Merge branch 'release/0.2.0'

- 修复了多个 Job 同时 Finalize Release 导致的竞争条件失败问题
- 改用串行发布策略：先并行构建所有平台产物，最后统一汇总发布
- 将 macOS/Windows 打包脚本中的关键日志信息修改为中文
- 确保发布的 Release 默认为 Draft 状态，等待人工确认

.github/workflows/release.yml

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

.gitignore

@@ -14,4 +14,5 @@ node_modules/
 dist/
 .DS_Store
 .gemini-clipboard
-GoNavi-Wails
+GoNavi-Wails
+GoNavi-Wails.exe

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/src/App.tsx

@@ -1,9 +1,11 @@
 import React, { useState, useEffect } from 'react';
 import { Layout, Button, ConfigProvider, theme, Dropdown, MenuProps, message } from 'antd';
+import zhCN from 'antd/locale/zh_CN';
 import { PlusOutlined, BulbOutlined, BulbFilled, ConsoleSqlOutlined, BugOutlined, SettingOutlined, UploadOutlined, DownloadOutlined } from '@ant-design/icons';
 import Sidebar from './components/Sidebar';
 import TabManager from './components/TabManager';
 import ConnectionModal from './components/ConnectionModal';
+import DataSyncModal from './components/DataSyncModal';
 import LogPanel from './components/LogPanel';
 import { useStore } from './store';
 import { SavedConnection } from './types';
@@ -13,6 +15,7 @@ const { Sider, Content } = Layout;
 
 function App() {
   const [isModalOpen, setIsModalOpen] = useState(false);
+  const [isSyncModalOpen, setIsSyncModalOpen] = useState(false);
   const [editingConnection, setEditingConnection] = useState<SavedConnection | null>(null);
   const { darkMode, toggleDarkMode, addTab, activeContext, connections, addConnection, tabs, activeTabId } = useStore();
 
@@ -77,6 +80,12 @@ function App() {
   };
 
   const settingsMenu: MenuProps['items'] = [
+      {
+          key: 'sync',
+          label: '数据同步',
+          icon: <UploadOutlined rotate={90} />,
+          onClick: () => setIsSyncModalOpen(true)
+      },
       {
           key: 'import',
           label: '导入连接配置',
@@ -216,6 +225,7 @@ function App() {
 
   return (
     <ConfigProvider
+        locale={zhCN}
         theme={{
             algorithm: darkMode ? theme.darkAlgorithm : theme.defaultAlgorithm,
         }}
@@ -292,6 +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

@@ -1,14 +1,19 @@
 import React, { useState, useEffect } from 'react';
-import { Modal, Form, Input, InputNumber, Button, message, Checkbox, Divider, Collapse, Select, Alert } from 'antd';
+import { Modal, Form, Input, InputNumber, Button, message, Checkbox, Divider, Select, Alert, Card, Row, Col, Typography } from 'antd';
+import { DatabaseOutlined, ConsoleSqlOutlined, FileTextOutlined, CloudServerOutlined, AppstoreAddOutlined } from '@ant-design/icons';
 import { useStore } from '../store';
 import { MySQLConnect, MySQLGetDatabases } from '../../wailsjs/go/app/App';
 import { SavedConnection } from '../types';
 
+const { Meta } = Card;
+const { Text } = Typography;
+
 const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialValues?: SavedConnection | null }> = ({ open, onClose, initialValues }) => {
   const [form] = Form.useForm();
   const [loading, setLoading] = useState(false);
   const [useSSH, setUseSSH] = useState(false);
   const [dbType, setDbType] = useState('mysql');
+  const [step, setStep] = useState(1); // 1: Select Type, 2: Configure
   const [testResult, setTestResult] = useState<{ type: 'success' | 'error', message: string } | null>(null);
   const [dbList, setDbList] = useState<string[]>([]);
   const addConnection = useStore((state) => state.addConnection);
@@ -19,6 +24,8 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
           setTestResult(null); // Reset test result
           setDbList([]);
           if (initialValues) {
+              // Edit mode: Go directly to step 2
+              setStep(2);
               form.setFieldsValue({
                   type: initialValues.config.type,
                   name: initialValues.name,
@@ -34,10 +41,14 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
                   sshUser: initialValues.config.ssh?.user,
                   sshPassword: initialValues.config.ssh?.password,
                   sshKeyPath: initialValues.config.ssh?.keyPath,
+                  driver: (initialValues.config as any).driver,
+                  dsn: (initialValues.config as any).dsn
               });
               setUseSSH(initialValues.config.useSSH || false);
               setDbType(initialValues.config.type);
           } else {
+              // Create mode: Start at step 1
+              setStep(1);
               form.resetFields();
               setUseSSH(false);
               setDbType('mysql');
@@ -52,7 +63,6 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
       
       const config = await buildConfig(values);
       
-      // Use Connect to verify before saving
       const res = await MySQLConnect(config as any);
       setLoading(false);
       
@@ -75,6 +85,7 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
         form.resetFields();
         setUseSSH(false);
         setDbType('mysql');
+        setStep(1);
         onClose();
       } else {
         message.error('连接失败: ' + res.message);
@@ -88,13 +99,12 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
       try {
           const values = await form.validateFields();
           setLoading(true);
-          setTestResult(null); // Clear previous result
+          setTestResult(null);
           const config = await buildConfig(values);
           const res = await (window as any).go.app.App.TestConnection(config);
           setLoading(false);
           if (res.success) {
               setTestResult({ type: 'success', message: res.message });
-              // Fetch DB List on success
               const dbRes = await MySQLGetDatabases(config as any);
               if (dbRes.success) {
                   const dbs = (dbRes.data as any[]).map((row: any) => row.Database || row.database);
@@ -119,35 +129,70 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
 
       return { 
           type: values.type,
-          host: values.host,
+          host: values.host || "",
           port: Number(values.port || 0),
           user: values.user || "",
           password: values.password || "",
           database: values.database || "",
           useSSH: !!values.useSSH,
-          ssh: sshConfig
+          ssh: sshConfig,
+          driver: values.driver,
+          dsn: values.dsn
       };
   };
 
-  const isSqlite = dbType === 'sqlite';
+  const handleTypeSelect = (type: string) => {
+      setDbType(type);
+      form.setFieldsValue({ type: type });
+      
+      // Auto-fill default port
+      let defaultPort = 3306;
+      switch (type) {
+          case 'mysql': defaultPort = 3306; break;
+          case 'postgres': defaultPort = 5432; break;
+          case 'oracle': defaultPort = 1521; break;
+          case 'dameng': defaultPort = 5236; break;
+          case 'kingbase': defaultPort = 54321; break;
+          default: defaultPort = 3306;
+      }
+      if (type !== 'sqlite' && type !== 'custom') {
+          form.setFieldsValue({ port: defaultPort });
+      }
 
-  return (
-    <Modal 
-        title={initialValues ? "编辑连接" : "新建连接"}
-        open={open} 
-        onCancel={onClose} 
-        onOk={handleOk} 
-        confirmLoading={loading} 
-        footer={[
-            <Button key="test" loading={loading} onClick={handleTest}>测试连接</Button>,
-            <Button key="cancel" onClick={onClose}>取消</Button>,
-            <Button key="submit" type="primary" loading={loading} onClick={handleOk}>保存</Button>
-        ]}
-        width={600}
-        zIndex={10001} // Increase z-index
-        destroyOnHidden // Reset on close
-        maskClosable={false} // Prevent accidental close by clicking mask, user must click X or Cancel
-    >
+      setStep(2);
+  };
+
+  const isSqlite = dbType === 'sqlite';
+  const isCustom = dbType === 'custom';
+
+  const dbTypes = [
+      { key: 'mysql', name: 'MySQL', icon: <ConsoleSqlOutlined style={{ fontSize: 24, color: '#00758F' }} /> },
+      { key: 'postgres', name: 'PostgreSQL', icon: <DatabaseOutlined style={{ fontSize: 24, color: '#336791' }} /> },
+      { key: 'sqlite', name: 'SQLite', icon: <FileTextOutlined style={{ fontSize: 24, color: '#003B57' }} /> },
+      { key: 'oracle', name: 'Oracle', icon: <DatabaseOutlined style={{ fontSize: 24, color: '#F80000' }} /> },
+      { key: 'dameng', name: 'Dameng (达梦)', icon: <CloudServerOutlined style={{ fontSize: 24, color: '#1890ff' }} /> },
+      { key: 'kingbase', name: 'Kingbase (人大金仓)', icon: <DatabaseOutlined style={{ fontSize: 24, color: '#faad14' }} /> },
+      { key: 'custom', name: 'Custom (自定义)', icon: <AppstoreAddOutlined style={{ fontSize: 24, color: '#595959' }} /> },
+  ];
+
+  const renderStep1 = () => (
+      <Row gutter={[16, 16]}>
+          {dbTypes.map(item => (
+              <Col span={8} key={item.key}>
+                  <Card 
+                      hoverable 
+                      onClick={() => handleTypeSelect(item.key)}
+                      style={{ textAlign: 'center', cursor: 'pointer' }}
+                  >
+                      <div style={{ marginBottom: 12 }}>{item.icon}</div>
+                      <Text strong>{item.name}</Text>
+                  </Card>
+              </Col>
+          ))}
+      </Row>
+  );
+
+  const renderStep2 = () => (
       <Form 
         form={form} 
         layout="vertical" 
@@ -155,22 +200,28 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
         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"} />
@@ -233,16 +284,52 @@ const ConnectionModal: React.FC<{ open: boolean; onClose: () => void; initialVal
             )}
         </>
         )}
-      </Form>
-      
-      {testResult && (
+        </>
+        )}
+        
+        {testResult && (
           <Alert
               message={testResult.message}
               type={testResult.type}
               showIcon
               style={{ marginTop: 16 }}
           />
-      )}
+        )}
+      </Form>
+  );
+
+  const getFooter = () => {
+      if (step === 1) {
+          return [
+             <Button key="cancel" onClick={onClose}>取消</Button>
+          ];
+      }
+      return [
+          !initialValues && <Button key="back" onClick={() => setStep(1)} style={{ float: 'left' }}>上一步</Button>,
+          <Button key="test" loading={loading} onClick={handleTest}>测试连接</Button>,
+          <Button key="cancel" onClick={onClose}>取消</Button>,
+          <Button key="submit" type="primary" loading={loading} onClick={handleOk}>保存</Button>
+      ];
+  };
+
+  const getTitle = () => {
+      if (step === 1) return "选择数据源类型";
+      const typeName = dbTypes.find(t => t.key === dbType)?.name || dbType;
+      return initialValues ? "编辑连接" : `新建 ${typeName} 连接`;
+  };
+
+  return (
+    <Modal 
+        title={getTitle()}
+        open={open} 
+        onCancel={onClose} 
+        footer={getFooter()}
+        width={step === 1 ? 700 : 600}
+        zIndex={10001} 
+        destroyOnHidden 
+        maskClosable={false}
+    >
+      {step === 1 ? renderStep1() : renderStep2()}
     </Modal>
   );
 };

frontend/src/components/DataGrid.tsx

@@ -5,6 +5,7 @@ import { ReloadOutlined, ImportOutlined, ExportOutlined, DownOutlined, PlusOutli
 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';
 
 // --- Helper: Format Value ---
@@ -214,6 +215,7 @@ 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) => {
@@ -234,16 +236,26 @@ 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[]>([]);
@@ -685,7 +697,7 @@ const DataGrid: React.FC<DataGridProps> = ({
   const totalWidth = columns.reduce((sum, col) => sum + (col.width as number || 200), 0);
 
   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 +759,7 @@ 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 }}>
@@ -794,9 +806,9 @@ 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;
            }

frontend/src/components/DataSyncModal.tsx

@@ -0,0 +1,226 @@
+import React, { useState, useEffect } from 'react';
+import { Modal, Form, Select, Button, message, Steps, Transfer, Card, Alert, Divider, Typography } from 'antd';
+import { useStore } from '../store';
+import { DBGetDatabases, DBGetTables, DataSync } from '../../wailsjs/go/app/App';
+import { SavedConnection } from '../types';
+import { connection } from '../../wailsjs/go/models';
+
+const { Title, Text } = Typography;
+const { Step } = Steps;
+const { Option } = Select;
+
+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[]>([]);
+
+  // Step 3: Result
+  const [syncResult, setSyncResult] = useState<any>(null);
+
+  useEffect(() => {
+    if (open) {
+        setCurrentStep(0);
+        setSourceConnId('');
+        setTargetConnId('');
+        setSourceDb('');
+        setTargetDb('');
+        setSelectedTables([]);
+        setSyncResult(null);
+    }
+  }, [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(conn.config 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(conn.config 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 = { ...conn.config, database: 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 runSync = async () => {
+      setLoading(true);
+      const sConn = connections.find(c => c.id === sourceConnId)!;
+      const tConn = connections.find(c => c.id === targetConnId)!;
+      
+      const config = {
+          sourceConfig: { ...sConn.config, database: sourceDb },
+          targetConfig: { ...tConn.config, database: targetDb },
+          tables: selectedTables,
+          mode: "insert_update"
+      };
+
+      try {
+          const res = await DataSync(config as any);
+          setSyncResult(res);
+          setCurrentStep(2);
+      } catch (e) {
+          message.error("Sync execution failed");
+      }
+      setLoading(false);
+  };
+
+  return (
+    <Modal
+      title="数据同步"
+      open={open}
+      onCancel={onClose}
+      width={800}
+      footer={null}
+      destroyOnHidden
+    >
+      <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 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>
+      )}
+
+      {/* STEP 2: TABLES */}
+      {currentStep === 1 && (
+          <div style={{ height: 400 }}>
+              <Text type="secondary">请选择需要同步的表:</Text>
+              <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: 350, marginTop: 12 }}
+                locale={{ itemUnit: '项', itemsUnit: '项', searchPlaceholder: '搜索表', notFoundContent: '暂无数据' }}
+              />
+          </div>
+      )}
+
+      {/* STEP 3: RESULT */}
+      {currentStep === 2 && syncResult && (
+          <div>
+              <Alert 
+                message={syncResult.success ? "同步完成" : "同步失败"}
+                description={syncResult.message || `成功同步 ${syncResult.tablesSynced} 张表. 插入: ${syncResult.rowsInserted}, 更新: ${syncResult.rowsUpdated}`}
+                type={syncResult.success ? "success" : "error"}
+                showIcon
+              />
+              <Divider orientation="left">日志</Divider>
+              <div style={{ background: '#f5f5f5', padding: 12, height: 300, overflowY: 'auto', fontFamily: 'monospace' }}>
+                  {syncResult.logs.map((log: string, i: number) => <div key={i}>{log}</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 type="primary" onClick={runSync} loading={loading} disabled={selectedTables.length === 0}>开始同步</Button>
+              </>
+          )}
+          {currentStep === 2 && (
+              <>
+                  <Button onClick={() => setCurrentStep(1)} style={{ marginRight: 8 }}>继续同步</Button>
+                  <Button type="primary" onClick={onClose}>关闭</Button>
+              </>
+          )}
+      </div>
+    </Modal>
+  );
+};
+
+export default DataSyncModal;

frontend/src/components/DataViewer.tsx

@@ -162,6 +162,7 @@ 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}
@@ -178,6 +179,7 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
           onToggleFilter={handleToggleFilter}
           onApplyFilter={handleApplyFilter}
       />
+    </div>
   );
 };
 

frontend/src/components/Sidebar.tsx

@@ -503,13 +503,21 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                  label: '断开连接',
                  icon: <DisconnectOutlined />,
                  onClick: () => {
+                     // Reset status recursively
                      setConnectionStates(prev => {
                          const next = { ...prev };
-                         delete next[node.key];
+                         Object.keys(next).forEach(k => {
+                             if (k === node.key || k.startsWith(`${node.key}-`)) {
+                                 delete next[k];
+                             }
+                         });
                          return next;
                      });
-                     setExpandedKeys(prev => prev.filter(k => k !== node.key));
-                     setLoadedKeys(prev => prev.filter(k => k !== node.key));
+                     // Collapse node and children
+                     setExpandedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                     // Reset loaded state recursively
+                     setLoadedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                     // Clear children (undefined to trigger reload)
                      setTreeData(origin => updateTreeData(origin, node.key, undefined));
                      message.success("已断开连接");
                  }
@@ -553,8 +561,8 @@ const Sidebar: React.FC<{ onEditConnection?: (conn: SavedConnection) => void }>
                        delete next[node.key];
                        return next;
                    });
-                   setExpandedKeys(prev => prev.filter(k => k !== node.key));
-                   setLoadedKeys(prev => prev.filter(k => k !== node.key));
+                   setExpandedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
+                   setLoadedKeys(prev => prev.filter(k => k !== node.key && !k.toString().startsWith(`${node.key}-`)));
                    setTreeData(origin => updateTreeData(origin, node.key, undefined));
                }
            },

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>;
 
@@ -26,6 +27,8 @@ 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 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>;

frontend/wailsjs/go/app/App.js

@@ -50,6 +50,10 @@ 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 ExportData(arg1, arg2, arg3, arg4) {
   return window['go']['app']['App']['ExportData'](arg1, arg2, arg3, arg4);
 }

frontend/wailsjs/go/models.ts

@@ -77,6 +77,8 @@ export namespace connection {
 	    database: string;
 	    useSSH: boolean;
 	    ssh: SSHConfig;
+	    driver?: string;
+	    dsn?: string;
 	
 	    static createFrom(source: any = {}) {
 	        return new ConnectionConfig(source);
@@ -92,6 +94,8 @@ 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"];
 	    }
 	
 		convertValues(a: any, classs: any, asMap: boolean = false): any {
@@ -134,3 +138,68 @@ export namespace connection {
 
 }
 
+export namespace sync {
+	
+	export class SyncConfig {
+	    sourceConfig: connection.ConnectionConfig;
+	    targetConfig: connection.ConnectionConfig;
+	    tables: string[];
+	    mode: string;
+	
+	    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.mode = source["mode"];
+	    }
+	
+		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/methods_db.go

@@ -10,19 +10,7 @@ import (
 // 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 {
 		return connection.QueryResult{Success: false, Message: err.Error()}
@@ -32,17 +20,6 @@ func (a *App) DBConnect(config connection.ConnectionConfig) connection.QueryResu
 }
 
 func (a *App) TestConnection(config connection.ConnectionConfig) connection.QueryResult {
-	// Force close existing cached connection if any to ensure fresh test
-	key := getCacheKey(config)
-	func() {
-		a.mu.Lock()
-		defer a.mu.Unlock()
-		if oldDB, ok := a.dbCache[key]; ok {
-			oldDB.Close()
-			delete(a.dbCache, key)
-		}
-	}()
-
 	_, err := a.getDatabase(config)
 	if err != nil {
 		return connection.QueryResult{Success: false, Message: err.Error()}

internal/app/methods_sync.go

@@ -0,0 +1,11 @@
+package app
+
+import (
+	"GoNavi-Wails/internal/sync"
+)
+
+// DataSync executes a data synchronization task
+func (a *App) DataSync(config sync.SyncConfig) sync.SyncResult {
+	engine := sync.NewSyncEngine()
+	return engine.RunSync(config)
+}

internal/connection/types.go

@@ -19,14 +19,16 @@ 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
 }
 
 // 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 +38,7 @@ 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 +1,234 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/utils"
+)
+
+type CustomDB struct {
+	conn   *sql.DB
+	driver string
+}
+
+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 err
+	}
+	c.conn = db
+	c.driver = config.Driver
+	return c.Ping()
+}
+
+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")
+	}
+	ctx, cancel := utils.ContextWithTimeout(5 * time.Second)
+	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 {
+			var v interface{}
+			val := values[i]
+			b, ok := val.([]byte)
+			if ok {
+				v = string(b)
+			} else {
+				v = val
+			}
+			entry[col] = v
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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" {
+		if dbName != "" && dbName != "public" {
+			query = fmt.Sprintf("SELECT table_name FROM information_schema.tables WHERE table_schema = '%s'", dbName)
+		}
+	} 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"
+	}
+
+	// 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 {
+		// 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 +1,340 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+	"time"
+
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/ssh"
+	"GoNavi-Wails/internal/utils"
+
+	_ "gitee.com/chunanyong/dm"
+)
+
+type DamengDB struct {
+	conn *sql.DB
+}
+
+func (d *DamengDB) getDSN(config connection.ConnectionConfig) string {
+	// dm://user:password@host:port?schema=...
+	// or dm://user:password@host:port
+
+	address := fmt.Sprintf("%s:%d", config.Host, 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.
+		}
+	}
+
+	dsn := fmt.Sprintf("dm://%s:%s@%s", config.User, config.Password, address)
+	if config.Database != "" {
+		dsn += fmt.Sprintf("?schema=%s", config.Database)
+	}
+	return dsn
+}
+
+func (d *DamengDB) Connect(config connection.ConnectionConfig) error {
+	dsn := d.getDSN(config)
+	db, err := sql.Open("dm", dsn)
+	if err != nil {
+		return err
+	}
+	d.conn = db
+	return d.Ping()
+}
+
+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")
+	}
+	ctx, cancel := utils.ContextWithTimeout(5 * time.Second)
+	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 {
+			var v interface{}
+			val := values[i]
+			b, ok := val.([]byte)
+			if ok {
+				v = string(b)
+			} else {
+				v = val
+			}
+			entry[col] = v
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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 table_name FROM all_tables WHERE owner = '%s'", 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 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/kingbase_impl.go

@@ -0,0 +1,363 @@
+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
+}
+
+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",
+		address, port, config.User, config.Password, config.Database)
+
+	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 err
+	}
+	k.conn = db
+	return k.Ping()
+}
+
+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")
+	}
+	ctx, cancel := utils.ContextWithTimeout(5 * time.Second)
+	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 {
+			var v interface{}
+			val := values[i]
+			b, ok := val.([]byte)
+			if ok {
+				v = string(b)
+			} else {
+				v = val
+			}
+			entry[col] = v
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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) {
+	// Usually restricted to current database connection in PG/Kingbase
+	// dbName param is often Schema in PG context, or ignored if we are connected to a specific DB.
+	// But in PG, cross-database queries are not standard without dblink.
+	// We assume dbName here might mean Schema (public, etc.)
+
+	query := "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'"
+	if dbName != "" && dbName != "public" {
+		query = fmt.Sprintf("SELECT table_name FROM information_schema.tables WHERE table_schema = '%s'", dbName)
+	}
+
+	data, _, err := k.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var tables []string
+	for _, row := range data {
+		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/oracle_impl.go

@@ -0,0 +1,350 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"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
+}
+
+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?
+	}
+
+	address := fmt.Sprintf("%s:%d", config.Host, config.Port)
+	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.
+		}
+	}
+
+	// go-ora url structure: oracle://user:password@address:port/service_name
+	return fmt.Sprintf("oracle://%s:%s@%s/%s",
+		config.User, config.Password, address, database)
+}
+
+func (o *OracleDB) Connect(config connection.ConnectionConfig) error {
+	dsn := o.getDSN(config)
+	db, err := sql.Open("oracle", dsn)
+	if err != nil {
+		return err
+	}
+	o.conn = db
+	return o.Ping()
+}
+
+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")
+	}
+	ctx, cancel := utils.ContextWithTimeout(5 * time.Second)
+	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 {
+			var v interface{}
+			val := values[i]
+			b, ok := val.([]byte)
+			if ok {
+				v = string(b)
+			} else {
+				v = val
+			}
+			entry[col] = v
+		}
+		resultData = append(resultData, entry)
+	}
+
+	return resultData, columns, nil
+}
+
+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 table_name FROM all_tables WHERE owner = '%s'", strings.ToUpper(dbName))
+	}
+
+	data, _, err := o.Query(query)
+	if err != nil {
+		return nil, err
+	}
+
+	var tables []string
+	for _, row := range data {
+		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/sync/sync_engine.go

@@ -0,0 +1,179 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	"fmt"
+)
+
+// 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
+	Mode         string                      `json:"mode"`   // "insert_update", "full_overwrite"
+}
+
+// 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 {
+}
+
+func NewSyncEngine() *SyncEngine {
+	return &SyncEngine{}
+}
+
+// CompareAndSync performs the synchronization
+func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
+	result := SyncResult{Success: true, Logs: []string{}}
+
+	sourceDB, err := db.NewDatabase(config.SourceConfig.Type)
+	if err != nil {
+		return s.fail(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 {
+		return s.fail(result, "初始化目标数据库驱动失败: "+err.Error())
+	}
+
+	// Connect Source
+	result.Logs = append(result.Logs, fmt.Sprintf("正在连接源数据库: %s...", config.SourceConfig.Host))
+	if err := sourceDB.Connect(config.SourceConfig); err != nil {
+		return s.fail(result, "源数据库连接失败: "+err.Error())
+	}
+	defer sourceDB.Close()
+
+	// Connect Target
+	result.Logs = append(result.Logs, fmt.Sprintf("正在连接目标数据库: %s...", config.TargetConfig.Host))
+	if err := targetDB.Connect(config.TargetConfig); err != nil {
+		return s.fail(result, "目标数据库连接失败: "+err.Error())
+	}
+	defer targetDB.Close()
+
+	// Iterate Tables
+	for _, tableName := range config.Tables {
+		result.Logs = append(result.Logs, fmt.Sprintf("正在同步表: %s", tableName))
+
+		// 1. Get Columns & PKs (Naive approach: assume same schema)
+		cols, err := sourceDB.GetColumns(config.SourceConfig.Database, tableName)
+		if err != nil {
+			result.Logs = append(result.Logs, fmt.Sprintf("获取表 %s 的列信息失败: %v", tableName, err))
+			continue
+		}
+
+		pkCol := ""
+		for _, col := range cols {
+			if col.Key == "PRI" || col.Key == "PK" {
+				pkCol = col.Name
+				break
+			}
+		}
+
+		if pkCol == "" {
+			result.Logs = append(result.Logs, fmt.Sprintf("跳过表 %s: 未找到主键 (同步需要主键)", tableName))
+			continue
+		}
+
+		// 2. Fetch Data (MEMORY INTENSIVE - PROTOTYPE ONLY)
+		// TODO: Implement paging/streaming
+		sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", tableName))
+		if err != nil {
+			result.Logs = append(result.Logs, fmt.Sprintf("读取源表 %s 失败: %v", tableName, err))
+			continue
+		}
+
+		targetRows, _, err := targetDB.Query(fmt.Sprintf("SELECT * FROM %s", tableName))
+		if err != nil {
+			// Table might not exist in target?
+			// Check if error is "table not found" -> Try to Create?
+			// For now, assume table exists.
+			result.Logs = append(result.Logs, fmt.Sprintf("读取目标表 %s 失败: %v", tableName, err))
+			continue
+		}
+
+		// 3. Compare (In-Memory Hash Map)
+		targetMap := make(map[string]map[string]interface{})
+		for _, row := range targetRows {
+			pkVal := fmt.Sprintf("%v", row[pkCol])
+			targetMap[pkVal] = row
+		}
+
+		var inserts []map[string]interface{}
+		var updates []connection.UpdateRow
+		// var deletes []map[string]interface{} // Not implemented in "insert_update" mode usually
+
+		for _, sRow := range sourceRows {
+			pkVal := fmt.Sprintf("%v", sRow[pkCol])
+
+			if tRow, exists := targetMap[pkVal]; exists {
+				// Update? Compare values
+				// Simplified: Compare string representations or iterate keys
+				// For prototype: assume update if exists
+				// Optimization: Check diff
+				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: pkVal},
+						Values: changes,
+					})
+				}
+			} else {
+				// Insert
+				inserts = append(inserts, sRow)
+			}
+		}
+
+		// 4. Apply Changes
+		changeSet := connection.ChangeSet{
+			Inserts: inserts,
+			Updates: updates,
+		}
+
+		if len(inserts) > 0 || len(updates) > 0 {
+			result.Logs = append(result.Logs, fmt.Sprintf("  -> 需插入: %d 行, 需更新: %d 行", len(inserts), len(updates)))
+
+			// We need a BatchApplier interface or assume Database implements ApplyChanges
+			if applier, ok := targetDB.(db.BatchApplier); ok {
+				if err := applier.ApplyChanges(tableName, changeSet); err != nil {
+					result.Logs = append(result.Logs, fmt.Sprintf("  -> 应用变更失败: %v", err))
+				} else {
+					result.RowsInserted += len(inserts)
+					result.RowsUpdated += len(updates)
+				}
+			} else {
+				result.Logs = append(result.Logs, "  -> 目标驱动不支持应用数据变更 (ApplyChanges).")
+			}
+		} else {
+			result.Logs = append(result.Logs, "  -> 数据一致，无需变更.")
+		}
+
+		result.TablesSynced++
+	}
+
+	return result
+}
+
+func (s *SyncEngine) fail(res SyncResult, msg string) SyncResult {
+	res.Success = false
+	res.Message = msg
+	res.Logs = append(res.Logs, "致命错误: "+msg)
+	return res
+}