⚡️ perf(frontend): 大数据表格拖拽与打开加载性能

- 列宽拖拽改为 rAF + transform 更新幽灵线，降低 mousemove 负载
- 大结果集自动启用 antd Table virtual 渲染，减少 DOM 压力
- 打开表改为先查数据，COUNT(*) 后台统计并回填分页总数，避免长时间 loading
- 统一内部 rowKey 字段 __gonavi_row_key__，避免与业务字段 key 冲突

.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
@@ -49,32 +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")
           
+          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..."
           
-          echo "📦 正在生成 DMG: $DMG_NAME (源应用: $APP_NAME)..."
-          
-          # Create DMG
           create-dmg \
             --volname "GoNavi Installer" \
             --window-pos 200 120 \
@@ -86,24 +84,19 @@ jobs:
             "$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
@@ -112,14 +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

@@ -1,17 +1,27 @@
 # GoNavi - 现代化的轻量级数据库管理工具
 
-![GoNavi Banner](https://socialify.git.ci/yangguofeng/GoNavi/image?description=1&font=Inter&language=1&name=1&owner=1&pattern=Circuit%20Board&theme=Auto)
-
-[![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
@@ -65,7 +75,7 @@
 
 ```bash
 # 克隆项目
-git clone https://github.com/yangguofeng/GoNavi.git
+git clone https://github.com/Syngnat/GoNavi.git
 cd GoNavi
 
 # 启动开发服务器 (支持热重载)
@@ -93,6 +103,22 @@ wails build -clean
 
 ---
 
+## ❓ 常见问题 (Troubleshooting)
+
+### macOS 提示 "应用已损坏，无法打开"
+
+由于本项目尚未购买 Apple 开发者证书进行签名（Notarization），macOS 的 Gatekeeper 安全机制可能会拦截应用的运行。请按照以下步骤解决：
+
+1.  将下载的 `GoNavi.app` 拖入 **应用程序** 文件夹。
+2.  打开 **终端 (Terminal)**。
+3.  复制并执行以下命令（输入密码时不会显示）：
+    ```bash
+    sudo xattr -rd com.apple.quarantine /Applications/GoNavi.app
+    ```
+4.  或者：在 Finder 中右键点击应用图标，按住 `Control` 键选择 **打开**，然后在弹出的窗口中再次点击 **打开**。
+
+---
+
 ## 🤝 贡献指南
 
 欢迎提交 Issue 和 Pull Request！

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
+d0f9366af59a6367ad3c7e2d4185ead4

frontend/src/App.css

@@ -13,8 +13,15 @@ html, body, #root {
 .ant-tree .ant-tree-node-content-wrapper {
   display: flex !important;
   align-items: center;
-  overflow: hidden;
   white-space: nowrap;
+  user-select: none !important;
+  -webkit-user-select: none !important;
+}
+
+.ant-tree .ant-tree-title,
+.ant-tree .ant-tree-treenode * {
+  user-select: none !important;
+  -webkit-user-select: none !important;
 }
 
 .ant-tree .ant-tree-title {

frontend/src/App.tsx

@@ -1,9 +1,11 @@
 import React, { useState, useEffect } from 'react';
-import { Layout, Button, ConfigProvider, theme } from 'antd';
-import { PlusOutlined, BulbOutlined, BulbFilled, ConsoleSqlOutlined, BugOutlined } from '@ant-design/icons';
+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';
@@ -13,8 +15,90 @@ 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 } = useStore();
+  const { darkMode, toggleDarkMode, addTab, activeContext, connections, addConnection, tabs, activeTabId } = useStore();
+
+  const handleNewQuery = () => {
+      let connId = activeContext?.connectionId || '';
+      let db = activeContext?.dbName || '';
+
+      // Priority: Active Tab Context > Sidebar Selection
+      if (activeTabId) {
+          const currentTab = tabs.find(t => t.id === activeTabId);
+          if (currentTab && currentTab.connectionId) {
+              connId = currentTab.connectionId;
+              db = currentTab.dbName || '';
+          }
+      }
+
+      addTab({
+          id: `query-${Date.now()}`,
+          title: '新建查询',
+          type: 'query',
+          connectionId: connId,
+          dbName: db
+      });
+  };
+
+  const handleImportConnections = async () => {
+      const res = await (window as any).go.app.App.ImportConfigFile();
+      if (res.success) {
+          try {
+              const imported = JSON.parse(res.data);
+              if (Array.isArray(imported)) {
+                  let count = 0;
+                  imported.forEach((conn: any) => {
+                      if (!connections.some(c => c.id === conn.id)) {
+                          addConnection(conn);
+                          count++;
+                      }
+                  });
+                  message.success(`成功导入 ${count} 个连接`);
+              } else {
+                  message.error("文件格式错误：需要 JSON 数组");
+              }
+          } catch (e) {
+              message.error("解析 JSON 失败");
+          }
+      } else if (res.message !== "Cancelled") {
+          message.error("导入失败: " + res.message);
+      }
+  };
+
+  const handleExportConnections = async () => {
+      if (connections.length === 0) {
+          message.warning("没有连接可导出");
+          return;
+      }
+      const res = await (window as any).go.app.App.ExportData(connections, [], "connections", "json");
+      if (res.success) {
+          message.success("导出成功");
+      } else if (res.message !== "Cancelled") {
+          message.error("导出失败: " + res.message);
+      }
+  };
+
+  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',
+          icon: <UploadOutlined />,
+          onClick: handleImportConnections
+      },
+      {
+          key: 'export',
+          label: '导出连接配置',
+          icon: <DownloadOutlined />,
+          onClick: handleExportConnections
+      }
+  ];
 
   // Log Panel
   const [logPanelHeight, setLogPanelHeight] = useState(200);
@@ -141,6 +225,7 @@ function App() {
 
   return (
     <ConfigProvider
+        locale={zhCN}
         theme={{
             algorithm: darkMode ? theme.darkAlgorithm : theme.defaultAlgorithm,
         }}
@@ -151,40 +236,37 @@ function App() {
             width={sidebarWidth} 
             style={{ 
                 borderRight: darkMode ? '1px solid #303030' : '1px solid #f0f0f0', 
-                position: 'relative',
-                display: 'flex',
-                flexDirection: 'column'
+                position: 'relative'
             }}
           >
-            <div style={{ padding: '10px', borderBottom: darkMode ? '1px solid #303030' : '1px solid #f0f0f0', display: 'flex', justifyContent: 'space-between', alignItems: 'center', flexShrink: 0 }}>
-              <span style={{ fontWeight: 'bold', paddingLeft: 8 }}>GoNavi</span>
-              <div>
-                  <Button type="text" icon={darkMode ? <BulbFilled /> : <BulbOutlined />} onClick={toggleDarkMode} title="切换主题" />
-                  <Button type="text" icon={<ConsoleSqlOutlined />} onClick={() => addTab({
-                      id: `query-${Date.now()}`,
-                      title: '新建查询',
-                      type: 'query',
-                      connectionId: activeContext?.connectionId || '',
-                      dbName: activeContext?.dbName || ''
-                  })} title="新建查询" />
-                  <Button type="text" icon={<PlusOutlined />} onClick={() => setIsModalOpen(true)} title="新建连接" />
-              </div>
-            </div>
-            
-            <div style={{ flex: 1, overflow: 'hidden' }}>
-                <Sidebar onEditConnection={handleEditConnection} />
-            </div>
+            <div style={{ height: '100%', display: 'flex', flexDirection: 'column', overflow: 'hidden' }}>
+                <div style={{ padding: '10px', borderBottom: darkMode ? '1px solid #303030' : '1px solid #f0f0f0', display: 'flex', justifyContent: 'space-between', alignItems: 'center', flexShrink: 0 }}>
+                <span style={{ fontWeight: 'bold', paddingLeft: 8 }}>GoNavi</span>
+                <div>
+                    <Button type="text" icon={darkMode ? <BulbFilled /> : <BulbOutlined />} onClick={toggleDarkMode} title="切换主题" />
+                    <Button type="text" icon={<ConsoleSqlOutlined />} onClick={handleNewQuery} title="新建查询" />
+                    <Button type="text" icon={<PlusOutlined />} onClick={() => setIsModalOpen(true)} title="新建连接" />
+                    <Dropdown menu={{ items: settingsMenu }} placement="bottomRight">
+                        <Button type="text" icon={<SettingOutlined />} title="更多设置" />
+                    </Dropdown>
+                </div>
+                </div>
+                
+                <div style={{ flex: 1, overflow: 'hidden' }}>
+                    <Sidebar onEditConnection={handleEditConnection} />
+                </div>
 
-            {/* Sidebar Footer for Log Toggle */}
-            <div style={{ padding: '8px', borderTop: darkMode ? '1px solid #303030' : '1px solid #f0f0f0', display: 'flex', justifyContent: 'center' }}>
-                 <Button 
-                    type={isLogPanelOpen ? "primary" : "text"} 
-                    icon={<BugOutlined />} 
-                    onClick={() => setIsLogPanelOpen(!isLogPanelOpen)}
-                    block
-                 >
-                    SQL 执行日志
-                 </Button>
+                {/* Sidebar Footer for Log Toggle */}
+                <div style={{ padding: '8px', borderTop: darkMode ? '1px solid #303030' : '1px solid #f0f0f0', display: 'flex', justifyContent: 'center', flexShrink: 0 }}>
+                    <Button 
+                        type={isLogPanelOpen ? "primary" : "text"} 
+                        icon={<BugOutlined />} 
+                        onClick={() => setIsLogPanelOpen(!isLogPanelOpen)}
+                        block
+                    >
+                        SQL 执行日志
+                    </Button>
+                </div>
             </div>
             
             {/* Sidebar Resize Handle */}
@@ -220,6 +302,10 @@ function App() {
             onClose={handleCloseModal} 
             initialValues={editingConnection}
           />
+          <DataSyncModal
+            open={isSyncModalOpen}
+            onClose={() => setIsSyncModalOpen(false)}
+          />
           
           {/* Ghost Resize Line for Sidebar */}
           <div 

frontend/src/components/ConnectionModal.tsx

@@ -1,20 +1,31 @@
 import React, { useState, useEffect } from 'react';
-import { Modal, Form, Input, InputNumber, Button, message, Checkbox, Divider, Collapse, Select } 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 } 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);
   const updateConnection = useStore((state) => state.updateConnection);
 
   useEffect(() => {
       if (open) {
+          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,
@@ -23,16 +34,22 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
                   user: initialValues.config.user,
                   password: initialValues.config.password,
                   database: initialValues.config.database,
+                  includeDatabases: initialValues.includeDatabases,
                   useSSH: initialValues.config.useSSH,
                   sshHost: initialValues.config.ssh?.host,
                   sshPort: initialValues.config.ssh?.port,
                   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');
@@ -45,33 +62,17 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
       const values = await form.validateFields();
       setLoading(true);
       
-      const sshConfig = values.useSSH ? {
-          host: values.sshHost,
-          port: Number(values.sshPort),
-          user: values.sshUser,
-          password: values.sshPassword || "",
-          keyPath: values.sshKeyPath || ""
-      } : { host: "", port: 22, user: "", password: "", keyPath: "" };
-
-      const config = { 
-          type: values.type,
-          host: values.host,
-          port: Number(values.port || 0),
-          user: values.user || "",
-          password: values.password || "",
-          database: values.database || "",
-          useSSH: !!values.useSSH,
-          ssh: sshConfig
-      };
+      const config = await buildConfig(values);
       
-      const res = await MySQLConnect(config as any);
+      const res = await DBConnect(config as any);
       setLoading(false);
       
       if (res.success) {
         const newConn = {
           id: initialValues ? initialValues.id : Date.now().toString(),
           name: values.name || (values.type === 'sqlite' ? 'SQLite DB' : values.host),
-          config: config
+          config: config,
+          includeDatabases: values.includeDatabases
         };
 
         if (initialValues) {
@@ -85,6 +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);
@@ -94,44 +96,134 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
     }
   };
 
-  const isSqlite = dbType === 'sqlite';
+  const handleTest = async () => {
+      try {
+          const values = await form.validateFields();
+          setLoading(true);
+          setTestResult(null);
+          const config = await buildConfig(values);
+          const res = await TestConnection(config as any);
+          setLoading(false);
+          if (res.success) {
+              setTestResult({ type: 'success', message: res.message });
+              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);
+              }
+          } else {
+              setTestResult({ type: 'error', message: "测试失败: " + res.message });
+          }
+      } catch (e) {
+          setLoading(false);
+      }
+  };
 
-  return (
-    <Modal 
-        title={initialValues ? "编辑连接" : "新建连接"}
-        open={open} 
-        onCancel={onClose} 
-        onOk={handleOk} 
-        confirmLoading={loading} 
-        okText="确定" 
-        cancelText="取消" 
-        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
-    >
+  const buildConfig = async (values: any) => {
+      const sshConfig = values.useSSH ? {
+          host: values.sshHost,
+          port: Number(values.sshPort),
+          user: values.sshUser,
+          password: values.sshPassword || "",
+          keyPath: values.sshKeyPath || ""
+      } : { host: "", port: 22, user: "", password: "", keyPath: "" };
+
+      return { 
+          type: values.type,
+          host: values.host || "",
+          port: Number(values.port || 0),
+          user: values.user || "",
+          password: values.password || "",
+          database: values.database || "",
+          useSSH: !!values.useSSH,
+          ssh: sshConfig,
+          driver: values.driver,
+          dsn: values.dsn,
+          timeout: Number(values.timeout || 30)
+      };
+  };
+
+  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 });
+      }
+
+      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"} />
@@ -155,8 +247,10 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
         )}
         
         {!isSqlite && (
-        <Form.Item name="database" label="默认数据库 (可选)">
-            <Input />
+        <Form.Item name="includeDatabases" label="显示数据库 (留空显示全部)" help="连接测试成功后可选择">
+            <Select mode="multiple" placeholder="选择显示的数据库" allowClear>
+                {dbList.map(db => <Select.Option key={db} value={db}>{db}</Select.Option>)}
+            </Select>
         </Form.Item>
         )}
 
@@ -190,11 +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>
+                    )
+                }]}
+            />
         </>
         )}
+        </>
+        )}
+        
+        {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/DataGrid.tsx

@@ -2,19 +2,27 @@ import React, { useState, useEffect, useRef, useContext, useMemo, useCallback }
 import { Table, message, Input, Button, Dropdown, MenuProps, Form, Pagination, Select, Modal } from 'antd';
 import type { SortOrder } from 'antd/es/table/interface';
 import { ReloadOutlined, ImportOutlined, ExportOutlined, DownOutlined, PlusOutlined, DeleteOutlined, SaveOutlined, UndoOutlined, FilterOutlined, CloseOutlined, ConsoleSqlOutlined, FileTextOutlined, CopyOutlined, ClearOutlined } from '@ant-design/icons';
-import { Resizable } from 'react-resizable';
 import { ImportData, ExportTable, ExportData, ApplyChanges } from '../../wailsjs/go/app/App';
 import { useStore } from '../store';
+import { v4 as uuidv4 } from 'uuid';
 import 'react-resizable/css/styles.css';
 
+// 内部行标识字段：避免与真实业务字段（如 `key` 列）冲突。
+export const GONAVI_ROW_KEY = '__gonavi_row_key__';
+
+// Normalize RFC3339-like datetime strings to `YYYY-MM-DD HH:mm:ss` for display/editing.
+const normalizeDateTimeString = (val: string) => {
+    const match = val.match(/^(\d{4}-\d{2}-\d{2})T(\d{2}:\d{2}:\d{2})/);
+    if (!match) return val;
+    return `${match[1]} ${match[2]}`;
+};
+
 // --- Helper: Format Value ---
 const formatCellValue = (val: any) => {
     if (val === null) return <span style={{ color: '#ccc' }}>NULL</span>;
     if (typeof val === 'object') return JSON.stringify(val);
     if (typeof val === 'string') {
-        if (/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}/.test(val)) {
-            return val.replace('T', ' ').replace(/\+.*$/, '').replace(/Z$/, '');
-        }
+        return normalizeDateTimeString(val);
     }
     return String(val);
 };
@@ -67,7 +75,6 @@ const DataContext = React.createContext<{
 } | null>(null);
 
 interface Item {
-  key: string;
   [key: string]: any;
 }
 
@@ -102,13 +109,15 @@ const EditableCell: React.FC<EditableCellProps> = React.memo(({
 
   const toggleEdit = () => {
     setEditing(!editing);
-    form.setFieldsValue({ [dataIndex]: record[dataIndex] });
+    const raw = record[dataIndex];
+    const initialValue = typeof raw === 'string' ? normalizeDateTimeString(raw) : raw;
+    form.setFieldsValue({ [dataIndex]: initialValue });
   };
 
   const save = async () => {
     try {
       if (!form) return;
-      const values = await form.validateFields();
+      const values = await form.validateFields([dataIndex]);
       toggleEdit();
       handleSave({ ...record, ...values });
     } catch (errInfo) {
@@ -133,8 +142,7 @@ const EditableCell: React.FC<EditableCellProps> = React.memo(({
   return <td {...restProps} onDoubleClick={editable ? toggleEdit : undefined}>{childNode}</td>;
 });
 
-const ContextMenuRow = React.memo(({ children, ...props }: any) => {
-    const record = props.record; 
+const ContextMenuRow = React.memo(({ children, record, ...props }: any) => {
     const context = useContext(DataContext);
     
     if (!record || !context) return <tr {...props}>{children}</tr>;
@@ -143,8 +151,9 @@ const ContextMenuRow = React.memo(({ children, ...props }: any) => {
 
     const getTargets = () => {
         const keys = selectedRowKeysRef.current;
-        if (keys.includes(record.key)) {
-            return displayDataRef.current.filter(d => keys.includes(d.key));
+        const recordKey = record?.[GONAVI_ROW_KEY];
+        if (recordKey !== undefined && keys.includes(recordKey)) {
+            return displayDataRef.current.filter(d => keys.includes(d?.[GONAVI_ROW_KEY]));
         }
         return [record];
     };
@@ -161,7 +170,7 @@ const ContextMenuRow = React.memo(({ children, ...props }: any) => {
         { key: 'copy', label: '复制为 Markdown', icon: <CopyOutlined />, onClick: () => { 
             const records = getTargets();
             const lines = records.map((r: any) => {
-                const { key, ...vals } = r;
+                const { [GONAVI_ROW_KEY]: _rowKey, ...vals } = r;
                 return `| ${Object.values(vals).join(' | ')} |`;
             });
             copyToClipboard(lines.join('\n'));
@@ -199,7 +208,7 @@ interface DataGridProps {
     onReload?: () => void;
     onSort?: (field: string, order: string) => void;
     onPageChange?: (page: number, size: number) => void;
-    pagination?: { current: number, pageSize: number, total: number };
+    pagination?: { current: number, pageSize: number, total: number, totalKnown?: boolean };
     // Filtering
     showFilter?: boolean;
     onToggleFilter?: () => void;
@@ -214,11 +223,12 @@ const DataGrid: React.FC<DataGridProps> = ({
   const addSqlLog = useStore(state => state.addSqlLog);
   const [form] = Form.useForm();
   const [modal, contextHolder] = Modal.useModal();
+  const gridId = useMemo(() => `grid-${uuidv4()}`, []);
   
   // Helper to export specific data
   const exportData = async (rows: any[], format: string) => {
       const hide = message.loading(`正在导出 ${rows.length} 条数据...`, 0);
-      const cleanRows = rows.map(({ key, ...rest }) => rest);
+      const cleanRows = rows.map(({ [GONAVI_ROW_KEY]: _rowKey, ...rest }) => rest);
       // Pass tableName (or 'export') as default filename
       const res = await ExportData(cleanRows, columnNames, tableName || 'export', format);
       hide();
@@ -234,22 +244,32 @@ const DataGrid: React.FC<DataGridProps> = ({
 
   useEffect(() => {
       if (!containerRef.current) return;
+      
+      let rafId: number;
       const resizeObserver = new ResizeObserver(entries => {
-          for (let entry of entries) {
-              // Subtract header height (~40px)
-              // Ensure minimum height to prevent collapse loop
-              const h = Math.max(100, entry.contentRect.height - 42); 
-              setTableHeight(h); 
-          }
+          rafId = requestAnimationFrame(() => {
+              for (let entry of entries) {
+                  // Use boundingClientRect for more accurate render size (including padding if any)
+                  const height = entry.contentRect.height;
+                  if (height < 50) return; 
+                  // Subtract header (~42px) and a buffer
+                  const h = Math.max(100, height - 42); 
+                  setTableHeight(h); 
+              }
+          });
       });
+      
       resizeObserver.observe(containerRef.current);
-      return () => resizeObserver.disconnect();
+      return () => {
+          resizeObserver.disconnect();
+          cancelAnimationFrame(rafId);
+      };
   }, []);
 
   const [selectedRowKeys, setSelectedRowKeys] = useState<React.Key[]>([]);
   const [addedRows, setAddedRows] = useState<any[]>([]);
   const [modifiedRows, setModifiedRows] = useState<Record<string, any>>({});
-  const [deletedRowKeys, setDeletedRowKeys] = useState<Set<React.Key>>(new Set());
+  const [deletedRowKeys, setDeletedRowKeys] = useState<Set<string>>(new Set());
 
   // Filter State
   const [filterConditions, setFilterConditions] = useState<{ id: number, column: string, op: string, value: string }[]>([]);
@@ -266,10 +286,16 @@ const DataGrid: React.FC<DataGridProps> = ({
       setModifiedRows({});
       setDeletedRowKeys(new Set());
       setSelectedRowKeys([]);
+      form.resetFields();
   }, [tableName, dbName, connectionId]); // Reset on context change
 
+  const rowKeyStr = useCallback((k: React.Key) => String(k), []);
+
   const displayData = useMemo(() => {
-      return [...data, ...addedRows].filter(item => !deletedRowKeys.has(item.key));
+      return [...data, ...addedRows].filter(item => {
+          const k = item?.[GONAVI_ROW_KEY];
+          return k === undefined ? true : !deletedRowKeys.has(rowKeyStr(k));
+      });
   }, [data, addedRows, deletedRowKeys]);
 
   useEffect(() => { displayDataRef.current = displayData; }, [displayData]);
@@ -292,10 +318,21 @@ const DataGrid: React.FC<DataGridProps> = ({
     const draggingRef = useRef<{
         startX: number,
         startWidth: number,
-        key: string
+        key: string,
+        containerLeft: number
     } | null>(null);
     const ghostRef = useRef<HTMLDivElement>(null);
+    const resizeRafRef = useRef<number | null>(null);
+    const latestClientXRef = useRef<number | null>(null);
     const isResizingRef = useRef(false); // Lock for sorting
+
+    const flushGhostPosition = useCallback(() => {
+        resizeRafRef.current = null;
+        if (!draggingRef.current || !ghostRef.current) return;
+        if (latestClientXRef.current === null) return;
+        const relativeLeft = latestClientXRef.current - draggingRef.current.containerLeft;
+        ghostRef.current.style.transform = `translateX(${relativeLeft}px)`;
+    }, []);
   
         // 1. Drag Start
   
@@ -315,21 +352,18 @@ const DataGrid: React.FC<DataGridProps> = ({
   
             const currentWidth = columnWidths[key] || 200; 
   
-            
+            const containerLeft = containerRef.current?.getBoundingClientRect().left ?? 0;
   
-            draggingRef.current = { startX, startWidth: currentWidth, key };
+            draggingRef.current = { startX, startWidth: currentWidth, key, containerLeft };
+            latestClientXRef.current = startX;
   
       
   
             // Show Ghost Line at initial position
   
             if (ghostRef.current && containerRef.current) {
-  
-                const containerRect = containerRef.current.getBoundingClientRect();
-  
-                const relativeLeft = startX - containerRect.left;
-  
-                ghostRef.current.style.left = `${relativeLeft}px`;
+                const relativeLeft = startX - containerLeft;
+                ghostRef.current.style.transform = `translateX(${relativeLeft}px)`;
   
                 ghostRef.current.style.display = 'block';
   
@@ -351,13 +385,11 @@ const DataGrid: React.FC<DataGridProps> = ({
 
   // 2. Drag Move (Global)
   const handleResizeMove = useCallback((e: MouseEvent) => {
-      if (!draggingRef.current || !ghostRef.current || !containerRef.current) return;
-
-      // Update Ghost Line Position directly
-      const containerRect = containerRef.current.getBoundingClientRect();
-      const relativeLeft = e.clientX - containerRect.left;
-      ghostRef.current.style.left = `${relativeLeft}px`;
-  }, []);
+      if (!draggingRef.current) return;
+      latestClientXRef.current = e.clientX;
+      if (resizeRafRef.current !== null) return;
+      resizeRafRef.current = requestAnimationFrame(flushGhostPosition);
+  }, [flushGhostPosition]);
 
   // 3. Drag Stop (Global)
   const handleResizeStop = useCallback((e: MouseEvent) => {
@@ -371,6 +403,11 @@ const DataGrid: React.FC<DataGridProps> = ({
       setColumnWidths(prev => ({ ...prev, [key]: newWidth }));
 
       // Cleanup
+      if (resizeRafRef.current !== null) {
+          cancelAnimationFrame(resizeRafRef.current);
+          resizeRafRef.current = null;
+      }
+      latestClientXRef.current = null;
       if (ghostRef.current) ghostRef.current.style.display = 'none';
       document.removeEventListener('mousemove', handleResizeMove);
       document.removeEventListener('mouseup', handleResizeStop);
@@ -393,11 +430,13 @@ const DataGrid: React.FC<DataGridProps> = ({
       // So we update 'modifiedRows'.
       
       // Check if it's an added row
-      const isAdded = addedRows.some(r => r.key === row.key);
+      const rowKey = row?.[GONAVI_ROW_KEY];
+      if (rowKey === undefined) return;
+      const isAdded = addedRows.some(r => r?.[GONAVI_ROW_KEY] === rowKey);
       if (isAdded) {
-          setAddedRows(prev => prev.map(r => r.key === row.key ? { ...r, ...row } : r));
+          setAddedRows(prev => prev.map(r => r?.[GONAVI_ROW_KEY] === rowKey ? { ...r, ...row } : r));
       } else {
-          setModifiedRows(prev => ({ ...prev, [row.key]: row }));
+          setModifiedRows(prev => ({ ...prev, [rowKeyStr(rowKey)]: row }));
       }
   }, [addedRows]);
 
@@ -406,8 +445,9 @@ const DataGrid: React.FC<DataGridProps> = ({
   // We need to merge modifiedRows into it for rendering.
   const mergedDisplayData = useMemo(() => {
       return displayData.map(row => {
-          if (modifiedRows[row.key]) {
-              return { ...row, ...modifiedRows[row.key] };
+          const k = row?.[GONAVI_ROW_KEY];
+          if (k !== undefined && modifiedRows[rowKeyStr(k)]) {
+              return { ...row, ...modifiedRows[rowKeyStr(k)] };
           }
           return row;
       });
@@ -447,7 +487,7 @@ const DataGrid: React.FC<DataGridProps> = ({
 
   const handleAddRow = () => {
       const newKey = `new-${Date.now()}`;
-      const newRow: any = { key: newKey };
+      const newRow: any = { [GONAVI_ROW_KEY]: newKey };
       columnNames.forEach(col => newRow[col] = ''); 
       setAddedRows(prev => [...prev, newRow]);
   };
@@ -455,7 +495,7 @@ const DataGrid: React.FC<DataGridProps> = ({
   const handleDeleteSelected = () => {
       setDeletedRowKeys(prev => {
           const newDeleted = new Set(prev);
-          selectedRowKeys.forEach(key => newDeleted.add(key));
+          selectedRowKeys.forEach(key => newDeleted.add(rowKeyStr(key)));
           return newDeleted;
       });
       setSelectedRowKeys([]);
@@ -470,27 +510,27 @@ const DataGrid: React.FC<DataGridProps> = ({
       const updates: any[] = [];
       const deletes: any[] = [];
 
-      addedRows.forEach(row => { const { key, ...vals } = row; inserts.push(vals); });
-      deletedRowKeys.forEach(key => {
+      addedRows.forEach(row => { const { [GONAVI_ROW_KEY]: _rowKey, ...vals } = row; inserts.push(vals); });
+      deletedRowKeys.forEach(keyStr => {
           // Find original data
-          const originalRow = data.find(d => d.key === key) || addedRows.find(d => d.key === key);
+          const originalRow = data.find(d => rowKeyStr(d?.[GONAVI_ROW_KEY]) === keyStr) || addedRows.find(d => rowKeyStr(d?.[GONAVI_ROW_KEY]) === keyStr);
           if (originalRow) {
               const pkData: any = {};
               if (pkColumns.length > 0) pkColumns.forEach(k => pkData[k] = originalRow[k]);
-              else { const { key: _, ...rest } = originalRow; Object.assign(pkData, rest); }
+              else { const { [GONAVI_ROW_KEY]: _rowKey, ...rest } = originalRow; Object.assign(pkData, rest); }
               deletes.push(pkData);
           }
       });
-      Object.entries(modifiedRows).forEach(([key, newRow]) => {
-          if (deletedRowKeys.has(key)) return;
-          const originalRow = data.find(d => d.key === key);
+      Object.entries(modifiedRows).forEach(([keyStr, newRow]) => {
+          if (deletedRowKeys.has(keyStr)) return;
+          const originalRow = data.find(d => rowKeyStr(d?.[GONAVI_ROW_KEY]) === keyStr);
           if (!originalRow) return; // Should not happen for modified rows unless deleted
           
           const pkData: any = {};
           if (pkColumns.length > 0) pkColumns.forEach(k => pkData[k] = originalRow[k]);
-          else { const { key: _, ...rest } = originalRow; Object.assign(pkData, rest); }
+          else { const { [GONAVI_ROW_KEY]: _rowKey, ...rest } = originalRow; Object.assign(pkData, rest); }
           
-          const { key: _, ...vals } = newRow;
+          const { [GONAVI_ROW_KEY]: _rowKey, ...vals } = newRow;
           updates.push({ keys: pkData, values: vals });
       });
 
@@ -555,8 +595,9 @@ const DataGrid: React.FC<DataGridProps> = ({
   const getTargets = useCallback((clickedRecord: any) => {
       const selKeys = selectedRowKeysRef.current;
       const currentData = displayDataRef.current;
-      if (selKeys.includes(clickedRecord.key)) {
-          return currentData.filter(d => selKeys.includes(d.key));
+      const clickedKey = clickedRecord?.[GONAVI_ROW_KEY];
+      if (clickedKey !== undefined && selKeys.includes(clickedKey)) {
+          return currentData.filter(d => selKeys.includes(d?.[GONAVI_ROW_KEY]));
       }
       return [clickedRecord];
   }, []);
@@ -564,7 +605,7 @@ const DataGrid: React.FC<DataGridProps> = ({
   const handleCopyInsert = useCallback((record: any) => {
       const records = getTargets(record);
       const sqls = records.map((r: any) => {
-          const { key, ...vals } = r;
+          const { [GONAVI_ROW_KEY]: _rowKey, ...vals } = r;
           const cols = Object.keys(vals);
           const values = Object.values(vals).map(v => v === null ? 'NULL' : `'${v}'`); 
           const targetTable = tableName || 'table';
@@ -576,7 +617,7 @@ const DataGrid: React.FC<DataGridProps> = ({
   const handleCopyJson = useCallback((record: any) => {
       const records = getTargets(record);
       const cleanRecords = records.map((r: any) => {
-          const { key, ...rest } = r;
+          const { [GONAVI_ROW_KEY]: _rowKey, ...rest } = r;
           return rest;
       });
       copyToClipboard(JSON.stringify(cleanRecords, null, 2));
@@ -585,7 +626,7 @@ const DataGrid: React.FC<DataGridProps> = ({
   const handleCopyCsv = useCallback((record: any) => {
       const records = getTargets(record);
       const lines = records.map((r: any) => {
-          const { key, ...vals } = r;
+          const { [GONAVI_ROW_KEY]: _rowKey, ...vals } = r;
           const values = Object.values(vals).map(v => v === null ? 'NULL' : `"${v}"`);
           return values.join(',');
       });
@@ -604,7 +645,7 @@ const DataGrid: React.FC<DataGridProps> = ({
       
       // 1. Export Selected
       if (selectedRowKeys.length > 0) {
-          const selectedRows = displayData.filter(d => selectedRowKeys.includes(d.key));
+          const selectedRows = displayData.filter(d => selectedRowKeys.includes(d?.[GONAVI_ROW_KEY]));
           await exportData(selectedRows, format);
           return;
       }
@@ -683,9 +724,10 @@ const DataGrid: React.FC<DataGridProps> = ({
   }), []); 
 
   const totalWidth = columns.reduce((sum, col) => sum + (col.width as number || 200), 0);
+  const enableVirtual = mergedDisplayData.length >= 200;
 
   return (
-    <div style={{ height: '100%', overflow: 'hidden', padding: 0, display: 'flex', flexDirection: 'column' }}>
+    <div className={gridId} style={{ height: '100%', overflow: 'hidden', padding: 0, display: 'flex', flexDirection: 'column', minHeight: 0 }}>
        {/* Toolbar */}
        <div style={{ padding: '8px', borderBottom: '1px solid #eee', display: 'flex', gap: 8, alignItems: 'center' }}>
            {onReload && <Button icon={<ReloadOutlined />} onClick={() => {
@@ -747,7 +789,7 @@ const DataGrid: React.FC<DataGridProps> = ({
            </div>
        )}
 
-       <div ref={containerRef} style={{ flex: 1, overflow: 'hidden', position: 'relative' }}>
+       <div ref={containerRef} style={{ flex: 1, overflow: 'hidden', position: 'relative', minHeight: 0 }}>
         {contextHolder}
         <Form component={false} form={form}>
             <DataContext.Provider value={{ selectedRowKeysRef, displayDataRef, handleCopyInsert, handleCopyJson, handleCopyCsv, handleExportSelected, copyToClipboard, tableName }}>
@@ -758,7 +800,9 @@ const DataGrid: React.FC<DataGridProps> = ({
                         columns={mergedColumns} 
                         size="small" 
                         scroll={{ x: Math.max(totalWidth, 1000), y: tableHeight }}
+                        virtual={enableVirtual}
                         loading={loading}
+                        rowKey={GONAVI_ROW_KEY}
                         pagination={false} 
                         onChange={handleTableChange}
                         bordered
@@ -767,8 +811,9 @@ const DataGrid: React.FC<DataGridProps> = ({
                             onChange: setSelectedRowKeys,
                         }}
                         rowClassName={(record) => {
-                            if (addedRows.some(r => r.key === record.key)) return 'row-added';
-                            if (modifiedRows[record.key] || deletedRowKeys.has(record.key)) return 'row-modified'; // deleted won't show
+                            const k = record?.[GONAVI_ROW_KEY];
+                            if (k !== undefined && addedRows.some(r => r?.[GONAVI_ROW_KEY] === k)) return 'row-added';
+                            if (k !== undefined && (modifiedRows[rowKeyStr(k)] || deletedRowKeys.has(rowKeyStr(k)))) return 'row-modified'; // deleted won't show
                             return '';
                         }}
                         onRow={(record) => ({ record } as any)}
@@ -780,11 +825,15 @@ const DataGrid: React.FC<DataGridProps> = ({
        
        {pagination && (
            <div style={{ padding: '8px', borderTop: '1px solid #eee', display: 'flex', justifyContent: 'flex-end', background: '#fff' }}>
-               <Pagination 
+                   <Pagination 
                    current={pagination.current}
                    pageSize={pagination.pageSize}
                    total={pagination.total}
-                   showTotal={(total, range) => `当前 ${range[1] - range[0] + 1} 条 / 共 ${total} 条`}
+                   showTotal={(total, range) => {
+                       const currentCount = Math.max(0, range[1] - range[0] + 1);
+                       if (pagination.totalKnown === false) return `当前 ${currentCount} 条 / 正在统计总数...`;
+                       return `当前 ${currentCount} 条 / 共 ${total} 条`;
+                   }}
                    showSizeChanger
                    pageSizeOptions={['100', '200', '500', '1000']}
                    onChange={onPageChange}
@@ -794,9 +843,9 @@ const DataGrid: React.FC<DataGridProps> = ({
        )}
 
        <style>{`
-           .row-added td { background-color: #f6ffed !important; }
-           .row-modified td { background-color: #e6f7ff !important; }
-           .ant-table-body {
+           .${gridId} .row-added td { background-color: #f6ffed !important; }
+           .${gridId} .row-modified td { background-color: #e6f7ff !important; }
+           .${gridId} .ant-table-body {
                height: ${tableHeight}px !important;
                max-height: ${tableHeight}px !important;
            }
@@ -809,11 +858,13 @@ const DataGrid: React.FC<DataGridProps> = ({
                position: 'absolute',
                top: 0,
                bottom: 0, // Fits container height
+               left: 0,
                width: '2px',
                background: '#1890ff',
                zIndex: 9999,
                display: 'none',
-               pointerEvents: 'none'
+               pointerEvents: 'none',
+               willChange: 'transform'
            }}
        />
     </div>

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 +1,9 @@
-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';
 
 const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   const [data, setData] = useState<any[]>([]);
@@ -11,11 +11,15 @@ 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 [pagination, setPagination] = useState({
       current: 1,
       pageSize: 100,
-      total: 0
+      total: 0,
+      totalKnown: false
   });
 
   const [sortInfo, setSortInfo] = useState<{ columnKey: string, order: string } | null>(null);
@@ -24,11 +28,12 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   const [filterConditions, setFilterConditions] = useState<any[]>([]);
 
   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;
     }
 
@@ -41,6 +46,20 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
         ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
     };
 
+    const quoteIdentPart = (ident: string) => {
+        if (!ident) return ident;
+        if (config.type === 'mysql') return `\`${ident.replace(/`/g, '``')}\``;
+        return `"${ident.replace(/"/g, '""')}"`;
+    };
+    const quoteQualifiedIdent = (ident: string) => {
+        const raw = (ident || '').trim();
+        if (!raw) return raw;
+        const parts = raw.split('.').filter(Boolean);
+        if (parts.length <= 1) return quoteIdentPart(raw);
+        return parts.map(quoteIdentPart).join('.');
+    };
+    const escapeLiteral = (val: string) => val.replace(/'/g, "''");
+
     const dbName = tab.dbName || '';
     const tableName = tab.tableName || '';
 
@@ -48,47 +67,37 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
     filterConditions.forEach(cond => {
         if (cond.column && cond.value) {
             if (cond.op === 'LIKE') {
-                whereParts.push(`\`${cond.column}\` LIKE '%${cond.value}%'`);
+                whereParts.push(`${quoteIdentPart(cond.column)} LIKE '%${escapeLiteral(cond.value)}%'`);
             } else {
-                whereParts.push(`\`${cond.column}\` ${cond.op} '${cond.value}'`);
+                whereParts.push(`${quoteIdentPart(cond.column)} ${cond.op} '${escapeLiteral(cond.value)}'`);
             }
         }
     });
     const whereSQL = whereParts.length > 0 ? `WHERE ${whereParts.join(' AND ')}` : "";
 
-    const countSql = `SELECT COUNT(*) as total FROM \`${tableName}\` ${whereSQL}`;
+    const countSql = `SELECT COUNT(*) as total FROM ${quoteQualifiedIdent(tableName)} ${whereSQL}`;
     
-    let sql = `SELECT * FROM \`${tableName}\` ${whereSQL}`;
+    let sql = `SELECT * FROM ${quoteQualifiedIdent(tableName)} ${whereSQL}`;
     if (sortInfo && sortInfo.order) {
-        sql += ` ORDER BY \`${sortInfo.columnKey}\` ${sortInfo.order === 'ascend' ? 'ASC' : 'DESC'}`;
+        sql += ` ORDER BY ${quoteIdentPart(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;
+        const pData = DBQuery(config as any, dbName, sql);
+
+        let pCols: Promise<any> | null = null;
         if (pkColumns.length === 0) {
              pCols = DBGetColumns(config as any, dbName, tableName);
         }
 
-        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(),
@@ -108,28 +117,81 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
             }
         }
 
-        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 +203,7 @@ 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 +213,10 @@ 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 +227,7 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
   }, [tab, sortInfo, filterConditions]); // Initial load and re-load on sort/filter
 
   return (
+    <div style={{ height: '100%', width: '100%', overflow: 'hidden' }}>
       <DataGrid
           data={data}
           columnNames={columnNames}
@@ -178,7 +244,8 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
           onToggleFilter={handleToggleFilter}
           onApplyFilter={handleApplyFilter}
       />
+    </div>
   );
 };
 
-export default DataViewer;
+export default DataViewer;

frontend/src/components/QueryEditor.tsx

@@ -5,8 +5,8 @@ import { PlayCircleOutlined, SaveOutlined, FormatPainterOutlined, SettingOutline
 import { format } from 'sql-formatter';
 import { TabData, ColumnDefinition } from '../types';
 import { useStore } from '../store';
-import { MySQLQuery, DBGetTables, DBGetAllColumns, MySQLGetDatabases, DBGetColumns } from '../../wailsjs/go/app/App';
-import DataGrid from './DataGrid';
+import { DBQuery, DBGetTables, DBGetAllColumns, DBGetDatabases, DBGetColumns } from '../../wailsjs/go/app/App';
+import DataGrid, { GONAVI_ROW_KEY } from './DataGrid';
 
 const QueryEditor: React.FC<{ tab: TabData }> = ({ tab }) => {
   const [query, setQuery] = useState(tab.query || 'SELECT * FROM ');
@@ -60,7 +60,7 @@ const QueryEditor: React.FC<{ tab: TabData }> = ({ tab }) => {
             ssh: conn.config.ssh || { host: "", port: 22, user: "", password: "", keyPath: "" }
           };
 
-          const res = await MySQLGetDatabases(config as any);
+          const res = await DBGetDatabases(config as any);
           if (res.success && Array.isArray(res.data)) {
               const dbs = res.data.map((row: any) => row.Database || row.database);
               setDbList(dbs);
@@ -252,7 +252,7 @@ const QueryEditor: React.FC<{ tab: TabData }> = ({ tab }) => {
 
     const startTime = Date.now();
     try {
-        const res = await MySQLQuery(config as any, currentDb, query);
+        const res = await DBQuery(config as any, currentDb, query);
         const duration = Date.now() - startTime;
         
         addSqlLog({
@@ -271,7 +271,11 @@ const QueryEditor: React.FC<{ tab: TabData }> = ({ tab }) => {
             if (res.data.length > 0) {
                 const cols = Object.keys(res.data[0]);
                 setColumnNames(cols);
-                setResults(res.data.map((row: any, i: number) => ({ ...row, key: i })));
+                const rows = res.data as any[];
+                rows.forEach((row: any, i: number) => {
+                    if (row && typeof row === 'object') row[GONAVI_ROW_KEY] = i;
+                });
+                setResults(rows);
             } else {
                 message.info('查询执行成功，但没有返回结果。');
                 setResults([]);
@@ -421,4 +425,4 @@ const QueryEditor: React.FC<{ tab: TabData }> = ({ tab }) => {
   );
 };
 
-export default QueryEditor;
+export default QueryEditor;

frontend/src/components/Sidebar.tsx

@@ -1,9 +1,9 @@
-import React, { useEffect, useState, useMemo } from 'react';
+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;
 
@@ -46,6 +46,23 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
   const [searchValue, setSearchValue] = useState('');
   const [expandedKeys, setExpandedKeys] = useState<React.Key[]>([]);
   const [autoExpandParent, setAutoExpandParent] = useState(true);
+  const [loadedKeys, setLoadedKeys] = useState<React.Key[]>([]);
+  const [contextMenu, setContextMenu] = useState<{ x: number, y: number, items: MenuProps['items'] } | null>(null);
+  
+  // Virtual Scroll State
+  const [treeHeight, setTreeHeight] = useState(500);
+  const treeContainerRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+      if (!treeContainerRef.current) return;
+      const resizeObserver = new ResizeObserver(entries => {
+          for (let entry of entries) {
+              setTreeHeight(entry.contentRect.height);
+          }
+      });
+      resizeObserver.observe(treeContainerRef.current);
+      return () => resizeObserver.disconnect();
+  }, []);
   
   // Connection Status State: key -> 'success' | 'error'
   const [connectionStates, setConnectionStates] = useState<Record<string, 'success' | 'error'>>({});
@@ -87,7 +104,7 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
     })));
   }, [connections]);
 
-  const updateTreeData = (list: TreeNode[], key: React.Key, children: TreeNode[]): TreeNode[] => {
+  const updateTreeData = (list: TreeNode[], key: React.Key, children: TreeNode[] | undefined): TreeNode[] => {
     return list.map(node => {
       if (node.key === key) {
         return { ...node, children };
@@ -99,27 +116,33 @@ 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' }));
-        const 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,
           dataRef: { ...conn, dbName: row.Database || row.database },
           isLeaf: false,
         }));
+
+        // Filter databases if configured
+        if (conn.includeDatabases && conn.includeDatabases.length > 0) {
+            dbs = dbs.filter(db => conn.includeDatabases!.includes(db.title));
+        }
+
         setTreeData(origin => updateTreeData(origin, node.key, dbs));
       } else {
         setConnectionStates(prev => ({ ...prev, [conn.id]: 'error' }));
@@ -127,9 +150,9 @@ 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);
@@ -155,13 +178,13 @@ 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,
@@ -322,13 +345,13 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
       }
   };
   
-  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);
@@ -433,27 +456,9 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
       return loop(treeData);
   }, [searchValue, treeData]);
 
-  const titleRender = (node: any) => {
-    // Determine status
-    let status: 'success' | 'error' | 'default' = 'default';
+  const getNodeMenuItems = (node: any): MenuProps['items'] => {
     if (node.type === 'connection') {
-        if (connectionStates[node.key] === 'success') status = 'success';
-        else if (connectionStates[node.key] === 'error') status = 'error';
-    } else if (node.type === 'database') {
-        if (connectionStates[node.key] === 'success') status = 'success';
-        else if (connectionStates[node.key] === 'error') status = 'error';
-    }
-    
-    // Override if active context? (Optional, user asked for "connected" status)
-    // If we want to show "Active" as Green even if not loaded?
-    // Let's stick to "Connected" state derived from successful load.
-
-    const statusBadge = node.type === 'connection' || node.type === 'database' ? (
-        <Badge status={status} style={{ marginRight: 8 }} />
-    ) : null;
-
-    if (node.type === 'connection') {
-        const items: MenuProps['items'] = [
+        return [
             {
                 key: 'new-db',
                 label: '新建数据库',
@@ -498,16 +503,22 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                  label: '断开连接',
                  icon: <DisconnectOutlined />,
                  onClick: () => {
-                     // Reset status
+                     // Reset status recursively
                      setConnectionStates(prev => {
                          const next = { ...prev };
-                         delete next[node.key];
+                         Object.keys(next).forEach(k => {
+                             if (k === node.key || k.startsWith(`${node.key}-`)) {
+                                 delete next[k];
+                             }
+                         });
                          return next;
                      });
-                     // Collapse node
-                     setExpandedKeys(prev => prev.filter(k => k !== node.key));
-                     // Clear children
-                     setTreeData(origin => updateTreeData(origin, node.key, []));
+                     // Collapse node and children
+                     setExpandedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                     // Reset loaded state recursively
+                     setLoadedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                     // Clear children (undefined to trigger reload)
+                     setTreeData(origin => updateTreeData(origin, node.key, undefined));
                      message.success("已断开连接");
                  }
              },
@@ -525,13 +536,8 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                  }
              }
         ];
-        return (
-            <Dropdown menu={{ items, triggerSubMenuAction: 'click' }} trigger={['contextMenu']}>
-                <span title={node.title}>{statusBadge}{node.title}</span>
-            </Dropdown>
-        );
     } else if (node.type === 'database') {
-       const items: MenuProps['items'] = [
+       return [
            {
                key: 'new-table',
                label: '新建表',
@@ -550,16 +556,14 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                label: '关闭数据库',
                icon: <DisconnectOutlined />,
                onClick: () => {
-                   // Reset status
                    setConnectionStates(prev => {
                        const next = { ...prev };
                        delete next[node.key];
                        return next;
                    });
-                   // Collapse node
-                   setExpandedKeys(prev => prev.filter(k => k !== node.key));
-                   // Clear children
-                   setTreeData(origin => updateTreeData(origin, node.key, []));
+                   setExpandedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                   setLoadedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                   setTreeData(origin => updateTreeData(origin, node.key, undefined));
                }
            },
            { 
@@ -583,13 +587,23 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                  onClick: () => handleRunSQLFile(node)
              }
        ];
-       return (
-         <Dropdown menu={{ items, triggerSubMenuAction: 'click' }} trigger={['contextMenu']}>
-           <span title={node.title}>{statusBadge}{node.title}</span>
-         </Dropdown>
-       );
     } else if (node.type === 'table') {
-        const contextMenu: MenuProps['items'] = [
+        return [
+            {
+                key: 'new-query',
+                label: '新建查询',
+                icon: <ConsoleSqlOutlined />,
+                onClick: () => {
+                   addTab({
+                       id: `query-${Date.now()}`,
+                       title: `新建查询`,
+                       type: 'query',
+                       connectionId: node.dataRef.id,
+                       dbName: node.dataRef.dbName
+                   });
+                }
+            },
+            { type: 'divider' },
             {
                 key: 'design-table',
                 label: '设计表',
@@ -623,14 +637,33 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                 ]
             }
         ];
-
-        return (
-            <Dropdown menu={{ items: contextMenu, triggerSubMenuAction: 'click' }} trigger={['contextMenu']}>
-                <span title={node.title}>{node.title}</span>
-            </Dropdown>
-        );
     }
-    return <span title={node.title}>{node.title}</span>;
+    return [];
+  };
+
+  const titleRender = (node: any) => {
+    let status: 'success' | 'error' | 'default' = 'default';
+    if (node.type === 'connection' || node.type === 'database') {
+        if (connectionStates[node.key] === 'success') status = 'success';
+        else if (connectionStates[node.key] === 'error') status = 'error';
+    }
+    
+    const statusBadge = node.type === 'connection' || node.type === 'database' ? (
+        <Badge status={status} style={{ marginRight: 8 }} />
+    ) : null;
+
+    return <span title={node.title}>{statusBadge}{node.title}</span>;
+  };
+
+  const onRightClick = ({ event, node }: any) => {
+      const items = getNodeMenuItems(node);
+      if (items && items.length > 0) {
+          setContextMenu({
+              x: event.clientX,
+              y: event.clientY,
+              items
+          });
+      }
   };
 
   return (
@@ -638,7 +671,7 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
         <div style={{ padding: '4px 8px' }}>
             <Search placeholder="搜索..." onChange={onSearch} size="small" />
         </div>
-        <div style={{ flex: 1, overflowY: 'auto', overflowX: 'hidden', minHeight: 0 }}>
+        <div ref={treeContainerRef} style={{ flex: 1, overflow: 'hidden', minHeight: 0 }}>
             <Tree
                 showIcon
                 loadData={onLoadData}
@@ -648,11 +681,26 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                 titleRender={titleRender}
                 expandedKeys={expandedKeys}
                 onExpand={onExpand}
+                loadedKeys={loadedKeys}
+                onLoad={setLoadedKeys}
                 autoExpandParent={autoExpandParent}
                 blockNode
+                height={treeHeight}
+                onRightClick={onRightClick}
             />
         </div>
 
+        {contextMenu && (
+            <Dropdown
+                menu={{ items: contextMenu.items }}
+                open={true}
+                onOpenChange={(open) => { if (!open) setContextMenu(null); }}
+                trigger={['contextMenu']}
+            >
+                <div style={{ position: 'fixed', left: contextMenu.x, top: contextMenu.y, width: 1, height: 1 }} />
+            </Dropdown>
+        )}
+
         <Modal
             title="新建数据库"
             open={isCreateDbModalOpen}

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?
@@ -730,4 +730,4 @@ const TableDesigner: React.FC<{ tab: TabData }> = ({ tab }) => {
   );
 };
 
-export default TableDesigner;
+export default TableDesigner;

frontend/src/types.ts

@@ -21,6 +21,7 @@ export interface SavedConnection {
   id: string;
   name: string;
   config: ConnectionConfig;
+  includeDatabases?: string[];
 }
 
 export interface ColumnDefinition {

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 +27,18 @@ 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 ExportTable(arg1:connection.ConnectionConfig,arg2:string,arg3:string,arg4:string):Promise<connection.QueryResult>;
 
+export function ImportConfigFile():Promise<connection.QueryResult>;
+
 export function ImportData(arg1:connection.ConnectionConfig,arg2:string,arg3:string):Promise<connection.QueryResult>;
 
 export function MySQLConnect(arg1:connection.ConnectionConfig):Promise<connection.QueryResult>;
@@ -43,3 +52,5 @@ export function MySQLQuery(arg1:connection.ConnectionConfig,arg2:string,arg3:str
 export function MySQLShowCreateTable(arg1:connection.ConnectionConfig,arg2:string,arg3:string):Promise<connection.QueryResult>;
 
 export function OpenSQLFile():Promise<connection.QueryResult>;
+
+export function TestConnection(arg1:connection.ConnectionConfig):Promise<connection.QueryResult>;

frontend/wailsjs/go/app/App.js

@@ -50,6 +50,18 @@ 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);
 }
@@ -58,6 +70,10 @@ export function ExportTable(arg1, arg2, arg3, arg4) {
   return window['go']['app']['App']['ExportTable'](arg1, arg2, arg3, arg4);
 }
 
+export function ImportConfigFile() {
+  return window['go']['app']['App']['ImportConfigFile']();
+}
+
 export function ImportData(arg1, arg2, arg3) {
   return window['go']['app']['App']['ImportData'](arg1, arg2, arg3);
 }
@@ -85,3 +101,7 @@ export function MySQLShowCreateTable(arg1, arg2, arg3) {
 export function OpenSQLFile() {
   return window['go']['app']['App']['OpenSQLFile']();
 }
+
+export function TestConnection(arg1) {
+  return window['go']['app']['App']['TestConnection'](arg1);
+}

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
@@ -27,46 +34,149 @@ 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 {
-	return fmt.Sprintf("%s|%s|%s:%d|%s|%s|%v", config.Type, config.User, config.Host, config.Port, config.Database, config.SSH.Host, config.UseSSH)
+	if !config.UseSSH {
+		config.SSH = connection.SSHConfig{}
+	}
+	// 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]
+	}
+	if config.UseSSH && config.Type != "mysql" {
+		logger.Warnf("当前仅 MySQL 支持内置 SSH 直连，其他类型请使用本地端口转发：%s", formatConnSummary(config))
+	}
+	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

@@ -5,30 +5,32 @@ import (
 	"strings"
 
 	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
 )
 
 // 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()}
 	}
 	
-	return connection.QueryResult{Success: true, Message: "Connected successfully"}
+	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 {
+	_, 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"}
 }
 
 func (a *App) CreateDatabase(config connection.ConnectionConfig, dbName string) connection.QueryResult {
@@ -40,9 +42,11 @@ 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)
@@ -79,13 +83,11 @@ 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()}
 	}
 
@@ -93,26 +95,39 @@ func (a *App) DBQuery(config connection.ConnectionConfig, dbName string, query s
 	if strings.HasPrefix(lowerQuery, "select") || strings.HasPrefix(lowerQuery, "show") || strings.HasPrefix(lowerQuery, "describe") || strings.HasPrefix(lowerQuery, "explain") {
 		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)
 		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()}
 	}
 	
@@ -125,18 +140,17 @@ 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()}
 	}
 
@@ -149,18 +163,18 @@ 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()}
 	}
 
@@ -168,17 +182,15 @@ 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()}
 	}
@@ -187,17 +199,15 @@ 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()}
 	}
@@ -206,17 +216,15 @@ 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()}
 	}
@@ -225,17 +233,15 @@ 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()}
 	}
@@ -244,10 +250,7 @@ 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 {
@@ -260,4 +263,4 @@ func (a *App) DBGetAllColumns(config connection.ConnectionConfig, dbName string)
 	}
 
 	return connection.QueryResult{Success: true, Data: cols}
-}
+}

internal/app/methods_file.go

@@ -9,6 +9,7 @@ import (
 
 	"GoNavi-Wails/internal/connection"
 	"GoNavi-Wails/internal/db"
+	"GoNavi-Wails/internal/logger"
 
 	"github.com/wailsapp/wails/v2/pkg/runtime"
 )
@@ -44,6 +45,33 @@ func (a *App) OpenSQLFile() connection.QueryResult {
 	return connection.QueryResult{Success: true, Data: string(content)}
 }
 
+func (a *App) ImportConfigFile() connection.QueryResult {
+	selection, err := runtime.OpenFileDialog(a.ctx, runtime.OpenDialogOptions{
+		Title: "Select Config File",
+		Filters: []runtime.FileFilter{
+			{
+				DisplayName: "JSON Files (*.json)",
+				Pattern:     "*.json",
+			},
+		},
+	})
+
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	if selection == "" {
+		return connection.QueryResult{Success: false, Message: "Cancelled"}
+	}
+
+	content, err := os.ReadFile(selection)
+	if err != nil {
+		return connection.QueryResult{Success: false, Message: err.Error()}
+	}
+
+	return connection.QueryResult{Success: true, Data: string(content)}
+}
+
 func (a *App) ImportData(config connection.ConnectionConfig, dbName, tableName string) connection.QueryResult {
 	selection, err := runtime.OpenFileDialog(a.ctx, runtime.OpenDialogOptions{
 		Title: fmt.Sprintf("Import into %s", tableName),
@@ -107,10 +135,7 @@ 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()}
@@ -136,25 +161,20 @@ 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++
 		}
@@ -164,10 +184,7 @@ 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 {
@@ -195,20 +212,14 @@ 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)
-	}
+	query := fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(runConfig.Type, tableName))
 	
 data, columns, err := dbInst.Query(query)
 	if err != nil {
@@ -290,6 +301,45 @@ data, columns, err := dbInst.Query(query)
 	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, ".")
+}
+
 // 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 == "" {
@@ -377,4 +427,4 @@ func (a *App) ExportData(data []map[string]interface{}, columns []string, defaul
 	}
 
 	return connection.QueryResult{Success: true, Message: "Export successful"}
-}
+}

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/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 (
+	"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) 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()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, nil, 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 {
+			entry[col] = normalizeQueryValue(values[i])
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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 +1,363 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"net"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/ssh"
+	"GoNavi-Wails/internal/utils"
+
+	_ "gitee.com/chunanyong/dm"
+)
+
+type DamengDB struct {
+	conn        *sql.DB
+	pingTimeout time.Duration
+}
+
+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))
+	if config.UseSSH {
+		// SSH logic similar to others, assumes port forwarding
+		_, err := ssh.RegisterSSHNetwork(config.SSH)
+		if err == nil {
+			// DM driver likely uses standard net.Dial, so we might need a local listener
+			// or assume port forwarding is handled externally or implicitly via "tcp" override if driver allows.
+			// Similar to Oracle, we skip complex custom dialer injection for now.
+		}
+	}
+
+	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 {
+	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 {
+	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) 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()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, nil, 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 {
+			entry[col] = normalizeQueryValue(values[i])
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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 +1,407 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/ssh"
+	"GoNavi-Wails/internal/utils"
+
+	_ "gitea.com/kingbase/gokb" // Registers "kingbase" driver
+)
+
+type KingbaseDB struct {
+	conn        *sql.DB
+	pingTimeout time.Duration
+}
+
+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
+
+	if config.UseSSH {
+		netName, err := ssh.RegisterSSHNetwork(config.SSH)
+		if err == nil {
+			// Kingbase/Postgres lib/pq allows custom dialer via "host" if using unix socket,
+			// but for custom network it's harder.
+			// Ideally we use a local forwarder.
+			// For now, we assume standard TCP or handle SSH externally.
+			// If we implement the net.Dial override for "kingbase" driver (which might use lib/pq internally),
+			// we might need to check if it supports "cloudsql" style or similar custom dialers.
+			// Similar to others, skipping SSH deep integration here for now.
+			_ = netName
+		}
+	}
+
+	// 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 {
+	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 {
+	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) 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()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, nil, 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 {
+			entry[col] = normalizeQueryValue(values[i])
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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) {
+	schema := "public"
+	if dbName != "" {
+		schema = dbName
+	}
+
+	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`, schema, tableName)
+
+	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) {
+	// Postgres/Kingbase index query
+	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'
+	`, tableName, "public") // Default to public if dbName (schema) not clear.
+
+	if dbName != "" {
+		// Update query to use dbName as schema
+		query = strings.Replace(query, "'public'", fmt.Sprintf("'%s'", dbName), 1)
+	}
+
+	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) {
+	schema := "public"
+	if dbName != "" {
+		schema = dbName
+	}
+
+	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'`,
+		tableName, schema)
+
+	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) {
+	query := fmt.Sprintf(`SELECT trigger_name, action_timing, event_manipulation 
+		FROM information_schema.triggers 
+		WHERE event_object_table = '%s'`, tableName)
+
+	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) {
+	schema := "public"
+	if dbName != "" {
+		schema = dbName
+	}
+
+	query := fmt.Sprintf(`SELECT table_name, column_name, data_type 
+		FROM information_schema.columns 
+		WHERE table_schema = '%s'`, schema)
+
+	data, _, err := k.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/mysql_impl.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
 	"GoNavi-Wails/internal/ssh"
 	"GoNavi-Wails/internal/utils"
 
@@ -14,7 +15,8 @@ import (
 )
 
 type MySQLDB struct {
-	conn *sql.DB
+	conn        *sql.DB
+	pingTimeout time.Duration
 }
 
 func (m *MySQLDB) getDSN(config connection.ConnectionConfig) string {
@@ -27,20 +29,30 @@ 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
+	if err := m.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
 	return nil
 }
 
@@ -55,7 +67,11 @@ 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)
 }
@@ -91,15 +107,7 @@ func (m *MySQLDB) Query(query string) ([]map[string]interface{}, []string, error
 
 		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
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}
@@ -139,12 +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 {
@@ -165,7 +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
@@ -195,12 +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
@@ -228,14 +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"]),
@@ -325,12 +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
 		}
@@ -340,7 +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")
 		}
@@ -356,13 +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 +1,366 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"net"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/ssh"
+	"GoNavi-Wails/internal/utils"
+
+	_ "github.com/sijms/go-ora/v2"
+)
+
+type OracleDB struct {
+	conn        *sql.DB
+	pingTimeout time.Duration
+}
+
+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?
+	}
+
+	if config.UseSSH {
+		_, err := ssh.RegisterSSHNetwork(config.SSH)
+		if err == nil {
+			// Oracle driver might not support custom dialer via DSN easily without extra config
+			// But go-ora v2 supports some advanced options.
+			// For simplicity, we assume standard TCP or we might need a workaround for SSH.
+			// go-ora v2 is pure Go, so we can potentially use a custom dialer if we manually open.
+			// But for now, let's just use the address.
+			// SSH tunneling via net.Dialer override is complex in sql.Open("oracle", ...).
+			// We might need to forward a local port if using SSH.
+			// Since ssh.RegisterSSHNetwork creates a custom network "ssh-via-...",
+			// we need to see if go-ora supports custom networks.
+			// Checking go-ora docs (simulated): It supports "unix" and "tcp".
+			// We might need to map the custom network to a local proxy.
+			// For now, we will assume direct connection or handle SSH separately later.
+			// We'll leave the protocol implementation as is in MySQL for now, hoping go-ora uses standard net.Dial.
+			// Note: go-ora connection string: oracle://user:pass@host:port/service
+			// It parses host/port. It doesn't easily take a custom "network" parameter in URL.
+			// We will proceed with standard TCP string.
+		}
+	}
+
+	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 {
+	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 {
+	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) 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()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, nil, 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 {
+			entry[col] = normalizeQueryValue(values[i])
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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

@@ -3,6 +3,9 @@ package db
 import (
 	"database/sql"
 	"fmt"
+	"net"
+	"net/url"
+	"strconv"
 	"time"
 
 	"GoNavi-Wails/internal/connection"
@@ -12,34 +15,44 @@ import (
 )
 
 type PostgresDB struct {
-	conn *sql.DB
+	conn        *sql.DB
+	pingTimeout time.Duration
 }
 
 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)
 	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
+	if err := p.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
 	return nil
 }
 
@@ -54,7 +67,11 @@ 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)
 }
@@ -64,8 +81,7 @@ func (p *PostgresDB) Query(query string) ([]map[string]interface{}, []string, er
 		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
 	}
@@ -91,15 +107,7 @@ rows, err := p.conn.Query(query)
 
 		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
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}
@@ -133,16 +141,22 @@ 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

internal/db/query_value.go

@@ -0,0 +1,58 @@
+package db
+
+import (
+	"encoding/hex"
+	"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{} {
+	if b, ok := v.([]byte); ok {
+		return bytesToReadableString(b)
+	}
+	return v
+}
+
+func bytesToReadableString(b []byte) interface{} {
+	if b == nil {
+		return nil
+	}
+	if len(b) == 0 {
+		return ""
+	}
+
+	if utf8.Valid(b) {
+		s := string(b)
+		if isMostlyPrintable(s) {
+			return s
+		}
+	}
+
+	return "0x" + hex.EncodeToString(b)
+}
+
+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/sqlite_impl.go

@@ -12,16 +12,23 @@ 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
+	if err := s.Ping(); err != nil {
+		return fmt.Errorf("连接建立后验证失败：%w", err)
+	}
 	return nil
 }
 
@@ -36,7 +43,11 @@ 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)
 }
@@ -72,15 +83,7 @@ func (s *SQLiteDB) Query(query string) ([]map[string]interface{}, []string, erro
 
 		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
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}
@@ -109,7 +112,7 @@ 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 {

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

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/logger"
 
 	"github.com/go-sql-driver/mysql"
 	"golang.org/x/crypto/ssh"
@@ -19,18 +20,49 @@ 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 +71,9 @@ 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 +83,13 @@ 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
@@ -61,9 +102,10 @@ 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

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")
 	}
 }