✨ feat(sync): 数据同步支持差异对比、行级选择与实时进度日志

- 新增差异分析/预览接口与前端预览抽屉（插入/更新/删除）
  - 支持按表勾选插入/更新/删除（删除默认不勾选）
  - 支持按主键选择行级同步；无主键/复合主键表跳过并提示
  - 同步过程实时输出中文日志与进度条，便于定位失败步骤

frontend/src/components/DataGrid.tsx

@@ -141,8 +141,7 @@ 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>;

frontend/src/components/DataSyncModal.tsx

@@ -1,14 +1,36 @@
-import React, { useState, useEffect } from 'react';
-import { Modal, Form, Select, Button, message, Steps, Transfer, Card, Alert, Divider, Typography } from 'antd';
+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 } from '../../wailsjs/go/app/App';
+import { DBGetDatabases, DBGetTables, DataSync, DataSyncAnalyze, DataSyncPreview } from '../../wailsjs/go/app/App';
 import { SavedConnection } from '../types';
-import { connection } from '../../wailsjs/go/models';
+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);
@@ -27,8 +49,76 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
   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) {
@@ -38,7 +128,23 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
         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]);
 
@@ -49,7 +155,7 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
       if (conn) {
           setLoading(true);
           try {
-            const res = await DBGetDatabases(conn.config as any);
+            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));
             }
@@ -65,7 +171,7 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
       if (conn) {
           setLoading(true);
           try {
-            const res = await DBGetDatabases(conn.config as any);
+            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));
             }
@@ -83,7 +189,7 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
       try {
           const conn = connections.find(c => c.id === sourceConnId);
           if (conn) {
-              const config = { ...conn.config, database: sourceDb };
+              const config = normalizeConnConfig(conn, sourceDb);
               const res = await DBGetTables(config as any, sourceDb);
               if (res.success) {
                   // DBGetTables returns [{Table: "name"}, ...]
@@ -98,36 +204,221 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
       setLoading(false);
   };
 
-  const runSync = async () => {
+  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, database: sourceDb },
-          targetConfig: { ...tConn.config, database: targetDb },
+          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,
-          mode: "insert_update"
+          content: syncContent,
+          mode: syncMode,
+          autoAddColumns,
+          tableOptions,
+          jobId,
       };
 
       try {
           const res = await DataSync(config as any);
           setSyncResult(res);
-          setCurrentStep(2);
+          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={onClose}
-      width={800}
-      footer={null}
-      destroyOnHidden
+        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" />
@@ -137,34 +428,67 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
 
       {/* STEP 1: CONFIG */}
       {currentStep === 0 && (
-          <div style={{ display: 'flex', gap: 24, justifyContent: 'center' }}>
-              <Card title="源数据库" style={{ width: 350 }}>
+          <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="连接">
-                          <Select value={sourceConnId} onChange={handleSourceConnChange}>
-                              {connections.map(c => <Option key={c.id} value={c.id}>{c.name} ({c.config.type})</Option>)}
+                      <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="数据库">
-                          <Select value={sourceDb} onChange={setSourceDb} showSearch>
-                              {sourceDbs.map(d => <Option key={d} value={d}>{d}</Option>)}
+                      <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>
-              </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>
+                          <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>
@@ -172,32 +496,155 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
 
       {/* STEP 2: TABLES */}
       {currentStep === 1 && (
-          <div style={{ height: 400 }}>
-              <Text type="secondary">请选择需要同步的表:</Text>
+          <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: 350, marginTop: 12 }}
+                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 && syncResult && (
+      {currentStep === 2 && (
           <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: ${syncResult.rowsUpdated}`}
-                type={syncResult.success ? "success" : "error"}
-                showIcon
+              <Alert
+                  message={syncing ? "正在同步" : (syncResult?.success ? "同步完成" : "同步失败")}
+                  description={
+                      syncing
+                          ? `当前阶段：${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 style={{ background: '#f5f5f5', padding: 12, height: 300, overflowY: 'auto', fontFamily: 'monospace' }}>
-                  {syncResult.logs.map((log: string, i: number) => <div key={i}>{log}</div>)}
+              <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>
       )}
@@ -206,20 +653,154 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
           {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 === 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 onClick={() => setCurrentStep(1)} style={{ marginRight: 8 }}>继续同步</Button>
-                  <Button type="primary" onClick={onClose}>关闭</Button>
+                  <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>
+    </>
   );
 };
 

frontend/src/components/DataViewer.tsx

@@ -1,4 +1,4 @@
-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';
@@ -11,6 +11,7 @@ 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 [pagination, setPagination] = useState({
       current: 1,
@@ -24,11 +25,12 @@ 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;
     }
 
@@ -135,15 +137,15 @@ const DataViewer: React.FC<{ tab: TabData }> = ({ tab }) => {
             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-${i}` }))); 
-            
+            setData(resultData.map((row: any, i: number) => ({ ...row, key: `row-${i}` })));
             setPagination(prev => ({ ...prev, current: page, pageSize: size, total: totalRecords }));
         } 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`,
@@ -155,7 +157,7 @@ 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.

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

@@ -29,6 +29,10 @@ export function DBShowCreateTable(arg1:connection.ConnectionConfig,arg2:string,a
 
 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>;

frontend/wailsjs/go/app/App.js

@@ -54,6 +54,14 @@ 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);
 }

frontend/wailsjs/go/models.ts

@@ -142,11 +142,37 @@ 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);
@@ -157,7 +183,11 @@ export namespace sync {
 	        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 {

internal/app/methods_sync.go

@@ -1,11 +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 {
-	engine := sync.NewSyncEngine()
-	return engine.RunSync(config)
+	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/db/custom_impl.go

@@ -88,19 +88,7 @@ func (c *CustomDB) 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 {
-				if b == nil {
-					v = nil
-				} else {
-					v = string(b)
-				}
-			} else {
-				v = val
-			}
-			entry[col] = v
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}

internal/db/dameng_impl.go

@@ -119,19 +119,7 @@ func (d *DamengDB) 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 {
-				if b == nil {
-					v = nil
-				} else {
-					v = string(b)
-				}
-			} else {
-				v = val
-			}
-			entry[col] = v
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}

internal/db/kingbase_impl.go

@@ -150,19 +150,7 @@ func (k *KingbaseDB) Query(query string) ([]map[string]interface{}, []string, er
 
 		entry := make(map[string]interface{})
 		for i, col := range columns {
-			var v interface{}
-			val := values[i]
-			b, ok := val.([]byte)
-			if ok {
-				if b == nil {
-					v = nil
-				} else {
-					v = string(b)
-				}
-			} else {
-				v = val
-			}
-			entry[col] = v
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}

internal/db/mysql_impl.go

@@ -48,7 +48,7 @@ func (m *MySQLDB) Connect(config connection.ConnectionConfig) error {
 	}
 	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)
@@ -107,19 +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 {
-				if b == nil {
-					v = nil
-				} else {
-					v = string(b)
-				}
-			} else {
-				v = val
-			}
-			entry[col] = v
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}
@@ -159,12 +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 {
@@ -185,7 +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
@@ -215,12 +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
@@ -248,14 +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"]),
@@ -345,12 +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
 		}
@@ -360,7 +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")
 		}
@@ -376,13 +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

@@ -125,19 +125,7 @@ func (o *OracleDB) 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 {
-				if b == nil {
-					v = nil
-				} else {
-					v = string(b)
-				}
-			} else {
-				v = val
-			}
-			entry[col] = v
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}

internal/db/postgres_impl.go

@@ -48,7 +48,7 @@ func (p *PostgresDB) Connect(config connection.ConnectionConfig) error {
 	}
 	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)
@@ -81,8 +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
 	}
@@ -108,19 +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 {
-				if b == nil {
-					v = nil
-				} else {
-					v = string(b)
-				}
-			} else {
-				v = val
-			}
-			entry[col] = v
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}
@@ -159,7 +146,7 @@ func (p *PostgresDB) GetTables(dbName string) ([]string, error) {
 	if err != nil {
 		return nil, err
 	}
-	
+
 	var tables []string
 	for _, row := range data {
 		schema, okSchema := row["schemaname"]

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

@@ -17,14 +17,14 @@ type SQLiteDB struct {
 }
 
 func (s *SQLiteDB) Connect(config connection.ConnectionConfig) error {
-	dsn := config.Host 
+	dsn := config.Host
 	db, err := sql.Open("sqlite", dsn)
 	if err != nil {
 		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)
@@ -83,19 +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 {
-				if b == nil {
-					v = nil
-				} else {
-					v = string(b)
-				}
-			} else {
-				v = val
-			}
-			entry[col] = v
+			entry[col] = normalizeQueryValue(values[i])
 		}
 		resultData = append(resultData, entry)
 	}
@@ -124,7 +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/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

@@ -5,15 +5,21 @@ import (
 	"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
-	Mode         string                      `json:"mode"`   // "insert_update", "full_overwrite"
+	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
@@ -28,21 +34,55 @@ type SyncResult struct {
 }
 
 type SyncEngine struct {
+	reporter Reporter
 }
 
-func NewSyncEngine() *SyncEngine {
-	return &SyncEngine{}
+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(result, "初始化源数据库驱动失败: "+err.Error())
+		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
@@ -51,133 +91,402 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 	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(result, "初始化目标数据库驱动失败: "+err.Error())
+		return s.fail(config.JobID, totalTables, 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))
+	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(result, "源数据库连接失败: "+err.Error())
+		return s.fail(config.JobID, totalTables, 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))
+	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(result, "目标数据库连接失败: "+err.Error())
+		return s.fail(config.JobID, totalTables, 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))
+	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")
 
-		// 1. Get Columns & PKs (Naive approach: assume same schema)
-		cols, err := sourceDB.GetColumns(config.SourceConfig.Database, tableName)
-		if err != nil {
-			logger.Error(err, "获取源表列信息失败：表=%s", tableName)
-			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 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
 			}
-		}
 
-		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
-		}
+			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)
 
-		// 2. Fetch Data (MEMORY INTENSIVE - PROTOTYPE ONLY)
-		// TODO: Implement paging/streaming
-		sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", tableName))
-		if err != nil {
-			logger.Error(err, "读取源表失败：表=%s", tableName)
-			result.Logs = append(result.Logs, fmt.Sprintf("读取源表 %s 失败: %v", tableName, err))
-			continue
-		}
+			// 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
+			}
 
-		targetRows, _, err := targetDB.Query(fmt.Sprintf("SELECT * FROM %s", tableName))
-		if err != nil {
-			logger.Error(err, "读取目标表失败：表=%s", tableName)
-			// 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
-		}
+			pkCols := make([]string, 0, 2)
+			for _, col := range cols {
+				if col.Key == "PRI" || col.Key == "PK" {
+					pkCols = append(pkCols, col.Name)
+				}
+			}
 
-		// 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
-		}
+			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]
 
-		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
+			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 len(changes) > 0 {
-					updates = append(updates, connection.UpdateRow{
-						Keys:   map[string]interface{}{pkCol: pkVal},
-						Values: changes,
-					})
-				}
-			} else {
-				// Insert
-				inserts = append(inserts, sRow)
 			}
-		}
+			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
+			}
 
-		// 4. Apply Changes
-		changeSet := connection.ChangeSet{
-			Inserts: inserts,
-			Updates: updates,
-		}
+			// 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
+			}
 
-		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)))
+			var inserts []map[string]interface{}
+			var updates []connection.UpdateRow
 
-			// 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))
+			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 {
-					result.RowsInserted += len(inserts)
-					result.RowsUpdated += len(updates)
+					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 {
-				result.Logs = append(result.Logs, "  -> 目标驱动不支持应用数据变更 (ApplyChanges).")
+				s.appendLog(config.JobID, &result, "info", "  -> 数据一致，无需变更.")
 			}
-		} else {
-			result.Logs = append(result.Logs, "  -> 数据一致，无需变更.")
-		}
 
-		result.TablesSynced++
+			result.TablesSynced++
+		}()
 	}
 
+	s.progress(config.JobID, totalTables, totalTables, "", "同步完成")
 	return result
 }
 
@@ -196,9 +505,52 @@ func formatConnSummaryForSync(config connection.ConnectionConfig) string {
 		config.Type, config.Host, config.Port, dbName, config.User, timeoutSeconds)
 }
 
-func (s *SyncEngine) fail(res SyncResult, msg string) SyncResult {
+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
-	res.Logs = append(res.Logs, "致命错误: "+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"`
+}