Do(func() {
+		path, out := initOutput()
+		logMu.Lock()
+		defer logMu.Unlock()
+		logPath = path
+		logInst = log.New(out, "", log.Ldate|log.Ltime|log.Lmicroseconds)
+		logInst.Printf("[信息] 日志初始化完成，日志文件：%s", logPath)
+	})
+}
+
+func Path() string {
+	Init()
+	logMu.Lock()
+	defer logMu.Unlock()
+	return logPath
+}
+
+func Close() {
+	Init()
+	logMu.Lock()
+	defer logMu.Unlock()
+	if logInst != nil {
+		logInst.SetOutput(os.Stderr)
+	}
+	if logFile != nil {
+		_ = logFile.Close()
+		logFile = nil
+	}
+}
+
+func Infof(format string, args ...any) {
+	printf("信息", format, args...)
+}
+
+func Warnf(format string, args ...any) {
+	printf("警告", format, args...)
+}
+
+func Errorf(format string, args ...any) {
+	printf("错误", format, args...)
+}
+
+func Error(err error, format string, args ...any) {
+	msg := fmt.Sprintf(format, args...)
+	if err == nil {
+		Errorf("%s", msg)
+		return
+	}
+	Errorf("%s；错误链：%s", msg, ErrorChain(err))
+}
+
+func ErrorChain(err error) string {
+	if err == nil {
+		return ""
+	}
+
+	var parts []string
+	seen := map[string]struct{}{}
+	cur := err
+	truncated := false
+	for i := 0; cur != nil && i < 20; i++ {
+		s := cur.Error()
+		if _, ok := seen[s]; !ok {
+			seen[s] = struct{}{}
+			parts = append(parts, s)
+		}
+		cur = errors.Unwrap(cur)
+	}
+	if cur != nil {
+		truncated = true
+	}
+
+	if len(parts) == 0 {
+		return err.Error()
+	}
+	if truncated {
+		parts = append(parts, "（错误链过长，已截断）")
+	}
+	return strings.Join(parts, " -> ")
+}
+
+func printf(level string, format string, args ...any) {
+	Init()
+	logMu.Lock()
+	inst := logInst
+	logMu.Unlock()
+	if inst == nil {
+		return
+	}
+	inst.Printf("[%s] %s", level, fmt.Sprintf(format, args...))
+}
+
+func initOutput() (string, io.Writer) {
+	dir := strings.TrimSpace(os.Getenv(envLogDir))
+	if dir == "" {
+		base, err := os.UserConfigDir()
+		if err != nil || strings.TrimSpace(base) == "" {
+			base = os.TempDir()
+		}
+		dir = filepath.Join(base, appDirName, "logs")
+	}
+
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return filepath.Join(dir, logFileName), os.Stderr
+	}
+
+	path := filepath.Join(dir, logFileName)
+	rotateIfNeeded(path, dir)
+
+	f, err := os.OpenFile(path, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0o644)
+	if err != nil {
+		return path, os.Stderr
+	}
+	logFile = f
+	return path, f
+}
+
+func rotateIfNeeded(path, dir string) {
+	fi, err := os.Stat(path)
+	if err != nil || fi.IsDir() {
+		return
+	}
+	if fi.Size() < logRotateMaxBytes {
+		return
+	}
+
+	ts := time.Now().Format("20060102-150405")
+	rotated := filepath.Join(dir, fmt.Sprintf("gonavi-%s.log", ts))
+	if err := os.Rename(path, rotated); err != nil {
+		return
+	}
+	cleanupOldLogs(dir)
+}
+
+func cleanupOldLogs(dir string) {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return
+	}
+
+	type item struct {
+		name string
+		path string
+	}
+	var logs []item
+	for _, e := range entries {
+		if e.IsDir() {
+			continue
+		}
+		name := e.Name()
+		if !strings.HasPrefix(name, "gonavi-") || !strings.HasSuffix(name, ".log") {
+			continue
+		}
+		logs = append(logs, item{name: name, path: filepath.Join(dir, name)})
+	}
+
+	sort.Slice(logs, func(i, j int) bool { return logs[i].name > logs[j].name })
+	if len(logs) <= logRotateMaxBackups {
+		return
+	}
+	for _, it := range logs[logRotateMaxBackups:] {
+		_ = os.Remove(it.path)
+	}
+}

internal/ssh/ssh.go

@@ -3,11 +3,14 @@ package ssh
 import (
 	"context"
 	"fmt"
+	"io"
 	"net"
 	"os"
+	"sync"
 	"time"
 
 	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
 
 	"github.com/go-sql-driver/mysql"
 	"golang.org/x/crypto/ssh"
@@ -19,18 +22,49 @@ type ViaSSHDialer struct {
 }
 
 func (d *ViaSSHDialer) Dial(ctx context.Context, addr string) (net.Conn, error) {
-	return d.sshClient.Dial("tcp", addr)
+	return dialContext(ctx, d.sshClient, "tcp", addr)
+}
+
+func dialContext(ctx context.Context, client *ssh.Client, network, addr string) (net.Conn, error) {
+	type result struct {
+		conn net.Conn
+		err  error
+	}
+
+	ch := make(chan result, 1)
+	go func() {
+		c, err := client.Dial(network, addr)
+		ch <- result{conn: c, err: err}
+	}()
+
+	select {
+	case <-ctx.Done():
+		go func() {
+			r := <-ch
+			if r.conn != nil {
+				_ = r.conn.Close()
+			}
+		}()
+		return nil, ctx.Err()
+	case r := <-ch:
+		return r.conn, r.err
+	}
 }
 
 // connectSSH establishes an SSH connection and returns a Dialer
 func connectSSH(config connection.SSHConfig) (*ssh.Client, error) {
+	logger.Infof("开始建立 SSH 连接：地址=%s:%d 用户=%s", config.Host, config.Port, config.User)
 	authMethods := []ssh.AuthMethod{}
 
 	if config.KeyPath != "" {
 		key, err := os.ReadFile(config.KeyPath)
-		if err == nil {
+		if err != nil {
+			logger.Warnf("读取 SSH 私钥失败：路径=%s，原因：%v", config.KeyPath, err)
+		} else {
 			signer, err := ssh.ParsePrivateKey(key)
-			if err == nil {
+			if err != nil {
+				logger.Warnf("解析 SSH 私钥失败：路径=%s，原因：%v", config.KeyPath, err)
+			} else {
 				authMethods = append(authMethods, ssh.PublicKeys(signer))
 			}
 		}
@@ -39,6 +73,9 @@ func connectSSH(config connection.SSHConfig) (*ssh.Client, error) {
 	if config.Password != "" {
 		authMethods = append(authMethods, ssh.Password(config.Password))
 	}
+	if len(authMethods) == 0 {
+		logger.Warnf("SSH 未配置认证方式（密码或私钥）")
+	}
 
 	sshConfig := &ssh.ClientConfig{
 		User:            config.User,
@@ -48,7 +85,13 @@ func connectSSH(config connection.SSHConfig) (*ssh.Client, error) {
 	}
 
 	addr := fmt.Sprintf("%s:%d", config.Host, config.Port)
-	return ssh.Dial("tcp", addr, sshConfig)
+	client, err := ssh.Dial("tcp", addr, sshConfig)
+	if err != nil {
+		logger.Error(err, "SSH 连接建立失败：地址=%s 用户=%s", addr, config.User)
+		return nil, err
+	}
+	logger.Infof("SSH 连接建立成功：地址=%s 用户=%s", addr, config.User)
+	return client, nil
 }
 
 // RegisterSSHNetwork registers a unique network name for a specific SSH tunnel
@@ -61,10 +104,272 @@ func RegisterSSHNetwork(sshConfig connection.SSHConfig) (string, error) {
 
 	// Generate unique network name
 	netName := fmt.Sprintf("ssh_%s_%d", sshConfig.Host, time.Now().UnixNano())
+	logger.Infof("注册 SSH 网络：%s（地址=%s:%d 用户=%s）", netName, sshConfig.Host, sshConfig.Port, sshConfig.User)
 	
 	mysql.RegisterDialContext(netName, func(ctx context.Context, addr string) (net.Conn, error) {
-		return client.Dial("tcp", addr)
+		return dialContext(ctx, client, "tcp", addr)
 	})
 
 	return netName, nil
 }
+
+// sshClientCache stores SSH clients to avoid creating multiple connections
+var (
+	sshClientCache   = make(map[string]*ssh.Client)
+	sshClientCacheMu sync.RWMutex
+	localForwarders  = make(map[string]*LocalForwarder)
+	forwarderMu      sync.RWMutex
+)
+
+// LocalForwarder represents a local port forwarder through SSH
+type LocalForwarder struct {
+	LocalAddr  string
+	RemoteAddr string
+	SSHClient  *ssh.Client
+	listener   net.Listener
+	closeChan  chan struct{}
+	closeOnce  sync.Once // 防止重复关闭
+	closed     bool      // 关闭状态标记
+	closedMu   sync.RWMutex
+}
+
+// NewLocalForwarder creates a new local port forwarder
+// It listens on a random local port and forwards all connections through SSH tunnel
+func NewLocalForwarder(sshConfig connection.SSHConfig, remoteHost string, remotePort int) (*LocalForwarder, error) {
+	client, err := GetOrCreateSSHClient(sshConfig)
+	if err != nil {
+		return nil, fmt.Errorf("建立 SSH 连接失败：%w", err)
+	}
+
+	// Listen on localhost with a random port
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		return nil, fmt.Errorf("创建本地监听器失败：%w", err)
+	}
+
+	localAddr := listener.Addr().String()
+	remoteAddr := fmt.Sprintf("%s:%d", remoteHost, remotePort)
+
+	forwarder := &LocalForwarder{
+		LocalAddr:  localAddr,
+		RemoteAddr: remoteAddr,
+		SSHClient:  client,
+		listener:   listener,
+		closeChan:  make(chan struct{}),
+	}
+
+	// Start forwarding in background
+	go forwarder.forward()
+
+	logger.Infof("已创建 SSH 端口转发：本地 %s -> 远程 %s", localAddr, remoteAddr)
+	return forwarder, nil
+}
+
+// forward handles the port forwarding
+func (f *LocalForwarder) forward() {
+	for {
+		localConn, err := f.listener.Accept()
+		if err != nil {
+			// Check if we're shutting down
+			select {
+			case <-f.closeChan:
+				return
+			default:
+				logger.Warnf("接受本地连接失败：%v", err)
+				// listener可能已关闭,退出循环
+				return
+			}
+		}
+
+		go f.handleConnection(localConn)
+	}
+}
+
+// handleConnection handles a single connection
+func (f *LocalForwarder) handleConnection(localConn net.Conn) {
+	defer localConn.Close()
+
+	// Connect to remote through SSH with timeout
+	remoteConn, err := f.SSHClient.Dial("tcp", f.RemoteAddr)
+	if err != nil {
+		logger.Warnf("通过 SSH 连接到远程 %s 失败：%v", f.RemoteAddr, err)
+		return
+	}
+	defer remoteConn.Close()
+
+	// Bidirectional copy with error channel
+	errc := make(chan error, 2)
+
+	// Copy from local to remote
+	go func() {
+		_, err := io.Copy(remoteConn, localConn)
+		if err != nil {
+			logger.Warnf("本地->远程数据复制错误：%v", err)
+		}
+		errc <- err
+	}()
+
+	// Copy from remote to local
+	go func() {
+		_, err := io.Copy(localConn, remoteConn)
+		if err != nil {
+			logger.Warnf("远程->本地数据复制错误：%v", err)
+		}
+		errc <- err
+	}()
+
+	// Wait for BOTH goroutines to complete
+	<-errc
+	<-errc
+}
+
+// Close closes the forwarder (thread-safe, can be called multiple times)
+func (f *LocalForwarder) Close() error {
+	var err error
+	f.closeOnce.Do(func() {
+		f.closedMu.Lock()
+		f.closed = true
+		f.closedMu.Unlock()
+
+		close(f.closeChan)
+		err = f.listener.Close()
+		if err != nil {
+			logger.Warnf("关闭端口转发监听器失败：%v", err)
+		}
+	})
+	return err
+}
+
+// IsClosed returns whether the forwarder is closed
+func (f *LocalForwarder) IsClosed() bool {
+	f.closedMu.RLock()
+	defer f.closedMu.RUnlock()
+	return f.closed
+}
+
+// GetOrCreateLocalForwarder returns a cached forwarder or creates a new one
+func GetOrCreateLocalForwarder(sshConfig connection.SSHConfig, remoteHost string, remotePort int) (*LocalForwarder, error) {
+	key := fmt.Sprintf("%s:%d:%s->%s:%d",
+		sshConfig.Host, sshConfig.Port, sshConfig.User,
+		remoteHost, remotePort)
+
+	forwarderMu.RLock()
+	forwarder, exists := localForwarders[key]
+	forwarderMu.RUnlock()
+
+	// Check if exists and is still valid
+	if exists && forwarder != nil && !forwarder.IsClosed() {
+		logger.Infof("复用已有端口转发：%s", key)
+		return forwarder, nil
+	}
+
+	// Remove stale forwarder from cache
+	if exists {
+		forwarderMu.Lock()
+		delete(localForwarders, key)
+		forwarderMu.Unlock()
+	}
+
+	forwarder, err := NewLocalForwarder(sshConfig, remoteHost, remotePort)
+	if err != nil {
+		return nil, err
+	}
+
+	forwarderMu.Lock()
+	localForwarders[key] = forwarder
+	forwarderMu.Unlock()
+
+	return forwarder, nil
+}
+
+// CloseAllForwarders closes all local forwarders
+func CloseAllForwarders() {
+	forwarderMu.Lock()
+	defer forwarderMu.Unlock()
+
+	for key, forwarder := range localForwarders {
+		if forwarder != nil {
+			_ = forwarder.Close()
+			logger.Infof("已关闭端口转发：%s", key)
+		}
+	}
+	localForwarders = make(map[string]*LocalForwarder)
+}
+
+
+// getSSHClientCacheKey generates a unique cache key for SSH config
+func getSSHClientCacheKey(config connection.SSHConfig) string {
+	return fmt.Sprintf("%s:%d:%s", config.Host, config.Port, config.User)
+}
+
+// GetOrCreateSSHClient returns a cached SSH client or creates a new one
+func GetOrCreateSSHClient(config connection.SSHConfig) (*ssh.Client, error) {
+	key := getSSHClientCacheKey(config)
+
+	sshClientCacheMu.RLock()
+	client, exists := sshClientCache[key]
+	sshClientCacheMu.RUnlock()
+
+	if exists && client != nil {
+		// Test if connection is still alive by creating a test session
+		session, err := client.NewSession()
+		if err == nil {
+			session.Close()
+			logger.Infof("复用已有 SSH 连接：%s", key)
+			return client, nil
+		}
+		// Connection is dead, remove from cache
+		logger.Warnf("SSH 连接已断开，重新建立：%s (错误: %v)", key, err)
+		sshClientCacheMu.Lock()
+		delete(sshClientCache, key)
+		sshClientCacheMu.Unlock()
+		// Try to close the dead client
+		_ = client.Close()
+	}
+
+	// Create new SSH client
+	client, err := connectSSH(config)
+	if err != nil {
+		return nil, err
+	}
+
+	// Cache the client
+	sshClientCacheMu.Lock()
+	sshClientCache[key] = client
+	sshClientCacheMu.Unlock()
+
+	logger.Infof("已缓存 SSH 连接：%s", key)
+	return client, nil
+}
+
+// DialThroughSSH creates a connection through SSH tunnel
+// This is a generic dialer that can be used by any database driver
+func DialThroughSSH(config connection.SSHConfig, network, address string) (net.Conn, error) {
+	client, err := GetOrCreateSSHClient(config)
+	if err != nil {
+		return nil, fmt.Errorf("建立 SSH 连接失败：%w", err)
+	}
+
+	conn, err := client.Dial(network, address)
+	if err != nil {
+		return nil, fmt.Errorf("通过 SSH 隧道连接到 %s 失败：%w", address, err)
+	}
+
+	logger.Infof("已通过 SSH 隧道连接到：%s", address)
+	return conn, nil
+}
+
+// CloseAllSSHClients closes all cached SSH clients
+func CloseAllSSHClients() {
+	sshClientCacheMu.Lock()
+	defer sshClientCacheMu.Unlock()
+
+	for key, client := range sshClientCache {
+		if client != nil {
+			_ = client.Close()
+			logger.Infof("已关闭 SSH 连接：%s", key)
+		}
+	}
+	sshClientCache = make(map[string]*ssh.Client)
+}
+

internal/sync/analyze.go

@@ -0,0 +1,198 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/db"
+	"GoNavi-Wails/internal/logger"
+	"fmt"
+	"strings"
+)
+
+type TableDiffSummary struct {
+	Table     string `json:"table"`
+	PKColumn  string `json:"pkColumn,omitempty"`
+	CanSync   bool   `json:"canSync"`
+	Inserts   int    `json:"inserts"`
+	Updates   int    `json:"updates"`
+	Deletes   int    `json:"deletes"`
+	Same      int    `json:"same"`
+	Message   string `json:"message,omitempty"`
+	HasSchema bool   `json:"hasSchema,omitempty"`
+}
+
+type SyncAnalyzeResult struct {
+	Success bool               `json:"success"`
+	Message string             `json:"message"`
+	Tables  []TableDiffSummary `json:"tables"`
+}
+
+func (s *SyncEngine) Analyze(config SyncConfig) SyncAnalyzeResult {
+	result := SyncAnalyzeResult{Success: true, Tables: []TableDiffSummary{}}
+
+	contentRaw := strings.ToLower(strings.TrimSpace(config.Content))
+	syncSchema := false
+	syncData := true
+	switch contentRaw {
+	case "", "data":
+		syncData = true
+	case "schema":
+		syncSchema = true
+		syncData = false
+	case "both":
+		syncSchema = true
+		syncData = true
+	default:
+		s.appendLog(config.JobID, nil, "warn", fmt.Sprintf("未知同步内容 %q，已自动使用仅同步数据", config.Content))
+		syncData = true
+	}
+
+	totalTables := len(config.Tables)
+	s.progress(config.JobID, 0, totalTables, "", "差异分析开始")
+
+	sourceDB, err := db.NewDatabase(config.SourceConfig.Type)
+	if err != nil {
+		logger.Error(err, "初始化源数据库驱动失败：类型=%s", config.SourceConfig.Type)
+		return SyncAnalyzeResult{Success: false, Message: "初始化源数据库驱动失败: " + err.Error()}
+	}
+	targetDB, err := db.NewDatabase(config.TargetConfig.Type)
+	if err != nil {
+		logger.Error(err, "初始化目标数据库驱动失败：类型=%s", config.TargetConfig.Type)
+		return SyncAnalyzeResult{Success: false, Message: "初始化目标数据库驱动失败: " + err.Error()}
+	}
+
+	// Connect Source
+	if err := sourceDB.Connect(config.SourceConfig); err != nil {
+		logger.Error(err, "源数据库连接失败：%s", formatConnSummaryForSync(config.SourceConfig))
+		return SyncAnalyzeResult{Success: false, Message: "源数据库连接失败: " + err.Error()}
+	}
+	defer sourceDB.Close()
+
+	// Connect Target
+	if err := targetDB.Connect(config.TargetConfig); err != nil {
+		logger.Error(err, "目标数据库连接失败：%s", formatConnSummaryForSync(config.TargetConfig))
+		return SyncAnalyzeResult{Success: false, Message: "目标数据库连接失败: " + err.Error()}
+	}
+	defer targetDB.Close()
+
+	for i, tableName := range config.Tables {
+		func() {
+			s.progress(config.JobID, i, totalTables, tableName, fmt.Sprintf("分析表(%d/%d)", i+1, totalTables))
+
+			summary := TableDiffSummary{
+				Table:     tableName,
+				CanSync:   false,
+				Inserts:   0,
+				Updates:   0,
+				Deletes:   0,
+				Same:      0,
+				Message:   "",
+				HasSchema: syncSchema,
+			}
+
+			sourceSchema, sourceTable := normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+			targetSchema, targetTable := normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+			sourceQueryTable := qualifiedNameForQuery(config.SourceConfig.Type, sourceSchema, sourceTable, tableName)
+			targetQueryTable := qualifiedNameForQuery(config.TargetConfig.Type, targetSchema, targetTable, tableName)
+
+			cols, err := sourceDB.GetColumns(sourceSchema, sourceTable)
+			if err != nil {
+				summary.Message = "获取源表字段失败: " + err.Error()
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+
+			if !syncData {
+				summary.CanSync = true
+				summary.Message = "仅同步结构，未执行数据差异分析"
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+
+			pkCols := make([]string, 0, 2)
+			for _, c := range cols {
+				if c.Key == "PRI" || c.Key == "PK" {
+					pkCols = append(pkCols, c.Name)
+				}
+			}
+			if len(pkCols) == 0 {
+				summary.Message = "无主键，不支持数据对比/同步"
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+			if len(pkCols) > 1 {
+				summary.Message = fmt.Sprintf("复合主键（%s），暂不支持数据对比/同步", strings.Join(pkCols, ","))
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+			summary.PKColumn = pkCols[0]
+
+			// Query data for diff
+			sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.SourceConfig.Type, sourceQueryTable)))
+			if err != nil {
+				summary.Message = "读取源表失败: " + err.Error()
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+			targetRows, _, err := targetDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.TargetConfig.Type, targetQueryTable)))
+			if err != nil {
+				summary.Message = "读取目标表失败: " + err.Error()
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+
+			pkCol := summary.PKColumn
+			targetMap := make(map[string]map[string]interface{}, len(targetRows))
+			for _, row := range targetRows {
+				if row[pkCol] == nil {
+					continue
+				}
+				pkVal := strings.TrimSpace(fmt.Sprintf("%v", row[pkCol]))
+				if pkVal == "" || pkVal == "<nil>" {
+					continue
+				}
+				targetMap[pkVal] = row
+			}
+
+			sourcePKSet := make(map[string]struct{}, len(sourceRows))
+			for _, sRow := range sourceRows {
+				if sRow[pkCol] == nil {
+					continue
+				}
+				pkVal := strings.TrimSpace(fmt.Sprintf("%v", sRow[pkCol]))
+				if pkVal == "" || pkVal == "<nil>" {
+					continue
+				}
+				sourcePKSet[pkVal] = struct{}{}
+
+				if tRow, exists := targetMap[pkVal]; exists {
+					changed := false
+					for k, v := range sRow {
+						if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", tRow[k]) {
+							changed = true
+							break
+						}
+					}
+					if changed {
+						summary.Updates++
+					} else {
+						summary.Same++
+					}
+				} else {
+					summary.Inserts++
+				}
+			}
+
+			for pkVal := range targetMap {
+				if _, ok := sourcePKSet[pkVal]; !ok {
+					summary.Deletes++
+				}
+			}
+
+			summary.CanSync = true
+			result.Tables = append(result.Tables, summary)
+		}()
+	}
+
+	s.progress(config.JobID, totalTables, totalTables, "", "差异分析完成")
+	result.Message = fmt.Sprintf("已完成 %d 张表的差异分析", len(result.Tables))
+	return result
+}

internal/sync/preview.go

@@ -0,0 +1,164 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/db"
+	"fmt"
+	"strings"
+)
+
+type PreviewRow struct {
+	PK  string                 `json:"pk"`
+	Row map[string]interface{} `json:"row"`
+}
+
+type PreviewUpdateRow struct {
+	PK             string                 `json:"pk"`
+	ChangedColumns []string               `json:"changedColumns"`
+	Source         map[string]interface{} `json:"source"`
+	Target         map[string]interface{} `json:"target"`
+}
+
+type TableDiffPreview struct {
+	Table        string             `json:"table"`
+	PKColumn     string             `json:"pkColumn"`
+	TotalInserts int                `json:"totalInserts"`
+	TotalUpdates int                `json:"totalUpdates"`
+	TotalDeletes int                `json:"totalDeletes"`
+	Inserts      []PreviewRow       `json:"inserts"`
+	Updates      []PreviewUpdateRow `json:"updates"`
+	Deletes      []PreviewRow       `json:"deletes"`
+}
+
+func (s *SyncEngine) Preview(config SyncConfig, tableName string, limit int) (TableDiffPreview, error) {
+	if limit <= 0 {
+		limit = 200
+	}
+	if limit > 500 {
+		limit = 500
+	}
+
+	sourceDB, err := db.NewDatabase(config.SourceConfig.Type)
+	if err != nil {
+		return TableDiffPreview{}, fmt.Errorf("初始化源数据库驱动失败: %w", err)
+	}
+	targetDB, err := db.NewDatabase(config.TargetConfig.Type)
+	if err != nil {
+		return TableDiffPreview{}, fmt.Errorf("初始化目标数据库驱动失败: %w", err)
+	}
+
+	if err := sourceDB.Connect(config.SourceConfig); err != nil {
+		return TableDiffPreview{}, fmt.Errorf("源数据库连接失败: %w", err)
+	}
+	defer sourceDB.Close()
+
+	if err := targetDB.Connect(config.TargetConfig); err != nil {
+		return TableDiffPreview{}, fmt.Errorf("目标数据库连接失败: %w", err)
+	}
+	defer targetDB.Close()
+
+	sourceSchema, sourceTable := normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+	targetSchema, targetTable := normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+	sourceQueryTable := qualifiedNameForQuery(config.SourceConfig.Type, sourceSchema, sourceTable, tableName)
+	targetQueryTable := qualifiedNameForQuery(config.TargetConfig.Type, targetSchema, targetTable, tableName)
+
+	cols, err := sourceDB.GetColumns(sourceSchema, sourceTable)
+	if err != nil {
+		return TableDiffPreview{}, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+
+	pkCols := make([]string, 0, 2)
+	for _, c := range cols {
+		if c.Key == "PRI" || c.Key == "PK" {
+			pkCols = append(pkCols, c.Name)
+		}
+	}
+	if len(pkCols) == 0 {
+		return TableDiffPreview{}, fmt.Errorf("无主键，不支持数据预览")
+	}
+	if len(pkCols) > 1 {
+		return TableDiffPreview{}, fmt.Errorf("复合主键（%s），暂不支持数据预览", strings.Join(pkCols, ","))
+	}
+	pkCol := pkCols[0]
+
+	sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.SourceConfig.Type, sourceQueryTable)))
+	if err != nil {
+		return TableDiffPreview{}, fmt.Errorf("读取源表失败: %w", err)
+	}
+	targetRows, _, err := targetDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.TargetConfig.Type, targetQueryTable)))
+	if err != nil {
+		return TableDiffPreview{}, fmt.Errorf("读取目标表失败: %w", err)
+	}
+
+	targetMap := make(map[string]map[string]interface{}, len(targetRows))
+	for _, row := range targetRows {
+		if row[pkCol] == nil {
+			continue
+		}
+		pkVal := strings.TrimSpace(fmt.Sprintf("%v", row[pkCol]))
+		if pkVal == "" || pkVal == "<nil>" {
+			continue
+		}
+		targetMap[pkVal] = row
+	}
+
+	out := TableDiffPreview{
+		Table:        tableName,
+		PKColumn:     pkCol,
+		TotalInserts: 0,
+		TotalUpdates: 0,
+		TotalDeletes: 0,
+		Inserts:      make([]PreviewRow, 0),
+		Updates:      make([]PreviewUpdateRow, 0),
+		Deletes:      make([]PreviewRow, 0),
+	}
+
+	sourcePKSet := make(map[string]struct{}, len(sourceRows))
+	for _, sRow := range sourceRows {
+		if sRow[pkCol] == nil {
+			continue
+		}
+		pkVal := strings.TrimSpace(fmt.Sprintf("%v", sRow[pkCol]))
+		if pkVal == "" || pkVal == "<nil>" {
+			continue
+		}
+		sourcePKSet[pkVal] = struct{}{}
+
+		if tRow, exists := targetMap[pkVal]; exists {
+			changedColumns := make([]string, 0)
+			for k, v := range sRow {
+				if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", tRow[k]) {
+					changedColumns = append(changedColumns, k)
+				}
+			}
+			if len(changedColumns) > 0 {
+				out.TotalUpdates++
+				if len(out.Updates) < limit {
+					out.Updates = append(out.Updates, PreviewUpdateRow{
+						PK:             pkVal,
+						ChangedColumns: changedColumns,
+						Source:         sRow,
+						Target:         tRow,
+					})
+				}
+			}
+			continue
+		}
+
+		out.TotalInserts++
+		if len(out.Inserts) < limit {
+			out.Inserts = append(out.Inserts, PreviewRow{PK: pkVal, Row: sRow})
+		}
+	}
+
+	for pkVal, row := range targetMap {
+		if _, ok := sourcePKSet[pkVal]; ok {
+			continue
+		}
+		out.TotalDeletes++
+		if len(out.Deletes) < limit {
+			out.Deletes = append(out.Deletes, PreviewRow{PK: pkVal, Row: row})
+		}
+	}
+
+	return out, nil
+}

internal/sync/row_selection.go

@@ -0,0 +1,58 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"fmt"
+)
+
+func filterRowsByPKSelection(pkCol string, rows []map[string]interface{}, enabled bool, selectedPKs []string) []map[string]interface{} {
+	if !enabled {
+		return nil
+	}
+	if len(rows) == 0 {
+		return rows
+	}
+	if len(selectedPKs) == 0 {
+		return rows
+	}
+
+	set := make(map[string]struct{}, len(selectedPKs))
+	for _, pk := range selectedPKs {
+		set[pk] = struct{}{}
+	}
+
+	out := make([]map[string]interface{}, 0, len(rows))
+	for _, row := range rows {
+		pkStr := fmt.Sprintf("%v", row[pkCol])
+		if _, ok := set[pkStr]; ok {
+			out = append(out, row)
+		}
+	}
+	return out
+}
+
+func filterUpdatesByPKSelection(pkCol string, updates []connection.UpdateRow, enabled bool, selectedPKs []string) []connection.UpdateRow {
+	if !enabled {
+		return nil
+	}
+	if len(updates) == 0 {
+		return updates
+	}
+	if len(selectedPKs) == 0 {
+		return updates
+	}
+
+	set := make(map[string]struct{}, len(selectedPKs))
+	for _, pk := range selectedPKs {
+		set[pk] = struct{}{}
+	}
+
+	out := make([]connection.UpdateRow, 0, len(updates))
+	for _, u := range updates {
+		pkStr := fmt.Sprintf("%v", u.Keys[pkCol])
+		if _, ok := set[pkStr]; ok {
+			out = append(out, u)
+		}
+	}
+	return out
+}

internal/sync/schema_align.go

@@ -0,0 +1,97 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"strings"
+)
+
+func collectRequiredColumns(inserts []map[string]interface{}, updates []connection.UpdateRow) map[string]string {
+	// key: lower(columnName), value: original columnName
+	required := make(map[string]string)
+	for _, row := range inserts {
+		for k := range row {
+			key := strings.ToLower(strings.TrimSpace(k))
+			if key == "" {
+				continue
+			}
+			if _, exists := required[key]; !exists {
+				required[key] = k
+			}
+		}
+	}
+	for _, u := range updates {
+		for k := range u.Values {
+			key := strings.ToLower(strings.TrimSpace(k))
+			if key == "" {
+				continue
+			}
+			if _, exists := required[key]; !exists {
+				required[key] = k
+			}
+		}
+	}
+	return required
+}
+
+func filterInsertRows(inserts []map[string]interface{}, allowedLower map[string]struct{}) []map[string]interface{} {
+	if len(inserts) == 0 || len(allowedLower) == 0 {
+		return inserts
+	}
+
+	out := make([]map[string]interface{}, 0, len(inserts))
+	for _, row := range inserts {
+		if len(row) == 0 {
+			out = append(out, row)
+			continue
+		}
+		n := make(map[string]interface{}, len(row))
+		for k, v := range row {
+			if _, ok := allowedLower[strings.ToLower(strings.TrimSpace(k))]; ok {
+				n[k] = v
+			}
+		}
+		out = append(out, n)
+	}
+	return out
+}
+
+func filterUpdateRows(updates []connection.UpdateRow, allowedLower map[string]struct{}) []connection.UpdateRow {
+	if len(updates) == 0 || len(allowedLower) == 0 {
+		return updates
+	}
+
+	out := make([]connection.UpdateRow, 0, len(updates))
+	for _, u := range updates {
+		if len(u.Values) == 0 {
+			continue
+		}
+
+		values := make(map[string]interface{}, len(u.Values))
+		for k, v := range u.Values {
+			if _, ok := allowedLower[strings.ToLower(strings.TrimSpace(k))]; ok {
+				values[k] = v
+			}
+		}
+		if len(values) == 0 {
+			continue
+		}
+		out = append(out, connection.UpdateRow{
+			Keys:   u.Keys,
+			Values: values,
+		})
+	}
+	return out
+}
+
+func sanitizeMySQLColumnType(t string) string {
+	tt := strings.TrimSpace(t)
+	if tt == "" {
+		return "TEXT"
+	}
+
+	// 基础防护：避免把元数据中异常内容拼进 SQL。
+	if strings.ContainsAny(tt, "`;\n\r") {
+		return "TEXT"
+	}
+	return tt
+}

internal/sync/schema_sync.go

@@ -0,0 +1,101 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/db"
+	"fmt"
+	"strings"
+)
+
+func (s *SyncEngine) syncTableSchema(config SyncConfig, res *SyncResult, sourceDB db.Database, targetDB db.Database, tableName string) error {
+	targetType := strings.ToLower(strings.TrimSpace(config.TargetConfig.Type))
+	if targetType != "mysql" {
+		s.appendLog(config.JobID, res, "warn", fmt.Sprintf("目标数据库类型=%s 暂不支持结构同步，已跳过表 %s", config.TargetConfig.Type, tableName))
+		return nil
+	}
+
+	sourceSchema, sourceTable := normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+	targetSchema, targetTable := normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+	targetQueryTable := qualifiedNameForQuery(config.TargetConfig.Type, targetSchema, targetTable, tableName)
+
+	// 1) 获取源表字段
+	sourceCols, err := sourceDB.GetColumns(sourceSchema, sourceTable)
+	if err != nil {
+		return fmt.Errorf("获取源表字段失败: %w", err)
+	}
+
+	// 2) 确保目标表存在
+	targetCols, err := targetDB.GetColumns(targetSchema, targetTable)
+	if err != nil {
+		sourceType := strings.ToLower(strings.TrimSpace(config.SourceConfig.Type))
+		if sourceType != "mysql" {
+			return fmt.Errorf("目标表不存在且源类型=%s 暂不支持自动建表: %w", config.SourceConfig.Type, err)
+		}
+
+		s.appendLog(config.JobID, res, "warn", fmt.Sprintf("目标表 %s 不存在，开始尝试创建表结构", tableName))
+		createSQL, errCreate := sourceDB.GetCreateStatement(sourceSchema, sourceTable)
+		if errCreate != nil || strings.TrimSpace(createSQL) == "" {
+			if errCreate == nil {
+				errCreate = fmt.Errorf("建表语句为空")
+			}
+			return fmt.Errorf("获取源表建表语句失败: %w", errCreate)
+		}
+
+		if _, errExec := targetDB.Exec(createSQL); errExec != nil {
+			return fmt.Errorf("创建目标表失败: %w", errExec)
+		}
+		s.appendLog(config.JobID, res, "info", fmt.Sprintf("目标表创建成功：%s", tableName))
+
+		targetCols, err = targetDB.GetColumns(targetSchema, targetTable)
+		if err != nil {
+			return fmt.Errorf("创建目标表后获取字段失败: %w", err)
+		}
+	}
+
+	targetColSet := make(map[string]struct{}, len(targetCols))
+	for _, c := range targetCols {
+		name := strings.ToLower(strings.TrimSpace(c.Name))
+		if name == "" {
+			continue
+		}
+		targetColSet[name] = struct{}{}
+	}
+
+	// 3) 补齐目标缺失字段（安全策略：新增字段统一允许 NULL）
+	missing := make([]string, 0)
+	sourceType := strings.ToLower(strings.TrimSpace(config.SourceConfig.Type))
+	for _, c := range sourceCols {
+		colName := strings.TrimSpace(c.Name)
+		if colName == "" {
+			continue
+		}
+		lower := strings.ToLower(colName)
+		if _, ok := targetColSet[lower]; ok {
+			continue
+		}
+		missing = append(missing, colName)
+
+		colType := "TEXT"
+		if sourceType == "mysql" {
+			colType = sanitizeMySQLColumnType(c.Type)
+		}
+
+		alterSQL := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+			quoteQualifiedIdentByType("mysql", targetQueryTable),
+			quoteIdentByType("mysql", colName),
+			colType,
+		)
+		if _, err := targetDB.Exec(alterSQL); err != nil {
+			s.appendLog(config.JobID, res, "error", fmt.Sprintf("  -> 补字段失败：表=%s 字段=%s 错误=%v", tableName, colName, err))
+			continue
+		}
+		s.appendLog(config.JobID, res, "info", fmt.Sprintf("  -> 已补齐字段：表=%s 字段=%s 类型=%s", tableName, colName, colType))
+	}
+
+	if len(missing) == 0 {
+		s.appendLog(config.JobID, res, "info", fmt.Sprintf("表结构一致：%s", tableName))
+	} else {
+		s.appendLog(config.JobID, res, "info", fmt.Sprintf("表结构同步完成：%s（新增字段 %d 个）", tableName, len(missing)))
+	}
+
+	return nil
+}

internal/sync/sql_helpers.go

@@ -0,0 +1,109 @@
+package sync
+
+import "strings"
+
+func normalizeSyncMode(mode string) string {
+	m := strings.ToLower(strings.TrimSpace(mode))
+	switch m {
+	case "", "insert_update":
+		return "insert_update"
+	case "insert_only":
+		return "insert_only"
+	case "full_overwrite":
+		return "full_overwrite"
+	default:
+		return "insert_update"
+	}
+}
+
+func quoteIdentByType(dbType string, ident string) string {
+	if ident == "" {
+		return ident
+	}
+
+	switch dbType {
+	case "mysql":
+		return "`" + strings.ReplaceAll(ident, "`", "``") + "`"
+	default:
+		return `"` + strings.ReplaceAll(ident, `"`, `""`) + `"`
+	}
+}
+
+func quoteQualifiedIdentByType(dbType string, ident string) string {
+	raw := strings.TrimSpace(ident)
+	if raw == "" {
+		return raw
+	}
+
+	parts := strings.Split(raw, ".")
+	if len(parts) <= 1 {
+		return quoteIdentByType(dbType, raw)
+	}
+
+	quotedParts := make([]string, 0, len(parts))
+	for _, part := range parts {
+		part = strings.TrimSpace(part)
+		if part == "" {
+			continue
+		}
+		quotedParts = append(quotedParts, quoteIdentByType(dbType, part))
+	}
+
+	if len(quotedParts) == 0 {
+		return quoteIdentByType(dbType, raw)
+	}
+	return strings.Join(quotedParts, ".")
+}
+
+func normalizeSchemaAndTable(dbType string, dbName string, tableName string) (string, string) {
+	rawTable := strings.TrimSpace(tableName)
+	rawDB := strings.TrimSpace(dbName)
+	if rawTable == "" {
+		return rawDB, rawTable
+	}
+
+	if parts := strings.SplitN(rawTable, ".", 2); len(parts) == 2 {
+		schema := strings.TrimSpace(parts[0])
+		table := strings.TrimSpace(parts[1])
+		if schema != "" && table != "" {
+			return schema, table
+		}
+	}
+
+	switch strings.ToLower(strings.TrimSpace(dbType)) {
+	case "postgres", "kingbase":
+		return "public", rawTable
+	default:
+		return rawDB, rawTable
+	}
+}
+
+func qualifiedNameForQuery(dbType string, schema string, table string, original string) string {
+	raw := strings.TrimSpace(original)
+	if raw == "" {
+		return raw
+	}
+	if strings.Contains(raw, ".") {
+		return raw
+	}
+
+	switch strings.ToLower(strings.TrimSpace(dbType)) {
+	case "postgres", "kingbase":
+		s := strings.TrimSpace(schema)
+		if s == "" {
+			s = "public"
+		}
+		if table == "" {
+			return raw
+		}
+		return s + "." + table
+	case "mysql":
+		s := strings.TrimSpace(schema)
+		if s == "" || table == "" {
+			return table
+		}
+		return s + "." + table
+	default:
+		return table
+	}
+}

internal/sync/sync_engine.go

@@ -0,0 +1,556 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	"GoNavi-Wails/internal/logger"
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+)
+
+// SyncConfig defines the parameters for a synchronization task
+type SyncConfig struct {
+	SourceConfig   connection.ConnectionConfig `json:"sourceConfig"`
+	TargetConfig   connection.ConnectionConfig `json:"targetConfig"`
+	Tables         []string                    `json:"tables"`            // Tables to sync
+	Content        string                      `json:"content,omitempty"` // "data", "schema", "both"
+	Mode           string                      `json:"mode"`              // "insert_update", "insert_only", "full_overwrite"
+	JobID          string                      `json:"jobId,omitempty"`
+	AutoAddColumns bool                        `json:"autoAddColumns,omitempty"` // 自动补齐缺失字段（当前仅 MySQL 目标支持）
+	TableOptions   map[string]TableOptions     `json:"tableOptions,omitempty"`
+}
+
+// SyncResult holds the result of the sync operation
+type SyncResult struct {
+	Success      bool     `json:"success"`
+	Message      string   `json:"message"`
+	Logs         []string `json:"logs"`
+	TablesSynced int      `json:"tablesSynced"`
+	RowsInserted int      `json:"rowsInserted"`
+	RowsUpdated  int      `json:"rowsUpdated"`
+	RowsDeleted  int      `json:"rowsDeleted"`
+}
+
+type SyncEngine struct {
+	reporter Reporter
+}
+
+func NewSyncEngine(reporter Reporter) *SyncEngine {
+	return &SyncEngine{reporter: reporter}
+}
+
+// CompareAndSync performs the synchronization
+func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
+	result := SyncResult{Success: true, Logs: []string{}}
+	logger.Infof("开始数据同步：源=%s 目标=%s 表数量=%d", formatConnSummaryForSync(config.SourceConfig), formatConnSummaryForSync(config.TargetConfig), len(config.Tables))
+	totalTables := len(config.Tables)
+	s.progress(config.JobID, 0, totalTables, "", "开始同步")
+
+	contentRaw := strings.ToLower(strings.TrimSpace(config.Content))
+	syncSchema := false
+	syncData := true
+	switch contentRaw {
+	case "", "data":
+		syncData = true
+	case "schema":
+		syncSchema = true
+		syncData = false
+	case "both":
+		syncSchema = true
+		syncData = true
+	default:
+		s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("未知同步内容 %q，已自动使用仅同步数据", config.Content))
+		syncData = true
+	}
+
+	modeRaw := strings.ToLower(strings.TrimSpace(config.Mode))
+	if modeRaw != "" && modeRaw != "insert_update" && modeRaw != "insert_only" && modeRaw != "full_overwrite" {
+		s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("未知同步模式 %q，已自动使用 insert_update", config.Mode))
+	}
+	defaultMode := normalizeSyncMode(config.Mode)
+
+	contentLabel := "仅同步数据"
+	if syncSchema && syncData {
+		contentLabel = "同步结构+数据"
+	} else if syncSchema {
+		contentLabel = "仅同步结构"
+	}
+	s.appendLog(config.JobID, &result, "info", fmt.Sprintf("同步内容：%s；模式：%s；自动补字段：%v", contentLabel, defaultMode, config.AutoAddColumns))
+
+	sourceDB, err := db.NewDatabase(config.SourceConfig.Type)
+	if err != nil {
+		logger.Error(err, "初始化源数据库驱动失败：类型=%s", config.SourceConfig.Type)
+		return s.fail(config.JobID, totalTables, result, "初始化源数据库驱动失败: "+err.Error())
+	}
+	if config.SourceConfig.Type == "custom" {
+		// Custom DB setup would go here if needed
+	}
+
+	targetDB, err := db.NewDatabase(config.TargetConfig.Type)
+	if err != nil {
+		logger.Error(err, "初始化目标数据库驱动失败：类型=%s", config.TargetConfig.Type)
+		return s.fail(config.JobID, totalTables, result, "初始化目标数据库驱动失败: "+err.Error())
+	}
+
+	// Connect Source
+	s.appendLog(config.JobID, &result, "info", fmt.Sprintf("正在连接源数据库: %s...", config.SourceConfig.Host))
+	s.progress(config.JobID, 0, totalTables, "", "连接源数据库")
+	if err := sourceDB.Connect(config.SourceConfig); err != nil {
+		logger.Error(err, "源数据库连接失败：%s", formatConnSummaryForSync(config.SourceConfig))
+		return s.fail(config.JobID, totalTables, result, "源数据库连接失败: "+err.Error())
+	}
+	defer sourceDB.Close()
+
+	// Connect Target
+	s.appendLog(config.JobID, &result, "info", fmt.Sprintf("正在连接目标数据库: %s...", config.TargetConfig.Host))
+	s.progress(config.JobID, 0, totalTables, "", "连接目标数据库")
+	if err := targetDB.Connect(config.TargetConfig); err != nil {
+		logger.Error(err, "目标数据库连接失败：%s", formatConnSummaryForSync(config.TargetConfig))
+		return s.fail(config.JobID, totalTables, result, "目标数据库连接失败: "+err.Error())
+	}
+	defer targetDB.Close()
+
+	// Iterate Tables
+	for i, tableName := range config.Tables {
+		func() {
+			tableMode := defaultMode
+			s.appendLog(config.JobID, &result, "info", fmt.Sprintf("正在同步表: %s", tableName))
+			s.progress(config.JobID, i, totalTables, tableName, fmt.Sprintf("同步表(%d/%d)", i+1, totalTables))
+			defer s.progress(config.JobID, i+1, totalTables, tableName, "表处理完成")
+
+			if syncSchema {
+				s.progress(config.JobID, i, totalTables, tableName, "同步表结构")
+				if err := s.syncTableSchema(config, &result, sourceDB, targetDB, tableName); err != nil {
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("表结构同步失败：表=%s 错误=%v", tableName, err))
+					return
+				}
+			}
+			if !syncData {
+				result.TablesSynced++
+				return
+			}
+
+			sourceSchema, sourceTable := normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+			targetSchema, targetTable := normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+			sourceQueryTable := qualifiedNameForQuery(config.SourceConfig.Type, sourceSchema, sourceTable, tableName)
+			targetQueryTable := qualifiedNameForQuery(config.TargetConfig.Type, targetSchema, targetTable, tableName)
+
+			// 1. Get Columns & PKs
+			cols, err := sourceDB.GetColumns(sourceSchema, sourceTable)
+			if err != nil {
+				logger.Error(err, "获取源表列信息失败：表=%s", tableName)
+				s.appendLog(config.JobID, &result, "error", fmt.Sprintf("获取表 %s 的列信息失败: %v", tableName, err))
+				return
+			}
+			sourceColsByLower := make(map[string]connection.ColumnDefinition, len(cols))
+			for _, col := range cols {
+				if strings.TrimSpace(col.Name) == "" {
+					continue
+				}
+				sourceColsByLower[strings.ToLower(strings.TrimSpace(col.Name))] = col
+			}
+
+			pkCols := make([]string, 0, 2)
+			for _, col := range cols {
+				if col.Key == "PRI" || col.Key == "PK" {
+					pkCols = append(pkCols, col.Name)
+				}
+			}
+
+			if len(pkCols) == 0 {
+				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("表 %s 未找到主键，已跳过数据同步（避免产生重复数据）", tableName))
+				return
+			}
+			if len(pkCols) > 1 {
+				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("表 %s 为复合主键（%s），当前暂不支持数据同步", tableName, strings.Join(pkCols, ",")))
+				return
+			}
+			pkCol := pkCols[0]
+
+			opts := TableOptions{Insert: true, Update: true, Delete: false}
+			if config.TableOptions != nil {
+				if t, ok := config.TableOptions[tableName]; ok {
+					opts = t
+					// 默认防护：如用户未设置任意一个字段，保持 insert/update 默认 true、delete 默认 false
+					if !t.Insert && !t.Update && !t.Delete {
+						opts = t
+					}
+				}
+			}
+			if !opts.Insert && !opts.Update && !opts.Delete {
+				s.appendLog(config.JobID, &result, "info", fmt.Sprintf("表 %s 未勾选任何操作，已跳过", tableName))
+				return
+			}
+
+			// 2. Fetch Data (MEMORY INTENSIVE - PROTOTYPE ONLY)
+			// TODO: Implement paging/streaming
+			s.progress(config.JobID, i, totalTables, tableName, "读取源表数据")
+			sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.SourceConfig.Type, sourceQueryTable)))
+			if err != nil {
+				logger.Error(err, "读取源表失败：表=%s", tableName)
+				s.appendLog(config.JobID, &result, "error", fmt.Sprintf("读取源表 %s 失败: %v", tableName, err))
+				return
+			}
+
+			var inserts []map[string]interface{}
+			var updates []connection.UpdateRow
+
+			if tableMode == "insert_update" {
+				s.progress(config.JobID, i, totalTables, tableName, "读取目标表数据")
+				targetRows, _, err := targetDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.TargetConfig.Type, targetQueryTable)))
+				if err != nil {
+					logger.Error(err, "读取目标表失败：表=%s", tableName)
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("读取目标表 %s 失败: %v", tableName, err))
+					return
+				}
+
+				// 3. Compare (In-Memory Hash Map)
+				s.progress(config.JobID, i, totalTables, tableName, "对比差异")
+				targetMap := make(map[string]map[string]interface{})
+				for _, row := range targetRows {
+					if row[pkCol] == nil {
+						continue
+					}
+					pkVal := fmt.Sprintf("%v", row[pkCol])
+					if strings.TrimSpace(pkVal) == "" || pkVal == "<nil>" {
+						continue
+					}
+					targetMap[pkVal] = row
+				}
+				sourcePKSet := make(map[string]struct{}, len(sourceRows))
+
+				for _, sRow := range sourceRows {
+					if sRow[pkCol] == nil {
+						continue
+					}
+					pkVal := fmt.Sprintf("%v", sRow[pkCol])
+					if strings.TrimSpace(pkVal) == "" || pkVal == "<nil>" {
+						continue
+					}
+					sourcePKSet[pkVal] = struct{}{}
+
+					if tRow, exists := targetMap[pkVal]; exists {
+						changes := make(map[string]interface{})
+						for k, v := range sRow {
+							if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", tRow[k]) {
+								changes[k] = v
+							}
+						}
+						if len(changes) > 0 {
+							updates = append(updates, connection.UpdateRow{
+								Keys:   map[string]interface{}{pkCol: sRow[pkCol]},
+								Values: changes,
+							})
+						}
+					} else {
+						inserts = append(inserts, sRow)
+					}
+				}
+
+				var deletes []map[string]interface{}
+				if opts.Delete {
+					for pkStr, row := range targetMap {
+						if _, ok := sourcePKSet[pkStr]; ok {
+							continue
+						}
+						deletes = append(deletes, map[string]interface{}{pkCol: row[pkCol]})
+					}
+				}
+
+				// apply operation selection
+				inserts = filterRowsByPKSelection(pkCol, inserts, opts.Insert, opts.SelectedInsertPKs)
+				updates = filterUpdatesByPKSelection(pkCol, updates, opts.Update, opts.SelectedUpdatePKs)
+				deletes = filterRowsByPKSelection(pkCol, deletes, opts.Delete, opts.SelectedDeletePKs)
+
+				changeSet := connection.ChangeSet{
+					Inserts: inserts,
+					Updates: updates,
+					Deletes: deletes,
+				}
+
+				// 4. Align schema (target missing columns)
+				s.progress(config.JobID, i, totalTables, tableName, "检查字段一致性")
+				requiredCols := collectRequiredColumns(changeSet.Inserts, changeSet.Updates)
+				targetCols, err := targetDB.GetColumns(targetSchema, targetTable)
+				if err != nil {
+					s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 获取目标表字段失败，已跳过字段一致性检查: %v", err))
+				} else {
+					targetColSet := make(map[string]struct{}, len(targetCols))
+					for _, c := range targetCols {
+						name := strings.ToLower(strings.TrimSpace(c.Name))
+						if name == "" {
+							continue
+						}
+						targetColSet[name] = struct{}{}
+					}
+
+					missing := make([]string, 0)
+					for lower, original := range requiredCols {
+						if _, ok := targetColSet[lower]; !ok {
+							missing = append(missing, original)
+						}
+					}
+					sort.Strings(missing)
+
+					if len(missing) > 0 {
+						if config.AutoAddColumns && strings.ToLower(strings.TrimSpace(config.TargetConfig.Type)) == "mysql" {
+							s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 目标表缺少字段 %d 个，开始自动补齐: %s", len(missing), strings.Join(missing, ", ")))
+							added := 0
+							for _, colName := range missing {
+								colLower := strings.ToLower(strings.TrimSpace(colName))
+								colType := "TEXT"
+								if strings.ToLower(strings.TrimSpace(config.SourceConfig.Type)) == "mysql" {
+									if srcCol, ok := sourceColsByLower[colLower]; ok {
+										colType = sanitizeMySQLColumnType(srcCol.Type)
+									}
+								}
+
+								alterSQL := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+									quoteQualifiedIdentByType("mysql", targetQueryTable),
+									quoteIdentByType("mysql", colName),
+									colType,
+								)
+								if _, err := targetDB.Exec(alterSQL); err != nil {
+									s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 自动补字段失败：字段=%s 错误=%v", colName, err))
+									continue
+								}
+								added++
+							}
+							s.appendLog(config.JobID, &result, "info", fmt.Sprintf("  -> 自动补字段完成：成功=%d 失败=%d", added, len(missing)-added))
+
+							// refresh columns
+							targetCols, err = targetDB.GetColumns(targetSchema, targetTable)
+							if err == nil {
+								targetColSet = make(map[string]struct{}, len(targetCols))
+								for _, c := range targetCols {
+									name := strings.ToLower(strings.TrimSpace(c.Name))
+									if name == "" {
+										continue
+									}
+									targetColSet[name] = struct{}{}
+								}
+							}
+						} else {
+							s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 目标表缺少字段 %d 个（未开启自动补齐），将自动忽略：%s", len(missing), strings.Join(missing, ", ")))
+						}
+
+						// filter out still-missing columns to avoid apply failure
+						changeSet.Inserts = filterInsertRows(changeSet.Inserts, targetColSet)
+						changeSet.Updates = filterUpdateRows(changeSet.Updates, targetColSet)
+					}
+				}
+
+				// 5. Apply Changes
+				s.progress(config.JobID, i, totalTables, tableName, "应用变更")
+
+				if len(changeSet.Inserts) > 0 || len(changeSet.Updates) > 0 || len(changeSet.Deletes) > 0 {
+					s.appendLog(config.JobID, &result, "info", fmt.Sprintf("  -> 需插入: %d 行, 需更新: %d 行, 需删除: %d 行", len(changeSet.Inserts), len(changeSet.Updates), len(changeSet.Deletes)))
+
+					if applier, ok := targetDB.(db.BatchApplier); ok {
+						if err := applier.ApplyChanges(targetTable, changeSet); err != nil {
+							s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 应用变更失败: %v", err))
+						} else {
+							result.RowsInserted += len(changeSet.Inserts)
+							result.RowsUpdated += len(changeSet.Updates)
+							result.RowsDeleted += len(changeSet.Deletes)
+						}
+					} else {
+						s.appendLog(config.JobID, &result, "warn", "  -> 目标驱动不支持应用数据变更 (ApplyChanges).")
+					}
+				} else {
+					s.appendLog(config.JobID, &result, "info", "  -> 数据一致，无需变更.")
+				}
+
+				result.TablesSynced++
+				return
+			} else {
+				// insert_only / full_overwrite: do not compare target, just insert source rows
+				inserts = sourceRows
+			}
+
+			// full_overwrite: clear target table first
+			if tableMode == "full_overwrite" {
+				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 全量覆盖模式：即将清空目标表 %s", tableName))
+				s.progress(config.JobID, i, totalTables, tableName, "清空目标表")
+				clearSQL := ""
+				if strings.ToLower(strings.TrimSpace(config.TargetConfig.Type)) == "mysql" {
+					clearSQL = fmt.Sprintf("TRUNCATE TABLE %s", quoteQualifiedIdentByType(config.TargetConfig.Type, targetQueryTable))
+				} else {
+					clearSQL = fmt.Sprintf("DELETE FROM %s", quoteQualifiedIdentByType(config.TargetConfig.Type, targetQueryTable))
+				}
+				if _, err := targetDB.Exec(clearSQL); err != nil {
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 清空目标表失败: %v", err))
+					return
+				}
+			}
+
+			// 4. Align schema (target missing columns)
+			s.progress(config.JobID, i, totalTables, tableName, "检查字段一致性")
+			requiredCols := collectRequiredColumns(inserts, updates)
+			targetCols, err := targetDB.GetColumns(targetSchema, targetTable)
+			if err != nil {
+				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 获取目标表字段失败，已跳过字段一致性检查: %v", err))
+			} else {
+				targetColSet := make(map[string]struct{}, len(targetCols))
+				for _, c := range targetCols {
+					name := strings.ToLower(strings.TrimSpace(c.Name))
+					if name == "" {
+						continue
+					}
+					targetColSet[name] = struct{}{}
+				}
+
+				missing := make([]string, 0)
+				for lower, original := range requiredCols {
+					if _, ok := targetColSet[lower]; !ok {
+						missing = append(missing, original)
+					}
+				}
+				sort.Strings(missing)
+
+				if len(missing) > 0 {
+					if config.AutoAddColumns && strings.ToLower(strings.TrimSpace(config.TargetConfig.Type)) == "mysql" {
+						s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 目标表缺少字段 %d 个，开始自动补齐: %s", len(missing), strings.Join(missing, ", ")))
+						added := 0
+						for _, colName := range missing {
+							colLower := strings.ToLower(strings.TrimSpace(colName))
+							colType := "TEXT"
+							if strings.ToLower(strings.TrimSpace(config.SourceConfig.Type)) == "mysql" {
+								if srcCol, ok := sourceColsByLower[colLower]; ok {
+									colType = sanitizeMySQLColumnType(srcCol.Type)
+								}
+							}
+
+							alterSQL := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+								quoteQualifiedIdentByType("mysql", targetQueryTable),
+								quoteIdentByType("mysql", colName),
+								colType,
+							)
+							if _, err := targetDB.Exec(alterSQL); err != nil {
+								s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 自动补字段失败：字段=%s 错误=%v", colName, err))
+								continue
+							}
+							added++
+						}
+						s.appendLog(config.JobID, &result, "info", fmt.Sprintf("  -> 自动补字段完成：成功=%d 失败=%d", added, len(missing)-added))
+
+						// refresh columns
+						targetCols, err = targetDB.GetColumns(targetSchema, targetTable)
+						if err == nil {
+							targetColSet = make(map[string]struct{}, len(targetCols))
+							for _, c := range targetCols {
+								name := strings.ToLower(strings.TrimSpace(c.Name))
+								if name == "" {
+									continue
+								}
+								targetColSet[name] = struct{}{}
+							}
+						}
+					} else {
+						s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 目标表缺少字段 %d 个（未开启自动补齐），将自动忽略：%s", len(missing), strings.Join(missing, ", ")))
+					}
+
+					// filter out still-missing columns to avoid apply failure
+					inserts = filterInsertRows(inserts, targetColSet)
+					updates = filterUpdateRows(updates, targetColSet)
+				}
+			}
+
+			// 5. Apply Changes
+			s.progress(config.JobID, i, totalTables, tableName, "应用变更")
+			changeSet := connection.ChangeSet{
+				Inserts: inserts,
+				Updates: updates,
+			}
+
+			if len(changeSet.Inserts) > 0 || len(changeSet.Updates) > 0 {
+				s.appendLog(config.JobID, &result, "info", fmt.Sprintf("  -> 需插入: %d 行, 需更新: %d 行", len(changeSet.Inserts), len(changeSet.Updates)))
+
+				if applier, ok := targetDB.(db.BatchApplier); ok {
+					if err := applier.ApplyChanges(targetTable, changeSet); err != nil {
+						s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 应用变更失败: %v", err))
+					} else {
+						result.RowsInserted += len(changeSet.Inserts)
+						result.RowsUpdated += len(changeSet.Updates)
+					}
+				} else {
+					s.appendLog(config.JobID, &result, "warn", "  -> 目标驱动不支持应用数据变更 (ApplyChanges).")
+				}
+			} else {
+				s.appendLog(config.JobID, &result, "info", "  -> 数据一致，无需变更.")
+			}
+
+			result.TablesSynced++
+		}()
+	}
+
+	s.progress(config.JobID, totalTables, totalTables, "", "同步完成")
+	return result
+}
+
+func formatConnSummaryForSync(config connection.ConnectionConfig) string {
+	timeoutSeconds := config.Timeout
+	if timeoutSeconds <= 0 {
+		timeoutSeconds = 30
+	}
+
+	dbName := strings.TrimSpace(config.Database)
+	if dbName == "" {
+		dbName = "(default)"
+	}
+
+	return fmt.Sprintf("类型=%s 地址=%s:%d 数据库=%s 用户=%s 超时=%ds",
+		config.Type, config.Host, config.Port, dbName, config.User, timeoutSeconds)
+}
+
+func (s *SyncEngine) appendLog(jobID string, res *SyncResult, level string, msg string) {
+	if res != nil {
+		res.Logs = append(res.Logs, msg)
+	}
+	if s.reporter.OnLog != nil && strings.TrimSpace(jobID) != "" {
+		s.reporter.OnLog(SyncLogEvent{
+			JobID:   jobID,
+			Level:   level,
+			Message: msg,
+			Ts:      time.Now().UnixMilli(),
+		})
+	}
+}
+
+func (s *SyncEngine) progress(jobID string, current, total int, table string, stage string) {
+	if s.reporter.OnProgress == nil || strings.TrimSpace(jobID) == "" {
+		return
+	}
+	percent := 0
+	if total <= 0 {
+		if current > 0 {
+			percent = 100
+		}
+	} else {
+		if current < 0 {
+			current = 0
+		}
+		if current > total {
+			current = total
+		}
+		percent = (current * 100) / total
+	}
+	s.reporter.OnProgress(SyncProgressEvent{
+		JobID:   jobID,
+		Percent: percent,
+		Current: current,
+		Total:   total,
+		Table:   table,
+		Stage:   stage,
+	})
+}
+
+func (s *SyncEngine) fail(jobID string, totalTables int, res SyncResult, msg string) SyncResult {
+	res.Success = false
+	res.Message = msg
+	s.appendLog(jobID, &res, "error", "致命错误: "+msg)
+	s.progress(jobID, res.TablesSynced, totalTables, "", "同步失败")
+	return res
+}

internal/sync/sync_events.go

@@ -0,0 +1,30 @@
+package sync
+
+const (
+	EventSyncStart    = "sync:start"
+	EventSyncProgress = "sync:progress"
+	EventSyncLog      = "sync:log"
+	EventSyncDone     = "sync:done"
+)
+
+type SyncLogEvent struct {
+	JobID   string `json:"jobId"`
+	Level   string `json:"level"` // info/warn/error
+	Message string `json:"message"`
+	Ts      int64  `json:"ts"` // Unix milli
+}
+
+type SyncProgressEvent struct {
+	JobID   string `json:"jobId"`
+	Percent int    `json:"percent"`
+	Current int    `json:"current"` // 已完成表数
+	Total   int    `json:"total"`   // 总表数
+	Table   string `json:"table,omitempty"`
+	Stage   string `json:"stage,omitempty"`
+}
+
+type Reporter struct {
+	OnLog      func(event SyncLogEvent)
+	OnProgress func(event SyncProgressEvent)
+}
+

internal/sync/table_options.go

@@ -0,0 +1,13 @@
+package sync
+
+// TableOptions controls which operations to apply per table, and optional row selection.
+// 注意：如未指定 Selected*PKs，则表示“同步全部该类型差异数据”；如指定为空数组，则同样表示全部。
+type TableOptions struct {
+	Insert bool `json:"insert,omitempty"`
+	Update bool `json:"update,omitempty"`
+	Delete bool `json:"delete,omitempty"`
+
+	SelectedInsertPKs []string `json:"selectedInsertPks,omitempty"`
+	SelectedUpdatePKs []string `json:"selectedUpdatePks,omitempty"`
+	SelectedDeletePKs []string `json:"selectedDeletePks,omitempty"`
+}

main.go

@@ -4,6 +4,7 @@ import (
 	"embed"
 
 	"GoNavi-Wails/internal/app"
+	"GoNavi-Wails/internal/logger"
 
 	"github.com/wailsapp/wails/v2"
 	"github.com/wailsapp/wails/v2/pkg/options"
@@ -34,6 +35,6 @@ func main() {
 	})
 
 	if err != nil {
-		println("Error:", err.Error())
+		logger.Error(err, "应用启动失败")
 	}
 }