✨ feat(data-sync): 扩展跨库迁移链路并优化数据同步交互

- 统一同库同步与跨库迁移入口，补充模式区分与风险提示
- 扩展 ClickHouse 与 PG-like 双向迁移，并新增 PG-like、ClickHouse、TDengine 到 MongoDB 的迁移路由
- 完善 TDengine 目标端建表规划、回归测试与需求追踪文档
- refs #51

frontend/package.json.md5

@@ -1 +1 @@
-d0f9366af59a6367ad3c7e2d4185ead4
+5b8157374dae5f9340e31b2d0bd2c00e

frontend/src/components/DataSyncModal.tsx

@@ -1,9 +1,11 @@
 import React, { useState, useEffect, useMemo, useRef } from 'react';
-import { Modal, Form, Select, Button, message, Steps, Transfer, Card, Alert, Divider, Typography, Progress, Checkbox, Table, Drawer, Tabs } from 'antd';
+import { Modal, Form, Select, Input, Button, message, Steps, Transfer, Card, Alert, Divider, Typography, Progress, Checkbox, Table, Drawer, Tabs, theme as antdTheme } from 'antd';
+import { DatabaseOutlined, RocketOutlined, SwapOutlined, TableOutlined } from '@ant-design/icons';
 import { useStore } from '../store';
 import { DBGetDatabases, DBGetTables, DataSync, DataSyncAnalyze, DataSyncPreview } from '../../wailsjs/go/app/App';
 import { SavedConnection } from '../types';
 import { EventsOn } from '../../wailsjs/runtime/runtime';
+import { normalizeOpacityForPlatform, resolveAppearanceValues } from '../utils/appearance';
 
 const { Title, Text } = Typography;
 const { Step } = Steps;
@@ -21,6 +23,12 @@ type TableDiffSummary = {
   deletes?: number;
   same?: number;
   message?: string;
+  targetTableExists?: boolean;
+  plannedAction?: string;
+  warnings?: string[];
+  unsupportedObjects?: string[];
+  indexesToCreate?: number;
+  indexesSkipped?: number;
 };
 type TableOps = {
   insert: boolean;
@@ -31,6 +39,8 @@ type TableOps = {
   selectedDeletePks?: string[];
 };
 
+type WorkflowType = 'sync' | 'migration';
+
 const quoteSqlIdent = (dbType: string, ident: string): string => {
   const raw = String(ident || '').trim();
   if (!raw) return raw;
@@ -76,6 +86,11 @@ const toSqlLiteral = (value: any, dbType: string): string => {
   return `'${String(value).replace(/'/g, "''")}'`;
 };
 
+const resolveRedisDbIndex = (raw?: string): number => {
+  const value = Number(String(raw || '').trim());
+  return Number.isInteger(value) && value >= 0 && value <= 15 ? value : 0;
+};
+
 const buildSqlPreview = (
   previewData: any,
   tableName: string,
@@ -145,8 +160,14 @@ const buildSqlPreview = (
 
 const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open, onClose }) => {
   const connections = useStore((state) => state.connections);
+  const themeMode = useStore((state) => state.theme);
+  const appearance = useStore((state) => state.appearance);
   const [currentStep, setCurrentStep] = useState(0);
   const [loading, setLoading] = useState(false);
+  const { token } = antdTheme.useToken();
+  const darkMode = themeMode === 'dark';
+  const resolvedAppearance = resolveAppearanceValues(appearance);
+  const effectiveOpacity = normalizeOpacityForPlatform(resolvedAppearance.opacity);
   
   // Step 1: Config
   const [sourceConnId, setSourceConnId] = useState<string>('');
@@ -162,9 +183,13 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
   const [selectedTables, setSelectedTables] = useState<string[]>([]);
 
   // Options
+  const [workflowType, setWorkflowType] = useState<WorkflowType>('sync');
   const [syncContent, setSyncContent] = useState<'data' | 'schema' | 'both'>('data');
   const [syncMode, setSyncMode] = useState<string>('insert_update');
   const [autoAddColumns, setAutoAddColumns] = useState<boolean>(true);
+  const [targetTableStrategy, setTargetTableStrategy] = useState<'existing_only' | 'auto_create_if_missing' | 'smart'>('existing_only');
+  const [createIndexes, setCreateIndexes] = useState<boolean>(false);
+  const [mongoCollectionName, setMongoCollectionName] = useState<string>('');
   const [showSameTables, setShowSameTables] = useState<boolean>(false);
   const [analyzing, setAnalyzing] = useState<boolean>(false);
   const [diffTables, setDiffTables] = useState<TableDiffSummary[]>([]);
@@ -240,9 +265,12 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
         setSourceDb('');
         setTargetDb('');
         setSelectedTables([]);
+        setWorkflowType('sync');
         setSyncContent('data');
         setSyncMode('insert_update');
         setAutoAddColumns(true);
+        setTargetTableStrategy('existing_only');
+        setCreateIndexes(false);
         setShowSameTables(false);
         setAnalyzing(false);
         setDiffTables([]);
@@ -260,6 +288,30 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
     }
   }, [open]);
 
+  useEffect(() => {
+      if (workflowType === 'migration') {
+          if (syncMode === 'insert_update') {
+              setSyncMode('insert_only');
+          }
+          if (syncContent === 'schema') {
+              setSyncContent('both');
+          }
+          if (targetTableStrategy === 'existing_only') {
+              setTargetTableStrategy('smart');
+          }
+          if (!createIndexes) {
+              setCreateIndexes(true);
+          }
+      } else {
+          if (targetTableStrategy !== 'existing_only') {
+              setTargetTableStrategy('existing_only');
+          }
+          if (createIndexes) {
+              setCreateIndexes(false);
+          }
+      }
+  }, [workflowType]);
+
   const handleSourceConnChange = async (connId: string) => {
       setSourceConnId(connId);
       setSourceDb('');
@@ -357,6 +409,9 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
           content: syncContent,
           mode: "insert_update",
           autoAddColumns,
+          targetTableStrategy,
+          createIndexes,
+          mongoCollectionName: mongoCollectionName.trim(),
           jobId,
       };
 
@@ -407,6 +462,9 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
           content: "data",
           mode: "insert_update",
           autoAddColumns,
+          targetTableStrategy,
+          createIndexes,
+          mongoCollectionName: mongoCollectionName.trim(),
       };
 
       try {
@@ -483,6 +541,9 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
           content: syncContent,
           mode: syncMode,
           autoAddColumns,
+          targetTableStrategy,
+          createIndexes,
+          mongoCollectionName: mongoCollectionName.trim(),
           tableOptions,
           jobId,
       };
@@ -530,10 +591,132 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
       return buildSqlPreview(previewData, previewTable, targetType, ops);
   }, [previewData, previewTable, targetConnId, connections, tableOptions]);
 
+  const analysisWarnings = useMemo(() => {
+      const items: string[] = [];
+      diffTables.forEach((table) => {
+          (table.warnings || []).forEach((warning) => items.push(`${table.table}: ${warning}`));
+          (table.unsupportedObjects || []).forEach((warning) => items.push(`${table.table}: ${warning}`));
+      });
+      return Array.from(new Set(items));
+  }, [diffTables]);
+
+  const isMigrationWorkflow = workflowType === 'migration';
+  const sourceConn = useMemo(() => connections.find(c => c.id === sourceConnId), [connections, sourceConnId]);
+  const targetConn = useMemo(() => connections.find(c => c.id === targetConnId), [connections, targetConnId]);
+  const sourceType = String(sourceConn?.config?.type || '').toLowerCase();
+  const targetType = String(targetConn?.config?.type || '').toLowerCase();
+  const isRedisMongoKeyspaceMigration = isMigrationWorkflow && (
+      (sourceType === 'redis' && targetType === 'mongodb') ||
+      (sourceType === 'mongodb' && targetType === 'redis')
+  );
+  const defaultMongoCollectionName = useMemo(() => {
+      if (sourceType === 'redis' && targetType === 'mongodb') {
+          return `redis_db_${resolveRedisDbIndex(sourceDb || sourceConn?.config?.database)}_keys`;
+      }
+      if (sourceType === 'mongodb' && targetType === 'redis') {
+          return selectedTables[0] || `redis_db_${resolveRedisDbIndex(targetDb || targetConn?.config?.database)}_keys`;
+      }
+      return '';
+  }, [sourceType, targetType, sourceDb, targetDb, sourceConn, targetConn, selectedTables]);
+
+  const modalPanelStyle = useMemo(() => ({
+      background: darkMode
+          ? 'linear-gradient(180deg, rgba(16,22,34,0.96) 0%, rgba(10,14,24,0.98) 100%)'
+          : 'linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(246,248,252,0.98) 100%)',
+      border: darkMode ? '1px solid rgba(255,255,255,0.08)' : '1px solid rgba(16,24,40,0.08)',
+      boxShadow: darkMode ? '0 24px 56px rgba(0,0,0,0.36)' : '0 18px 44px rgba(15,23,42,0.14)',
+      backdropFilter: darkMode ? 'blur(18px)' : 'none',
+  }), [darkMode]);
+
+  const shellCardStyle = useMemo<React.CSSProperties>(() => ({
+      borderRadius: 18,
+      border: darkMode ? '1px solid rgba(255,255,255,0.08)' : '1px solid rgba(15,23,42,0.08)',
+      background: darkMode ? 'rgba(255,255,255,0.03)' : `rgba(255,255,255,${Math.max(effectiveOpacity, 0.88)})`,
+      boxShadow: darkMode ? '0 12px 32px rgba(0,0,0,0.22)' : '0 10px 24px rgba(15,23,42,0.08)',
+      overflow: 'hidden',
+  }), [darkMode, effectiveOpacity]);
+
+  const heroPanelStyle = useMemo<React.CSSProperties>(() => ({
+      padding: 18,
+      borderRadius: 18,
+      border: darkMode ? '1px solid rgba(255,214,102,0.12)' : '1px solid rgba(24,144,255,0.12)',
+      background: darkMode
+          ? 'linear-gradient(135deg, rgba(255,214,102,0.10) 0%, rgba(255,255,255,0.03) 100%)'
+          : 'linear-gradient(135deg, rgba(24,144,255,0.10) 0%, rgba(255,255,255,0.95) 100%)',
+      marginBottom: 18,
+  }), [darkMode]);
+
+  const badgeStyle = useMemo<React.CSSProperties>(() => ({
+      display: 'inline-flex',
+      alignItems: 'center',
+      gap: 6,
+      padding: '6px 10px',
+      borderRadius: 999,
+      border: darkMode ? '1px solid rgba(255,255,255,0.10)' : '1px solid rgba(15,23,42,0.08)',
+      background: darkMode ? 'rgba(255,255,255,0.04)' : 'rgba(255,255,255,0.86)',
+      color: darkMode ? 'rgba(255,255,255,0.88)' : '#334155',
+      fontSize: 12,
+      fontWeight: 600,
+  }), [darkMode]);
+
+  const quietPanelStyle = useMemo<React.CSSProperties>(() => ({
+      padding: 14,
+      borderRadius: 16,
+      border: darkMode ? '1px solid rgba(255,255,255,0.08)' : '1px solid rgba(15,23,42,0.08)',
+      background: darkMode ? 'rgba(255,255,255,0.025)' : 'rgba(248,250,252,0.92)',
+  }), [darkMode]);
+
+  const modalWorkspaceStyle = useMemo<React.CSSProperties>(() => ({
+      display: 'flex',
+      flexDirection: 'column',
+      height: '100%',
+      minHeight: 0,
+  }), []);
+
+  const modalScrollableContentStyle = useMemo<React.CSSProperties>(() => ({
+      flex: 1,
+      minHeight: 0,
+      overflowY: 'auto',
+      overflowX: 'hidden',
+      paddingRight: 4,
+      overscrollBehavior: 'contain',
+  }), []);
+
+  const modalFooterBarStyle = useMemo<React.CSSProperties>(() => ({
+      marginTop: 18,
+      display: 'flex',
+      justifyContent: 'flex-end',
+      gap: 8,
+      paddingTop: 12,
+      borderTop: darkMode ? '1px solid rgba(255,255,255,0.06)' : '1px solid rgba(15,23,42,0.06)',
+      flex: '0 0 auto',
+  }), [darkMode]);
+
+  const renderModalTitle = (title: string, description: string) => (
+      <div style={{ display: 'flex', alignItems: 'flex-start', gap: 12 }}>
+          <div style={{
+              width: 38,
+              height: 38,
+              borderRadius: 14,
+              display: 'grid',
+              placeItems: 'center',
+              background: darkMode ? 'rgba(255,214,102,0.12)' : 'rgba(24,144,255,0.10)',
+              color: darkMode ? '#ffd666' : token.colorPrimary,
+              flexShrink: 0,
+          }}>
+              {isMigrationWorkflow ? <RocketOutlined /> : <SwapOutlined />}
+          </div>
+          <div style={{ minWidth: 0 }}>
+              <div style={{ fontSize: 16, fontWeight: 700, color: darkMode ? '#f8fafc' : '#0f172a' }}>{title}</div>
+              <div style={{ marginTop: 4, fontSize: 12, lineHeight: 1.6, color: darkMode ? 'rgba(255,255,255,0.56)' : 'rgba(15,23,42,0.58)' }}>{description}</div>
+          </div>
+      </div>
+  );
+
   return (
     <>
     <Modal
-        title="数据同步"
+        title={renderModalTitle(isMigrationWorkflow ? '跨库迁移工作台' : '数据同步工作台', isMigrationWorkflow ? '按源库 → 目标库完成建表、导入与风险预检。' : '按已有目标表完成差异对比、同步执行与结果确认。')}
         open={open}
         onCancel={() => {
             if (syncing) {
@@ -542,23 +725,61 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
             }
             onClose();
         }}
-        width={800}
+        width={920}
         footer={null}
         destroyOnHidden
         closable={!syncing}
         maskClosable={!syncing}
+        styles={{
+            content: modalPanelStyle,
+            header: { background: 'transparent', borderBottom: 'none', paddingBottom: 10 },
+            body: {
+                paddingTop: 8,
+                height: 760,
+                maxHeight: 'calc(100vh - 120px)',
+                overflow: 'hidden',
+                display: 'flex',
+                flexDirection: 'column',
+            },
+            footer: { background: 'transparent', borderTop: 'none', paddingTop: 12 },
+        }}
     >
+      <div style={modalWorkspaceStyle}>
+      <div style={{ flex: '0 0 auto' }}>
+      <div style={heroPanelStyle}>
+          <div style={{ display: 'flex', justifyContent: 'space-between', gap: 12, alignItems: 'flex-start', flexWrap: 'wrap' }}>
+              <div style={{ minWidth: 0 }}>
+                  <div style={{ fontSize: 18, fontWeight: 700, color: darkMode ? '#f8fafc' : '#0f172a' }}>{isMigrationWorkflow ? '跨数据源迁移' : '数据同步'}</div>
+                  <div style={{ marginTop: 6, fontSize: 13, lineHeight: 1.7, color: darkMode ? 'rgba(255,255,255,0.62)' : 'rgba(15,23,42,0.62)' }}>
+                      {isMigrationWorkflow
+                          ? '适合把源表迁移到另一套数据库，可按策略自动建表、导入数据并补建可兼容索引。'
+                          : '适合目标表已存在的场景，先做差异分析，再按勾选执行插入、更新或删除。'}
+                  </div>
+              </div>
+              <div style={{ display: 'flex', flexWrap: 'wrap', gap: 8 }}>
+                  <span style={badgeStyle}>{isMigrationWorkflow ? <RocketOutlined /> : <SwapOutlined />} {isMigrationWorkflow ? '迁移模式' : '同步模式'}</span>
+                  <span style={badgeStyle}><DatabaseOutlined /> {sourceConnId ? '已选源连接' : '待选源连接'}</span>
+                  <span style={badgeStyle}><TableOutlined /> {selectedTables.length || 0} 张表</span>
+              </div>
+          </div>
+      </div>
       <Steps current={currentStep} style={{ marginBottom: 24 }}>
         <Step title="配置源与目标" />
         <Step title="选择表" />
         <Step title="执行结果" />
       </Steps>
+      </div>
 
+      <div style={modalScrollableContentStyle}>
       {/* STEP 1: CONFIG */}
       {currentStep === 0 && (
           <div>
-              <div style={{ display: 'flex', gap: 24, justifyContent: 'center' }}>
-                  <Card title="源数据库" style={{ width: 350 }}>
+              <div style={{ display: 'grid', gridTemplateColumns: 'minmax(0, 1fr) 44px minmax(0, 1fr)', gap: 18, alignItems: 'stretch' }}>
+                  <Card
+                      title="源数据库"
+                      style={shellCardStyle}
+                      styles={{ header: { borderBottom: darkMode ? '1px solid rgba(255,255,255,0.08)' : '1px solid rgba(15,23,42,0.06)', fontWeight: 700 }, body: { padding: 18 } }}
+                  >
                       <Form layout="vertical">
                           <Form.Item label="连接">
                               <Select value={sourceConnId} onChange={handleSourceConnChange}>
@@ -572,8 +793,16 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                           </Form.Item>
                       </Form>
                   </Card>
-                  <div style={{ display: 'flex', alignItems: 'center' }}>至</div>
-                  <Card title="目标数据库" style={{ width: 350 }}>
+                  <div style={{ display: 'grid', placeItems: 'center' }}>
+                      <div style={{ ...badgeStyle, width: 44, height: 44, borderRadius: 14, justifyContent: 'center', padding: 0 }}>
+                          <SwapOutlined />
+                      </div>
+                  </div>
+                  <Card
+                      title="目标数据库"
+                      style={shellCardStyle}
+                      styles={{ header: { borderBottom: darkMode ? '1px solid rgba(255,255,255,0.08)' : '1px solid rgba(15,23,42,0.06)', fontWeight: 700 }, body: { padding: 18 } }}
+                  >
                       <Form layout="vertical">
                           <Form.Item label="连接">
                               <Select value={targetConnId} onChange={handleTargetConnChange}>
@@ -589,27 +818,94 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                   </Card>
               </div>
 
-              <Card title="同步选项" style={{ marginTop: 16 }}>
+              <Card
+                  title={isMigrationWorkflow ? '迁移选项' : '同步选项'}
+                  style={{ ...shellCardStyle, marginTop: 18 }}
+                  styles={{ header: { borderBottom: darkMode ? '1px solid rgba(255,255,255,0.08)' : '1px solid rgba(15,23,42,0.06)', fontWeight: 700 }, body: { padding: 18 } }}
+              >
+                  <div style={{ ...quietPanelStyle, marginBottom: 14 }}>
+                      <Text style={{ color: darkMode ? 'rgba(255,255,255,0.72)' : 'rgba(15,23,42,0.68)', lineHeight: 1.7 }}>
+                          先明确当前要做的是“已有目标表同步”还是“跨库迁移”，页面会按功能类型自动给出更安全的默认策略。
+                      </Text>
+                  </div>
                   <Form layout="vertical">
-                      <Form.Item label="同步内容">
+                      <Form.Item label="功能类型">
+                          <Select value={workflowType} onChange={setWorkflowType}>
+                              <Option value="sync">数据同步（基于已有目标表做差异同步）</Option>
+                              <Option value="migration">跨库迁移（可自动建表后导入）</Option>
+                          </Select>
+                      </Form.Item>
+                      <Alert
+                          type={isMigrationWorkflow ? 'info' : 'success'}
+                          showIcon
+                          style={{ marginBottom: 12 }}
+                          message={isMigrationWorkflow
+                              ? '当前为“跨库迁移”模式：适合将表迁移到另一数据源，可自动建表并导入数据。'
+                              : '当前为“数据同步”模式：适合目标表已存在时做增量同步或覆盖导入。'}
+                      />
+                      <Form.Item label={isMigrationWorkflow ? '迁移内容' : '同步内容'}>
                           <Select value={syncContent} onChange={setSyncContent}>
                               <Option value="data">仅同步数据</Option>
                               <Option value="schema">仅同步结构</Option>
                               <Option value="both">同步结构 + 数据</Option>
                           </Select>
                       </Form.Item>
-                      <Form.Item label="同步模式">
+                      <Form.Item label={isMigrationWorkflow ? '迁移模式' : '同步模式'}>
                           <Select value={syncMode} onChange={setSyncMode} disabled={syncContent === 'schema'}>
                               <Option value="insert_update">增量同步（对比差异，按插入/更新/删除勾选执行）</Option>
                               <Option value="insert_only">仅插入（不对比目标；无主键表将跳过）</Option>
                               <Option value="full_overwrite">全量覆盖（清空目标表后插入）</Option>
                           </Select>
                       </Form.Item>
+                      <Form.Item label={isMigrationWorkflow ? '目标表处理策略' : '目标表要求'}>
+                          <Select value={targetTableStrategy} onChange={setTargetTableStrategy} disabled={!isMigrationWorkflow}>
+                              <Option value="existing_only">仅使用已有目标表</Option>
+                              <Option value="auto_create_if_missing">目标表不存在时自动建表后导入</Option>
+                              <Option value="smart">智能模式（存在则直接导入，不存在则自动建表）</Option>
+                          </Select>
+                      </Form.Item>
+                      {isRedisMongoKeyspaceMigration && (
+                          <Form.Item
+                              label="Mongo 集合名（可选）"
+                              extra={sourceType === 'redis'
+                                  ? '为空时沿用默认集合名；填写后本次 Redis 键空间会统一写入该 Mongo 集合。'
+                                  : 'MongoDB → Redis 场景下通常直接选择源集合；这里留空即可，未显式选集合时才会回退使用该名称。'}
+                          >
+                              <Input
+                                  value={mongoCollectionName}
+                                  onChange={(e) => setMongoCollectionName(e.target.value)}
+                                  placeholder={defaultMongoCollectionName || '请输入 Mongo 集合名'}
+                                  allowClear
+                                  maxLength={128}
+                              />
+                          </Form.Item>
+                      )}
                       <Form.Item>
                           <Checkbox checked={autoAddColumns} onChange={(e) => setAutoAddColumns(e.target.checked)}>
-                              自动补齐目标表缺失字段（仅 MySQL 目标）
+                              自动补齐目标表缺失字段（当前支持 MySQL 目标及 MySQL → Kingbase）
                           </Checkbox>
                       </Form.Item>
+                      <Form.Item>
+                          <Checkbox checked={createIndexes} onChange={(e) => setCreateIndexes(e.target.checked)} disabled={!isMigrationWorkflow || targetTableStrategy === 'existing_only'}>
+                              自动迁移可兼容的普通索引/唯一索引（仅自动建表模式生效）
+                          </Checkbox>
+                      </Form.Item>
+                      {isMigrationWorkflow && targetTableStrategy !== 'existing_only' && (
+                          <Alert
+                              type="info"
+                              showIcon
+                              message="自动建表模式首期仅支持 MySQL → Kingbase；将迁移字段、主键、普通/唯一/联合索引，并显式跳过全文、空间、前缀、函数类索引。"
+                              style={{ marginBottom: 12 }}
+                          />
+                      )}
+                      {!isMigrationWorkflow && (
+                          <Alert
+                              type="info"
+                              showIcon
+                              message="数据同步模式默认基于已有目标表执行；如需跨数据源建表导入，请切换到“跨库迁移”。"
+                              style={{ marginBottom: 12 }}
+                          />
+                      )}
                       {syncContent !== 'schema' && syncMode === 'full_overwrite' && (
                           <Alert
                               type="warning"
@@ -624,26 +920,42 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
 
       {/* STEP 2: TABLES */}
       {currentStep === 1 && (
-          <div style={{ display: 'flex', flexDirection: 'column', gap: 12 }}>
-              <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
-                  <Text type="secondary">请选择需要同步的表:</Text>
+          <div style={{ display: 'flex', flexDirection: 'column', gap: 14 }}>
+              <div style={quietPanelStyle}>
+                  <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: 10 }}>
+                      <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
+                  </div>
+                  <Transfer
                 dataSource={allTables.map(t => ({ key: t, title: t }))}
                 titles={['源表', '已选表']}
                 targetKeys={selectedTables}
                 onChange={(keys) => setSelectedTables(keys as string[])}
                 render={item => item.title}
-                listStyle={{ width: 350, height: 280, marginTop: 0 }}
-                locale={{ itemUnit: '项', itemsUnit: '项', searchPlaceholder: '搜索表', notFoundContent: '暂无数据' }}
+                listStyle={{ width: 390, height: 320, marginTop: 0, borderRadius: 14, overflow: 'hidden' }}
+                locale={{ itemUnit: '项', itemsUnit: '项', searchPlaceholder: '搜索表…', notFoundContent: '暂无数据' }}
               />
+              </div>
 
               {diffTables.length > 0 && (
-                  <div>
-                      <Divider orientation="left">对比结果</Divider>
+                  <div style={quietPanelStyle}>
+                      <Divider orientation="left" style={{ marginTop: 0 }}>对比结果</Divider>
+                      {analysisWarnings.length > 0 && (
+                          <Alert
+                              type="warning"
+                              showIcon
+                              message="预检发现风险或降级项，请在执行前确认"
+                              description={
+                                  <ul style={{ margin: 0, paddingLeft: 18 }}>
+                                      {analysisWarnings.slice(0, 8).map((item) => <li key={item}>{item}</li>)}
+                                      {analysisWarnings.length > 8 && <li>还有 {analysisWarnings.length - 8} 项未展开</li>}
+                                  </ul>
+                              }
+                              style={{ marginBottom: 12 }}
+                          />
+                      )}
                       <Table
                           size="small"
                           pagination={false}
@@ -655,13 +967,29 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                               const same = Number(t.same || 0);
                               const msg = String(t.message || '').trim();
                               const can = !!t.canSync;
+                              const warns = Array.isArray(t.warnings) ? t.warnings.length : 0;
+                              const unsupported = Array.isArray(t.unsupportedObjects) ? t.unsupportedObjects.length : 0;
                               if (showSameTables) return true;
                               if (!can) return true;
-                              if (msg) return true;
+                              if (msg || warns > 0 || unsupported > 0) return true;
                               return ins > 0 || upd > 0 || del > 0 || same === 0;
                           })}
                           columns={[
                               { title: '表名', dataIndex: 'table', key: 'table', ellipsis: true },
+                              {
+                                  title: '目标表',
+                                  key: 'targetTableExists',
+                                  width: 90,
+                                  render: (_: any, r: any) => r.targetTableExists ? '已存在' : '不存在'
+                              },
+                              {
+                                  title: '计划',
+                                  dataIndex: 'plannedAction',
+                                  key: 'plannedAction',
+                                  width: 220,
+                                  ellipsis: true,
+                                  render: (v: any) => String(v || '')
+                              },
                               {
                                   title: '插入',
                                   key: 'inserts',
@@ -670,11 +998,7 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                                       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)}
-                                          >
+                                          <Checkbox checked={!!ops.insert} disabled={disabled} onChange={(e) => updateTableOption(r.table, 'insert', e.target.checked)}>
                                               {Number(r.inserts || 0)}
                                           </Checkbox>
                                       );
@@ -688,11 +1012,7 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                                       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)}
-                                          >
+                                          <Checkbox checked={!!ops.update} disabled={disabled} onChange={(e) => updateTableOption(r.table, 'update', e.target.checked)}>
                                               {Number(r.updates || 0)}
                                           </Checkbox>
                                       );
@@ -706,18 +1026,28 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                                       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)}
-                                          >
+                                          <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: '风险',
+                                  key: 'warnings',
+                                  width: 220,
+                                  render: (_: any, r: any) => {
+                                      const warns = [...(Array.isArray(r.warnings) ? r.warnings : []), ...(Array.isArray(r.unsupportedObjects) ? r.unsupportedObjects : [])];
+                                      if (warns.length === 0) return '-';
+                                      return (
+                                          <div style={{ color: '#d48806', fontSize: 12, lineHeight: 1.5 }}>
+                                              {warns.slice(0, 2).map((item: string) => <div key={item}>{item}</div>)}
+                                              {warns.length > 2 && <div>还有 {warns.length - 2} 项</div>}
+                                          </div>
+                                      );
+                                  }
+                              },
                               {
                                   title: '预览',
                                   key: 'preview',
@@ -741,7 +1071,8 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
 
       {/* STEP 3: RESULT */}
       {currentStep === 2 && (
-          <div>
+          <div style={{ display: 'flex', flexDirection: 'column', gap: 14 }}>
+              <div style={quietPanelStyle}>
               <Alert
                   message={syncing ? "正在同步" : (syncResult?.success ? "同步完成" : "同步失败")}
                   description={
@@ -753,7 +1084,7 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                   showIcon
               />
 
-              <div style={{ marginTop: 12 }}>
+              <div style={{ marginTop: 14 }}>
                   <Progress
                       percent={syncProgress.percent}
                       status={syncing ? "active" : (syncResult?.success ? "success" : "exception")}
@@ -761,7 +1092,9 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                   />
               </div>
 
-              <Divider orientation="left">日志</Divider>
+              </div>
+              <div style={quietPanelStyle}>
+              <Divider orientation="left" style={{ marginTop: 0 }}>执行日志</Divider>
               <div
                   ref={logBoxRef}
                   onScroll={() => {
@@ -770,14 +1103,25 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
                       const nearBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 40;
                       autoScrollRef.current = nearBottom;
                   }}
-                  style={{ background: '#f5f5f5', padding: 12, height: 300, overflowY: 'auto', fontFamily: 'monospace' }}
+                  style={{
+                      background: darkMode ? 'rgba(255,255,255,0.03)' : 'rgba(248,250,252,0.92)',
+                      border: darkMode ? '1px solid rgba(255,255,255,0.08)' : '1px solid rgba(15,23,42,0.06)',
+                      borderRadius: 14,
+                      padding: 12,
+                      height: 300,
+                      overflowY: 'auto',
+                      fontFamily: 'SFMono-Regular, ui-monospace, Menlo, Consolas, monospace'
+                  }}
               >
                   {syncLogs.map((item, i: number) => <div key={i}>{renderSyncLogItem(item)}</div>)}
               </div>
+              </div>
           </div>
       )}
 
-      <div style={{ marginTop: 24, textAlign: 'right' }}>
+      </div>
+
+      <div style={modalFooterBarStyle}>
           {currentStep === 0 && (
               <Button type="primary" onClick={nextToTables} loading={loading}>下一步</Button>
           )}
@@ -804,14 +1148,16 @@ const DataSyncModal: React.FC<{ open: boolean; onClose: () => void }> = ({ open,
               </>
           )}
       </div>
+      </div>
     </Modal>
     <Drawer
         title={`差异预览：${previewTable}`}
+        styles={{ body: { background: darkMode ? 'rgba(9,13,20,0.98)' : '#f8fafc' } }}
         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 && <Alert type="info" showIcon message="正在加载差异预览…" />}
         {!previewLoading && previewData && (
             <div>
                 <Alert

frontend/wailsjs/go/models.ts

@@ -277,6 +277,9 @@ export namespace sync {
 	    mode: string;
 	    jobId?: string;
 	    autoAddColumns?: boolean;
+	    targetTableStrategy?: string;
+	    createIndexes?: boolean;
+	    mongoCollectionName?: string;
 	    tableOptions?: Record<string, TableOptions>;
 	
 	    static createFrom(source: any = {}) {
@@ -292,6 +295,9 @@ export namespace sync {
 	        this.mode = source["mode"];
 	        this.jobId = source["jobId"];
 	        this.autoAddColumns = source["autoAddColumns"];
+	        this.targetTableStrategy = source["targetTableStrategy"];
+	        this.createIndexes = source["createIndexes"];
+	        this.mongoCollectionName = source["mongoCollectionName"];
 	        this.tableOptions = this.convertValues(source["tableOptions"], TableOptions, true);
 	    }
 	

internal/app/db_context.go

@@ -1,6 +1,7 @@
 package app
 
 import (
+	"strconv"
 	"strings"
 
 	"GoNavi-Wails/internal/connection"
@@ -20,6 +21,11 @@ func normalizeRunConfig(config connection.ConnectionConfig, dbName string) conne
 	case "dameng":
 		// 达梦使用 schema 参数，沿用现有行为：dbName 表示 schema。
 		runConfig.Database = name
+	case "redis":
+		runConfig.Database = name
+		if idx, err := strconv.Atoi(name); err == nil && idx >= 0 && idx <= 15 {
+			runConfig.RedisDB = idx
+		}
 	default:
 		// oracle: dbName 表示 schema/owner，不能覆盖 config.Database（服务名）
 		// sqlite: 无需设置 Database

internal/app/methods_db.go

@@ -3,6 +3,7 @@ package app
 import (
 	"context"
 	"fmt"
+	"strconv"
 	"strings"
 	"time"
 
@@ -547,6 +548,24 @@ func ensureNonNilSlice[T any](items []T) []T {
 
 func (a *App) DBGetDatabases(config connection.ConnectionConfig) connection.QueryResult {
 	runConfig := normalizeRunConfig(config, "")
+	if strings.EqualFold(strings.TrimSpace(runConfig.Type), "redis") {
+		runConfig.Type = "redis"
+		client, err := a.getRedisClient(runConfig)
+		if err != nil {
+			logger.Error(err, "DBGetDatabases 获取 Redis 连接失败：%s", formatConnSummary(runConfig))
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+		dbs, err := client.GetDatabases()
+		if err != nil {
+			logger.Error(err, "DBGetDatabases 获取 Redis 库列表失败：%s", formatConnSummary(runConfig))
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+		resData := make([]map[string]string, 0, len(dbs))
+		for _, item := range dbs {
+			resData = append(resData, map[string]string{"Database": strconv.Itoa(item.Index)})
+		}
+		return connection.QueryResult{Success: true, Data: resData}
+	}
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {
 		logger.Error(err, "DBGetDatabases 获取连接失败：%s", formatConnSummary(runConfig))
@@ -579,6 +598,48 @@ func (a *App) DBGetDatabases(config connection.ConnectionConfig) connection.Quer
 
 func (a *App) DBGetTables(config connection.ConnectionConfig, dbName string) connection.QueryResult {
 	runConfig := normalizeRunConfig(config, dbName)
+	if strings.EqualFold(strings.TrimSpace(runConfig.Type), "redis") {
+		runConfig.Type = "redis"
+		client, err := a.getRedisClient(runConfig)
+		if err != nil {
+			logger.Error(err, "DBGetTables 获取 Redis 连接失败：%s", formatConnSummary(runConfig))
+			return connection.QueryResult{Success: false, Message: err.Error()}
+		}
+		cursor := uint64(0)
+		tables := make([]string, 0, 128)
+		seen := make(map[string]struct{}, 128)
+		for {
+			result, err := client.ScanKeys("*", cursor, 1000)
+			if err != nil {
+				logger.Error(err, "DBGetTables 扫描 Redis Key 失败：%s", formatConnSummary(runConfig))
+				return connection.QueryResult{Success: false, Message: err.Error()}
+			}
+			for _, item := range result.Keys {
+				key := strings.TrimSpace(item.Key)
+				if key == "" {
+					continue
+				}
+				if _, ok := seen[key]; ok {
+					continue
+				}
+				seen[key] = struct{}{}
+				tables = append(tables, key)
+			}
+			if strings.TrimSpace(result.Cursor) == "" || strings.TrimSpace(result.Cursor) == "0" {
+				break
+			}
+			next, err := strconv.ParseUint(strings.TrimSpace(result.Cursor), 10, 64)
+			if err != nil || next == cursor {
+				break
+			}
+			cursor = next
+		}
+		resData := make([]map[string]string, 0, len(tables))
+		for _, name := range tables {
+			resData = append(resData, map[string]string{"Table": name})
+		}
+		return connection.QueryResult{Success: true, Data: resData}
+	}
 
 	dbInst, err := a.getDatabase(runConfig)
 	if err != nil {

internal/connection/types.go

@@ -90,6 +90,7 @@ type IndexDefinition struct {
 	NonUnique  int    `json:"nonUnique"`
 	SeqInIndex int    `json:"seqInIndex"`
 	IndexType  string `json:"indexType"`
+	SubPart    int    `json:"subPart,omitempty"`
 }
 
 // ForeignKeyDefinition represents a foreign key

internal/db/clickhouse_impl.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net"
 	"net/url"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -678,3 +679,134 @@ func isClickHouseTruthy(value interface{}) bool {
 		return normalized == "1" || normalized == "true" || normalized == "yes" || normalized == "y"
 	}
 }
+
+func (c *ClickHouseDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+	if c.conn == nil {
+		return fmt.Errorf("connection not open")
+	}
+
+	database, table, err := c.resolveDatabaseAndTable(c.database, tableName)
+	if err != nil {
+		return err
+	}
+	qualifiedTable := fmt.Sprintf("%s.%s", quoteClickHouseIdentifier(database), quoteClickHouseIdentifier(table))
+
+	for _, pk := range changes.Deletes {
+		whereExpr := buildClickHouseWhereClause(pk)
+		if whereExpr == "" {
+			continue
+		}
+		query := fmt.Sprintf("ALTER TABLE %s DELETE WHERE %s", qualifiedTable, whereExpr)
+		if _, err := c.conn.Exec(query); err != nil {
+			return fmt.Errorf("delete error: %v; sql=%s", err, query)
+		}
+	}
+
+	for _, update := range changes.Updates {
+		setExpr := buildClickHouseAssignments(update.Values)
+		whereExpr := buildClickHouseWhereClause(update.Keys)
+		if setExpr == "" || whereExpr == "" {
+			continue
+		}
+		query := fmt.Sprintf("ALTER TABLE %s UPDATE %s WHERE %s", qualifiedTable, setExpr, whereExpr)
+		if _, err := c.conn.Exec(query); err != nil {
+			return fmt.Errorf("update error: %v; sql=%s", err, query)
+		}
+	}
+
+	for _, row := range changes.Inserts {
+		query, err := buildClickHouseInsertSQL(qualifiedTable, row)
+		if err != nil {
+			return err
+		}
+		if query == "" {
+			continue
+		}
+		if _, err := c.conn.Exec(query); err != nil {
+			return fmt.Errorf("insert error: %v; sql=%s", err, query)
+		}
+	}
+	return nil
+}
+
+func buildClickHouseInsertSQL(qualifiedTable string, row map[string]interface{}) (string, error) {
+	if len(row) == 0 {
+		return "", nil
+	}
+	cols := make([]string, 0, len(row))
+	for k := range row {
+		if strings.TrimSpace(k) == "" {
+			continue
+		}
+		cols = append(cols, k)
+	}
+	if len(cols) == 0 {
+		return "", nil
+	}
+	sort.Strings(cols)
+	quotedCols := make([]string, 0, len(cols))
+	values := make([]string, 0, len(cols))
+	for _, col := range cols {
+		quotedCols = append(quotedCols, quoteClickHouseIdentifier(col))
+		values = append(values, clickHouseLiteral(row[col]))
+	}
+	return fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s)", qualifiedTable, strings.Join(quotedCols, ", "), strings.Join(values, ", ")), nil
+}
+
+func buildClickHouseAssignments(values map[string]interface{}) string {
+	if len(values) == 0 {
+		return ""
+	}
+	cols := make([]string, 0, len(values))
+	for k := range values {
+		if strings.TrimSpace(k) == "" {
+			continue
+		}
+		cols = append(cols, k)
+	}
+	sort.Strings(cols)
+	parts := make([]string, 0, len(cols))
+	for _, col := range cols {
+		parts = append(parts, fmt.Sprintf("%s = %s", quoteClickHouseIdentifier(col), clickHouseLiteral(values[col])))
+	}
+	return strings.Join(parts, ", ")
+}
+
+func buildClickHouseWhereClause(keys map[string]interface{}) string {
+	if len(keys) == 0 {
+		return ""
+	}
+	cols := make([]string, 0, len(keys))
+	for k := range keys {
+		if strings.TrimSpace(k) == "" {
+			continue
+		}
+		cols = append(cols, k)
+	}
+	sort.Strings(cols)
+	parts := make([]string, 0, len(cols))
+	for _, col := range cols {
+		parts = append(parts, fmt.Sprintf("%s = %s", quoteClickHouseIdentifier(col), clickHouseLiteral(keys[col])))
+	}
+	return strings.Join(parts, " AND ")
+}
+
+func clickHouseLiteral(value interface{}) string {
+	switch val := value.(type) {
+	case nil:
+		return "NULL"
+	case bool:
+		if val {
+			return "1"
+		}
+		return "0"
+	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64:
+		return fmt.Sprintf("%v", val)
+	case time.Time:
+		return fmt.Sprintf("'%s'", val.Format("2006-01-02 15:04:05"))
+	case []byte:
+		return fmt.Sprintf("'%s'", strings.ReplaceAll(string(val), "'", "''"))
+	default:
+		return fmt.Sprintf("'%s'", strings.ReplaceAll(fmt.Sprintf("%v", val), "'", "''"))
+	}
+}

internal/db/mariadb_impl.go

@@ -250,12 +250,22 @@ func (m *MariaDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefini
 			}
 		}
 
+		subPart := 0
+		if val, ok := row["Sub_part"]; ok && val != nil {
+			if f, ok := val.(float64); ok {
+				subPart = int(f)
+			} else if i, ok := val.(int64); ok {
+				subPart = int(i)
+			}
+		}
+
 		idx := connection.IndexDefinition{
 			Name:       fmt.Sprintf("%v", row["Key_name"]),
 			ColumnName: fmt.Sprintf("%v", row["Column_name"]),
 			NonUnique:  nonUnique,
 			SeqInIndex: seq,
 			IndexType:  fmt.Sprintf("%v", row["Index_type"]),
+			SubPart:    subPart,
 		}
 		indexes = append(indexes, idx)
 	}
@@ -323,7 +333,7 @@ func (m *MariaDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 		var args []interface{}
 		for k, v := range pk {
 			wheres = append(wheres, fmt.Sprintf("`%s` = ?", k))
-			args = append(args, normalizeMySQLDateTimeValue(v))
+			args = append(args, normalizeMySQLComplexValue(normalizeMySQLDateTimeValue(v)))
 		}
 		if len(wheres) == 0 {
 			continue
@@ -341,7 +351,7 @@ func (m *MariaDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 
 		for k, v := range update.Values {
 			sets = append(sets, fmt.Sprintf("`%s` = ?", k))
-			args = append(args, normalizeMySQLDateTimeValue(v))
+			args = append(args, normalizeMySQLComplexValue(normalizeMySQLDateTimeValue(v)))
 		}
 
 		if len(sets) == 0 {
@@ -351,7 +361,7 @@ func (m *MariaDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 		var wheres []string
 		for k, v := range update.Keys {
 			wheres = append(wheres, fmt.Sprintf("`%s` = ?", k))
-			args = append(args, normalizeMySQLDateTimeValue(v))
+			args = append(args, normalizeMySQLComplexValue(normalizeMySQLDateTimeValue(v)))
 		}
 
 		if len(wheres) == 0 {
@@ -373,7 +383,7 @@ func (m *MariaDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 		for k, v := range row {
 			cols = append(cols, fmt.Sprintf("`%s`", k))
 			placeholders = append(placeholders, "?")
-			args = append(args, normalizeMySQLDateTimeValue(v))
+			args = append(args, normalizeMySQLComplexValue(normalizeMySQLDateTimeValue(v)))
 		}
 
 		if len(cols) == 0 {

internal/db/mysql_impl.go

@@ -3,6 +3,7 @@ package db
 import (
 	"context"
 	"database/sql"
+	"encoding/json"
 	"fmt"
 	"net/url"
 	"strconv"
@@ -441,12 +442,22 @@ func (m *MySQLDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefini
 			}
 		}
 
+		subPart := 0
+		if val, ok := row["Sub_part"]; ok && val != nil {
+			if f, ok := val.(float64); ok {
+				subPart = int(f)
+			} else if i, ok := val.(int64); ok {
+				subPart = int(i)
+			}
+		}
+
 		idx := connection.IndexDefinition{
 			Name:       fmt.Sprintf("%v", row["Key_name"]),
 			ColumnName: fmt.Sprintf("%v", row["Column_name"]),
 			NonUnique:  nonUnique,
 			SeqInIndex: seq,
 			IndexType:  fmt.Sprintf("%v", row["Index_type"]),
+			SubPart:    subPart,
 		}
 		indexes = append(indexes, idx)
 	}
@@ -606,6 +617,18 @@ func (m *MySQLDB) ApplyChanges(tableName string, changes connection.ChangeSet) e
 	return tx.Commit()
 }
 
+func normalizeMySQLComplexValue(value interface{}) interface{} {
+	switch v := value.(type) {
+	case map[string]interface{}, []interface{}:
+		if data, err := json.Marshal(v); err == nil {
+			return string(data)
+		}
+		return fmt.Sprintf("%v", value)
+	default:
+		return value
+	}
+}
+
 func normalizeMySQLDateTimeValue(value interface{}) interface{} {
 	text, ok := value.(string)
 	if !ok {
@@ -670,7 +693,7 @@ func (m *MySQLDB) loadColumnTypeMap(tableName string) map[string]string {
 func normalizeMySQLValueForInsert(columnName string, value interface{}, columnTypeMap map[string]string) (interface{}, bool) {
 	columnType := strings.ToLower(strings.TrimSpace(columnTypeMap[strings.ToLower(strings.TrimSpace(columnName))]))
 	if !isMySQLTemporalColumnType(columnType) {
-		return value, false
+		return normalizeMySQLComplexValue(value), false
 	}
 	text, ok := value.(string)
 	if ok && strings.TrimSpace(text) == "" {

internal/db/tdengine_applychanges_test.go

@@ -0,0 +1,168 @@
+//go:build gonavi_full_drivers || gonavi_tdengine_driver
+
+package db
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"fmt"
+	"strings"
+	"sync"
+	"testing"
+
+	"GoNavi-Wails/internal/connection"
+)
+
+const tdengineRecordingDriverName = "gonavi_tdengine_recording"
+
+var (
+	registerTDengineRecordingDriverOnce sync.Once
+	tdengineRecordingDriverMu           sync.Mutex
+	tdengineRecordingDriverSeq          int
+	tdengineRecordingDriverStates       = map[string]*tdengineRecordingState{}
+)
+
+type tdengineRecordingState struct {
+	mu      sync.Mutex
+	queries []string
+	execErr error
+}
+
+func (s *tdengineRecordingState) snapshotQueries() []string {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	queries := make([]string, len(s.queries))
+	copy(queries, s.queries)
+	return queries
+}
+
+type tdengineRecordingDriver struct{}
+
+func (tdengineRecordingDriver) Open(name string) (driver.Conn, error) {
+	tdengineRecordingDriverMu.Lock()
+	state := tdengineRecordingDriverStates[name]
+	tdengineRecordingDriverMu.Unlock()
+	if state == nil {
+		return nil, fmt.Errorf("recording state not found: %s", name)
+	}
+	return &tdengineRecordingConn{state: state}, nil
+}
+
+type tdengineRecordingConn struct {
+	state *tdengineRecordingState
+}
+
+func (c *tdengineRecordingConn) Prepare(query string) (driver.Stmt, error) {
+	return nil, fmt.Errorf("prepare not supported in tdengine recording driver: %s", query)
+}
+
+func (c *tdengineRecordingConn) Close() error { return nil }
+
+func (c *tdengineRecordingConn) Begin() (driver.Tx, error) {
+	return nil, fmt.Errorf("transactions not supported in tdengine recording driver")
+}
+
+func (c *tdengineRecordingConn) ExecContext(_ context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
+	if len(args) > 0 {
+		return nil, fmt.Errorf("unexpected exec args: %d", len(args))
+	}
+	c.state.mu.Lock()
+	defer c.state.mu.Unlock()
+	if c.state.execErr != nil {
+		return nil, c.state.execErr
+	}
+	c.state.queries = append(c.state.queries, query)
+	return driver.RowsAffected(1), nil
+}
+
+var _ driver.ExecerContext = (*tdengineRecordingConn)(nil)
+
+func openTDengineRecordingDB(t *testing.T) (*sql.DB, *tdengineRecordingState) {
+	t.Helper()
+	registerTDengineRecordingDriverOnce.Do(func() {
+		sql.Register(tdengineRecordingDriverName, tdengineRecordingDriver{})
+	})
+
+	tdengineRecordingDriverMu.Lock()
+	tdengineRecordingDriverSeq++
+	dsn := fmt.Sprintf("tdengine-recording-%d", tdengineRecordingDriverSeq)
+	state := &tdengineRecordingState{}
+	tdengineRecordingDriverStates[dsn] = state
+	tdengineRecordingDriverMu.Unlock()
+
+	dbConn, err := sql.Open(tdengineRecordingDriverName, dsn)
+	if err != nil {
+		t.Fatalf("打开 recording db 失败: %v", err)
+	}
+
+	t.Cleanup(func() {
+		_ = dbConn.Close()
+		tdengineRecordingDriverMu.Lock()
+		delete(tdengineRecordingDriverStates, dsn)
+		tdengineRecordingDriverMu.Unlock()
+	})
+
+	return dbConn, state
+}
+
+func TestTDengineApplyChanges_InsertsIntoQualifiedTable(t *testing.T) {
+	t.Parallel()
+
+	dbConn, state := openTDengineRecordingDB(t)
+	td := &TDengineDB{conn: dbConn}
+
+	changes := connection.ChangeSet{
+		Inserts: []map[string]interface{}{
+			{
+				"ts":      "2026-03-09 10:00:00",
+				"value":   12.5,
+				"device":  "sensor-a",
+				"enabled": true,
+			},
+		},
+	}
+
+	if err := td.ApplyChanges("analytics.metrics", changes); err != nil {
+		t.Fatalf("ApplyChanges 返回错误: %v", err)
+	}
+
+	queries := state.snapshotQueries()
+	if len(queries) != 1 {
+		t.Fatalf("期望执行 1 条 SQL，实际 %d 条: %#v", len(queries), queries)
+	}
+
+	want := "INSERT INTO `analytics`.`metrics` (`device`, `enabled`, `ts`, `value`) VALUES ('sensor-a', 1, '2026-03-09 10:00:00', 12.5)"
+	if queries[0] != want {
+		t.Fatalf("插入 SQL 不符合预期\nwant: %s\n got: %s", want, queries[0])
+	}
+}
+
+func TestTDengineApplyChanges_RejectsMixedUpdatesWithoutPartialWrite(t *testing.T) {
+	t.Parallel()
+
+	dbConn, state := openTDengineRecordingDB(t)
+	td := &TDengineDB{conn: dbConn}
+
+	changes := connection.ChangeSet{
+		Inserts: []map[string]interface{}{{
+			"ts":    "2026-03-09 10:00:00",
+			"value": 12.5,
+		}},
+		Updates: []connection.UpdateRow{{
+			Keys:   map[string]interface{}{"ts": "2026-03-09 10:00:00"},
+			Values: map[string]interface{}{"value": 18.8},
+		}},
+	}
+
+	err := td.ApplyChanges("metrics", changes)
+	if err == nil {
+		t.Fatalf("期望 mixed changes 被拒绝")
+	}
+	if !strings.Contains(err.Error(), "UPDATE/DELETE") {
+		t.Fatalf("错误信息未说明限制边界: %v", err)
+	}
+	if queries := state.snapshotQueries(); len(queries) != 0 {
+		t.Fatalf("期望拒绝 mixed changes 时不执行任何 SQL，实际=%#v", queries)
+	}
+}

internal/db/tdengine_impl.go

@@ -7,6 +7,7 @@ import (
 	"database/sql"
 	"fmt"
 	"net"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -362,6 +363,83 @@ func (t *TDengineDB) GetTriggers(dbName, tableName string) ([]connection.Trigger
 	return []connection.TriggerDefinition{}, nil
 }
 
+func (t *TDengineDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+	if t.conn == nil {
+		return fmt.Errorf("connection not open")
+	}
+	if strings.TrimSpace(tableName) == "" {
+		return fmt.Errorf("table name required")
+	}
+	if len(changes.Updates) > 0 || len(changes.Deletes) > 0 {
+		return fmt.Errorf("TDengine 目标端当前仅支持 INSERT 写入，暂不支持 UPDATE/DELETE 差异同步，请改用仅插入或全量覆盖模式")
+	}
+
+	qualifiedTable := quoteTDengineTable("", tableName)
+	for _, row := range changes.Inserts {
+		query, err := buildTDengineInsertSQL(qualifiedTable, row)
+		if err != nil {
+			return err
+		}
+		if query == "" {
+			continue
+		}
+		if _, err := t.conn.Exec(query); err != nil {
+			return fmt.Errorf("insert error: %v; sql=%s", err, query)
+		}
+	}
+	return nil
+}
+
+func buildTDengineInsertSQL(qualifiedTable string, row map[string]interface{}) (string, error) {
+	if strings.TrimSpace(qualifiedTable) == "" {
+		return "", fmt.Errorf("qualified table required")
+	}
+	if len(row) == 0 {
+		return "", nil
+	}
+
+	cols := make([]string, 0, len(row))
+	for key := range row {
+		if strings.TrimSpace(key) == "" {
+			continue
+		}
+		cols = append(cols, key)
+	}
+	if len(cols) == 0 {
+		return "", nil
+	}
+	sort.Strings(cols)
+
+	quotedCols := make([]string, 0, len(cols))
+	values := make([]string, 0, len(cols))
+	for _, col := range cols {
+		quotedCols = append(quotedCols, fmt.Sprintf("`%s`", escapeBacktickIdent(col)))
+		values = append(values, tdengineLiteral(row[col]))
+	}
+
+	return fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s)", qualifiedTable, strings.Join(quotedCols, ", "), strings.Join(values, ", ")), nil
+}
+
+func tdengineLiteral(value interface{}) string {
+	switch val := value.(type) {
+	case nil:
+		return "NULL"
+	case bool:
+		if val {
+			return "1"
+		}
+		return "0"
+	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64:
+		return fmt.Sprintf("%v", val)
+	case time.Time:
+		return fmt.Sprintf("'%s'", val.Format("2006-01-02 15:04:05"))
+	case []byte:
+		return fmt.Sprintf("'%s'", strings.ReplaceAll(string(val), "'", "''"))
+	default:
+		return fmt.Sprintf("'%s'", strings.ReplaceAll(fmt.Sprintf("%v", val), "'", "''"))
+	}
+}
+
 func getValueFromRow(row map[string]interface{}, keys ...string) (interface{}, bool) {
 	if len(row) == 0 {
 		return nil, false

internal/sync/analyze.go

@@ -1,22 +1,27 @@
 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"`
+	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"`
+	TargetTableExists  bool     `json:"targetTableExists,omitempty"`
+	PlannedAction      string   `json:"plannedAction,omitempty"`
+	Warnings           []string `json:"warnings,omitempty"`
+	UnsupportedObjects []string `json:"unsupportedObjects,omitempty"`
+	IndexesToCreate    int      `json:"indexesToCreate,omitempty"`
+	IndexesSkipped     int      `json:"indexesSkipped,omitempty"`
 }
 
 type SyncAnalyzeResult struct {
@@ -27,6 +32,12 @@ type SyncAnalyzeResult struct {
 
 func (s *SyncEngine) Analyze(config SyncConfig) SyncAnalyzeResult {
 	result := SyncAnalyzeResult{Success: true, Tables: []TableDiffSummary{}}
+	if isRedisToMongoKeyspacePair(config) {
+		return s.analyzeRedisToMongo(config)
+	}
+	if isMongoToRedisKeyspacePair(config) {
+		return s.analyzeMongoToRedis(config)
+	}
 
 	contentRaw := strings.ToLower(strings.TrimSpace(config.Content))
 	syncSchema := false
@@ -48,25 +59,23 @@ func (s *SyncEngine) Analyze(config SyncConfig) SyncAnalyzeResult {
 	totalTables := len(config.Tables)
 	s.progress(config.JobID, 0, totalTables, "", "差异分析开始")
 
-	sourceDB, err := db.NewDatabase(config.SourceConfig.Type)
+	sourceDB, err := newSyncDatabase(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)
+	targetDB, err := newSyncDatabase(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()}
@@ -88,51 +97,76 @@ func (s *SyncEngine) Analyze(config SyncConfig) SyncAnalyzeResult {
 				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)
+			plan, cols, _, err := buildSchemaMigrationPlan(config, tableName, sourceDB, targetDB)
 			if err != nil {
-				summary.Message = "获取源表字段失败: " + err.Error()
+				summary.Message = err.Error()
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+			summary.TargetTableExists = plan.TargetTableExists
+			summary.PlannedAction = plan.PlannedAction
+			summary.Warnings = append(summary.Warnings, plan.Warnings...)
+			summary.UnsupportedObjects = append(summary.UnsupportedObjects, plan.UnsupportedObjects...)
+			summary.IndexesToCreate = plan.IndexesToCreate
+			summary.IndexesSkipped = plan.IndexesSkipped
+
+			if !plan.TargetTableExists && !plan.AutoCreate {
+				summary.Message = firstNonEmpty(plan.PlannedAction, "目标表不存在，无法执行同步")
 				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"
+				summary.Message = firstNonEmpty(plan.PlannedAction, "仅同步结构，未执行数据差异分析")
 				result.Tables = append(result.Tables, summary)
 				return
 			}
 
+			tableMode := normalizeSyncMode(config.Mode)
 			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)))
+			sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.SourceConfig.Type, plan.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 !plan.TargetTableExists && plan.AutoCreate {
+				summary.CanSync = true
+				summary.Inserts = len(sourceRows)
+				summary.Message = firstNonEmpty(plan.PlannedAction, "目标表不存在，执行时将自动建表并导入全部源数据")
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+
+			if tableMode != "insert_update" {
+				summary.CanSync = true
+				summary.Inserts = len(sourceRows)
+				summary.Message = firstNonEmpty(plan.PlannedAction, "当前模式无需差异对比，将按源表数据执行导入")
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+
+			if len(pkCols) == 0 {
+				summary.Message = "无主键，不支持差异对比同步；如需直接导入请使用仅插入或全量覆盖模式"
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+			if len(pkCols) > 1 {
+				summary.Message = fmt.Sprintf("复合主键（%s），暂不支持差异对比同步", strings.Join(pkCols, ","))
+				result.Tables = append(result.Tables, summary)
+				return
+			}
+			summary.PKColumn = pkCols[0]
+
+			targetRows, _, err := targetDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.TargetConfig.Type, plan.TargetQueryTable)))
 			if err != nil {
 				summary.Message = "读取目标表失败: " + err.Error()
 				result.Tables = append(result.Tables, summary)
@@ -188,6 +222,9 @@ func (s *SyncEngine) Analyze(config SyncConfig) SyncAnalyzeResult {
 			}
 
 			summary.CanSync = true
+			if strings.TrimSpace(summary.Message) == "" {
+				summary.Message = firstNonEmpty(plan.PlannedAction, "差异分析完成")
+			}
 			result.Tables = append(result.Tables, summary)
 		}()
 	}
@@ -196,3 +233,12 @@ func (s *SyncEngine) Analyze(config SyncConfig) SyncAnalyzeResult {
 	result.Message = fmt.Sprintf("已完成 %d 张表的差异分析", len(result.Tables))
 	return result
 }
+
+func firstNonEmpty(values ...string) string {
+	for _, value := range values {
+		if strings.TrimSpace(value) != "" {
+			return value
+		}
+	}
+	return ""
+}

internal/sync/migration_clickhouse.go

@@ -0,0 +1,741 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+func buildMySQLToClickHousePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(config.SourceConfig.Type, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(config.TargetConfig.Type, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if config.AutoAddColumns {
+			addSQL, addWarnings := buildMySQLToClickHouseAddColumnSQL(plan.TargetQueryTable, sourceCols, targetCols)
+			plan.PreDataSQL = append(plan.PreDataSQL, addSQL...)
+			plan.Warnings = append(plan.Warnings, addWarnings...)
+			if len(addSQL) > 0 {
+				plan.PlannedAction = fmt.Sprintf("补齐缺失字段(%d)后导入", len(addSQL))
+			}
+		}
+		plan.Warnings = append(plan.Warnings, "ClickHouse 目标端建议优先使用仅插入或全量覆盖；更新/删除语义与传统关系型存在差异")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, warnings, unsupported := buildMySQLToClickHouseCreateTableSQL(plan.TargetQueryTable, sourceCols)
+		plan.CreateTableSQL = createSQL
+		plan.Warnings = append(plan.Warnings, warnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func buildPGLikeToClickHousePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	sourceType := resolveMigrationDBType(config.SourceConfig)
+	targetType := resolveMigrationDBType(config.TargetConfig)
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(sourceType, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(sourceType, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(targetType, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if config.AutoAddColumns {
+			addSQL, addWarnings := buildPGLikeToClickHouseAddColumnSQL(plan.TargetQueryTable, sourceCols, targetCols)
+			plan.PreDataSQL = append(plan.PreDataSQL, addSQL...)
+			plan.Warnings = append(plan.Warnings, addWarnings...)
+			if len(addSQL) > 0 {
+				plan.PlannedAction = fmt.Sprintf("补齐缺失字段(%d)后导入", len(addSQL))
+			}
+		}
+		plan.Warnings = append(plan.Warnings, "ClickHouse 目标端建议优先使用仅插入或全量覆盖；更新/删除语义与传统关系型存在差异")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, warnings, unsupported := buildPGLikeToClickHouseCreateTableSQL(plan.TargetQueryTable, sourceCols)
+		plan.CreateTableSQL = createSQL
+		plan.Warnings = append(plan.Warnings, warnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func buildClickHouseToMySQLPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(config.SourceConfig.Type, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(config.TargetConfig.Type, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if config.AutoAddColumns {
+			addSQL, addWarnings := buildClickHouseToMySQLAddColumnSQL(plan.TargetQueryTable, sourceCols, targetCols)
+			plan.PreDataSQL = append(plan.PreDataSQL, addSQL...)
+			plan.Warnings = append(plan.Warnings, addWarnings...)
+			if len(addSQL) > 0 {
+				plan.PlannedAction = fmt.Sprintf("补齐缺失字段(%d)后导入", len(addSQL))
+			}
+		}
+		plan.Warnings = append(plan.Warnings, "ClickHouse 源端索引/约束元数据有限，反向迁移将以字段和数据为主")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, warnings := buildClickHouseToMySQLCreateTableSQL(plan.TargetQueryTable, sourceCols)
+		plan.CreateTableSQL = createSQL
+		plan.Warnings = append(plan.Warnings, warnings...)
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func buildClickHouseToPGLikePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	sourceType := resolveMigrationDBType(config.SourceConfig)
+	targetType := resolveMigrationDBType(config.TargetConfig)
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(sourceType, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(sourceType, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(targetType, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if config.AutoAddColumns {
+			addSQL, addWarnings := buildClickHouseToPGLikeAddColumnSQL(targetType, plan.TargetQueryTable, sourceCols, targetCols)
+			plan.PreDataSQL = append(plan.PreDataSQL, addSQL...)
+			plan.Warnings = append(plan.Warnings, addWarnings...)
+			if len(addSQL) > 0 {
+				plan.PlannedAction = fmt.Sprintf("补齐缺失字段(%d)后导入", len(addSQL))
+			}
+		}
+		plan.Warnings = append(plan.Warnings, "ClickHouse 源端索引/约束元数据有限，反向迁移将以字段和数据为主")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, warnings, unsupported := buildClickHouseToPGLikeCreateTableSQL(targetType, plan.TargetQueryTable, sourceCols)
+		plan.CreateTableSQL = createSQL
+		plan.Warnings = append(plan.Warnings, warnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func buildPGLikeToClickHouseAddColumnSQL(targetQueryTable string, sourceCols, targetCols []connection.ColumnDefinition) ([]string, []string) {
+	targetSet := make(map[string]struct{}, len(targetCols))
+	for _, col := range targetCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		targetSet[key] = struct{}{}
+	}
+	var sqlList []string
+	var warnings []string
+	for _, col := range sourceCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		if _, ok := targetSet[key]; ok {
+			continue
+		}
+		colType, mapWarnings := mapPGLikeColumnToClickHouse(col)
+		warnings = append(warnings, mapWarnings...)
+		sqlList = append(sqlList, fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s",
+			quoteQualifiedIdentByType("clickhouse", targetQueryTable),
+			quoteIdentByType("clickhouse", col.Name),
+			colType,
+		))
+	}
+	return sqlList, dedupeStrings(warnings)
+}
+
+func buildMySQLToClickHouseAddColumnSQL(targetQueryTable string, sourceCols, targetCols []connection.ColumnDefinition) ([]string, []string) {
+	targetSet := make(map[string]struct{}, len(targetCols))
+	for _, col := range targetCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		targetSet[key] = struct{}{}
+	}
+	var sqlList []string
+	var warnings []string
+	for _, col := range sourceCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		if _, ok := targetSet[key]; ok {
+			continue
+		}
+		colType, mapWarnings := mapMySQLColumnToClickHouse(col)
+		warnings = append(warnings, mapWarnings...)
+		sqlList = append(sqlList, fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s",
+			quoteQualifiedIdentByType("clickhouse", targetQueryTable),
+			quoteIdentByType("clickhouse", col.Name),
+			colType,
+		))
+	}
+	return sqlList, dedupeStrings(warnings)
+}
+
+func buildClickHouseToPGLikeAddColumnSQL(targetType string, targetQueryTable string, sourceCols, targetCols []connection.ColumnDefinition) ([]string, []string) {
+	targetSet := make(map[string]struct{}, len(targetCols))
+	for _, col := range targetCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		targetSet[key] = struct{}{}
+	}
+	var sqlList []string
+	var warnings []string
+	for _, col := range sourceCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		if _, ok := targetSet[key]; ok {
+			continue
+		}
+		colType, mapWarnings := mapClickHouseColumnToPGLike(col)
+		warnings = append(warnings, mapWarnings...)
+		sqlList = append(sqlList, fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+			quoteQualifiedIdentByType(targetType, targetQueryTable),
+			quoteIdentByType(targetType, col.Name),
+			colType,
+		))
+	}
+	return sqlList, dedupeStrings(warnings)
+}
+
+func buildClickHouseToMySQLAddColumnSQL(targetQueryTable string, sourceCols, targetCols []connection.ColumnDefinition) ([]string, []string) {
+	targetSet := make(map[string]struct{}, len(targetCols))
+	for _, col := range targetCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		targetSet[key] = struct{}{}
+	}
+	var sqlList []string
+	var warnings []string
+	for _, col := range sourceCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		if _, ok := targetSet[key]; ok {
+			continue
+		}
+		colType, mapWarnings := mapClickHouseColumnToMySQL(col)
+		warnings = append(warnings, mapWarnings...)
+		sqlList = append(sqlList, fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+			quoteQualifiedIdentByType("mysql", targetQueryTable),
+			quoteIdentByType("mysql", col.Name),
+			colType,
+		))
+	}
+	return sqlList, dedupeStrings(warnings)
+}
+
+func buildPGLikeToClickHouseCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition) (string, []string, []string) {
+	columnDefs := make([]string, 0, len(sourceCols))
+	warnings := make([]string, 0)
+	unsupported := make([]string, 0)
+	orderByCols := make([]string, 0)
+	for _, col := range sourceCols {
+		def, colWarnings := buildPGLikeToClickHouseColumnDefinition(col)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("clickhouse", col.Name), def))
+		if col.Key == "PRI" || col.Key == "PK" {
+			orderByCols = append(orderByCols, quoteIdentByType("clickhouse", col.Name))
+		}
+	}
+	orderExpr := "tuple()"
+	if len(orderByCols) > 0 {
+		orderExpr = "(" + strings.Join(orderByCols, ", ") + ")"
+	} else {
+		warnings = append(warnings, "源表未识别到主键，ClickHouse 将使用 ORDER BY tuple() 建表，后续查询性能可能受影响")
+	}
+	warnings = append(warnings, "ClickHouse 不保留关系型外键/唯一约束语义，将仅迁移字段与数据")
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n) ENGINE = MergeTree() ORDER BY %s", quoteQualifiedIdentByType("clickhouse", targetQueryTable), strings.Join(columnDefs, ",\n  "), orderExpr)
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildMySQLToClickHouseCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition) (string, []string, []string) {
+	columnDefs := make([]string, 0, len(sourceCols))
+	warnings := make([]string, 0)
+	unsupported := make([]string, 0)
+	orderByCols := make([]string, 0)
+	for _, col := range sourceCols {
+		def, colWarnings := buildMySQLToClickHouseColumnDefinition(col)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("clickhouse", col.Name), def))
+		if col.Key == "PRI" || col.Key == "PK" {
+			orderByCols = append(orderByCols, quoteIdentByType("clickhouse", col.Name))
+		}
+	}
+	orderExpr := "tuple()"
+	if len(orderByCols) > 0 {
+		orderExpr = "(" + strings.Join(orderByCols, ", ") + ")"
+	} else {
+		warnings = append(warnings, "源表未识别到主键，ClickHouse 将使用 ORDER BY tuple() 建表，后续查询性能可能受影响")
+	}
+	warnings = append(warnings, "ClickHouse 不保留关系型外键/唯一约束语义，将仅迁移字段与数据")
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n) ENGINE = MergeTree() ORDER BY %s", quoteQualifiedIdentByType("clickhouse", targetQueryTable), strings.Join(columnDefs, ",\n  "), orderExpr)
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildClickHouseToPGLikeCreateTableSQL(targetType string, targetQueryTable string, sourceCols []connection.ColumnDefinition) (string, []string, []string) {
+	columnDefs := make([]string, 0, len(sourceCols)+1)
+	warnings := make([]string, 0)
+	unsupported := []string{"ClickHouse ORDER BY/PARTITION/TTL/Projection/物化视图 语义当前不会自动迁移到 PG-like"}
+	pkCols := make([]string, 0)
+	for _, col := range sourceCols {
+		def, colWarnings := buildClickHouseToPGLikeColumnDefinition(col)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType(targetType, col.Name), def))
+		if col.Key == "PRI" || col.Key == "PK" {
+			pkCols = append(pkCols, quoteIdentByType(targetType, col.Name))
+		}
+	}
+	if len(pkCols) > 0 {
+		columnDefs = append(columnDefs, fmt.Sprintf("PRIMARY KEY (%s)", strings.Join(pkCols, ", ")))
+	} else {
+		warnings = append(warnings, "ClickHouse 源端未返回主键信息，目标 PG-like 表将不自动创建主键")
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType(targetType, targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildClickHouseToMySQLCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition) (string, []string) {
+	columnDefs := make([]string, 0, len(sourceCols)+1)
+	warnings := make([]string, 0)
+	pkCols := make([]string, 0)
+	for _, col := range sourceCols {
+		def, colWarnings := buildClickHouseToMySQLColumnDefinition(col)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("mysql", col.Name), def))
+		if col.Key == "PRI" || col.Key == "PK" {
+			pkCols = append(pkCols, quoteIdentByType("mysql", col.Name))
+		}
+	}
+	if len(pkCols) > 0 {
+		columnDefs = append(columnDefs, fmt.Sprintf("PRIMARY KEY (%s)", strings.Join(pkCols, ", ")))
+	} else {
+		warnings = append(warnings, "ClickHouse 源端未返回主键信息，目标 MySQL 表将不自动创建主键")
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType("mysql", targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings)
+}
+
+func buildPGLikeToClickHouseColumnDefinition(col connection.ColumnDefinition) (string, []string) {
+	targetType, warnings := mapPGLikeColumnToClickHouse(col)
+	parts := []string{targetType}
+	return strings.Join(parts, " "), dedupeStrings(warnings)
+}
+
+func buildMySQLToClickHouseColumnDefinition(col connection.ColumnDefinition) (string, []string) {
+	targetType, warnings := mapMySQLColumnToClickHouse(col)
+	parts := []string{targetType}
+	if strings.EqualFold(strings.TrimSpace(col.Nullable), "NO") && !strings.HasPrefix(strings.ToLower(targetType), "nullable(") {
+		return strings.Join(parts, " "), dedupeStrings(warnings)
+	}
+	return strings.Join(parts, " "), dedupeStrings(warnings)
+}
+
+func buildClickHouseToPGLikeColumnDefinition(col connection.ColumnDefinition) (string, []string) {
+	targetType, warnings := mapClickHouseColumnToPGLike(col)
+	parts := []string{targetType}
+	if strings.EqualFold(strings.TrimSpace(col.Nullable), "NO") {
+		parts = append(parts, "NOT NULL")
+	}
+	return strings.Join(parts, " "), dedupeStrings(warnings)
+}
+
+func buildClickHouseToMySQLColumnDefinition(col connection.ColumnDefinition) (string, []string) {
+	targetType, warnings := mapClickHouseColumnToMySQL(col)
+	parts := []string{targetType}
+	if strings.EqualFold(strings.TrimSpace(col.Nullable), "NO") {
+		parts = append(parts, "NOT NULL")
+	}
+	return strings.Join(parts, " "), dedupeStrings(warnings)
+}
+
+func mapPGLikeColumnToClickHouse(col connection.ColumnDefinition) (string, []string) {
+	raw := strings.ToLower(strings.TrimSpace(col.Type))
+	warnings := make([]string, 0)
+	if raw == "" {
+		return "String", []string{fmt.Sprintf("字段 %s 类型为空，已降级为 String", col.Name)}
+	}
+	baseType := "String"
+	switch {
+	case raw == "boolean" || strings.HasPrefix(raw, "bool"):
+		baseType = "UInt8"
+	case raw == "smallint":
+		baseType = "Int16"
+	case raw == "integer" || raw == "int4":
+		baseType = "Int32"
+	case raw == "bigint" || raw == "int8":
+		baseType = "Int64"
+	case strings.HasPrefix(raw, "numeric"), strings.HasPrefix(raw, "decimal"):
+		baseType = replaceTypeBase(raw, []string{"numeric", "decimal"}, "Decimal")
+	case raw == "real" || raw == "float4":
+		baseType = "Float32"
+	case raw == "double precision" || raw == "float8":
+		baseType = "Float64"
+	case raw == "date":
+		baseType = "Date"
+	case strings.HasPrefix(raw, "timestamp") || strings.Contains(raw, "without time zone") || strings.Contains(raw, "with time zone"):
+		baseType = "DateTime"
+	case strings.HasPrefix(raw, "time"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 String", col.Name, col.Type))
+		baseType = "String"
+	case strings.HasPrefix(raw, "character varying"), strings.HasPrefix(raw, "varchar("), strings.HasPrefix(raw, "character("), strings.HasPrefix(raw, "char("), raw == "character", raw == "text", raw == "uuid":
+		baseType = "String"
+	case raw == "json" || raw == "jsonb" || raw == "bytea":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 String", col.Name, col.Type))
+		baseType = "String"
+	case strings.HasSuffix(raw, "[]") || strings.HasPrefix(raw, "array"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 String", col.Name, col.Type))
+		baseType = "String"
+	case raw == "user-defined":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 为用户自定义类型，已降级为 String", col.Name))
+		baseType = "String"
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门映射，已降级为 String", col.Name, col.Type))
+		baseType = "String"
+	}
+	if strings.EqualFold(strings.TrimSpace(col.Nullable), "YES") && !strings.HasPrefix(strings.ToLower(baseType), "nullable(") {
+		baseType = fmt.Sprintf("Nullable(%s)", baseType)
+	}
+	if strings.Contains(strings.ToLower(strings.TrimSpace(col.Extra)), "identity") || strings.Contains(strings.ToLower(strings.TrimSpace(col.Extra)), "auto_increment") {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 的 identity/自增语义在 ClickHouse 中不保留", col.Name))
+	}
+	return baseType, dedupeStrings(warnings)
+}
+
+func mapMySQLColumnToClickHouse(col connection.ColumnDefinition) (string, []string) {
+	raw := strings.ToLower(strings.TrimSpace(col.Type))
+	warnings := make([]string, 0)
+	if raw == "" {
+		return "String", []string{fmt.Sprintf("字段 %s 类型为空，已降级为 String", col.Name)}
+	}
+	unsigned := strings.Contains(raw, "unsigned")
+	clean := strings.ReplaceAll(raw, " unsigned", "")
+	clean = strings.ReplaceAll(clean, " zerofill", "")
+	baseType := "String"
+	switch {
+	case strings.HasPrefix(clean, "tinyint(1)"):
+		baseType = "UInt8"
+	case strings.HasPrefix(clean, "tinyint"):
+		if unsigned {
+			baseType = "UInt8"
+		} else {
+			baseType = "Int8"
+		}
+	case strings.HasPrefix(clean, "smallint"):
+		if unsigned {
+			baseType = "UInt16"
+		} else {
+			baseType = "Int16"
+		}
+	case strings.HasPrefix(clean, "mediumint"), strings.HasPrefix(clean, "int"), strings.HasPrefix(clean, "integer"):
+		if unsigned {
+			baseType = "UInt32"
+		} else {
+			baseType = "Int32"
+		}
+	case strings.HasPrefix(clean, "bigint"):
+		if unsigned {
+			baseType = "UInt64"
+		} else {
+			baseType = "Int64"
+		}
+	case strings.HasPrefix(clean, "decimal"), strings.HasPrefix(clean, "numeric"):
+		baseType = replaceTypeBase(strings.Title(clean), []string{"Decimal", "Numeric"}, "Decimal")
+	case strings.HasPrefix(clean, "float"):
+		baseType = "Float32"
+	case strings.HasPrefix(clean, "double"):
+		baseType = "Float64"
+	case strings.HasPrefix(clean, "date"):
+		baseType = "Date"
+	case strings.HasPrefix(clean, "datetime"), strings.HasPrefix(clean, "timestamp"):
+		baseType = "DateTime"
+	case strings.HasPrefix(clean, "time"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 time 已降级为 String", col.Name))
+		baseType = "String"
+	case strings.HasPrefix(clean, "json"), strings.HasPrefix(clean, "enum"), strings.HasPrefix(clean, "set"), strings.HasPrefix(clean, "char"), strings.HasPrefix(clean, "varchar"), strings.Contains(clean, "text"):
+		baseType = "String"
+	case strings.Contains(clean, "blob"), strings.Contains(clean, "binary"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 二进制类型已降级为 String", col.Name))
+		baseType = "String"
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门映射，已降级为 String", col.Name, col.Type))
+		baseType = "String"
+	}
+	if strings.EqualFold(strings.TrimSpace(col.Nullable), "YES") && !strings.HasPrefix(strings.ToLower(baseType), "nullable(") {
+		baseType = fmt.Sprintf("Nullable(%s)", baseType)
+	}
+	if strings.Contains(strings.ToLower(strings.TrimSpace(col.Extra)), "auto_increment") {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 的 AUTO_INCREMENT 在 ClickHouse 中不保留自增语义", col.Name))
+	}
+	return baseType, dedupeStrings(warnings)
+}
+
+var clickHouseDecimalPattern = regexp.MustCompile(`^(decimal|numeric)\((\d+)\s*,\s*(\d+)\)$`)
+var clickHouseStringArgsPattern = regexp.MustCompile(`^fixedstring\((\d+)\)$`)
+
+func mapClickHouseColumnToPGLike(col connection.ColumnDefinition) (string, []string) {
+	raw := strings.TrimSpace(col.Type)
+	lower := strings.ToLower(raw)
+	warnings := make([]string, 0)
+	if strings.HasPrefix(lower, "nullable(") && strings.HasSuffix(lower, ")") {
+		raw = strings.TrimSpace(raw[len("Nullable(") : len(raw)-1])
+		lower = strings.ToLower(raw)
+	}
+	for {
+		if strings.HasPrefix(lower, "lowcardinality(") && strings.HasSuffix(lower, ")") {
+			raw = strings.TrimSpace(raw[len("LowCardinality(") : len(raw)-1])
+			lower = strings.ToLower(raw)
+			continue
+		}
+		break
+	}
+	switch {
+	case lower == "bool" || lower == "boolean":
+		return "boolean", warnings
+	case lower == "int8":
+		return "smallint", warnings
+	case lower == "uint8":
+		return "smallint", warnings
+	case lower == "int16":
+		return "smallint", warnings
+	case lower == "uint16":
+		return "integer", warnings
+	case lower == "int32":
+		return "integer", warnings
+	case lower == "uint32":
+		return "bigint", warnings
+	case lower == "int64":
+		return "bigint", warnings
+	case lower == "uint64":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已映射为 numeric(20,0) 以避免无符号溢出", col.Name, col.Type))
+		return "numeric(20,0)", warnings
+	case lower == "float32":
+		return "real", warnings
+	case lower == "float64":
+		return "double precision", warnings
+	case lower == "date":
+		return "date", warnings
+	case strings.HasPrefix(lower, "datetime"):
+		return "timestamp", warnings
+	case lower == "string":
+		return "text", warnings
+	case lower == "uuid":
+		return "uuid", warnings
+	case lower == "json", strings.HasPrefix(lower, "map("), strings.HasPrefix(lower, "array("), strings.HasPrefix(lower, "tuple("), strings.HasPrefix(lower, "nested("):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 jsonb", col.Name, col.Type))
+		return "jsonb", warnings
+	case strings.HasPrefix(lower, "enum8("), strings.HasPrefix(lower, "enum16("):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 枚举类型 %s 已降级为 varchar(255)", col.Name, col.Type))
+		return "varchar(255)", warnings
+	case clickHouseDecimalPattern.MatchString(lower):
+		parts := clickHouseDecimalPattern.FindStringSubmatch(lower)
+		return fmt.Sprintf("numeric(%s,%s)", parts[2], parts[3]), warnings
+	case clickHouseStringArgsPattern.MatchString(lower):
+		parts := clickHouseStringArgsPattern.FindStringSubmatch(lower)
+		return fmt.Sprintf("varchar(%s)", parts[1]), warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门 PG-like 映射，已降级为 text", col.Name, col.Type))
+		return "text", warnings
+	}
+}
+
+func mapClickHouseColumnToMySQL(col connection.ColumnDefinition) (string, []string) {
+	raw := strings.TrimSpace(col.Type)
+	lower := strings.ToLower(raw)
+	warnings := make([]string, 0)
+	nullable := false
+	if strings.HasPrefix(lower, "nullable(") && strings.HasSuffix(lower, ")") {
+		nullable = true
+		raw = strings.TrimSpace(raw[len("Nullable(") : len(raw)-1])
+		lower = strings.ToLower(raw)
+	}
+	for {
+		if strings.HasPrefix(lower, "lowcardinality(") && strings.HasSuffix(lower, ")") {
+			raw = strings.TrimSpace(raw[len("LowCardinality(") : len(raw)-1])
+			lower = strings.ToLower(raw)
+			continue
+		}
+		break
+	}
+	_ = nullable
+	switch {
+	case lower == "bool" || lower == "boolean" || lower == "uint8":
+		return "tinyint(1)", warnings
+	case lower == "int8":
+		return "tinyint", warnings
+	case lower == "uint16":
+		return "smallint unsigned", warnings
+	case lower == "int16":
+		return "smallint", warnings
+	case lower == "uint32":
+		return "int unsigned", warnings
+	case lower == "int32":
+		return "int", warnings
+	case lower == "uint64":
+		return "bigint unsigned", warnings
+	case lower == "int64":
+		return "bigint", warnings
+	case lower == "float32":
+		return "float", warnings
+	case lower == "float64":
+		return "double", warnings
+	case lower == "date":
+		return "date", warnings
+	case strings.HasPrefix(lower, "datetime"):
+		return "datetime", warnings
+	case lower == "string":
+		return "text", warnings
+	case lower == "uuid":
+		return "char(36)", warnings
+	case lower == "json", strings.HasPrefix(lower, "map("), strings.HasPrefix(lower, "array("), strings.HasPrefix(lower, "tuple("), strings.HasPrefix(lower, "nested("):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 json", col.Name, col.Type))
+		return "json", warnings
+	case clickHouseDecimalPattern.MatchString(lower):
+		parts := clickHouseDecimalPattern.FindStringSubmatch(lower)
+		return fmt.Sprintf("decimal(%s,%s)", parts[2], parts[3]), warnings
+	case clickHouseStringArgsPattern.MatchString(lower):
+		parts := clickHouseStringArgsPattern.FindStringSubmatch(lower)
+		return fmt.Sprintf("varchar(%s)", parts[1]), warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门映射，已降级为 text", col.Name, col.Type))
+		return "text", warnings
+	}
+}

internal/sync/migration_kernel_router.go

@@ -0,0 +1,379 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	"fmt"
+	"strings"
+)
+
+type genericLegacyPlanner struct{}
+
+type mysqlToPGLikePlanner struct{}
+
+type mysqlToClickHousePlanner struct{}
+
+type pgLikeToClickHousePlanner struct{}
+
+type clickHouseToMySQLPlanner struct{}
+
+type clickHouseToPGLikePlanner struct{}
+
+type mysqlToMongoPlanner struct{}
+
+type pgLikeToMongoPlanner struct{}
+
+type clickHouseToMongoPlanner struct{}
+
+type tdengineToMongoPlanner struct{}
+
+type mongoToMySQLPlanner struct{}
+
+type mongoToPGLikePlanner struct{}
+
+type pgLikeToMySQLPlanner struct{}
+
+type tdengineToMySQLPlanner struct{}
+
+type tdengineToPGLikePlanner struct{}
+
+type mongoToRelationalPlanner struct{}
+
+func buildSchemaMigrationPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	ctx := MigrationBuildContext{
+		Config:    config,
+		TableName: tableName,
+		SourceDB:  sourceDB,
+		TargetDB:  targetDB,
+	}
+	planner := resolveMigrationPlanner(ctx)
+	if planner == nil {
+		return buildSchemaMigrationPlanLegacy(config, tableName, sourceDB, targetDB)
+	}
+	return planner.BuildPlan(ctx)
+}
+
+func resolveMigrationPlanner(ctx MigrationBuildContext) MigrationPlanner {
+	planners := []MigrationPlanner{
+		mysqlToPGLikePlanner{},
+		mySQLLikeToTDenginePlanner{},
+		pgLikeToTDenginePlanner{},
+		clickHouseToTDenginePlanner{},
+		tdengineToTDenginePlanner{},
+		tdengineToPGLikePlanner{},
+		tdengineToMySQLPlanner{},
+		mysqlToClickHousePlanner{},
+		pgLikeToClickHousePlanner{},
+		clickHouseToMySQLPlanner{},
+		clickHouseToPGLikePlanner{},
+		mysqlToMongoPlanner{},
+		pgLikeToMongoPlanner{},
+		clickHouseToMongoPlanner{},
+		tdengineToMongoPlanner{},
+		mongoToMySQLPlanner{},
+		mongoToPGLikePlanner{},
+		pgLikeToMySQLPlanner{},
+		mongoToRelationalPlanner{},
+		genericLegacyPlanner{},
+	}
+	bestLevel := MigrationSupportLevelUnsupported
+	var bestPlanner MigrationPlanner
+	for _, planner := range planners {
+		level := planner.SupportLevel(ctx)
+		if migrationSupportRank(level) > migrationSupportRank(bestLevel) {
+			bestLevel = level
+			bestPlanner = planner
+		}
+	}
+	return bestPlanner
+}
+
+func migrationSupportRank(level MigrationSupportLevel) int {
+	switch level {
+	case MigrationSupportLevelFull:
+		return 4
+	case MigrationSupportLevelPlanned:
+		return 3
+	case MigrationSupportLevelPartial:
+		return 2
+	default:
+		return 1
+	}
+}
+
+func isMySQLLikeType(dbType string) bool {
+	return isMySQLLikeWritableTargetType(dbType)
+}
+
+func classifyMigrationDataModel(dbType string) MigrationDataModel {
+	switch normalizeMigrationDBType(dbType) {
+	case "mysql", "mariadb", "postgres", "kingbase", "highgo", "vastbase", "oracle", "sqlserver", "dameng", "sqlite", "duckdb":
+		return MigrationDataModelRelational
+	case "mongodb":
+		return MigrationDataModelDocument
+	case "clickhouse", "diros", "sphinx":
+		return MigrationDataModelColumnar
+	case "tdengine":
+		return MigrationDataModelTimeSeries
+	case "redis":
+		return MigrationDataModelKeyValue
+	default:
+		return MigrationDataModelCustom
+	}
+}
+
+func (genericLegacyPlanner) Name() string { return "generic-legacy-planner" }
+
+func (genericLegacyPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	_ = ctx
+	return MigrationSupportLevelPartial
+}
+
+func (genericLegacyPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildSchemaMigrationPlanLegacy(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (mysqlToPGLikePlanner) Name() string { return "mysql-pglike-planner" }
+
+func (mysqlToPGLikePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isMySQLLikeSourceType(sourceType) && isPGLikeTarget(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (mysqlToPGLikePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildMySQLToPGLikePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (tdengineToMySQLPlanner) Name() string { return "tdengine-mysql-planner" }
+
+func (tdengineToMySQLPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "tdengine" && isMySQLLikeWritableTargetType(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (tdengineToMySQLPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTDengineToMySQLPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (tdengineToPGLikePlanner) Name() string { return "tdengine-pglike-planner" }
+
+func (tdengineToPGLikePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "tdengine" && isPGLikeTarget(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (tdengineToPGLikePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTDengineToPGLikePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (mysqlToClickHousePlanner) Name() string { return "mysql-clickhouse-planner" }
+
+func (mysqlToClickHousePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isMySQLCoreType(sourceType) && targetType == "clickhouse" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (mysqlToClickHousePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildMySQLToClickHousePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (pgLikeToClickHousePlanner) Name() string { return "pglike-clickhouse-planner" }
+
+func (pgLikeToClickHousePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isPGLikeSource(sourceType) && targetType == "clickhouse" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (pgLikeToClickHousePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildPGLikeToClickHousePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (clickHouseToMySQLPlanner) Name() string { return "clickhouse-mysql-planner" }
+
+func (clickHouseToMySQLPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "clickhouse" && isMySQLLikeWritableTargetType(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (clickHouseToMySQLPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildClickHouseToMySQLPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (clickHouseToPGLikePlanner) Name() string { return "clickhouse-pglike-planner" }
+
+func (clickHouseToPGLikePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "clickhouse" && isPGLikeTarget(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (clickHouseToPGLikePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildClickHouseToPGLikePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (mysqlToMongoPlanner) Name() string { return "mysql-mongo-planner" }
+
+func (mysqlToMongoPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isMySQLCoreType(sourceType) && targetType == "mongodb" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (mysqlToMongoPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildMySQLToMongoPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (pgLikeToMongoPlanner) Name() string { return "pglike-mongo-planner" }
+
+func (pgLikeToMongoPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isPGLikeSource(sourceType) && targetType == "mongodb" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (pgLikeToMongoPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildPGLikeToMongoPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (clickHouseToMongoPlanner) Name() string { return "clickhouse-mongo-planner" }
+
+func (clickHouseToMongoPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "clickhouse" && targetType == "mongodb" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (clickHouseToMongoPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildClickHouseToMongoPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (tdengineToMongoPlanner) Name() string { return "tdengine-mongo-planner" }
+
+func (tdengineToMongoPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "tdengine" && targetType == "mongodb" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (tdengineToMongoPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTDengineToMongoPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (mongoToMySQLPlanner) Name() string { return "mongo-mysql-planner" }
+
+func (mongoToMySQLPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "mongodb" && isMySQLLikeWritableTargetType(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (mongoToMySQLPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildMongoToMySQLPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (mongoToPGLikePlanner) Name() string { return "mongo-pglike-planner" }
+
+func (mongoToPGLikePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "mongodb" && isPGLikeTarget(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (mongoToPGLikePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildMongoToPGLikePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (pgLikeToMySQLPlanner) Name() string { return "pglike-mysql-planner" }
+
+func (pgLikeToMySQLPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isPGLikeSource(sourceType) && isMySQLLikeWritableTargetType(targetType) {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (pgLikeToMySQLPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildPGLikeToMySQLPlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (mongoToRelationalPlanner) Name() string { return "mongo-relational-inference-planner" }
+
+func (mongoToRelationalPlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if !shouldUseSchemaInference(sourceType, targetType) {
+		return MigrationSupportLevelUnsupported
+	}
+	return MigrationSupportLevelPlanned
+}
+
+func (mongoToRelationalPlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	inference, err := inferSchemaForPair(sourceType, targetType, ctx.TableName)
+	if err != nil {
+		return SchemaMigrationPlan{}, nil, nil, err
+	}
+	plan := SchemaMigrationPlan{}
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(sourceType, ctx.Config.SourceConfig.Database, ctx.TableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(targetType, ctx.Config.TargetConfig.Database, ctx.TableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(sourceType, plan.SourceSchema, plan.SourceTable, ctx.TableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(targetType, plan.TargetSchema, plan.TargetTable, ctx.TableName)
+	plan.PlannedAction = "当前库对已进入迁移内核规划阶段，等待 schema 推断与目标方言生成器落地"
+	for _, issue := range inference.Issues {
+		msg := strings.TrimSpace(issue.Message)
+		if msg == "" {
+			continue
+		}
+		plan.Warnings = append(plan.Warnings, msg)
+	}
+	plan.Warnings = append(plan.Warnings, fmt.Sprintf("迁移对象=%s，目标类型=%s，当前仅提供规划入口，暂不执行自动建表", inference.Object.Kind, targetType))
+	return dedupeSchemaMigrationPlan(plan), nil, nil, nil
+}

internal/sync/migration_kernel_router_test.go

@@ -0,0 +1,447 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"strings"
+	"testing"
+)
+
+func TestClassifyMigrationDataModel(t *testing.T) {
+	t.Parallel()
+
+	cases := map[string]MigrationDataModel{
+		"mysql":      MigrationDataModelRelational,
+		"postgres":   MigrationDataModelRelational,
+		"kingbase":   MigrationDataModelRelational,
+		"mongodb":    MigrationDataModelDocument,
+		"clickhouse": MigrationDataModelColumnar,
+		"tdengine":   MigrationDataModelTimeSeries,
+		"redis":      MigrationDataModelKeyValue,
+		"custom":     MigrationDataModelCustom,
+	}
+
+	for input, want := range cases {
+		input, want := input, want
+		t.Run(input, func(t *testing.T) {
+			t.Parallel()
+			got := classifyMigrationDataModel(input)
+			if got != want {
+				t.Fatalf("unexpected data model, input=%s got=%s want=%s", input, got, want)
+			}
+		})
+	}
+}
+
+func TestResolveMigrationPlanner_PrefersMySQLKingbasePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "kingbase"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "mysql-pglike-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_UsesSchemaInferencePlannerForMongoToMySQL(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mongodb"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "mongo-mysql-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestInferSchemaForPair_MongoToMySQLReturnsPlannedWarning(t *testing.T) {
+	t.Parallel()
+
+	result, err := inferSchemaForPair("mongodb", "mysql", "users")
+	if err != nil {
+		t.Fatalf("inferSchemaForPair returned error: %v", err)
+	}
+	if !result.NeedsReview {
+		t.Fatalf("expected needs review")
+	}
+	if result.Object.Name != "users" {
+		t.Fatalf("unexpected object name: %s", result.Object.Name)
+	}
+	if len(result.Issues) == 0 || !strings.Contains(result.Issues[0].Message, "schema 推断") {
+		t.Fatalf("unexpected issues: %+v", result.Issues)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikeMySQLPlannerForKingbaseToMySQL(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "kingbase"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "pglike-mysql-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLPGLikePlannerForMySQLToPostgres(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "postgres"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "mysql-pglike-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLClickHousePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "clickhouse"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "mysql-clickhouse-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_UsesClickHouseMySQLPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "clickhouse"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "clickhouse-mysql-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLMongoPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "mongodb"},
+		},
+	})
+	if planner == nil || planner.Name() != "mysql-mongo-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMongoMySQLPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mongodb"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil || planner.Name() != "mongo-mysql-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMongoPGLikePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mongodb"},
+			TargetConfig: connection.ConnectionConfig{Type: "postgres"},
+		},
+	})
+	if planner == nil || planner.Name() != "mongo-pglike-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikeMongoPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "postgres"},
+			TargetConfig: connection.ConnectionConfig{Type: "mongodb"},
+		},
+	})
+	if planner == nil || planner.Name() != "pglike-mongo-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesClickHouseMongoPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "clickhouse"},
+			TargetConfig: connection.ConnectionConfig{Type: "mongodb"},
+		},
+	})
+	if planner == nil || planner.Name() != "clickhouse-mongo-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesTDengineMongoPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "tdengine"},
+			TargetConfig: connection.ConnectionConfig{Type: "mongodb"},
+		},
+	})
+	if planner == nil || planner.Name() != "tdengine-mongo-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLPGLikePlannerForDirosToPostgres(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "diros"},
+			TargetConfig: connection.ConnectionConfig{Type: "postgres"},
+		},
+	})
+	if planner == nil || planner.Name() != "mysql-pglike-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikeMySQLPlannerForPostgresToDiros(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "postgres"},
+			TargetConfig: connection.ConnectionConfig{Type: "diros"},
+		},
+	})
+	if planner == nil || planner.Name() != "pglike-mysql-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLPGLikePlannerForMySQLToDuckDB(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "duckdb"},
+		},
+	})
+	if planner == nil || planner.Name() != "mysql-pglike-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikeClickHousePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "postgres"},
+			TargetConfig: connection.ConnectionConfig{Type: "clickhouse"},
+		},
+	})
+	if planner == nil || planner.Name() != "pglike-clickhouse-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikeMySQLPlannerForDuckDBToMySQL(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "duckdb"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil || planner.Name() != "pglike-mysql-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLPGLikePlannerForSphinxToPostgres(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "sphinx"},
+			TargetConfig: connection.ConnectionConfig{Type: "postgres"},
+		},
+	})
+	if planner == nil || planner.Name() != "mysql-pglike-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikeMySQLPlannerForCustomKingbaseToMySQL(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "custom", Driver: "kingbase8"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil || planner.Name() != "pglike-mysql-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLPGLikePlannerForMySQLToCustomPostgres(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "custom", Driver: "postgresql"},
+		},
+	})
+	if planner == nil || planner.Name() != "mysql-pglike-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesTDengineMySQLPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "tdengine"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil || planner.Name() != "tdengine-mysql-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesTDenginePGLikePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "tdengine"},
+			TargetConfig: connection.ConnectionConfig{Type: "kingbase"},
+		},
+	})
+	if planner == nil || planner.Name() != "tdengine-pglike-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMySQLLikeTDenginePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "tdengine"},
+		},
+	})
+	if planner == nil || planner.Name() != "mysqllike-tdengine-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikeTDenginePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "postgres"},
+			TargetConfig: connection.ConnectionConfig{Type: "tdengine"},
+		},
+	})
+	if planner == nil || planner.Name() != "pglike-tdengine-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesClickHouseTDenginePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "clickhouse"},
+			TargetConfig: connection.ConnectionConfig{Type: "tdengine"},
+		},
+	})
+	if planner == nil || planner.Name() != "clickhouse-tdengine-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesClickHousePGLikePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "clickhouse"},
+			TargetConfig: connection.ConnectionConfig{Type: "postgres"},
+		},
+	})
+	if planner == nil || planner.Name() != "clickhouse-pglike-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}
+
+func TestResolveMigrationPlanner_UsesTDengineTDenginePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "tdengine"},
+			TargetConfig: connection.ConnectionConfig{Type: "tdengine"},
+		},
+	})
+	if planner == nil || planner.Name() != "tdengine-tdengine-planner" {
+		t.Fatalf("unexpected planner: %v", planner)
+	}
+}

internal/sync/migration_kernel_types.go

@@ -0,0 +1,104 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+)
+
+type MigrationDataModel string
+
+const (
+	MigrationDataModelRelational MigrationDataModel = "relational"
+	MigrationDataModelDocument   MigrationDataModel = "document"
+	MigrationDataModelColumnar   MigrationDataModel = "columnar"
+	MigrationDataModelTimeSeries MigrationDataModel = "timeseries"
+	MigrationDataModelKeyValue   MigrationDataModel = "keyvalue"
+	MigrationDataModelCustom     MigrationDataModel = "custom"
+)
+
+type MigrationObjectKind string
+
+const (
+	MigrationObjectKindTable      MigrationObjectKind = "table"
+	MigrationObjectKindCollection MigrationObjectKind = "collection"
+	MigrationObjectKindKeyspace   MigrationObjectKind = "keyspace"
+)
+
+type MigrationSupportLevel string
+
+const (
+	MigrationSupportLevelFull        MigrationSupportLevel = "full"
+	MigrationSupportLevelPartial     MigrationSupportLevel = "partial"
+	MigrationSupportLevelPlanned     MigrationSupportLevel = "planned"
+	MigrationSupportLevelUnsupported MigrationSupportLevel = "unsupported"
+)
+
+type CanonicalFieldSpec struct {
+	Name          string
+	SourceType    string
+	CanonicalType string
+	Nullable      bool
+	DefaultValue  *string
+	AutoIncrement bool
+	Comment       string
+	NestedPath    string
+	Confidence    float64
+}
+
+type CanonicalIndexSpec struct {
+	Name            string
+	Kind            string
+	Columns         []string
+	Expression      string
+	PrefixLength    int
+	Supported       bool
+	DegradeStrategy string
+	Unique          bool
+}
+
+type CanonicalConstraintSpec struct {
+	Name    string
+	Kind    string
+	Columns []string
+	RefName string
+}
+
+type CanonicalObjectSpec struct {
+	Name        string
+	Schema      string
+	Kind        MigrationObjectKind
+	Fields      []CanonicalFieldSpec
+	PrimaryKey  []string
+	Indexes     []CanonicalIndexSpec
+	Constraints []CanonicalConstraintSpec
+	Comments    []string
+	SourceHints map[string]string
+}
+
+type SchemaInferenceIssue struct {
+	Field      string
+	Level      string
+	Message    string
+	Resolution string
+}
+
+type SchemaInferenceResult struct {
+	Object      CanonicalObjectSpec
+	Issues      []SchemaInferenceIssue
+	SampleSize  int
+	Confidence  float64
+	NeedsReview bool
+}
+
+type MigrationBuildContext struct {
+	Config    SyncConfig
+	TableName string
+	SourceDB  db.Database
+	TargetDB  db.Database
+}
+
+type MigrationPlanner interface {
+	Name() string
+	SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel
+	BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error)
+}

internal/sync/migration_mongodb.go

@@ -0,0 +1,603 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	"encoding/json"
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+)
+
+func buildMySQLToMongoPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTabularToMongoPlan(config, tableName, sourceDB, targetDB)
+}
+
+func buildPGLikeToMongoPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTabularToMongoPlan(config, tableName, sourceDB, targetDB)
+}
+
+func buildClickHouseToMongoPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTabularToMongoPlan(config, tableName, sourceDB, targetDB)
+}
+
+func buildTDengineToMongoPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTabularToMongoPlan(config, tableName, sourceDB, targetDB)
+}
+
+func buildTabularToMongoPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	sourceType := resolveMigrationDBType(config.SourceConfig)
+	targetType := resolveMigrationDBType(config.TargetConfig)
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(sourceType, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(sourceType, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(targetType, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标集合导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	targetExists, err := inspectMongoCollection(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("检查目标集合失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		plan.Warnings = append(plan.Warnings, "MongoDB 为弱 schema 目标，字段结构以写入文档为准，不执行目标列校验")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, nil, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标集合不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标集合已存在，执行时不会自动创建")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, nil, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标集合不存在，将自动创建集合后导入"
+		createCmd, err := buildMongoCreateCollectionCommand(plan.TargetTable)
+		if err != nil {
+			return plan, sourceCols, nil, err
+		}
+		plan.PreDataSQL = append(plan.PreDataSQL, createCmd)
+		if config.CreateIndexes {
+			indexCmds, warnings, unsupported, created, skipped, err := buildMongoIndexCommands(sourceDB, plan.SourceSchema, plan.SourceTable, plan.TargetTable)
+			if err != nil {
+				plan.Warnings = append(plan.Warnings, fmt.Sprintf("读取源表索引失败，已跳过索引迁移：%v", err))
+			} else {
+				plan.PostDataSQL = append(plan.PostDataSQL, indexCmds...)
+				plan.Warnings = append(plan.Warnings, warnings...)
+				plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+				plan.IndexesToCreate = created
+				plan.IndexesSkipped = skipped
+			}
+		}
+		return dedupeSchemaMigrationPlan(plan), sourceCols, nil, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, nil, nil
+	}
+}
+
+func buildMongoToMySQLPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(config.SourceConfig.Type, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(config.TargetConfig.Type, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, warnings, err := inferMongoCollectionColumns(sourceDB, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, err
+	}
+	plan.Warnings = append(plan.Warnings, warnings...)
+	if len(sourceCols) == 0 {
+		return plan, nil, nil, fmt.Errorf("源集合未推断出可迁移字段: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if config.AutoAddColumns {
+			addSQL, addWarnings := buildMongoToMySQLAddColumnSQL(plan.TargetQueryTable, sourceCols, targetCols)
+			plan.PreDataSQL = append(plan.PreDataSQL, addSQL...)
+			plan.Warnings = append(plan.Warnings, addWarnings...)
+			if len(addSQL) > 0 {
+				plan.PlannedAction = fmt.Sprintf("补齐缺失字段(%d)后导入", len(addSQL))
+			}
+		}
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, postSQL, moreWarnings, unsupported, idxCreate, idxSkip, err := buildMongoToMySQLCreateTablePlan(config, plan.TargetQueryTable, sourceCols, sourceDB, plan.SourceSchema, plan.SourceTable)
+		if err != nil {
+			return plan, sourceCols, targetCols, err
+		}
+		plan.CreateTableSQL = createSQL
+		plan.PostDataSQL = append(plan.PostDataSQL, postSQL...)
+		plan.Warnings = append(plan.Warnings, moreWarnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		plan.IndexesToCreate = idxCreate
+		plan.IndexesSkipped = idxSkip
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func inspectMongoCollection(database db.Database, dbName, collection string) (bool, error) {
+	items, err := database.GetTables(dbName)
+	if err != nil {
+		return false, err
+	}
+	target := strings.TrimSpace(collection)
+	for _, item := range items {
+		if strings.EqualFold(strings.TrimSpace(item), target) {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+func buildMongoCreateCollectionCommand(collection string) (string, error) {
+	cmd := map[string]interface{}{"create": strings.TrimSpace(collection)}
+	data, err := json.Marshal(cmd)
+	if err != nil {
+		return "", err
+	}
+	return string(data), nil
+}
+
+func buildMongoIndexCommands(sourceDB db.Database, dbName, tableName, targetCollection string) ([]string, []string, []string, int, int, error) {
+	indexes, err := sourceDB.GetIndexes(dbName, tableName)
+	if err != nil {
+		return nil, nil, nil, 0, 0, err
+	}
+	grouped := groupIndexDefinitions(indexes)
+	cmds := make([]string, 0, len(grouped))
+	warnings := make([]string, 0)
+	unsupported := make([]string, 0)
+	created := 0
+	skipped := 0
+	for _, idx := range grouped {
+		name := strings.TrimSpace(idx.Name)
+		if name == "" || strings.EqualFold(name, "primary") {
+			continue
+		}
+		if len(idx.Columns) == 0 {
+			skipped++
+			unsupported = append(unsupported, fmt.Sprintf("索引 %s 缺少列定义，已跳过", name))
+			continue
+		}
+		kind := strings.ToLower(strings.TrimSpace(idx.IndexType))
+		if idx.SubPart > 0 {
+			skipped++
+			unsupported = append(unsupported, fmt.Sprintf("索引 %s 使用前缀长度，MongoDB 目标暂不支持等价迁移", name))
+			continue
+		}
+		if kind != "" && kind != "btree" {
+			warnings = append(warnings, fmt.Sprintf("索引 %s 类型=%s 将按普通索引迁移到 MongoDB", name, idx.IndexType))
+		}
+		keySpec := make(map[string]int)
+		for _, col := range idx.Columns {
+			keySpec[col] = 1
+		}
+		command := map[string]interface{}{
+			"createIndexes": strings.TrimSpace(targetCollection),
+			"indexes": []map[string]interface{}{{
+				"name":   name,
+				"key":    keySpec,
+				"unique": idx.Unique,
+			}},
+		}
+		data, err := json.Marshal(command)
+		if err != nil {
+			skipped++
+			unsupported = append(unsupported, fmt.Sprintf("索引 %s 生成 MongoDB createIndexes 命令失败：%v", name, err))
+			continue
+		}
+		cmds = append(cmds, string(data))
+		created++
+	}
+	return cmds, dedupeStrings(warnings), dedupeStrings(unsupported), created, skipped, nil
+}
+
+func inferMongoCollectionColumns(sourceDB db.Database, collection string) ([]connection.ColumnDefinition, []string, error) {
+	query := fmt.Sprintf(`{"find":"%s","filter":{},"limit":200}`, strings.TrimSpace(collection))
+	rows, _, err := sourceDB.Query(query)
+	if err != nil {
+		return nil, nil, fmt.Errorf("读取源集合样本失败: %w", err)
+	}
+	if len(rows) == 0 {
+		return []connection.ColumnDefinition{{Name: "_id", Type: "varchar(64)", Nullable: "NO", Key: "PRI"}}, []string{"源集合暂无样本数据，仅按 `_id` 生成基础主键列"}, nil
+	}
+	fieldNames := make(map[string]struct{})
+	for _, row := range rows {
+		for key := range row {
+			fieldNames[key] = struct{}{}
+		}
+	}
+	orderedFields := make([]string, 0, len(fieldNames))
+	for key := range fieldNames {
+		orderedFields = append(orderedFields, key)
+	}
+	sort.Strings(orderedFields)
+	if containsString(orderedFields, "_id") {
+		orderedFields = moveStringToFront(orderedFields, "_id")
+	}
+	columns := make([]connection.ColumnDefinition, 0, len(orderedFields))
+	warnings := make([]string, 0)
+	for _, field := range orderedFields {
+		typeName, nullable, fieldWarnings := inferMongoFieldType(rows, field)
+		warnings = append(warnings, fieldWarnings...)
+		col := connection.ColumnDefinition{
+			Name:     field,
+			Type:     typeName,
+			Nullable: ternaryString(nullable, "YES", "NO"),
+			Key:      "",
+			Extra:    "",
+		}
+		if field == "_id" {
+			col.Key = "PRI"
+			col.Nullable = "NO"
+		}
+		columns = append(columns, col)
+	}
+	return columns, dedupeStrings(warnings), nil
+}
+
+func inferMongoFieldType(rows []map[string]interface{}, field string) (string, bool, []string) {
+	nullable := false
+	hasString, hasBool, hasInt, hasFloat, hasTime, hasComplex := false, false, false, false, false, false
+	for _, row := range rows {
+		value, ok := row[field]
+		if !ok || value == nil {
+			nullable = true
+			continue
+		}
+		switch value.(type) {
+		case bool:
+			hasBool = true
+		case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
+			hasInt = true
+		case float32, float64:
+			hasFloat = true
+		case time.Time:
+			hasTime = true
+		case map[string]interface{}, []interface{}:
+			hasComplex = true
+		default:
+			hasString = true
+		}
+	}
+	kinds := 0
+	for _, flag := range []bool{hasString, hasBool, hasInt, hasFloat, hasTime, hasComplex} {
+		if flag {
+			kinds++
+		}
+	}
+	warnings := make([]string, 0)
+	if kinds > 1 {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 存在多种 BSON 值类型，已按兼容类型降级", field))
+	}
+	if field == "_id" {
+		return "varchar(64)", false, warnings
+	}
+	switch {
+	case hasComplex:
+		return "json", nullable, warnings
+	case hasTime:
+		return "datetime", nullable, warnings
+	case hasFloat:
+		return "double", nullable, warnings
+	case hasInt:
+		return "bigint", nullable, warnings
+	case hasBool:
+		return "tinyint(1)", nullable, warnings
+	default:
+		return "varchar(255)", nullable, warnings
+	}
+}
+
+func buildMongoToMySQLAddColumnSQL(targetQueryTable string, sourceCols, targetCols []connection.ColumnDefinition) ([]string, []string) {
+	targetSet := make(map[string]struct{}, len(targetCols))
+	for _, col := range targetCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		targetSet[key] = struct{}{}
+	}
+	var sqlList []string
+	for _, col := range sourceCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		if _, ok := targetSet[key]; ok {
+			continue
+		}
+		sqlList = append(sqlList, fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+			quoteQualifiedIdentByType("mysql", targetQueryTable),
+			quoteIdentByType("mysql", col.Name),
+			strings.TrimSpace(col.Type),
+		))
+	}
+	return sqlList, nil
+}
+
+func buildMongoToMySQLCreateTablePlan(config SyncConfig, targetQueryTable string, sourceCols []connection.ColumnDefinition, sourceDB db.Database, sourceSchema, sourceTable string) (string, []string, []string, []string, int, int, error) {
+	columnDefs := make([]string, 0, len(sourceCols)+1)
+	warnings := make([]string, 0)
+	unsupported := make([]string, 0)
+	pkCols := make([]string, 0, 1)
+	for _, col := range sourceCols {
+		columnDef := fmt.Sprintf("%s %s", quoteIdentByType("mysql", col.Name), strings.TrimSpace(col.Type))
+		if strings.EqualFold(strings.TrimSpace(col.Nullable), "NO") {
+			columnDef += " NOT NULL"
+		}
+		columnDefs = append(columnDefs, columnDef)
+		if col.Key == "PRI" || col.Key == "PK" {
+			pkCols = append(pkCols, quoteIdentByType("mysql", col.Name))
+		}
+	}
+	if len(pkCols) > 0 {
+		columnDefs = append(columnDefs, fmt.Sprintf("PRIMARY KEY (%s)", strings.Join(pkCols, ", ")))
+	} else {
+		warnings = append(warnings, "MongoDB 源集合未推断出稳定主键，目标表将不自动创建主键")
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType("mysql", targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	if !config.CreateIndexes {
+		return createSQL, nil, dedupeStrings(warnings), dedupeStrings(unsupported), 0, 0, nil
+	}
+	indexes, err := sourceDB.GetIndexes(sourceSchema, sourceTable)
+	if err != nil {
+		warnings = append(warnings, fmt.Sprintf("读取源集合索引失败，已跳过索引迁移：%v", err))
+		return createSQL, nil, dedupeStrings(warnings), dedupeStrings(unsupported), 0, 0, nil
+	}
+	grouped := groupIndexDefinitions(indexes)
+	postSQL := make([]string, 0, len(grouped))
+	created := 0
+	skipped := 0
+	for _, idx := range grouped {
+		name := strings.TrimSpace(idx.Name)
+		if name == "" || strings.EqualFold(name, "_id_") || strings.EqualFold(name, "primary") {
+			continue
+		}
+		if len(idx.Columns) == 0 {
+			skipped++
+			unsupported = append(unsupported, fmt.Sprintf("索引 %s 缺少列定义，已跳过", name))
+			continue
+		}
+		quotedCols := make([]string, 0, len(idx.Columns))
+		for _, col := range idx.Columns {
+			quotedCols = append(quotedCols, quoteIdentByType("mysql", col))
+		}
+		prefix := "CREATE INDEX"
+		if idx.Unique {
+			prefix = "CREATE UNIQUE INDEX"
+		}
+		postSQL = append(postSQL, fmt.Sprintf("%s %s ON %s (%s)", prefix, quoteIdentByType("mysql", name), quoteQualifiedIdentByType("mysql", targetQueryTable), strings.Join(quotedCols, ", ")))
+		created++
+	}
+	return createSQL, postSQL, dedupeStrings(warnings), dedupeStrings(unsupported), created, skipped, nil
+}
+
+func containsString(items []string, target string) bool {
+	for _, item := range items {
+		if item == target {
+			return true
+		}
+	}
+	return false
+}
+
+func moveStringToFront(items []string, target string) []string {
+	out := make([]string, 0, len(items))
+	for _, item := range items {
+		if item == target {
+			continue
+		}
+		out = append(out, item)
+	}
+	return append([]string{target}, out...)
+}
+
+func buildMongoToPGLikePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	targetType := strings.ToLower(strings.TrimSpace(config.TargetConfig.Type))
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(config.SourceConfig.Type, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(config.TargetConfig.Type, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, warnings, err := inferMongoCollectionColumns(sourceDB, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, err
+	}
+	plan.Warnings = append(plan.Warnings, warnings...)
+	if len(sourceCols) == 0 {
+		return plan, nil, nil, fmt.Errorf("源集合未推断出可迁移字段: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if config.AutoAddColumns {
+			addSQL, addWarnings := buildMongoToPGLikeAddColumnSQL(targetType, plan.TargetQueryTable, sourceCols, targetCols)
+			plan.PreDataSQL = append(plan.PreDataSQL, addSQL...)
+			plan.Warnings = append(plan.Warnings, addWarnings...)
+			if len(addSQL) > 0 {
+				plan.PlannedAction = fmt.Sprintf("补齐缺失字段(%d)后导入", len(addSQL))
+			}
+		}
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, postSQL, moreWarnings, unsupported, idxCreate, idxSkip, err := buildMongoToPGLikeCreateTablePlan(targetType, config, plan.TargetQueryTable, sourceCols, sourceDB, plan.SourceSchema, plan.SourceTable)
+		if err != nil {
+			return plan, sourceCols, targetCols, err
+		}
+		plan.CreateTableSQL = createSQL
+		plan.PostDataSQL = append(plan.PostDataSQL, postSQL...)
+		plan.Warnings = append(plan.Warnings, moreWarnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		plan.IndexesToCreate = idxCreate
+		plan.IndexesSkipped = idxSkip
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func buildMongoToPGLikeAddColumnSQL(targetType string, targetQueryTable string, sourceCols, targetCols []connection.ColumnDefinition) ([]string, []string) {
+	targetSet := make(map[string]struct{}, len(targetCols))
+	for _, col := range targetCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		targetSet[key] = struct{}{}
+	}
+	var sqlList []string
+	var warnings []string
+	for _, col := range sourceCols {
+		key := strings.ToLower(strings.TrimSpace(col.Name))
+		if key == "" {
+			continue
+		}
+		if _, ok := targetSet[key]; ok {
+			continue
+		}
+		colType, mapWarnings := mapMongoInferredColumnToPGLike(col)
+		warnings = append(warnings, mapWarnings...)
+		sqlList = append(sqlList, fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+			quoteQualifiedIdentByType(targetType, targetQueryTable),
+			quoteIdentByType(targetType, col.Name),
+			colType,
+		))
+	}
+	return sqlList, dedupeStrings(warnings)
+}
+
+func buildMongoToPGLikeCreateTablePlan(targetType string, config SyncConfig, targetQueryTable string, sourceCols []connection.ColumnDefinition, sourceDB db.Database, sourceSchema, sourceTable string) (string, []string, []string, []string, int, int, error) {
+	columnDefs := make([]string, 0, len(sourceCols)+1)
+	warnings := make([]string, 0)
+	unsupported := make([]string, 0)
+	pkCols := make([]string, 0, 1)
+	for _, col := range sourceCols {
+		colType, colWarnings := mapMongoInferredColumnToPGLike(col)
+		warnings = append(warnings, colWarnings...)
+		parts := []string{colType}
+		if strings.EqualFold(strings.TrimSpace(col.Nullable), "NO") {
+			parts = append(parts, "NOT NULL")
+		}
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType(targetType, col.Name), strings.Join(parts, " ")))
+		if col.Key == "PRI" || col.Key == "PK" {
+			pkCols = append(pkCols, quoteIdentByType(targetType, col.Name))
+		}
+	}
+	if len(pkCols) > 0 {
+		columnDefs = append(columnDefs, fmt.Sprintf("PRIMARY KEY (%s)", strings.Join(pkCols, ", ")))
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType(targetType, targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	if !config.CreateIndexes {
+		return createSQL, nil, dedupeStrings(warnings), dedupeStrings(unsupported), 0, 0, nil
+	}
+	indexes, err := sourceDB.GetIndexes(sourceSchema, sourceTable)
+	if err != nil {
+		warnings = append(warnings, fmt.Sprintf("读取源集合索引失败，已跳过索引迁移：%v", err))
+		return createSQL, nil, dedupeStrings(warnings), dedupeStrings(unsupported), 0, 0, nil
+	}
+	grouped := groupIndexDefinitions(indexes)
+	postSQL := make([]string, 0, len(grouped))
+	created := 0
+	skipped := 0
+	for _, idx := range grouped {
+		name := strings.TrimSpace(idx.Name)
+		if name == "" || strings.EqualFold(name, "_id_") || strings.EqualFold(name, "primary") {
+			continue
+		}
+		if len(idx.Columns) == 0 {
+			skipped++
+			unsupported = append(unsupported, fmt.Sprintf("索引 %s 缺少列定义，已跳过", name))
+			continue
+		}
+		quotedCols := make([]string, 0, len(idx.Columns))
+		for _, col := range idx.Columns {
+			quotedCols = append(quotedCols, quoteIdentByType(targetType, col))
+		}
+		prefix := "CREATE INDEX"
+		if idx.Unique {
+			prefix = "CREATE UNIQUE INDEX"
+		}
+		postSQL = append(postSQL, fmt.Sprintf("%s %s ON %s (%s)", prefix, quoteIdentByType(targetType, name), quoteQualifiedIdentByType(targetType, targetQueryTable), strings.Join(quotedCols, ", ")))
+		created++
+	}
+	return createSQL, postSQL, dedupeStrings(warnings), dedupeStrings(unsupported), created, skipped, nil
+}
+
+func mapMongoInferredColumnToPGLike(col connection.ColumnDefinition) (string, []string) {
+	raw := strings.ToLower(strings.TrimSpace(col.Type))
+	warnings := make([]string, 0)
+	switch {
+	case strings.HasPrefix(raw, "varchar"):
+		return col.Type, warnings
+	case raw == "json":
+		return "jsonb", warnings
+	case raw == "datetime":
+		return "timestamp", warnings
+	case raw == "tinyint(1)":
+		return "boolean", warnings
+	case raw == "double":
+		return "double precision", warnings
+	case raw == "bigint":
+		return "bigint", warnings
+	default:
+		return col.Type, warnings
+	}
+}

internal/sync/migration_runtime_helpers.go

@@ -0,0 +1,58 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"fmt"
+	"strings"
+)
+
+func supportsAutoAddColumnsForPair(sourceType string, targetType string) bool {
+	source := normalizeMigrationDBType(sourceType)
+	target := normalizeMigrationDBType(targetType)
+	if isMySQLLikeWritableTargetType(target) {
+		return isMySQLCoreType(source)
+	}
+	if isPGLikeTarget(target) {
+		return isMySQLLikeSourceType(source)
+	}
+	return false
+}
+
+func buildAddColumnSQLForPair(sourceType string, targetType string, targetQueryTable string, sourceCol connection.ColumnDefinition) (string, error) {
+	source := normalizeMigrationDBType(sourceType)
+	target := normalizeMigrationDBType(targetType)
+	switch {
+	case isMySQLCoreType(source) && isMySQLLikeWritableTargetType(target):
+		colType := sanitizeMySQLColumnType(sourceCol.Type)
+		return fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+			quoteQualifiedIdentByType("mysql", targetQueryTable),
+			quoteIdentByType("mysql", sourceCol.Name),
+			colType,
+		), nil
+	case isMySQLLikeSourceType(source) && isPGLikeTarget(target):
+		colType, _, warnings := mapMySQLColumnToKingbase(sourceCol)
+		if len(warnings) > 0 && strings.Contains(strings.Join(warnings, " "), "identity") {
+			// 对已有目标表补字段时保守处理，不补建自增语义。
+		}
+		return fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
+			quoteQualifiedIdentByType(target, targetQueryTable),
+			quoteIdentByType(target, sourceCol.Name),
+			colType,
+		), nil
+	default:
+		return "", fmt.Errorf("当前不支持 source=%s target=%s 的自动补字段", sourceType, targetType)
+	}
+}
+
+func executeSQLStatements(execFn func(string) (int64, error), statements []string) error {
+	for _, stmt := range statements {
+		trimmed := strings.TrimSpace(stmt)
+		if trimmed == "" {
+			continue
+		}
+		if _, err := execFn(trimmed); err != nil {
+			return err
+		}
+	}
+	return nil
+}

internal/sync/migration_schema_inference.go

@@ -0,0 +1,53 @@
+package sync
+
+import (
+	"fmt"
+	"strings"
+)
+
+type SchemaInferenceStrategy string
+
+const (
+	SchemaInferenceStrategySample SchemaInferenceStrategy = "sample"
+	SchemaInferenceStrategyStrict SchemaInferenceStrategy = "strict"
+)
+
+func shouldUseSchemaInference(sourceType string, targetType string) bool {
+	sourceModel := classifyMigrationDataModel(sourceType)
+	targetModel := classifyMigrationDataModel(targetType)
+	return sourceModel == MigrationDataModelDocument && targetModel == MigrationDataModelRelational
+}
+
+func inferMigrationObjectKind(sourceType string, targetType string) MigrationObjectKind {
+	sourceModel := classifyMigrationDataModel(sourceType)
+	targetModel := classifyMigrationDataModel(targetType)
+	switch {
+	case sourceModel == MigrationDataModelDocument || targetModel == MigrationDataModelDocument:
+		return MigrationObjectKindCollection
+	case sourceModel == MigrationDataModelKeyValue || targetModel == MigrationDataModelKeyValue:
+		return MigrationObjectKindKeyspace
+	default:
+		return MigrationObjectKindTable
+	}
+}
+
+func inferSchemaForPair(sourceType string, targetType string, objectName string) (SchemaInferenceResult, error) {
+	if !shouldUseSchemaInference(sourceType, targetType) {
+		return SchemaInferenceResult{}, fmt.Errorf("当前迁移对 %s -> %s 不需要 schema 推断", sourceType, targetType)
+	}
+	return SchemaInferenceResult{
+		Object: CanonicalObjectSpec{
+			Name:   strings.TrimSpace(objectName),
+			Kind:   MigrationObjectKindCollection,
+			Fields: []CanonicalFieldSpec{},
+		},
+		Issues: []SchemaInferenceIssue{
+			{
+				Level:      "info",
+				Message:    "MongoDB -> 关系型数据库的 schema 推断能力尚在建设中，当前仅提供内核入口。",
+				Resolution: "后续将基于样本数据生成列定义与类型降级策略。",
+			},
+		},
+		NeedsReview: true,
+	}, nil
+}

internal/sync/migration_tdengine.go

@@ -0,0 +1,296 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func buildTDengineToMySQLPlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	sourceType := resolveMigrationDBType(config.SourceConfig)
+	targetType := resolveMigrationDBType(config.TargetConfig)
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(sourceType, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(sourceType, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(targetType, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+	plan.Warnings = append(plan.Warnings, tdengineSemanticWarnings(sourceCols)...)
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if strategy != "existing_only" {
+			plan.Warnings = append(plan.Warnings, "TDengine 源端当前不自动补齐已有目标表字段，请先确认目标表结构")
+		}
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, warnings, unsupported := buildTDengineToMySQLCreateTableSQL(plan.TargetQueryTable, sourceCols)
+		plan.CreateTableSQL = createSQL
+		plan.Warnings = append(plan.Warnings, warnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func buildTDengineToPGLikePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	sourceType := resolveMigrationDBType(config.SourceConfig)
+	targetType := resolveMigrationDBType(config.TargetConfig)
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(sourceType, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(sourceType, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(targetType, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+	plan.Warnings = append(plan.Warnings, tdengineSemanticWarnings(sourceCols)...)
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if strategy != "existing_only" {
+			plan.Warnings = append(plan.Warnings, "TDengine 源端当前不自动补齐已有目标表字段，请先确认目标表结构")
+		}
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, warnings, unsupported := buildTDengineToPGLikeCreateTableSQL(targetType, plan.TargetQueryTable, sourceCols)
+		plan.CreateTableSQL = createSQL
+		plan.Warnings = append(plan.Warnings, warnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func buildTDengineToMySQLCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition) (string, []string, []string) {
+	columnDefs := make([]string, 0, len(sourceCols))
+	warnings := make([]string, 0)
+	unsupported := []string{"TDengine 的索引/外键/触发器/超级表/TTL 等时序语义当前不会自动迁移"}
+	for _, col := range sourceCols {
+		def, colWarnings := buildTDengineToMySQLColumnDefinition(col)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("mysql", col.Name), def))
+		warnings = append(warnings, colWarnings...)
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType("mysql", targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildTDengineToPGLikeCreateTableSQL(targetType string, targetQueryTable string, sourceCols []connection.ColumnDefinition) (string, []string, []string) {
+	columnDefs := make([]string, 0, len(sourceCols))
+	warnings := make([]string, 0)
+	unsupported := []string{"TDengine 的索引/外键/触发器/超级表/TTL 等时序语义当前不会自动迁移"}
+	for _, col := range sourceCols {
+		def, colWarnings := buildTDengineToPGLikeColumnDefinition(col)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType(targetType, col.Name), def))
+		warnings = append(warnings, colWarnings...)
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType(targetType, targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildTDengineToMySQLColumnDefinition(col connection.ColumnDefinition) (string, []string) {
+	targetType, warnings := mapTDengineColumnToMySQL(col)
+	parts := []string{targetType}
+	if strings.EqualFold(strings.TrimSpace(col.Nullable), "NO") {
+		parts = append(parts, "NOT NULL")
+	} else {
+		parts = append(parts, "NULL")
+	}
+	return strings.Join(parts, " "), warnings
+}
+
+func buildTDengineToPGLikeColumnDefinition(col connection.ColumnDefinition) (string, []string) {
+	targetType, warnings := mapTDengineColumnToPGLike(col)
+	parts := []string{targetType}
+	if strings.EqualFold(strings.TrimSpace(col.Nullable), "NO") {
+		parts = append(parts, "NOT NULL")
+	} else {
+		parts = append(parts, "NULL")
+	}
+	return strings.Join(parts, " "), warnings
+}
+
+func tdengineSemanticWarnings(sourceCols []connection.ColumnDefinition) []string {
+	warnings := []string{"TDengine 到关系型目标库当前仅迁移列与数据；超级表、TAG 关联、保留策略等时序语义会降级或丢失"}
+	for _, col := range sourceCols {
+		if isTDengineTagColumn(col) {
+			warnings = append(warnings, fmt.Sprintf("字段 %s 为 TDengine TAG 列，迁移到关系型目标后将降级为普通字段", col.Name))
+		}
+	}
+	return dedupeStrings(warnings)
+}
+
+func isTDengineTagColumn(col connection.ColumnDefinition) bool {
+	return strings.EqualFold(strings.TrimSpace(col.Key), "TAG") || strings.Contains(strings.ToUpper(strings.TrimSpace(col.Extra)), "TAG")
+}
+
+func parseTDengineType(raw string) (string, int) {
+	cleaned := strings.TrimSpace(strings.ToUpper(raw))
+	if cleaned == "" {
+		return "", 0
+	}
+	base := cleaned
+	length := 0
+	if idx := strings.Index(base, "("); idx >= 0 {
+		end := strings.Index(base[idx+1:], ")")
+		if end >= 0 {
+			lengthText := strings.TrimSpace(base[idx+1 : idx+1+end])
+			if v, err := strconv.Atoi(lengthText); err == nil {
+				length = v
+			}
+		}
+		base = strings.TrimSpace(base[:idx])
+	}
+	return base, length
+}
+
+func mapTDengineColumnToMySQL(col connection.ColumnDefinition) (string, []string) {
+	base, length := parseTDengineType(col.Type)
+	warnings := make([]string, 0)
+	if isTDengineTagColumn(col) {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 为 TDengine TAG 列，已按普通列映射", col.Name))
+	}
+	switch base {
+	case "BOOL", "BOOLEAN":
+		return "tinyint(1)", warnings
+	case "TINYINT":
+		return "tinyint", warnings
+	case "UTINYINT":
+		return "tinyint unsigned", warnings
+	case "SMALLINT":
+		return "smallint", warnings
+	case "USMALLINT":
+		return "smallint unsigned", warnings
+	case "INT", "INTEGER":
+		return "int", warnings
+	case "UINT":
+		return "int unsigned", warnings
+	case "BIGINT":
+		return "bigint", warnings
+	case "UBIGINT":
+		return "bigint unsigned", warnings
+	case "FLOAT":
+		return "float", warnings
+	case "DOUBLE":
+		return "double", warnings
+	case "DECIMAL", "NUMERIC":
+		if length > 0 {
+			return strings.ToLower(strings.TrimSpace(col.Type)), warnings
+		}
+		return "decimal(38,10)", warnings
+	case "TIMESTAMP":
+		return "datetime", warnings
+	case "DATE":
+		return "date", warnings
+	case "JSON":
+		return "json", warnings
+	case "BINARY", "NCHAR", "VARCHAR", "VARBINARY":
+		if length > 0 && length <= 65535 {
+			return fmt.Sprintf("varchar(%d)", length), warnings
+		}
+		return "text", warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门 MySQL 映射，已降级为 text", col.Name, col.Type))
+		return "text", warnings
+	}
+}
+
+func mapTDengineColumnToPGLike(col connection.ColumnDefinition) (string, []string) {
+	base, length := parseTDengineType(col.Type)
+	warnings := make([]string, 0)
+	if isTDengineTagColumn(col) {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 为 TDengine TAG 列，已按普通列映射", col.Name))
+	}
+	switch base {
+	case "BOOL", "BOOLEAN":
+		return "boolean", warnings
+	case "TINYINT", "UTINYINT", "SMALLINT":
+		return "smallint", warnings
+	case "USMALLINT", "INT", "INTEGER":
+		return "integer", warnings
+	case "UINT", "BIGINT":
+		return "bigint", warnings
+	case "UBIGINT":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 UBIGINT 已映射为 numeric(20,0) 以避免无符号溢出", col.Name))
+		return "numeric(20,0)", warnings
+	case "FLOAT":
+		return "real", warnings
+	case "DOUBLE":
+		return "double precision", warnings
+	case "DECIMAL", "NUMERIC":
+		if length > 0 {
+			return strings.ToLower(strings.TrimSpace(col.Type)), warnings
+		}
+		return "numeric(38,10)", warnings
+	case "TIMESTAMP":
+		return "timestamp", warnings
+	case "DATE":
+		return "date", warnings
+	case "JSON":
+		return "jsonb", warnings
+	case "BINARY", "NCHAR", "VARCHAR", "VARBINARY":
+		if length > 0 {
+			return fmt.Sprintf("varchar(%d)", length), warnings
+		}
+		return "text", warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门 PG-like 映射，已降级为 text", col.Name, col.Type))
+		return "text", warnings
+	}
+}

internal/sync/migration_tdengine_target.go

@@ -0,0 +1,657 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type mySQLLikeToTDenginePlanner struct{}
+
+type pgLikeToTDenginePlanner struct{}
+
+type clickHouseToTDenginePlanner struct{}
+
+type tdengineToTDenginePlanner struct{}
+
+func (mySQLLikeToTDenginePlanner) Name() string { return "mysqllike-tdengine-planner" }
+
+func (mySQLLikeToTDenginePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isMySQLLikeSourceType(sourceType) && targetType == "tdengine" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (mySQLLikeToTDenginePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildMySQLLikeToTDenginePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (pgLikeToTDenginePlanner) Name() string { return "pglike-tdengine-planner" }
+
+func (pgLikeToTDenginePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if isPGLikeSource(sourceType) && targetType == "tdengine" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (pgLikeToTDenginePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildPGLikeToTDenginePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func buildMySQLLikeToTDenginePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildSourceToTDenginePlan(config, tableName, sourceDB, targetDB, isMySQLLikeTDengineTimestampCandidate, buildMySQLLikeToTDengineCreateTableSQL)
+}
+
+func buildPGLikeToTDenginePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildSourceToTDenginePlan(config, tableName, sourceDB, targetDB, isPGLikeTDengineTimestampCandidate, buildPGLikeToTDengineCreateTableSQL)
+}
+
+func buildClickHouseToTDenginePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildSourceToTDenginePlan(config, tableName, sourceDB, targetDB, isClickHouseTDengineTimestampCandidate, buildClickHouseToTDengineCreateTableSQL)
+}
+
+func buildTDengineToTDenginePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildSourceToTDenginePlan(config, tableName, sourceDB, targetDB, isTDengineTDengineTimestampCandidate, buildTDengineToTDengineCreateTableSQL)
+}
+
+func (clickHouseToTDenginePlanner) Name() string { return "clickhouse-tdengine-planner" }
+
+func (clickHouseToTDenginePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "clickhouse" && targetType == "tdengine" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (clickHouseToTDenginePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildClickHouseToTDenginePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+func (tdengineToTDenginePlanner) Name() string { return "tdengine-tdengine-planner" }
+
+func (tdengineToTDenginePlanner) SupportLevel(ctx MigrationBuildContext) MigrationSupportLevel {
+	sourceType := resolveMigrationDBType(ctx.Config.SourceConfig)
+	targetType := resolveMigrationDBType(ctx.Config.TargetConfig)
+	if sourceType == "tdengine" && targetType == "tdengine" {
+		return MigrationSupportLevelFull
+	}
+	return MigrationSupportLevelUnsupported
+}
+
+func (tdengineToTDenginePlanner) BuildPlan(ctx MigrationBuildContext) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	return buildTDengineToTDenginePlan(ctx.Config, ctx.TableName, ctx.SourceDB, ctx.TargetDB)
+}
+
+type tdengineTimestampCandidate func(connection.ColumnDefinition) bool
+
+type tdengineCreateTableBuilder func(string, []connection.ColumnDefinition, int) (string, []string, []string)
+
+func buildSourceToTDenginePlan(config SyncConfig, tableName string, sourceDB db.Database, targetDB db.Database, isTimestamp tdengineTimestampCandidate, buildCreateSQL tdengineCreateTableBuilder) (SchemaMigrationPlan, []connection.ColumnDefinition, []connection.ColumnDefinition, error) {
+	plan := SchemaMigrationPlan{}
+	sourceType := resolveMigrationDBType(config.SourceConfig)
+	targetType := resolveMigrationDBType(config.TargetConfig)
+	plan.SourceSchema, plan.SourceTable = normalizeSchemaAndTable(sourceType, config.SourceConfig.Database, tableName)
+	plan.TargetSchema, plan.TargetTable = normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	plan.SourceQueryTable = qualifiedNameForQuery(sourceType, plan.SourceSchema, plan.SourceTable, tableName)
+	plan.TargetQueryTable = qualifiedNameForQuery(targetType, plan.TargetSchema, plan.TargetTable, tableName)
+	plan.PlannedAction = "使用已有目标表导入"
+
+	sourceCols, sourceExists, err := inspectTableColumns(sourceDB, plan.SourceSchema, plan.SourceTable)
+	if err != nil {
+		return plan, nil, nil, fmt.Errorf("获取源表字段失败: %w", err)
+	}
+	if !sourceExists {
+		return plan, nil, nil, fmt.Errorf("源表不存在或无列定义: %s", tableName)
+	}
+
+	plan.Warnings = append(plan.Warnings, tdengineTargetBaseWarnings()...)
+	timestampIndex := findTDengineTimestampColumn(sourceCols, isTimestamp)
+	if timestampIndex < 0 {
+		plan.Warnings = append(plan.Warnings, tdengineTargetMissingTimeWarning())
+	}
+
+	targetCols, targetExists, err := inspectTableColumns(targetDB, plan.TargetSchema, plan.TargetTable)
+	if err != nil {
+		return plan, sourceCols, nil, fmt.Errorf("获取目标表字段失败: %w", err)
+	}
+	plan.TargetTableExists = targetExists
+
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
+	if targetExists {
+		missing := diffMissingColumnNames(sourceCols, targetCols)
+		if len(missing) > 0 {
+			plan.Warnings = append(plan.Warnings, fmt.Sprintf("目标表缺失字段 %d 个：%s", len(missing), strings.Join(missing, ", ")))
+		}
+		if strategy != "existing_only" {
+			plan.Warnings = append(plan.Warnings, "TDengine 目标端当前不自动补齐已有目标表字段，请先确认目标表结构")
+		}
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+
+	switch strategy {
+	case "existing_only":
+		plan.PlannedAction = "目标表不存在，需先手工创建"
+		plan.Warnings = append(plan.Warnings, "当前策略要求目标表已存在，执行时不会自动建表")
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	case "smart", "auto_create_if_missing":
+		if timestampIndex < 0 {
+			plan.PlannedAction = "源表未识别到可映射为 TDengine 首列的时间列，无法自动建表"
+			plan.UnsupportedObjects = append(plan.UnsupportedObjects, "TDengine regular table 首列必须为 TIMESTAMP，当前源表缺少可直接映射的时间列")
+			return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+		}
+		plan.AutoCreate = true
+		plan.PlannedAction = "目标表不存在，将自动建表后导入"
+		createSQL, warnings, unsupported := buildCreateSQL(plan.TargetQueryTable, sourceCols, timestampIndex)
+		plan.CreateTableSQL = createSQL
+		plan.Warnings = append(plan.Warnings, warnings...)
+		plan.UnsupportedObjects = append(plan.UnsupportedObjects, unsupported...)
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	default:
+		return dedupeSchemaMigrationPlan(plan), sourceCols, targetCols, nil
+	}
+}
+
+func tdengineTargetBaseWarnings() []string {
+	return []string{
+		"TDengine 目标端当前仅支持 INSERT 写入；若存在差异 update/delete，执行期会被拒绝",
+		"TDengine 目标端 auto-create 当前仅创建基础表；索引、外键、触发器、supertable/TAGS/TTL 不会自动迁移",
+	}
+}
+
+func tdengineTargetMissingTimeWarning() string {
+	return "源表缺少可映射的时间列，自动建表将不可用；如需继续，请先人工准备 TDengine 目标表与时间列"
+}
+
+func findTDengineTimestampColumn(sourceCols []connection.ColumnDefinition, candidate tdengineTimestampCandidate) int {
+	preferred := []string{"ts", "timestamp", "event_time", "eventtime", "created_at", "create_time", "occurred_at"}
+	for _, name := range preferred {
+		for idx, col := range sourceCols {
+			if !candidate(col) {
+				continue
+			}
+			if strings.EqualFold(strings.TrimSpace(col.Name), name) {
+				return idx
+			}
+		}
+	}
+	for idx, col := range sourceCols {
+		if candidate(col) {
+			return idx
+		}
+	}
+	return -1
+}
+
+func reorderTDengineColumns(sourceCols []connection.ColumnDefinition, timestampIndex int) []connection.ColumnDefinition {
+	if timestampIndex <= 0 || timestampIndex >= len(sourceCols) {
+		cloned := make([]connection.ColumnDefinition, len(sourceCols))
+		copy(cloned, sourceCols)
+		return cloned
+	}
+	ordered := make([]connection.ColumnDefinition, 0, len(sourceCols))
+	ordered = append(ordered, sourceCols[timestampIndex])
+	for idx, col := range sourceCols {
+		if idx == timestampIndex {
+			continue
+		}
+		ordered = append(ordered, col)
+	}
+	return ordered
+}
+
+func buildMySQLLikeToTDengineCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition, timestampIndex int) (string, []string, []string) {
+	ordered := reorderTDengineColumns(sourceCols, timestampIndex)
+	columnDefs := make([]string, 0, len(ordered))
+	warnings := make([]string, 0)
+	unsupported := []string{"源表索引/外键/触发器/唯一约束/自增语义当前不会自动迁移到 TDengine"}
+	if timestampIndex != 0 && timestampIndex >= 0 && timestampIndex < len(sourceCols) {
+		warnings = append(warnings, fmt.Sprintf("TDengine 基础表要求时间列优先，已将字段 %s 调整为首列", sourceCols[timestampIndex].Name))
+	}
+	for idx, col := range ordered {
+		def, colWarnings := mapMySQLLikeColumnToTDengine(col, idx == 0)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("tdengine", col.Name), def))
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType("tdengine", targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildPGLikeToTDengineCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition, timestampIndex int) (string, []string, []string) {
+	ordered := reorderTDengineColumns(sourceCols, timestampIndex)
+	columnDefs := make([]string, 0, len(ordered))
+	warnings := make([]string, 0)
+	unsupported := []string{"源表索引/外键/触发器/唯一约束/identity/sequence 语义当前不会自动迁移到 TDengine"}
+	if timestampIndex != 0 && timestampIndex >= 0 && timestampIndex < len(sourceCols) {
+		warnings = append(warnings, fmt.Sprintf("TDengine 基础表要求时间列优先，已将字段 %s 调整为首列", sourceCols[timestampIndex].Name))
+	}
+	for idx, col := range ordered {
+		def, colWarnings := mapPGLikeColumnToTDengine(col, idx == 0)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("tdengine", col.Name), def))
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType("tdengine", targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildClickHouseToTDengineCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition, timestampIndex int) (string, []string, []string) {
+	ordered := reorderTDengineColumns(sourceCols, timestampIndex)
+	columnDefs := make([]string, 0, len(ordered))
+	warnings := make([]string, 0)
+	unsupported := []string{"源表 ORDER BY/PARTITION/TTL/Projection/物化视图 语义当前不会自动迁移到 TDengine"}
+	if timestampIndex != 0 && timestampIndex >= 0 && timestampIndex < len(sourceCols) {
+		warnings = append(warnings, fmt.Sprintf("TDengine 基础表要求时间列优先，已将字段 %s 调整为首列", sourceCols[timestampIndex].Name))
+	}
+	for idx, col := range ordered {
+		def, colWarnings := mapClickHouseColumnToTDengine(col, idx == 0)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("tdengine", col.Name), def))
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType("tdengine", targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func buildTDengineToTDengineCreateTableSQL(targetQueryTable string, sourceCols []connection.ColumnDefinition, timestampIndex int) (string, []string, []string) {
+	ordered := reorderTDengineColumns(sourceCols, timestampIndex)
+	columnDefs := make([]string, 0, len(ordered))
+	warnings := make([]string, 0)
+	unsupported := []string{"源表 supertable/TAGS/TTL/保留策略/索引 语义当前不会自动迁移到 TDengine regular table"}
+	if timestampIndex != 0 && timestampIndex >= 0 && timestampIndex < len(sourceCols) {
+		warnings = append(warnings, fmt.Sprintf("TDengine 基础表要求时间列优先，已将字段 %s 调整为首列", sourceCols[timestampIndex].Name))
+	}
+	for idx, col := range ordered {
+		def, colWarnings := mapTDengineColumnToTDengine(col, idx == 0)
+		warnings = append(warnings, colWarnings...)
+		columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdentByType("tdengine", col.Name), def))
+	}
+	createSQL := fmt.Sprintf("CREATE TABLE %s (\n  %s\n)", quoteQualifiedIdentByType("tdengine", targetQueryTable), strings.Join(columnDefs, ",\n  "))
+	return createSQL, dedupeStrings(warnings), dedupeStrings(unsupported)
+}
+
+func isMySQLLikeTDengineTimestampCandidate(col connection.ColumnDefinition) bool {
+	raw := strings.ToLower(strings.TrimSpace(col.Type))
+	clean := strings.ReplaceAll(raw, " unsigned", "")
+	clean = strings.ReplaceAll(clean, " zerofill", "")
+	return strings.HasPrefix(clean, "timestamp") || strings.HasPrefix(clean, "datetime")
+}
+
+func isPGLikeTDengineTimestampCandidate(col connection.ColumnDefinition) bool {
+	raw := strings.ToLower(strings.TrimSpace(col.Type))
+	return strings.HasPrefix(raw, "timestamp")
+}
+
+func isClickHouseTDengineTimestampCandidate(col connection.ColumnDefinition) bool {
+	lower, _ := unwrapClickHouseTDengineType(col.Type)
+	return strings.HasPrefix(lower, "datetime")
+}
+
+func isTDengineTDengineTimestampCandidate(col connection.ColumnDefinition) bool {
+	base, _ := parseTDengineType(col.Type)
+	return base == "TIMESTAMP"
+}
+
+func mapMySQLLikeColumnToTDengine(col connection.ColumnDefinition, forceTimestamp bool) (string, []string) {
+	warnings := make([]string, 0)
+	if forceTimestamp {
+		if !isMySQLLikeTDengineTimestampCandidate(col) {
+			warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已提升为 TDengine 首列 TIMESTAMP", col.Name, col.Type))
+		}
+		return "TIMESTAMP", warnings
+	}
+
+	raw := strings.ToLower(strings.TrimSpace(col.Type))
+	if raw == "" {
+		return "VARCHAR(1024)", []string{fmt.Sprintf("字段 %s 类型为空，已降级为 VARCHAR(1024)", col.Name)}
+	}
+	unsigned := strings.Contains(raw, "unsigned")
+	clean := strings.ReplaceAll(raw, " unsigned", "")
+	clean = strings.ReplaceAll(clean, " zerofill", "")
+	isAutoIncrement := strings.Contains(strings.ToLower(strings.TrimSpace(col.Extra)), "auto_increment")
+	if isAutoIncrement {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 自增语义不会迁移到 TDengine", col.Name))
+	}
+	if col.Key == "PRI" || col.Key == "PK" {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 主键语义不会按关系型约束迁移到 TDengine", col.Name))
+	}
+
+	switch {
+	case strings.HasPrefix(clean, "tinyint(1)") && !unsigned && !isAutoIncrement:
+		return "BOOL", warnings
+	case strings.HasPrefix(clean, "tinyint"):
+		if unsigned {
+			return "UTINYINT", warnings
+		}
+		return "TINYINT", warnings
+	case strings.HasPrefix(clean, "smallint"):
+		if unsigned {
+			return "USMALLINT", warnings
+		}
+		return "SMALLINT", warnings
+	case strings.HasPrefix(clean, "mediumint"), strings.HasPrefix(clean, "int"), strings.HasPrefix(clean, "integer"):
+		if unsigned {
+			return "UINT", warnings
+		}
+		return "INT", warnings
+	case strings.HasPrefix(clean, "bigint"):
+		if unsigned {
+			return "UBIGINT", warnings
+		}
+		return "BIGINT", warnings
+	case strings.HasPrefix(clean, "decimal"), strings.HasPrefix(clean, "numeric"):
+		return normalizeTDengineDecimalType(clean), warnings
+	case strings.HasPrefix(clean, "float"):
+		return "FLOAT", warnings
+	case strings.HasPrefix(clean, "double"):
+		return "DOUBLE", warnings
+	case strings.HasPrefix(clean, "date"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 date 已降级映射为 TIMESTAMP", col.Name))
+		return "TIMESTAMP", warnings
+	case strings.HasPrefix(clean, "timestamp"), strings.HasPrefix(clean, "datetime"):
+		return "TIMESTAMP", warnings
+	case strings.HasPrefix(clean, "time"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无稳定 TDengine 时间-only 映射，已降级为 VARCHAR(64)", col.Name, col.Type))
+		return "VARCHAR(64)", warnings
+	case strings.HasPrefix(clean, "char("), strings.HasPrefix(clean, "varchar("):
+		return fmt.Sprintf("VARCHAR(%d)", normalizeTDengineVarcharLength(extractFirstTypeLength(clean), 255)), warnings
+	case strings.HasPrefix(clean, "tinytext"), strings.HasPrefix(clean, "text"), strings.HasPrefix(clean, "mediumtext"), strings.HasPrefix(clean, "longtext"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 VARCHAR(4096)", col.Name, col.Type))
+		return "VARCHAR(4096)", warnings
+	case strings.HasPrefix(clean, "json"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 因 TDengine JSON 仅适用于 TAG，已降级为 VARCHAR(4096)", col.Name, col.Type))
+		return "VARCHAR(4096)", warnings
+	case strings.HasPrefix(clean, "enum"), strings.HasPrefix(clean, "set"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 VARCHAR(255)", col.Name, col.Type))
+		return "VARCHAR(255)", warnings
+	case strings.HasPrefix(clean, "binary"), strings.HasPrefix(clean, "varbinary"), strings.HasPrefix(clean, "tinyblob"), strings.HasPrefix(clean, "blob"), strings.HasPrefix(clean, "mediumblob"), strings.HasPrefix(clean, "longblob"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已按字符串语义降级为 VARCHAR(4096)", col.Name, col.Type))
+		return "VARCHAR(4096)", warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门 TDengine 映射，已降级为 VARCHAR(1024)", col.Name, col.Type))
+		return "VARCHAR(1024)", warnings
+	}
+}
+
+func mapPGLikeColumnToTDengine(col connection.ColumnDefinition, forceTimestamp bool) (string, []string) {
+	warnings := make([]string, 0)
+	if forceTimestamp {
+		if raw := strings.ToLower(strings.TrimSpace(col.Type)); !strings.HasPrefix(raw, "timestamp") {
+			warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已提升为 TDengine 首列 TIMESTAMP", col.Name, col.Type))
+		}
+		return "TIMESTAMP", warnings
+	}
+
+	raw := strings.ToLower(strings.TrimSpace(col.Type))
+	if raw == "" {
+		return "VARCHAR(1024)", []string{fmt.Sprintf("字段 %s 类型为空，已降级为 VARCHAR(1024)", col.Name)}
+	}
+	if col.Key == "PRI" || col.Key == "PK" {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 主键语义不会按关系型约束迁移到 TDengine", col.Name))
+	}
+	if strings.Contains(strings.ToLower(strings.TrimSpace(col.Extra)), "identity") || strings.Contains(strings.ToLower(strings.TrimSpace(col.Extra)), "auto_increment") {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 自增/identity 语义不会迁移到 TDengine", col.Name))
+	}
+
+	switch {
+	case raw == "boolean" || strings.HasPrefix(raw, "bool"):
+		return "BOOL", warnings
+	case raw == "smallint":
+		return "SMALLINT", warnings
+	case raw == "integer" || raw == "int4":
+		return "INT", warnings
+	case raw == "bigint" || raw == "int8":
+		return "BIGINT", warnings
+	case strings.HasPrefix(raw, "numeric"), strings.HasPrefix(raw, "decimal"):
+		return normalizeTDengineDecimalType(raw), warnings
+	case raw == "real" || raw == "float4":
+		return "FLOAT", warnings
+	case raw == "double precision" || raw == "float8":
+		return "DOUBLE", warnings
+	case raw == "date":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 date 已降级映射为 TIMESTAMP", col.Name))
+		return "TIMESTAMP", warnings
+	case strings.HasPrefix(raw, "timestamp"):
+		return "TIMESTAMP", warnings
+	case strings.HasPrefix(raw, "time"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无稳定 TDengine 时间-only 映射，已降级为 VARCHAR(64)", col.Name, col.Type))
+		return "VARCHAR(64)", warnings
+	case strings.HasPrefix(raw, "character varying("), strings.HasPrefix(raw, "varchar("), strings.HasPrefix(raw, "character("), strings.HasPrefix(raw, "char("):
+		return fmt.Sprintf("VARCHAR(%d)", normalizeTDengineVarcharLength(extractFirstTypeLength(raw), 255)), warnings
+	case raw == "text":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 text 已降级为 VARCHAR(4096)", col.Name))
+		return "VARCHAR(4096)", warnings
+	case raw == "uuid":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 uuid 已降级为 VARCHAR(36)", col.Name))
+		return "VARCHAR(36)", warnings
+	case raw == "json" || raw == "jsonb":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 因 TDengine JSON 仅适用于 TAG，已降级为 VARCHAR(4096)", col.Name, col.Type))
+		return "VARCHAR(4096)", warnings
+	case raw == "bytea":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 bytea 已按字符串语义降级为 VARCHAR(4096)", col.Name))
+		return "VARCHAR(4096)", warnings
+	case strings.HasSuffix(raw, "[]") || strings.HasPrefix(raw, "array"):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 VARCHAR(4096)", col.Name, col.Type))
+		return "VARCHAR(4096)", warnings
+	case raw == "user-defined":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 为用户自定义类型，已降级为 VARCHAR(1024)", col.Name))
+		return "VARCHAR(1024)", warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门 TDengine 映射，已降级为 VARCHAR(1024)", col.Name, col.Type))
+		return "VARCHAR(1024)", warnings
+	}
+}
+
+func mapClickHouseColumnToTDengine(col connection.ColumnDefinition, forceTimestamp bool) (string, []string) {
+	warnings := make([]string, 0)
+	if forceTimestamp {
+		if !isClickHouseTDengineTimestampCandidate(col) {
+			warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已提升为 TDengine 首列 TIMESTAMP", col.Name, col.Type))
+		}
+		return "TIMESTAMP", warnings
+	}
+
+	lower, _ := unwrapClickHouseTDengineType(col.Type)
+	if lower == "" {
+		return "VARCHAR(1024)", []string{fmt.Sprintf("字段 %s 类型为空，已降级为 VARCHAR(1024)", col.Name)}
+	}
+
+	switch {
+	case lower == "bool" || lower == "boolean":
+		return "BOOL", warnings
+	case lower == "int8":
+		return "TINYINT", warnings
+	case lower == "uint8":
+		return "UTINYINT", warnings
+	case lower == "int16":
+		return "SMALLINT", warnings
+	case lower == "uint16":
+		return "USMALLINT", warnings
+	case lower == "int32":
+		return "INT", warnings
+	case lower == "uint32":
+		return "UINT", warnings
+	case lower == "int64":
+		return "BIGINT", warnings
+	case lower == "uint64":
+		return "UBIGINT", warnings
+	case lower == "float32":
+		return "FLOAT", warnings
+	case lower == "float64":
+		return "DOUBLE", warnings
+	case lower == "date":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 date 已降级映射为 TIMESTAMP", col.Name))
+		return "TIMESTAMP", warnings
+	case strings.HasPrefix(lower, "datetime"):
+		return "TIMESTAMP", warnings
+	case lower == "string":
+		return "VARCHAR(1024)", warnings
+	case lower == "uuid":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 uuid 已降级为 VARCHAR(36)", col.Name))
+		return "VARCHAR(36)", warnings
+	case lower == "json", strings.HasPrefix(lower, "map("), strings.HasPrefix(lower, "array("), strings.HasPrefix(lower, "tuple("), strings.HasPrefix(lower, "nested("):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已降级为 VARCHAR(4096)", col.Name, col.Type))
+		return "VARCHAR(4096)", warnings
+	case strings.HasPrefix(lower, "enum8("), strings.HasPrefix(lower, "enum16("):
+		warnings = append(warnings, fmt.Sprintf("字段 %s 枚举类型 %s 已降级为 VARCHAR(255)", col.Name, col.Type))
+		return "VARCHAR(255)", warnings
+	case clickHouseDecimalPattern.MatchString(lower):
+		parts := clickHouseDecimalPattern.FindStringSubmatch(lower)
+		return fmt.Sprintf("DECIMAL(%s,%s)", parts[2], parts[3]), warnings
+	case clickHouseStringArgsPattern.MatchString(lower):
+		parts := clickHouseStringArgsPattern.FindStringSubmatch(lower)
+		length, err := strconv.Atoi(parts[1])
+		if err != nil {
+			warnings = append(warnings, fmt.Sprintf("字段 %s FixedString 长度解析失败，已降级为 VARCHAR(255)", col.Name))
+			return "VARCHAR(255)", warnings
+		}
+		return fmt.Sprintf("VARCHAR(%d)", normalizeTDengineVarcharLength(length, 255)), warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门 TDengine 映射，已降级为 VARCHAR(1024)", col.Name, col.Type))
+		return "VARCHAR(1024)", warnings
+	}
+}
+
+func mapTDengineColumnToTDengine(col connection.ColumnDefinition, forceTimestamp bool) (string, []string) {
+	warnings := make([]string, 0)
+	if forceTimestamp {
+		if !isTDengineTDengineTimestampCandidate(col) {
+			warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 已提升为 TDengine 首列 TIMESTAMP", col.Name, col.Type))
+		}
+		return "TIMESTAMP", warnings
+	}
+
+	base, length := parseTDengineType(col.Type)
+	if base == "" {
+		return "VARCHAR(1024)", []string{fmt.Sprintf("字段 %s 类型为空，已降级为 VARCHAR(1024)", col.Name)}
+	}
+	if isTDengineTagColumn(col) {
+		warnings = append(warnings, fmt.Sprintf("字段 %s 为 TDengine TAG 列，迁移到 regular table 后将降级为普通字段", col.Name))
+	}
+
+	switch base {
+	case "BOOL", "BOOLEAN":
+		return "BOOL", warnings
+	case "TINYINT":
+		return "TINYINT", warnings
+	case "UTINYINT":
+		return "UTINYINT", warnings
+	case "SMALLINT":
+		return "SMALLINT", warnings
+	case "USMALLINT":
+		return "USMALLINT", warnings
+	case "INT", "INTEGER":
+		return "INT", warnings
+	case "UINT":
+		return "UINT", warnings
+	case "BIGINT":
+		return "BIGINT", warnings
+	case "UBIGINT":
+		return "UBIGINT", warnings
+	case "FLOAT":
+		return "FLOAT", warnings
+	case "DOUBLE":
+		return "DOUBLE", warnings
+	case "DECIMAL", "NUMERIC":
+		return normalizeTDengineDecimalType(col.Type), warnings
+	case "TIMESTAMP":
+		return "TIMESTAMP", warnings
+	case "DATE":
+		return "DATE", warnings
+	case "JSON":
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 JSON 在 TDengine regular table 中不保留 TAG 语义，已降级为 VARCHAR(4096)", col.Name))
+		return "VARCHAR(4096)", warnings
+	case "BINARY", "NCHAR", "VARCHAR", "VARBINARY":
+		if length > 0 {
+			return fmt.Sprintf("%s(%d)", base, normalizeTDengineVarcharLength(length, length)), warnings
+		}
+		fallback := 255
+		if base == "VARCHAR" {
+			fallback = 1024
+		}
+		return fmt.Sprintf("%s(%d)", base, fallback), warnings
+	default:
+		warnings = append(warnings, fmt.Sprintf("字段 %s 类型 %s 暂无专门 TDengine 同库映射，已降级为 VARCHAR(1024)", col.Name, col.Type))
+		return "VARCHAR(1024)", warnings
+	}
+}
+
+func unwrapClickHouseTDengineType(raw string) (string, bool) {
+	text := strings.TrimSpace(raw)
+	lower := strings.ToLower(text)
+	nullable := false
+	for {
+		switched := false
+		if strings.HasPrefix(lower, "nullable(") && strings.HasSuffix(lower, ")") {
+			text = strings.TrimSpace(text[len("Nullable(") : len(text)-1])
+			lower = strings.ToLower(text)
+			nullable = true
+			switched = true
+		}
+		if strings.HasPrefix(lower, "lowcardinality(") && strings.HasSuffix(lower, ")") {
+			text = strings.TrimSpace(text[len("LowCardinality(") : len(text)-1])
+			lower = strings.ToLower(text)
+			switched = true
+		}
+		if !switched {
+			break
+		}
+	}
+	return lower, nullable
+}
+
+func normalizeTDengineDecimalType(raw string) string {
+	text := strings.TrimSpace(raw)
+	if text == "" {
+		return "DECIMAL(38,10)"
+	}
+	lower := strings.ToLower(text)
+	if strings.HasPrefix(lower, "numeric") {
+		return "DECIMAL" + text[len("numeric"):]
+	}
+	if strings.HasPrefix(lower, "decimal") {
+		return "DECIMAL" + text[len("decimal"):]
+	}
+	return "DECIMAL(38,10)"
+}
+
+func normalizeTDengineVarcharLength(length int, fallback int) int {
+	if fallback <= 0 {
+		fallback = 255
+	}
+	if length <= 0 {
+		return fallback
+	}
+	if length > 16384 {
+		return 16384
+	}
+	return length
+}
+
+func extractFirstTypeLength(raw string) int {
+	start := strings.Index(raw, "(")
+	if start < 0 {
+		return 0
+	}
+	end := strings.Index(raw[start+1:], ")")
+	if end < 0 {
+		return 0
+	}
+	inside := strings.TrimSpace(raw[start+1 : start+1+end])
+	if inside == "" {
+		return 0
+	}
+	parts := strings.SplitN(inside, ",", 2)
+	length, err := strconv.Atoi(strings.TrimSpace(parts[0]))
+	if err != nil {
+		return 0
+	}
+	return length
+}

internal/sync/migration_type_resolver.go

@@ -0,0 +1,98 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"strings"
+)
+
+func normalizeMigrationDBType(dbType string) string {
+	normalized := strings.ToLower(strings.TrimSpace(dbType))
+	switch normalized {
+	case "doris":
+		return "diros"
+	case "postgresql":
+		return "postgres"
+	case "dm", "dm8":
+		return "dameng"
+	case "sqlite3":
+		return "sqlite"
+	default:
+		return normalized
+	}
+}
+
+func resolveMigrationDBType(config connection.ConnectionConfig) string {
+	dbType := normalizeMigrationDBType(config.Type)
+	if dbType != "custom" {
+		return dbType
+	}
+
+	driver := strings.ToLower(strings.TrimSpace(config.Driver))
+	switch driver {
+	case "postgresql", "postgres", "pg", "pq", "pgx":
+		return "postgres"
+	case "dm", "dameng", "dm8":
+		return "dameng"
+	case "sqlite3", "sqlite":
+		return "sqlite"
+	case "sphinxql":
+		return "sphinx"
+	case "diros", "doris":
+		return "diros"
+	case "kingbase", "kingbase8", "kingbasees", "kingbasev8":
+		return "kingbase"
+	case "highgo":
+		return "highgo"
+	case "vastbase":
+		return "vastbase"
+	case "mysql", "mysql2":
+		return "mysql"
+	case "mariadb":
+		return "mariadb"
+	}
+
+	switch {
+	case strings.Contains(driver, "postgres"):
+		return "postgres"
+	case strings.Contains(driver, "kingbase"):
+		return "kingbase"
+	case strings.Contains(driver, "highgo"):
+		return "highgo"
+	case strings.Contains(driver, "vastbase"):
+		return "vastbase"
+	case strings.Contains(driver, "sqlite"):
+		return "sqlite"
+	case strings.Contains(driver, "sphinx"):
+		return "sphinx"
+	case strings.Contains(driver, "diros"), strings.Contains(driver, "doris"):
+		return "diros"
+	case strings.Contains(driver, "maria"):
+		return "mariadb"
+	case strings.Contains(driver, "mysql"):
+		return "mysql"
+	case strings.Contains(driver, "dameng"), strings.Contains(driver, "dm"):
+		return "dameng"
+	default:
+		return normalizeMigrationDBType(driver)
+	}
+}
+
+func isMySQLCoreType(dbType string) bool {
+	switch normalizeMigrationDBType(dbType) {
+	case "mysql", "mariadb", "diros":
+		return true
+	default:
+		return false
+	}
+}
+
+func isMySQLLikeSourceType(dbType string) bool {
+	if isMySQLCoreType(dbType) {
+		return true
+	}
+	return normalizeMigrationDBType(dbType) == "sphinx"
+}
+
+func isMySQLLikeWritableTargetType(dbType string) bool {
+	return isMySQLCoreType(dbType)
+}

internal/sync/preview.go

@@ -1,7 +1,7 @@
 package sync
 
 import (
-	"GoNavi-Wails/internal/db"
+	"errors"
 	"fmt"
 	"strings"
 )
@@ -36,12 +36,18 @@ func (s *SyncEngine) Preview(config SyncConfig, tableName string, limit int) (Ta
 	if limit > 500 {
 		limit = 500
 	}
+	if isRedisToMongoKeyspacePair(config) {
+		return s.previewRedisToMongo(config, tableName, limit)
+	}
+	if isMongoToRedisKeyspacePair(config) {
+		return s.previewMongoToRedis(config, tableName, limit)
+	}
 
-	sourceDB, err := db.NewDatabase(config.SourceConfig.Type)
+	sourceDB, err := newSyncDatabase(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)
+	targetDB, err := newSyncDatabase(config.TargetConfig.Type)
 	if err != nil {
 		return TableDiffPreview{}, fmt.Errorf("初始化目标数据库驱动失败: %w", err)
 	}
@@ -56,14 +62,12 @@ func (s *SyncEngine) Preview(config SyncConfig, tableName string, limit int) (Ta
 	}
 	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)
+	plan, cols, _, err := buildSchemaMigrationPlan(config, tableName, sourceDB, targetDB)
 	if err != nil {
-		return TableDiffPreview{}, fmt.Errorf("获取源表字段失败: %w", err)
+		return TableDiffPreview{}, err
+	}
+	if !plan.TargetTableExists && !plan.AutoCreate {
+		return TableDiffPreview{}, errors.New(firstNonEmpty(plan.PlannedAction, "目标表不存在，无法预览差异"))
 	}
 
 	pkCols := make([]string, 0, 2)
@@ -80,13 +84,17 @@ func (s *SyncEngine) Preview(config SyncConfig, tableName string, limit int) (Ta
 	}
 	pkCol := pkCols[0]
 
-	sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.SourceConfig.Type, sourceQueryTable)))
+	sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(resolveMigrationDBType(config.SourceConfig), plan.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)
+
+	targetRows := make([]map[string]interface{}, 0)
+	if plan.TargetTableExists {
+		targetRows, _, err = targetDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(resolveMigrationDBType(config.TargetConfig), plan.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))
@@ -133,12 +141,7 @@ func (s *SyncEngine) Preview(config SyncConfig, tableName string, limit int) (Ta
 			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,
-					})
+					out.Updates = append(out.Updates, PreviewUpdateRow{PK: pkVal, ChangedColumns: changedColumns, Source: sRow, Target: tRow})
 				}
 			}
 			continue

internal/sync/redis_migration_test.go

@@ -0,0 +1,490 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"GoNavi-Wails/internal/db"
+	redispkg "GoNavi-Wails/internal/redis"
+	"fmt"
+	"sort"
+	"strings"
+	"testing"
+)
+
+type fakeRedisMigrationClient struct {
+	values        map[string]*redispkg.RedisValue
+	scannedKeys   []string
+	connectConfig connection.ConnectionConfig
+	closed        bool
+}
+
+func (f *fakeRedisMigrationClient) Connect(config connection.ConnectionConfig) error {
+	f.connectConfig = config
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) Close() error {
+	f.closed = true
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) ScanKeys(pattern string, cursor uint64, count int64) (*redispkg.RedisScanResult, error) {
+	items := make([]redispkg.RedisKeyInfo, 0, len(f.scannedKeys))
+	for _, key := range f.scannedKeys {
+		items = append(items, redispkg.RedisKeyInfo{Key: key, Type: "string", TTL: -1})
+	}
+	return &redispkg.RedisScanResult{Keys: items, Cursor: "0"}, nil
+}
+
+func (f *fakeRedisMigrationClient) GetKeyType(key string) (string, error) {
+	if value, ok := f.values[key]; ok && value != nil {
+		return value.Type, nil
+	}
+	return "none", nil
+}
+
+func (f *fakeRedisMigrationClient) GetValue(key string) (*redispkg.RedisValue, error) {
+	if value, ok := f.values[key]; ok {
+		return value, nil
+	}
+	return nil, fmt.Errorf("key not found: %s", key)
+}
+
+func (f *fakeRedisMigrationClient) DeleteKeys(keys []string) (int64, error) {
+	var deleted int64
+	for _, key := range keys {
+		if _, ok := f.values[key]; ok {
+			delete(f.values, key)
+			deleted++
+		}
+	}
+	return deleted, nil
+}
+
+func (f *fakeRedisMigrationClient) SetTTL(key string, ttl int64) error {
+	value, ok := f.values[key]
+	if !ok {
+		return nil
+	}
+	value.TTL = ttl
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) SetString(key, value string, ttl int64) error {
+	if f.values == nil {
+		f.values = map[string]*redispkg.RedisValue{}
+	}
+	f.values[key] = &redispkg.RedisValue{Type: "string", TTL: ttl, Value: value, Length: int64(len(value))}
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) SetHashField(key, field, value string) error {
+	if f.values == nil {
+		f.values = map[string]*redispkg.RedisValue{}
+	}
+	current, ok := f.values[key]
+	if !ok || current == nil || current.Type != "hash" {
+		current = &redispkg.RedisValue{Type: "hash", TTL: -1, Value: map[string]string{}}
+		f.values[key] = current
+	}
+	hash, _ := current.Value.(map[string]string)
+	if hash == nil {
+		hash = map[string]string{}
+	}
+	hash[field] = value
+	current.Value = hash
+	current.Length = int64(len(hash))
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) ListPush(key string, values ...string) error {
+	if f.values == nil {
+		f.values = map[string]*redispkg.RedisValue{}
+	}
+	current, ok := f.values[key]
+	if !ok || current == nil || current.Type != "list" {
+		current = &redispkg.RedisValue{Type: "list", TTL: -1, Value: []string{}}
+		f.values[key] = current
+	}
+	list, _ := current.Value.([]string)
+	list = append(list, values...)
+	current.Value = list
+	current.Length = int64(len(list))
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) SetAdd(key string, members ...string) error {
+	if f.values == nil {
+		f.values = map[string]*redispkg.RedisValue{}
+	}
+	current, ok := f.values[key]
+	if !ok || current == nil || current.Type != "set" {
+		current = &redispkg.RedisValue{Type: "set", TTL: -1, Value: []string{}}
+		f.values[key] = current
+	}
+	setValues, _ := current.Value.([]string)
+	seen := make(map[string]struct{}, len(setValues)+len(members))
+	for _, item := range setValues {
+		seen[item] = struct{}{}
+	}
+	for _, item := range members {
+		if _, ok := seen[item]; ok {
+			continue
+		}
+		seen[item] = struct{}{}
+		setValues = append(setValues, item)
+	}
+	sort.Strings(setValues)
+	current.Value = setValues
+	current.Length = int64(len(setValues))
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) ZSetAdd(key string, members ...redispkg.ZSetMember) error {
+	if f.values == nil {
+		f.values = map[string]*redispkg.RedisValue{}
+	}
+	copied := append([]redispkg.ZSetMember(nil), members...)
+	sort.Slice(copied, func(i, j int) bool {
+		if copied[i].Score == copied[j].Score {
+			return copied[i].Member < copied[j].Member
+		}
+		return copied[i].Score < copied[j].Score
+	})
+	f.values[key] = &redispkg.RedisValue{Type: "zset", TTL: -1, Value: copied, Length: int64(len(copied))}
+	return nil
+}
+
+func (f *fakeRedisMigrationClient) StreamAdd(key string, fields map[string]string, id string) (string, error) {
+	if f.values == nil {
+		f.values = map[string]*redispkg.RedisValue{}
+	}
+	current, ok := f.values[key]
+	if !ok || current == nil || current.Type != "stream" {
+		current = &redispkg.RedisValue{Type: "stream", TTL: -1, Value: []redispkg.StreamEntry{}}
+		f.values[key] = current
+	}
+	entries, _ := current.Value.([]redispkg.StreamEntry)
+	entryID := id
+	if entryID == "" {
+		entryID = fmt.Sprintf("%d-0", len(entries)+1)
+	}
+	entries = append(entries, redispkg.StreamEntry{ID: entryID, Fields: fields})
+	current.Value = entries
+	current.Length = int64(len(entries))
+	return entryID, nil
+}
+
+type fakeRedisMongoTargetDB struct {
+	tables     []string
+	queryTable string
+	queryRows  []map[string]interface{}
+	execs      []string
+	applyTable string
+	applySet   connection.ChangeSet
+}
+
+func (f *fakeRedisMongoTargetDB) Connect(config connection.ConnectionConfig) error { return nil }
+func (f *fakeRedisMongoTargetDB) Close() error                                     { return nil }
+func (f *fakeRedisMongoTargetDB) Ping() error                                      { return nil }
+func (f *fakeRedisMongoTargetDB) Query(query string) ([]map[string]interface{}, []string, error) {
+	queryTable := strings.TrimSpace(f.queryTable)
+	if queryTable == "" {
+		queryTable = "redis_db_0_keys"
+	}
+	if strings.Contains(query, fmt.Sprintf(`"find":"%s"`, queryTable)) {
+		return f.queryRows, []string{"_id", "key", "value"}, nil
+	}
+	return nil, nil, nil
+}
+func (f *fakeRedisMongoTargetDB) Exec(query string) (int64, error) {
+	f.execs = append(f.execs, query)
+	return 1, nil
+}
+func (f *fakeRedisMongoTargetDB) GetDatabases() ([]string, error) { return []string{"app"}, nil }
+func (f *fakeRedisMongoTargetDB) GetTables(dbName string) ([]string, error) {
+	return f.tables, nil
+}
+func (f *fakeRedisMongoTargetDB) GetCreateStatement(dbName, tableName string) (string, error) {
+	return "", nil
+}
+func (f *fakeRedisMongoTargetDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
+	return nil, nil
+}
+func (f *fakeRedisMongoTargetDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
+	return nil, nil
+}
+func (f *fakeRedisMongoTargetDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
+	return nil, nil
+}
+func (f *fakeRedisMongoTargetDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
+	return nil, nil
+}
+func (f *fakeRedisMongoTargetDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
+	return nil, nil
+}
+func (f *fakeRedisMongoTargetDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+	f.applyTable = tableName
+	f.applySet = changes
+	return nil
+}
+
+type fakeMongoRedisSourceDB struct {
+	tables        []string
+	rowsByTable   map[string][]map[string]interface{}
+	connectConfig connection.ConnectionConfig
+}
+
+func (f *fakeMongoRedisSourceDB) Connect(config connection.ConnectionConfig) error {
+	f.connectConfig = config
+	return nil
+}
+func (f *fakeMongoRedisSourceDB) Close() error { return nil }
+func (f *fakeMongoRedisSourceDB) Ping() error  { return nil }
+func (f *fakeMongoRedisSourceDB) Query(query string) ([]map[string]interface{}, []string, error) {
+	for tableName, rows := range f.rowsByTable {
+		if strings.Contains(query, fmt.Sprintf(`"find":"%s"`, tableName)) {
+			return rows, []string{"_id", "key", "type", "ttl", "value"}, nil
+		}
+	}
+	return nil, nil, fmt.Errorf("unexpected query: %s", query)
+}
+func (f *fakeMongoRedisSourceDB) Exec(query string) (int64, error) { return 0, nil }
+func (f *fakeMongoRedisSourceDB) GetDatabases() ([]string, error)  { return []string{"app"}, nil }
+func (f *fakeMongoRedisSourceDB) GetTables(dbName string) ([]string, error) {
+	return f.tables, nil
+}
+func (f *fakeMongoRedisSourceDB) GetCreateStatement(dbName, tableName string) (string, error) {
+	return "", nil
+}
+func (f *fakeMongoRedisSourceDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
+	return nil, nil
+}
+func (f *fakeMongoRedisSourceDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
+	return nil, nil
+}
+func (f *fakeMongoRedisSourceDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
+	return nil, nil
+}
+func (f *fakeMongoRedisSourceDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
+	return nil, nil
+}
+func (f *fakeMongoRedisSourceDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
+	return nil, nil
+}
+
+func TestRunSync_RedisToMongoAppliesInsertAndUpdate(t *testing.T) {
+	fakeRedis := &fakeRedisMigrationClient{
+		values: map[string]*redispkg.RedisValue{
+			"user:1": {Type: "hash", TTL: 120, Length: 2, Value: map[string]string{"name": "alice"}},
+			"user:2": {Type: "string", TTL: -1, Length: 1, Value: "online"},
+		},
+	}
+	fakeTarget := &fakeRedisMongoTargetDB{
+		tables: []string{"redis_db_0_keys"},
+		queryRows: []map[string]interface{}{
+			{"_id": "db0:user:1", "redisDb": 0, "key": "user:1", "type": "hash", "ttl": 120, "length": int64(2), "value": map[string]interface{}{"name": "old"}},
+		},
+	}
+
+	oldNewRedisClient := newRedisSourceClient
+	oldNewDatabase := newSyncDatabase
+	defer func() {
+		newRedisSourceClient = oldNewRedisClient
+		newSyncDatabase = oldNewDatabase
+	}()
+	newRedisSourceClient = func() redisMigrationClient { return fakeRedis }
+	newSyncDatabase = func(dbType string) (db.Database, error) { return fakeTarget, nil }
+
+	engine := NewSyncEngine(Reporter{})
+	result := engine.RunSync(SyncConfig{
+		SourceConfig: connection.ConnectionConfig{Type: "redis", Database: "0"},
+		TargetConfig: connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		Tables:       []string{"user:1", "user:2"},
+		Content:      "data",
+		Mode:         "insert_update",
+	})
+
+	if !result.Success {
+		t.Fatalf("expected success, got: %+v", result)
+	}
+	if fakeRedis.connectConfig.RedisDB != 0 {
+		t.Fatalf("expected redis db 0, got %d", fakeRedis.connectConfig.RedisDB)
+	}
+	if fakeTarget.applyTable != "redis_db_0_keys" {
+		t.Fatalf("unexpected apply table: %s", fakeTarget.applyTable)
+	}
+	if len(fakeTarget.applySet.Inserts) != 1 || len(fakeTarget.applySet.Updates) != 1 {
+		t.Fatalf("unexpected change set: %+v", fakeTarget.applySet)
+	}
+}
+
+func TestRunSync_RedisToMongoUsesConfiguredCollectionName(t *testing.T) {
+	fakeRedis := &fakeRedisMigrationClient{
+		values: map[string]*redispkg.RedisValue{
+			"user:1": {Type: "string", TTL: -1, Length: 1, Value: "online"},
+		},
+	}
+	fakeTarget := &fakeRedisMongoTargetDB{
+		tables:     []string{"custom_keyspace_docs"},
+		queryTable: "custom_keyspace_docs",
+	}
+
+	oldNewRedisClient := newRedisSourceClient
+	oldNewDatabase := newSyncDatabase
+	defer func() {
+		newRedisSourceClient = oldNewRedisClient
+		newSyncDatabase = oldNewDatabase
+	}()
+	newRedisSourceClient = func() redisMigrationClient { return fakeRedis }
+	newSyncDatabase = func(dbType string) (db.Database, error) { return fakeTarget, nil }
+
+	engine := NewSyncEngine(Reporter{})
+	result := engine.RunSync(SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "redis", Database: "0"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		Tables:              []string{"user:1"},
+		Content:             "data",
+		Mode:                "insert_update",
+		MongoCollectionName: "custom_keyspace_docs",
+	})
+
+	if !result.Success {
+		t.Fatalf("expected success, got: %+v", result)
+	}
+	if fakeTarget.applyTable != "custom_keyspace_docs" {
+		t.Fatalf("unexpected apply table: %s", fakeTarget.applyTable)
+	}
+}
+
+func TestPreview_RedisToMongoReturnsDocumentPreview(t *testing.T) {
+	fakeRedis := &fakeRedisMigrationClient{
+		values: map[string]*redispkg.RedisValue{
+			"session:1": {Type: "string", TTL: 60, Length: 1, Value: "token"},
+		},
+	}
+	fakeTarget := &fakeRedisMongoTargetDB{}
+
+	oldNewRedisClient := newRedisSourceClient
+	oldNewDatabase := newSyncDatabase
+	defer func() {
+		newRedisSourceClient = oldNewRedisClient
+		newSyncDatabase = oldNewDatabase
+	}()
+	newRedisSourceClient = func() redisMigrationClient { return fakeRedis }
+	newSyncDatabase = func(dbType string) (db.Database, error) { return fakeTarget, nil }
+
+	engine := NewSyncEngine(Reporter{})
+	preview, err := engine.Preview(SyncConfig{
+		SourceConfig: connection.ConnectionConfig{Type: "redis", Database: "0"},
+		TargetConfig: connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		Tables:       []string{"session:1"},
+		Content:      "data",
+		Mode:         "insert_update",
+	}, "session:1", 20)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if preview.PKColumn != "_id" {
+		t.Fatalf("unexpected pk column: %s", preview.PKColumn)
+	}
+	if preview.TotalInserts != 1 || len(preview.Inserts) != 1 {
+		t.Fatalf("unexpected preview: %+v", preview)
+	}
+	if preview.Inserts[0].PK != "db0:session:1" {
+		t.Fatalf("unexpected preview pk: %+v", preview.Inserts[0])
+	}
+}
+
+func TestRunSync_MongoToRedisAppliesStringAndHash(t *testing.T) {
+	fakeSource := &fakeMongoRedisSourceDB{
+		tables: []string{"redis_db_0_keys"},
+		rowsByTable: map[string][]map[string]interface{}{
+			"redis_db_0_keys": {
+				{"_id": "db0:session:1", "key": "session:1", "type": "string", "ttl": int64(60), "value": "token"},
+				{"_id": "db0:user:1", "key": "user:1", "type": "hash", "ttl": int64(120), "value": map[string]interface{}{"name": "alice", "role": "admin"}},
+			},
+		},
+	}
+	fakeRedis := &fakeRedisMigrationClient{
+		values: map[string]*redispkg.RedisValue{
+			"user:1": {Type: "hash", TTL: 120, Length: 1, Value: map[string]string{"name": "old"}},
+		},
+	}
+
+	oldNewRedisClient := newRedisSourceClient
+	oldNewDatabase := newSyncDatabase
+	defer func() {
+		newRedisSourceClient = oldNewRedisClient
+		newSyncDatabase = oldNewDatabase
+	}()
+	newRedisSourceClient = func() redisMigrationClient { return fakeRedis }
+	newSyncDatabase = func(dbType string) (db.Database, error) { return fakeSource, nil }
+
+	engine := NewSyncEngine(Reporter{})
+	result := engine.RunSync(SyncConfig{
+		SourceConfig: connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		TargetConfig: connection.ConnectionConfig{Type: "redis", Database: "0"},
+		Tables:       []string{"redis_db_0_keys"},
+		Content:      "data",
+		Mode:         "insert_update",
+	})
+
+	if !result.Success {
+		t.Fatalf("expected success, got: %+v", result)
+	}
+	if fakeRedis.connectConfig.RedisDB != 0 {
+		t.Fatalf("expected redis db 0, got %d", fakeRedis.connectConfig.RedisDB)
+	}
+	if got := fakeRedis.values["session:1"]; got == nil || got.Type != "string" || got.Value != "token" || got.TTL != 60 {
+		t.Fatalf("unexpected string value: %+v", got)
+	}
+	gotHash, _ := fakeRedis.values["user:1"].Value.(map[string]string)
+	if gotHash["name"] != "alice" || gotHash["role"] != "admin" {
+		t.Fatalf("unexpected hash value: %+v", fakeRedis.values["user:1"])
+	}
+	if result.RowsInserted != 1 || result.RowsUpdated != 1 {
+		t.Fatalf("unexpected sync result: %+v", result)
+	}
+}
+
+func TestPreview_MongoToRedisReturnsCollectionPreview(t *testing.T) {
+	fakeSource := &fakeMongoRedisSourceDB{
+		tables: []string{"redis_db_0_keys"},
+		rowsByTable: map[string][]map[string]interface{}{
+			"redis_db_0_keys": {
+				{"_id": "db0:session:1", "key": "session:1", "type": "string", "ttl": int64(60), "value": "token"},
+			},
+		},
+	}
+	fakeRedis := &fakeRedisMigrationClient{values: map[string]*redispkg.RedisValue{}}
+
+	oldNewRedisClient := newRedisSourceClient
+	oldNewDatabase := newSyncDatabase
+	defer func() {
+		newRedisSourceClient = oldNewRedisClient
+		newSyncDatabase = oldNewDatabase
+	}()
+	newRedisSourceClient = func() redisMigrationClient { return fakeRedis }
+	newSyncDatabase = func(dbType string) (db.Database, error) { return fakeSource, nil }
+
+	engine := NewSyncEngine(Reporter{})
+	preview, err := engine.Preview(SyncConfig{
+		SourceConfig: connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		TargetConfig: connection.ConnectionConfig{Type: "redis", Database: "0"},
+		Tables:       []string{"redis_db_0_keys"},
+		Content:      "data",
+		Mode:         "insert_update",
+	}, "redis_db_0_keys", 20)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if preview.Table != "redis_db_0_keys" || preview.PKColumn != "key" {
+		t.Fatalf("unexpected preview header: %+v", preview)
+	}
+	if preview.TotalInserts != 1 || len(preview.Inserts) != 1 {
+		t.Fatalf("unexpected preview rows: %+v", preview)
+	}
+	if preview.Inserts[0].PK != "session:1" {
+		t.Fatalf("unexpected preview pk: %+v", preview.Inserts[0])
+	}
+}

internal/sync/schema_migration_test.go

@@ -0,0 +1,957 @@
+package sync
+
+import (
+	"GoNavi-Wails/internal/connection"
+	"context"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+type fakeMigrationDB struct {
+	columns   map[string][]connection.ColumnDefinition
+	indexes   map[string][]connection.IndexDefinition
+	queryData map[string][]map[string]interface{}
+	queryCols map[string][]string
+}
+
+func (f *fakeMigrationDB) Connect(config connection.ConnectionConfig) error { return nil }
+func (f *fakeMigrationDB) Close() error                                     { return nil }
+func (f *fakeMigrationDB) Ping() error                                      { return nil }
+func (f *fakeMigrationDB) Query(query string) ([]map[string]interface{}, []string, error) {
+	if rows, ok := f.queryData[query]; ok {
+		return rows, f.queryCols[query], nil
+	}
+	return nil, nil, nil
+}
+func (f *fakeMigrationDB) Exec(query string) (int64, error) { return 0, nil }
+func (f *fakeMigrationDB) GetDatabases() ([]string, error)  { return nil, nil }
+func (f *fakeMigrationDB) GetTables(dbName string) ([]string, error) {
+	return nil, nil
+}
+func (f *fakeMigrationDB) GetCreateStatement(dbName, tableName string) (string, error) {
+	return "", nil
+}
+func (f *fakeMigrationDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
+	key := dbName + "." + tableName
+	if rows, ok := f.columns[key]; ok {
+		return rows, nil
+	}
+	return []connection.ColumnDefinition{}, nil
+}
+func (f *fakeMigrationDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {
+	return nil, nil
+}
+func (f *fakeMigrationDB) GetIndexes(dbName, tableName string) ([]connection.IndexDefinition, error) {
+	key := dbName + "." + tableName
+	if rows, ok := f.indexes[key]; ok {
+		return rows, nil
+	}
+	return nil, nil
+}
+func (f *fakeMigrationDB) GetForeignKeys(dbName, tableName string) ([]connection.ForeignKeyDefinition, error) {
+	return nil, nil
+}
+func (f *fakeMigrationDB) GetTriggers(dbName, tableName string) ([]connection.TriggerDefinition, error) {
+	return nil, nil
+}
+func (f *fakeMigrationDB) QueryContext(ctx context.Context, query string) ([]map[string]interface{}, []string, error) {
+	return f.Query(query)
+}
+func (f *fakeMigrationDB) ExecContext(ctx context.Context, query string) (int64, error) {
+	return 0, nil
+}
+
+func TestBuildMySQLToKingbaseColumnDefinition_AutoIncrementAndBoolean(t *testing.T) {
+	t.Parallel()
+
+	def, warnings := buildMySQLToKingbaseColumnDefinition(connection.ColumnDefinition{
+		Name:     "id",
+		Type:     "int unsigned",
+		Nullable: "NO",
+		Extra:    "auto_increment",
+	})
+	if !strings.Contains(def, "bigint") || !strings.Contains(def, "GENERATED BY DEFAULT AS IDENTITY") || !strings.Contains(def, "NOT NULL") {
+		t.Fatalf("unexpected definition: %s", def)
+	}
+	if len(warnings) != 0 {
+		t.Fatalf("unexpected warnings: %v", warnings)
+	}
+
+	def, warnings = buildMySQLToKingbaseColumnDefinition(connection.ColumnDefinition{
+		Name:     "enabled",
+		Type:     "tinyint(1)",
+		Nullable: "YES",
+		Default:  stringPtr("1"),
+	})
+	if !strings.Contains(def, "boolean") || !strings.Contains(def, "DEFAULT TRUE") {
+		t.Fatalf("unexpected boolean definition: %s", def)
+	}
+	if len(warnings) != 0 {
+		t.Fatalf("unexpected warnings for boolean: %v", warnings)
+	}
+}
+
+func TestBuildMySQLToKingbaseCreateTablePlan_GeneratesAndSkipsIndexes(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		indexes: map[string][]connection.IndexDefinition{
+			"shop.orders": {
+				{Name: "PRIMARY", ColumnName: "id", NonUnique: 0, SeqInIndex: 1, IndexType: "BTREE"},
+				{Name: "idx_user_status", ColumnName: "user_id", NonUnique: 1, SeqInIndex: 1, IndexType: "BTREE"},
+				{Name: "idx_user_status", ColumnName: "status", NonUnique: 1, SeqInIndex: 2, IndexType: "BTREE"},
+				{Name: "idx_name_prefix", ColumnName: "name", NonUnique: 1, SeqInIndex: 1, IndexType: "BTREE", SubPart: 12},
+				{Name: "idx_fulltext_note", ColumnName: "note", NonUnique: 1, SeqInIndex: 1, IndexType: "FULLTEXT"},
+			},
+		},
+	}
+	cols := []connection.ColumnDefinition{
+		{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI", Extra: "auto_increment"},
+		{Name: "user_id", Type: "bigint", Nullable: "NO"},
+		{Name: "status", Type: "varchar(32)", Nullable: "YES"},
+		{Name: "name", Type: "varchar(128)", Nullable: "YES"},
+		{Name: "note", Type: "text", Nullable: "YES"},
+	}
+	cfg := SyncConfig{CreateIndexes: true}
+	createSQL, postSQL, warnings, unsupported, idxCreate, idxSkip, err := buildMySQLToKingbaseCreateTablePlan(cfg, "public.orders", cols, sourceDB, "shop", "orders")
+	if err != nil {
+		t.Fatalf("buildMySQLToKingbaseCreateTablePlan returned error: %v", err)
+	}
+	if !strings.Contains(createSQL, `CREATE TABLE "public"."orders"`) {
+		t.Fatalf("unexpected create SQL: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, `PRIMARY KEY ("id")`) {
+		t.Fatalf("create SQL missing primary key: %s", createSQL)
+	}
+	if idxCreate != 1 || idxSkip != 2 {
+		t.Fatalf("unexpected index summary: create=%d skip=%d", idxCreate, idxSkip)
+	}
+	if len(postSQL) != 1 || !strings.Contains(postSQL[0], `CREATE INDEX "idx_user_status"`) {
+		t.Fatalf("unexpected post SQL: %v", postSQL)
+	}
+	if len(warnings) != 0 {
+		t.Fatalf("unexpected warnings: %v", warnings)
+	}
+	wantUnsupported := []string{
+		"索引 idx_name_prefix 使用前缀长度，当前暂不支持迁移",
+		"索引 idx_fulltext_note 类型=FULLTEXT，当前暂不支持自动迁移",
+	}
+	if !reflect.DeepEqual(unsupported, wantUnsupported) {
+		t.Fatalf("unexpected unsupported objects: got=%v want=%v", unsupported, wantUnsupported)
+	}
+}
+
+func TestBuildSchemaMigrationPlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"shop.orders": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI", Extra: "auto_increment"},
+				{Name: "name", Type: "varchar(128)", Nullable: "YES"},
+			},
+		},
+		indexes: map[string][]connection.IndexDefinition{},
+	}
+	targetDB := &fakeMigrationDB{columns: map[string][]connection.ColumnDefinition{}}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "mysql", Database: "shop"},
+		TargetConfig:        connection.ConnectionConfig{Type: "kingbase", Database: "demo"},
+		TargetTableStrategy: "smart",
+		CreateIndexes:       true,
+	}
+	plan, sourceCols, targetCols, err := buildSchemaMigrationPlan(cfg, "orders", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildSchemaMigrationPlan returned error: %v", err)
+	}
+	if len(sourceCols) != 2 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if plan.TargetTableExists {
+		t.Fatalf("expected target table missing")
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.PlannedAction, "自动建表") {
+		t.Fatalf("unexpected planned action: %s", plan.PlannedAction)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `CREATE TABLE "public"."orders"`) {
+		t.Fatalf("unexpected create table SQL: %s", plan.CreateTableSQL)
+	}
+}
+
+func stringPtr(v string) *string { return &v }
+
+func TestBuildPGLikeToMySQLCreateTablePlan_GeneratesMySQLDDL(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		indexes: map[string][]connection.IndexDefinition{
+			"public.users": {
+				{Name: "users_email_key", ColumnName: "email", NonUnique: 0, SeqInIndex: 1, IndexType: "BTREE"},
+				{Name: "idx_users_name", ColumnName: "name", NonUnique: 1, SeqInIndex: 1, IndexType: "BTREE"},
+			},
+		},
+	}
+	cols := []connection.ColumnDefinition{
+		{Name: "id", Type: "integer", Nullable: "NO", Key: "PRI", Extra: "auto_increment"},
+		{Name: "email", Type: "character varying(120)", Nullable: "NO"},
+		{Name: "name", Type: "text", Nullable: "YES"},
+		{Name: "profile", Type: "jsonb", Nullable: "YES"},
+	}
+	cfg := SyncConfig{CreateIndexes: true}
+	createSQL, postSQL, warnings, unsupported, idxCreate, idxSkip, err := buildPGLikeToMySQLCreateTablePlan(cfg, "app.users", cols, sourceDB, "public", "users")
+	if err != nil {
+		t.Fatalf("buildPGLikeToMySQLCreateTablePlan returned error: %v", err)
+	}
+	if !strings.Contains(createSQL, "CREATE TABLE `app`.`users`") {
+		t.Fatalf("unexpected create SQL: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, "`id` int AUTO_INCREMENT NOT NULL") {
+		t.Fatalf("unexpected id definition: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, "`profile` json") {
+		t.Fatalf("unexpected json definition: %s", createSQL)
+	}
+	if idxCreate != 2 || idxSkip != 0 {
+		t.Fatalf("unexpected index summary: create=%d skip=%d", idxCreate, idxSkip)
+	}
+	if len(postSQL) != 2 {
+		t.Fatalf("unexpected post sql length: %v", postSQL)
+	}
+	if len(warnings) != 0 {
+		t.Fatalf("unexpected warnings: %v", warnings)
+	}
+	if len(unsupported) != 0 {
+		t.Fatalf("unexpected unsupported: %v", unsupported)
+	}
+}
+
+func TestBuildPGLikeToMySQLPlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"public.orders": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI", Extra: "auto_increment"},
+				{Name: "amount", Type: "numeric(10,2)", Nullable: "NO"},
+			},
+		},
+		indexes: map[string][]connection.IndexDefinition{},
+	}
+	targetDB := &fakeMigrationDB{columns: map[string][]connection.ColumnDefinition{}}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "kingbase", Database: "public"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mysql", Database: "app"},
+		TargetTableStrategy: "smart",
+		CreateIndexes:       true,
+	}
+	plan, sourceCols, targetCols, err := buildPGLikeToMySQLPlan(cfg, "orders", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildPGLikeToMySQLPlan returned error: %v", err)
+	}
+	if len(sourceCols) != 2 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if plan.TargetTableExists {
+		t.Fatalf("expected target table missing")
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `app`.`orders`") {
+		t.Fatalf("unexpected create table SQL: %s", plan.CreateTableSQL)
+	}
+}
+
+func TestBuildMySQLToPGLikeCreateTablePlan_GeneratesPostgresDDL(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		indexes: map[string][]connection.IndexDefinition{
+			"shop.orders": {
+				{Name: "idx_orders_user", ColumnName: "user_id", NonUnique: 1, SeqInIndex: 1, IndexType: "BTREE"},
+				{Name: "idx_orders_user", ColumnName: "status", NonUnique: 1, SeqInIndex: 2, IndexType: "BTREE"},
+			},
+		},
+	}
+	cols := []connection.ColumnDefinition{
+		{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI", Extra: "auto_increment"},
+		{Name: "user_id", Type: "bigint", Nullable: "NO"},
+		{Name: "status", Type: "varchar(32)", Nullable: "YES"},
+		{Name: "payload", Type: "json", Nullable: "YES"},
+	}
+	cfg := SyncConfig{CreateIndexes: true}
+	createSQL, postSQL, warnings, unsupported, idxCreate, idxSkip, err := buildMySQLToPGLikeCreateTablePlan("postgres", cfg, "public.orders", cols, sourceDB, "shop", "orders")
+	if err != nil {
+		t.Fatalf("buildMySQLToPGLikeCreateTablePlan returned error: %v", err)
+	}
+	if !strings.Contains(createSQL, `CREATE TABLE "public"."orders"`) {
+		t.Fatalf("unexpected create SQL: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, `GENERATED BY DEFAULT AS IDENTITY`) {
+		t.Fatalf("missing identity mapping: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, `jsonb`) {
+		t.Fatalf("missing jsonb mapping: %s", createSQL)
+	}
+	if idxCreate != 1 || idxSkip != 0 {
+		t.Fatalf("unexpected index summary: create=%d skip=%d", idxCreate, idxSkip)
+	}
+	if len(postSQL) != 1 || !strings.Contains(postSQL[0], `CREATE INDEX "idx_orders_user"`) {
+		t.Fatalf("unexpected post SQL: %v", postSQL)
+	}
+	if len(warnings) != 0 || len(unsupported) != 0 {
+		t.Fatalf("unexpected warnings/unsupported: warnings=%v unsupported=%v", warnings, unsupported)
+	}
+}
+
+func TestBuildMySQLToClickHouseCreateTableSQL_GeneratesMergeTree(t *testing.T) {
+	t.Parallel()
+
+	cols := []connection.ColumnDefinition{
+		{Name: "id", Type: "bigint unsigned", Nullable: "NO", Key: "PRI"},
+		{Name: "name", Type: "varchar(128)", Nullable: "YES"},
+		{Name: "payload", Type: "json", Nullable: "YES"},
+	}
+	createSQL, warnings, unsupported := buildMySQLToClickHouseCreateTableSQL("analytics.orders", cols)
+	if !strings.Contains(createSQL, "ENGINE = MergeTree()") {
+		t.Fatalf("unexpected create SQL: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, "ORDER BY (`id`)") {
+		t.Fatalf("unexpected order by: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, "`payload` Nullable(String)") {
+		t.Fatalf("unexpected json mapping: %s", createSQL)
+	}
+	if len(warnings) == 0 {
+		t.Fatalf("expected warnings for clickhouse semantics")
+	}
+	if len(unsupported) != 0 {
+		t.Fatalf("unexpected unsupported: %v", unsupported)
+	}
+}
+
+func TestBuildClickHouseToMySQLCreateTableSQL_GeneratesMySQLDDL(t *testing.T) {
+	t.Parallel()
+
+	cols := []connection.ColumnDefinition{
+		{Name: "id", Type: "UInt64", Nullable: "NO", Key: "PRI"},
+		{Name: "event_time", Type: "DateTime", Nullable: "NO"},
+		{Name: "payload", Type: "Map(String, String)", Nullable: "YES"},
+	}
+	createSQL, warnings := buildClickHouseToMySQLCreateTableSQL("app.metrics", cols)
+	if !strings.Contains(createSQL, "CREATE TABLE `app`.`metrics`") {
+		t.Fatalf("unexpected create SQL: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, "`id` bigint unsigned NOT NULL") {
+		t.Fatalf("unexpected uint64 mapping: %s", createSQL)
+	}
+	if !strings.Contains(createSQL, "`payload` json") {
+		t.Fatalf("unexpected complex type mapping: %s", createSQL)
+	}
+	if len(warnings) == 0 {
+		t.Fatalf("expected warning for limited clickhouse reverse semantics")
+	}
+}
+
+func TestBuildMySQLToMongoPlan_AutoCreateCollection(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"shop.users": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI"},
+				{Name: "name", Type: "varchar(64)", Nullable: "YES"},
+			},
+		},
+		indexes: map[string][]connection.IndexDefinition{
+			"shop.users": {
+				{Name: "idx_users_name", ColumnName: "name", NonUnique: 1, SeqInIndex: 1, IndexType: "BTREE"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "mysql", Database: "shop"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		TargetTableStrategy: "smart",
+		CreateIndexes:       true,
+	}
+	plan, sourceCols, targetCols, err := buildMySQLToMongoPlan(cfg, "users", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildMySQLToMongoPlan returned error: %v", err)
+	}
+	if len(sourceCols) != 2 || targetCols != nil {
+		t.Fatalf("unexpected source/target columns: %d / %v", len(sourceCols), targetCols)
+	}
+	if !plan.AutoCreate || len(plan.PreDataSQL) == 0 {
+		t.Fatalf("expected auto create collection command: %+v", plan)
+	}
+	if !strings.Contains(plan.PreDataSQL[0], `"create":"users"`) {
+		t.Fatalf("unexpected create collection command: %v", plan.PreDataSQL)
+	}
+	if len(plan.PostDataSQL) != 1 || !strings.Contains(plan.PostDataSQL[0], `"createIndexes":"users"`) {
+		t.Fatalf("unexpected index commands: %v", plan.PostDataSQL)
+	}
+}
+
+func TestBuildPGLikeToMongoPlan_AutoCreateCollection(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"public.orders": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI"},
+				{Name: "name", Type: "varchar(64)", Nullable: "YES"},
+			},
+		},
+		indexes: map[string][]connection.IndexDefinition{
+			"public.orders": {
+				{Name: "idx_orders_name", ColumnName: "name", NonUnique: 1, SeqInIndex: 1, IndexType: "BTREE"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "postgres", Database: "public"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		TargetTableStrategy: "smart",
+		CreateIndexes:       true,
+	}
+	plan, sourceCols, targetCols, err := buildPGLikeToMongoPlan(cfg, "orders", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildPGLikeToMongoPlan returned error: %v", err)
+	}
+	if len(sourceCols) != 2 || targetCols != nil {
+		t.Fatalf("unexpected source/target columns: %d / %v", len(sourceCols), targetCols)
+	}
+	if !plan.AutoCreate || len(plan.PreDataSQL) == 0 {
+		t.Fatalf("expected auto create collection command: %+v", plan)
+	}
+	if !strings.Contains(plan.PreDataSQL[0], `"create":"orders"`) {
+		t.Fatalf("unexpected create collection command: %v", plan.PreDataSQL)
+	}
+	if len(plan.PostDataSQL) != 1 || !strings.Contains(plan.PostDataSQL[0], `"createIndexes":"orders"`) {
+		t.Fatalf("unexpected index commands: %v", plan.PostDataSQL)
+	}
+}
+
+func TestBuildClickHouseToMongoPlan_AutoCreateCollection(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"analytics.metrics": {
+				{Name: "id", Type: "UInt64", Nullable: "NO", Key: "PRI"},
+				{Name: "host", Type: "String", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "clickhouse", Database: "analytics"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildClickHouseToMongoPlan(cfg, "metrics", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildClickHouseToMongoPlan returned error: %v", err)
+	}
+	if len(sourceCols) != 2 || targetCols != nil {
+		t.Fatalf("unexpected source/target columns: %d / %v", len(sourceCols), targetCols)
+	}
+	if !plan.AutoCreate || len(plan.PreDataSQL) == 0 {
+		t.Fatalf("expected auto create collection command: %+v", plan)
+	}
+	if !strings.Contains(plan.PreDataSQL[0], `"create":"metrics"`) {
+		t.Fatalf("unexpected create collection command: %v", plan.PreDataSQL)
+	}
+}
+
+func TestBuildTDengineToMongoPlan_AutoCreateCollection(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"src.cpu": {
+				{Name: "ts", Type: "TIMESTAMP", Nullable: "NO"},
+				{Name: "host", Type: "NCHAR(64)", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "src"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mongodb", Database: "app"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildTDengineToMongoPlan(cfg, "cpu", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildTDengineToMongoPlan returned error: %v", err)
+	}
+	if len(sourceCols) != 2 || targetCols != nil {
+		t.Fatalf("unexpected source/target columns: %d / %v", len(sourceCols), targetCols)
+	}
+	if !plan.AutoCreate || len(plan.PreDataSQL) == 0 {
+		t.Fatalf("expected auto create collection command: %+v", plan)
+	}
+	if !strings.Contains(plan.PreDataSQL[0], `"create":"cpu"`) {
+		t.Fatalf("unexpected create collection command: %v", plan.PreDataSQL)
+	}
+}
+
+func TestBuildMongoToMySQLPlan_InfersColumnsAndCreatesTable(t *testing.T) {
+	t.Parallel()
+
+	query := `{"find":"users","filter":{},"limit":200}`
+	sourceDB := &fakeMigrationDB{
+		queryData: map[string][]map[string]interface{}{
+			query: {
+				{"_id": "a1", "name": "alice", "age": int64(18), "profile": map[string]interface{}{"city": "shanghai"}},
+				{"_id": "b2", "name": "bob", "profile": map[string]interface{}{"city": "beijing"}},
+			},
+		},
+		queryCols: map[string][]string{query: {"_id", "name", "age", "profile"}},
+		indexes: map[string][]connection.IndexDefinition{
+			"crm.users": {{Name: "email_1", ColumnName: "name", NonUnique: 1, SeqInIndex: 1, IndexType: "BTREE"}},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "mongodb", Database: "crm"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mysql", Database: "app"},
+		TargetTableStrategy: "smart",
+		CreateIndexes:       true,
+	}
+	plan, sourceCols, _, err := buildMongoToMySQLPlan(cfg, "users", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildMongoToMySQLPlan returned error: %v", err)
+	}
+	if len(sourceCols) == 0 {
+		t.Fatalf("expected inferred source cols")
+	}
+	if !plan.AutoCreate || !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `app`.`users`") {
+		t.Fatalf("unexpected create table sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`_id` text NOT NULL") && !strings.Contains(plan.CreateTableSQL, "`_id` varchar") {
+		t.Fatalf("missing inferred _id column: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`profile` json") {
+		t.Fatalf("expected nested field degrade to json: %s", plan.CreateTableSQL)
+	}
+	if len(plan.PostDataSQL) != 1 {
+		t.Fatalf("expected one post index sql, got=%v", plan.PostDataSQL)
+	}
+}
+
+func TestBuildTDengineToMySQLPlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"metrics.cpu": {
+				{Name: "ts", Type: "TIMESTAMP", Nullable: "NO"},
+				{Name: "host", Type: "NCHAR(64)", Nullable: "YES", Key: "TAG", Extra: "TAG"},
+				{Name: "usage", Type: "DOUBLE", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "metrics"},
+		TargetConfig:        connection.ConnectionConfig{Type: "mysql", Database: "app"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildTDengineToMySQLPlan(cfg, "cpu", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildTDengineToMySQLPlan returned error: %v", err)
+	}
+	if len(sourceCols) != 3 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `app`.`cpu`") {
+		t.Fatalf("unexpected create table sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`ts` datetime") {
+		t.Fatalf("expected timestamp mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`host` varchar(64)") {
+		t.Fatalf("expected nchar mapping, got: %s", plan.CreateTableSQL)
+	}
+	if len(plan.Warnings) == 0 || !strings.Contains(strings.Join(plan.Warnings, " "), "TAG") {
+		t.Fatalf("expected TAG warning, got: %v", plan.Warnings)
+	}
+}
+
+func TestBuildTDengineToPGLikePlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"metrics.cpu": {
+				{Name: "ts", Type: "TIMESTAMP", Nullable: "NO"},
+				{Name: "payload", Type: "JSON", Nullable: "YES"},
+				{Name: "host", Type: "BINARY(32)", Nullable: "YES", Key: "TAG", Extra: "TAG"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "metrics"},
+		TargetConfig:        connection.ConnectionConfig{Type: "kingbase", Database: "ignored"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildTDengineToPGLikePlan(cfg, "cpu", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildTDengineToPGLikePlan returned error: %v", err)
+	}
+	if len(sourceCols) != 3 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, `CREATE TABLE "public"."cpu"`) {
+		t.Fatalf("unexpected create table sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `"ts" timestamp`) {
+		t.Fatalf("expected timestamp mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `"payload" jsonb`) {
+		t.Fatalf("expected json mapping, got: %s", plan.CreateTableSQL)
+	}
+	if len(plan.Warnings) == 0 || !strings.Contains(strings.Join(plan.Warnings, " "), "TAG") {
+		t.Fatalf("expected TAG warning, got: %v", plan.Warnings)
+	}
+}
+
+func TestBuildSchemaMigrationPlan_TDengineTargetWarnsInsertOnlyBoundary(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"shop.metrics": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI"},
+				{Name: "ts", Type: "datetime", Nullable: "NO"},
+				{Name: "value", Type: "double", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"taos.metrics": {
+				{Name: "id", Type: "bigint", Nullable: "NO"},
+				{Name: "ts", Type: "timestamp", Nullable: "NO"},
+				{Name: "value", Type: "double", Nullable: "YES"},
+			},
+		},
+	}
+	cfg := SyncConfig{
+		SourceConfig: connection.ConnectionConfig{Type: "mysql", Database: "shop"},
+		TargetConfig: connection.ConnectionConfig{Type: "tdengine", Database: "taos"},
+		Mode:         "insert_update",
+	}
+
+	plan, _, _, err := buildSchemaMigrationPlan(cfg, "metrics", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildSchemaMigrationPlan returned error: %v", err)
+	}
+	warnings := strings.Join(plan.Warnings, " ")
+	if !strings.Contains(warnings, "仅支持 INSERT 写入") {
+		t.Fatalf("expected TDengine target warning, got: %v", plan.Warnings)
+	}
+}
+
+func TestBuildMySQLLikeToTDenginePlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"shop.metrics": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI", Extra: "auto_increment"},
+				{Name: "ts", Type: "datetime", Nullable: "NO"},
+				{Name: "payload", Type: "json", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "mysql", Database: "shop"},
+		TargetConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "taos"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildMySQLLikeToTDenginePlan(cfg, "metrics", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildMySQLLikeToTDenginePlan returned error: %v", err)
+	}
+	if len(sourceCols) != 3 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `taos`.`metrics`") {
+		t.Fatalf("unexpected create sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`ts` TIMESTAMP") {
+		t.Fatalf("expected ts first column mapped to TIMESTAMP, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`payload` VARCHAR(") {
+		t.Fatalf("expected json degrade to VARCHAR, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(strings.Join(plan.Warnings, " "), "insert-only") && !strings.Contains(strings.Join(plan.Warnings, " "), "INSERT") {
+		t.Fatalf("expected tdengine target warning, got: %v", plan.Warnings)
+	}
+}
+
+func TestBuildPGLikeToTDenginePlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"public.metrics": {
+				{Name: "event_time", Type: "timestamp without time zone", Nullable: "NO"},
+				{Name: "name", Type: "character varying(64)", Nullable: "YES"},
+				{Name: "meta", Type: "jsonb", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "postgres", Database: "ignored"},
+		TargetConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "taos"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildPGLikeToTDenginePlan(cfg, "metrics", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildPGLikeToTDenginePlan returned error: %v", err)
+	}
+	if len(sourceCols) != 3 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `taos`.`metrics`") {
+		t.Fatalf("unexpected create sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`event_time` TIMESTAMP") {
+		t.Fatalf("expected timestamp mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`meta` VARCHAR(") {
+		t.Fatalf("expected jsonb degrade to VARCHAR, got: %s", plan.CreateTableSQL)
+	}
+}
+
+func TestBuildMySQLLikeToTDenginePlan_RejectsAutoCreateWithoutTimestampColumn(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"shop.metrics": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI"},
+				{Name: "name", Type: "varchar(64)", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "mysql", Database: "shop"},
+		TargetConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "taos"},
+		TargetTableStrategy: "smart",
+	}
+	plan, _, _, err := buildMySQLLikeToTDenginePlan(cfg, "metrics", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildMySQLLikeToTDenginePlan returned error: %v", err)
+	}
+	if plan.AutoCreate {
+		t.Fatalf("expected auto create disabled when source has no timestamp column")
+	}
+	if !strings.Contains(plan.PlannedAction, "时间列") {
+		t.Fatalf("unexpected planned action: %s", plan.PlannedAction)
+	}
+	if !strings.Contains(strings.Join(plan.Warnings, " "), "时间列") {
+		t.Fatalf("expected missing timestamp warning, got: %v", plan.Warnings)
+	}
+}
+
+func TestBuildClickHouseToTDenginePlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"analytics.metrics": {
+				{Name: "event_time", Type: "DateTime64(3)", Nullable: "NO"},
+				{Name: "host", Type: "FixedString(64)", Nullable: "YES"},
+				{Name: "payload", Type: "Map(String,String)", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "clickhouse", Database: "analytics"},
+		TargetConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "taos"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildClickHouseToTDenginePlan(cfg, "metrics", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildClickHouseToTDenginePlan returned error: %v", err)
+	}
+	if len(sourceCols) != 3 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `taos`.`metrics`") {
+		t.Fatalf("unexpected create sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`event_time` TIMESTAMP") {
+		t.Fatalf("expected datetime64 mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`host` VARCHAR(64)") {
+		t.Fatalf("expected fixedstring mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`payload` VARCHAR(") {
+		t.Fatalf("expected complex type degrade to VARCHAR, got: %s", plan.CreateTableSQL)
+	}
+}
+
+func TestBuildClickHouseToPGLikePlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"analytics.metrics": {
+				{Name: "id", Type: "UInt64", Nullable: "NO", Key: "PRI"},
+				{Name: "event_time", Type: "DateTime64(3)", Nullable: "NO"},
+				{Name: "host", Type: "FixedString(64)", Nullable: "YES"},
+				{Name: "payload", Type: "Map(String,String)", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "clickhouse", Database: "analytics"},
+		TargetConfig:        connection.ConnectionConfig{Type: "postgres", Database: "public"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildClickHouseToPGLikePlan(cfg, "metrics", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildClickHouseToPGLikePlan returned error: %v", err)
+	}
+	if len(sourceCols) != 4 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, `CREATE TABLE "public"."metrics"`) {
+		t.Fatalf("unexpected create sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `"id" numeric(20,0)`) {
+		t.Fatalf("expected uint64 safeguard mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `"event_time" timestamp`) {
+		t.Fatalf("expected datetime64 mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `"host" varchar(64)`) {
+		t.Fatalf("expected fixedstring mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `"payload" jsonb`) {
+		t.Fatalf("expected complex type degrade to jsonb, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, `PRIMARY KEY ("id")`) {
+		t.Fatalf("expected primary key preservation, got: %s", plan.CreateTableSQL)
+	}
+}
+
+func TestBuildPGLikeToClickHousePlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"public.orders": {
+				{Name: "id", Type: "bigint", Nullable: "NO", Key: "PRI"},
+				{Name: "created_at", Type: "timestamp without time zone", Nullable: "NO"},
+				{Name: "profile", Type: "jsonb", Nullable: "YES"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "postgres", Database: "public"},
+		TargetConfig:        connection.ConnectionConfig{Type: "clickhouse", Database: "analytics"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildPGLikeToClickHousePlan(cfg, "orders", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildPGLikeToClickHousePlan returned error: %v", err)
+	}
+	if len(sourceCols) != 3 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `analytics`.`orders`") {
+		t.Fatalf("unexpected create sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`created_at` DateTime") {
+		t.Fatalf("expected timestamp mapping, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`profile` Nullable(String)") {
+		t.Fatalf("expected jsonb degrade to Nullable(String), got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "ORDER BY (`id`)") {
+		t.Fatalf("expected primary key order by, got: %s", plan.CreateTableSQL)
+	}
+}
+
+func TestBuildTDengineToTDenginePlan_AutoCreateWhenTargetMissing(t *testing.T) {
+	t.Parallel()
+
+	sourceDB := &fakeMigrationDB{
+		columns: map[string][]connection.ColumnDefinition{
+			"src.cpu": {
+				{Name: "ts", Type: "TIMESTAMP", Nullable: "NO"},
+				{Name: "host", Type: "NCHAR(64)", Nullable: "YES"},
+				{Name: "region", Type: "NCHAR(32)", Nullable: "YES", Key: "TAG"},
+			},
+		},
+	}
+	targetDB := &fakeMigrationDB{}
+	cfg := SyncConfig{
+		SourceConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "src"},
+		TargetConfig:        connection.ConnectionConfig{Type: "tdengine", Database: "dst"},
+		TargetTableStrategy: "smart",
+	}
+	plan, sourceCols, targetCols, err := buildTDengineToTDenginePlan(cfg, "cpu", sourceDB, targetDB)
+	if err != nil {
+		t.Fatalf("buildTDengineToTDenginePlan returned error: %v", err)
+	}
+	if len(sourceCols) != 3 || len(targetCols) != 0 {
+		t.Fatalf("unexpected columns lengths: source=%d target=%d", len(sourceCols), len(targetCols))
+	}
+	if !plan.AutoCreate {
+		t.Fatalf("expected auto create enabled")
+	}
+	if !strings.Contains(plan.CreateTableSQL, "CREATE TABLE `dst`.`cpu`") {
+		t.Fatalf("unexpected create sql: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`ts` TIMESTAMP") {
+		t.Fatalf("expected timestamp preserved, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(plan.CreateTableSQL, "`region` NCHAR(32)") {
+		t.Fatalf("expected tag degrade to regular nchar column, got: %s", plan.CreateTableSQL)
+	}
+	if !strings.Contains(strings.Join(plan.Warnings, " "), "TAG") {
+		t.Fatalf("expected TAG degrade warning, got: %v", plan.Warnings)
+	}
+}

internal/sync/schema_sync.go

@@ -7,15 +7,16 @@ import (
 )
 
 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))
+	targetType := resolveMigrationDBType(config.TargetConfig)
 	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)
+	sourceType := resolveMigrationDBType(config.SourceConfig)
+	sourceSchema, sourceTable := normalizeSchemaAndTable(sourceType, config.SourceConfig.Database, tableName)
+	targetSchema, targetTable := normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	targetQueryTable := qualifiedNameForQuery(targetType, targetSchema, targetTable, tableName)
 
 	// 1) 获取源表字段
 	sourceCols, err := sourceDB.GetColumns(sourceSchema, sourceTable)
@@ -26,7 +27,6 @@ func (s *SyncEngine) syncTableSchema(config SyncConfig, res *SyncResult, sourceD
 	// 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)
 		}
@@ -62,7 +62,6 @@ func (s *SyncEngine) syncTableSchema(config SyncConfig, res *SyncResult, sourceD
 
 	// 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 == "" {

internal/sync/sql_helpers.go

@@ -22,7 +22,7 @@ func quoteIdentByType(dbType string, ident string) string {
 	}
 
 	switch dbType {
-	case "mysql", "mariadb", "diros", "sphinx":
+	case "mysql", "mariadb", "diros", "sphinx", "clickhouse", "tdengine":
 		return "`" + strings.ReplaceAll(ident, "`", "``") + "`"
 	case "sqlserver":
 		escaped := strings.ReplaceAll(ident, "]", "]]")
@@ -74,8 +74,10 @@ func normalizeSchemaAndTable(dbType string, dbName string, tableName string) (st
 	}
 
 	switch strings.ToLower(strings.TrimSpace(dbType)) {
-	case "postgres", "kingbase", "vastbase":
+	case "postgres", "kingbase", "highgo", "vastbase":
 		return "public", rawTable
+	case "duckdb":
+		return "main", rawTable
 	default:
 		return rawDB, rawTable
 	}
@@ -91,7 +93,7 @@ func qualifiedNameForQuery(dbType string, schema string, table string, original
 	}
 
 	switch strings.ToLower(strings.TrimSpace(dbType)) {
-	case "postgres", "kingbase", "vastbase":
+	case "postgres", "kingbase", "highgo", "vastbase":
 		s := strings.TrimSpace(schema)
 		if s == "" {
 			s = "public"
@@ -100,7 +102,16 @@ func qualifiedNameForQuery(dbType string, schema string, table string, original
 			return raw
 		}
 		return s + "." + table
-	case "mysql", "mariadb", "diros", "sphinx":
+	case "duckdb":
+		s := strings.TrimSpace(schema)
+		if s == "" {
+			s = "main"
+		}
+		if table == "" {
+			return raw
+		}
+		return s + "." + table
+	case "mysql", "mariadb", "diros", "sphinx", "clickhouse", "tdengine":
 		s := strings.TrimSpace(schema)
 		if s == "" || table == "" {
 			return table

internal/sync/sync_engine.go

@@ -12,14 +12,17 @@ import (
 
 // SyncConfig defines the parameters for a synchronization task
 type SyncConfig struct {
-	SourceConfig   connection.ConnectionConfig `json:"sourceConfig"`
-	TargetConfig   connection.ConnectionConfig `json:"targetConfig"`
-	Tables         []string                    `json:"tables"`            // Tables to sync
-	Content        string                      `json:"content,omitempty"` // "data", "schema", "both"
-	Mode           string                      `json:"mode"`              // "insert_update", "insert_only", "full_overwrite"
-	JobID          string                      `json:"jobId,omitempty"`
-	AutoAddColumns bool                        `json:"autoAddColumns,omitempty"` // 自动补齐缺失字段（当前仅 MySQL 目标支持）
-	TableOptions   map[string]TableOptions     `json:"tableOptions,omitempty"`
+	SourceConfig        connection.ConnectionConfig `json:"sourceConfig"`
+	TargetConfig        connection.ConnectionConfig `json:"targetConfig"`
+	Tables              []string                    `json:"tables"`
+	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
+	TargetTableStrategy string                      `json:"targetTableStrategy,omitempty"`
+	CreateIndexes       bool                        `json:"createIndexes,omitempty"`
+	MongoCollectionName string                      `json:"mongoCollectionName,omitempty"`
+	TableOptions        map[string]TableOptions     `json:"tableOptions,omitempty"`
 }
 
 // SyncResult holds the result of the sync operation
@@ -45,6 +48,13 @@ func NewSyncEngine(reporter Reporter) *SyncEngine {
 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))
+	if isRedisToMongoKeyspacePair(config) {
+		return s.runRedisToMongoSync(config, result)
+	}
+	if isMongoToRedisKeyspacePair(config) {
+		return s.runMongoToRedisSync(config, result)
+	}
+
 	totalTables := len(config.Tables)
 	s.progress(config.JobID, 0, totalTables, "", "开始同步")
 
@@ -70,6 +80,7 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 		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)
+	strategy := normalizeTargetTableStrategy(config.TargetTableStrategy)
 
 	contentLabel := "仅同步数据"
 	if syncSchema && syncData {
@@ -77,9 +88,9 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 	} 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))
+	s.appendLog(config.JobID, &result, "info", fmt.Sprintf("同步内容：%s；模式：%s；自动补字段：%v；目标表策略：%s；创建索引：%v", contentLabel, defaultMode, config.AutoAddColumns, strategy, config.CreateIndexes))
 
-	sourceDB, err := db.NewDatabase(config.SourceConfig.Type)
+	sourceDB, err := newSyncDatabase(config.SourceConfig.Type)
 	if err != nil {
 		logger.Error(err, "初始化源数据库驱动失败：类型=%s", config.SourceConfig.Type)
 		return s.fail(config.JobID, totalTables, result, "初始化源数据库驱动失败: "+err.Error())
@@ -88,7 +99,7 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 		// Custom DB setup would go here if needed
 	}
 
-	targetDB, err := db.NewDatabase(config.TargetConfig.Type)
+	targetDB, err := newSyncDatabase(config.TargetConfig.Type)
 	if err != nil {
 		logger.Error(err, "初始化目标数据库驱动失败：类型=%s", config.TargetConfig.Type)
 		return s.fail(config.JobID, totalTables, result, "初始化目标数据库驱动失败: "+err.Error())
@@ -112,7 +123,6 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 	}
 	defer targetDB.Close()
 
-	// Iterate Tables
 	for i, tableName := range config.Tables {
 		func() {
 			tableMode := defaultMode
@@ -120,30 +130,82 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 			s.progress(config.JobID, i, totalTables, tableName, fmt.Sprintf("同步表(%d/%d)", i+1, totalTables))
 			defer s.progress(config.JobID, i+1, totalTables, tableName, "表处理完成")
 
-			if syncSchema {
-				s.progress(config.JobID, i, totalTables, tableName, "同步表结构")
-				if err := s.syncTableSchema(config, &result, sourceDB, targetDB, tableName); err != nil {
-					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("表结构同步失败：表=%s 错误=%v", tableName, err))
+			plan, cols, targetCols, err := buildSchemaMigrationPlan(config, tableName, sourceDB, targetDB)
+			if err != nil {
+				s.appendLog(config.JobID, &result, "error", fmt.Sprintf("生成迁移计划失败：表=%s 错误=%v", tableName, err))
+				return
+			}
+			for _, warning := range plan.Warnings {
+				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> %s", warning))
+			}
+			for _, unsupported := range plan.UnsupportedObjects {
+				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> %s", unsupported))
+			}
+			if strings.TrimSpace(plan.PlannedAction) != "" {
+				s.appendLog(config.JobID, &result, "info", fmt.Sprintf("  -> %s", plan.PlannedAction))
+			}
+
+			if !plan.TargetTableExists && !plan.AutoCreate {
+				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("表 %s 目标表不存在，当前策略不允许自动建表，已跳过", tableName))
+				return
+			}
+
+			if !plan.TargetTableExists && plan.AutoCreate {
+				s.progress(config.JobID, i, totalTables, tableName, "创建目标表")
+				if len(plan.PreDataSQL) > 0 {
+					if err := executeSQLStatements(targetDB.Exec, plan.PreDataSQL); err != nil {
+						s.appendLog(config.JobID, &result, "error", fmt.Sprintf("预执行建表 SQL 失败：表=%s 错误=%v", tableName, err))
+						return
+					}
+				}
+				if strings.TrimSpace(plan.CreateTableSQL) == "" {
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("表 %s 自动建表失败：建表 SQL 为空", tableName))
 					return
 				}
+				if _, err := targetDB.Exec(plan.CreateTableSQL); err != nil {
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("创建目标表失败：表=%s 错误=%v", tableName, err))
+					return
+				}
+				s.appendLog(config.JobID, &result, "info", fmt.Sprintf("目标表创建成功：%s", tableName))
+				targetCols, err = targetDB.GetColumns(plan.TargetSchema, plan.TargetTable)
+				if err != nil {
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("创建目标表后获取字段失败：表=%s 错误=%v", tableName, err))
+					return
+				}
+			} else if len(plan.PreDataSQL) > 0 {
+				s.progress(config.JobID, i, totalTables, tableName, "同步表结构")
+				if err := executeSQLStatements(targetDB.Exec, plan.PreDataSQL); err != nil {
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("同步表结构失败：表=%s 错误=%v", tableName, err))
+					return
+				}
+				targetCols, err = targetDB.GetColumns(plan.TargetSchema, plan.TargetTable)
+				if err != nil {
+					s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("补字段后刷新目标字段失败：表=%s 错误=%v", tableName, err))
+				}
 			}
+
 			if !syncData {
+				if len(plan.PostDataSQL) > 0 {
+					s.progress(config.JobID, i, totalTables, tableName, "创建索引")
+					if err := executeSQLStatements(targetDB.Exec, plan.PostDataSQL); err != nil {
+						s.appendLog(config.JobID, &result, "error", fmt.Sprintf("创建索引失败：表=%s 错误=%v", tableName, err))
+						return
+					}
+				}
 				result.TablesSynced++
 				return
 			}
 
-			sourceSchema, sourceTable := normalizeSchemaAndTable(config.SourceConfig.Type, config.SourceConfig.Database, tableName)
-			targetSchema, targetTable := normalizeSchemaAndTable(config.TargetConfig.Type, config.TargetConfig.Database, tableName)
-			sourceQueryTable := qualifiedNameForQuery(config.SourceConfig.Type, sourceSchema, sourceTable, tableName)
-			targetQueryTable := qualifiedNameForQuery(config.TargetConfig.Type, targetSchema, targetTable, tableName)
-
-			// 1. Get Columns & PKs
-			cols, err := sourceDB.GetColumns(sourceSchema, sourceTable)
-			if err != nil {
-				logger.Error(err, "获取源表列信息失败：表=%s", tableName)
-				s.appendLog(config.JobID, &result, "error", fmt.Sprintf("获取表 %s 的列信息失败: %v", tableName, err))
-				return
+			targetType := resolveMigrationDBType(config.TargetConfig)
+			sourceType := resolveMigrationDBType(config.SourceConfig)
+			targetTable := plan.TargetTable
+			sourceQueryTable, targetQueryTable := plan.SourceQueryTable, plan.TargetQueryTable
+			applyTableName := targetTable
+			switch targetType {
+			case "postgres", "kingbase", "highgo", "vastbase", "sqlserver":
+				applyTableName = targetQueryTable
 			}
+
 			sourceColsByLower := make(map[string]connection.ColumnDefinition, len(cols))
 			for _, col := range cols {
 				if strings.TrimSpace(col.Name) == "" {
@@ -158,25 +220,24 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 					pkCols = append(pkCols, col.Name)
 				}
 			}
-
-			if len(pkCols) == 0 {
-				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("表 %s 未找到主键，已跳过数据同步（避免产生重复数据）", tableName))
-				return
+			requirePK := tableMode == "insert_update" && plan.TargetTableExists
+			pkCol := ""
+			if requirePK {
+				if len(pkCols) == 0 {
+					s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("表 %s 未找到主键，当前模式需要差异对比，已跳过", tableName))
+					return
+				}
+				if len(pkCols) > 1 {
+					s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("表 %s 为复合主键（%s），当前暂不支持差异同步", tableName, strings.Join(pkCols, ",")))
+					return
+				}
+				pkCol = pkCols[0]
 			}
-			if len(pkCols) > 1 {
-				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("表 %s 为复合主键（%s），当前暂不支持数据同步", tableName, strings.Join(pkCols, ",")))
-				return
-			}
-			pkCol := pkCols[0]
 
 			opts := TableOptions{Insert: true, Update: true, Delete: false}
 			if config.TableOptions != nil {
 				if t, ok := config.TableOptions[tableName]; ok {
 					opts = t
-					// 默认防护：如用户未设置任意一个字段，保持 insert/update 默认 true、delete 默认 false
-					if !t.Insert && !t.Update && !t.Delete {
-						opts = t
-					}
 				}
 			}
 			if !opts.Insert && !opts.Update && !opts.Delete {
@@ -184,10 +245,8 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 				return
 			}
 
-			// 2. Fetch Data (MEMORY INTENSIVE - PROTOTYPE ONLY)
-			// TODO: Implement paging/streaming
 			s.progress(config.JobID, i, totalTables, tableName, "读取源表数据")
-			sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(config.SourceConfig.Type, sourceQueryTable)))
+			sourceRows, _, err := sourceDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(sourceType, 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))
@@ -196,19 +255,19 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 
 			var inserts []map[string]interface{}
 			var updates []connection.UpdateRow
+			var deletes []map[string]interface{}
 
-			if tableMode == "insert_update" {
+			if tableMode == "insert_update" && plan.TargetTableExists {
 				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)))
+				targetRows, _, err := targetDB.Query(fmt.Sprintf("SELECT * FROM %s", quoteQualifiedIdentByType(targetType, 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{})
+				targetMap := make(map[string]map[string]interface{}, len(targetRows))
 				for _, row := range targetRows {
 					if row[pkCol] == nil {
 						continue
@@ -220,7 +279,6 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 					targetMap[pkVal] = row
 				}
 				sourcePKSet := make(map[string]struct{}, len(sourceRows))
-
 				for _, sRow := range sourceRows {
 					if sRow[pkCol] == nil {
 						continue
@@ -230,7 +288,6 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 						continue
 					}
 					sourcePKSet[pkVal] = struct{}{}
-
 					if tRow, exists := targetMap[pkVal]; exists {
 						changes := make(map[string]interface{})
 						for k, v := range sRow {
@@ -239,17 +296,12 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 							}
 						}
 						if len(changes) > 0 {
-							updates = append(updates, connection.UpdateRow{
-								Keys:   map[string]interface{}{pkCol: sRow[pkCol]},
-								Values: changes,
-							})
+							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 {
@@ -258,150 +310,49 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 						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,
+			} else {
+				inserts = sourceRows
+				if !opts.Insert {
+					inserts = nil
 				}
+				if tableMode == "full_overwrite" && plan.TargetTableExists {
+					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 targetType == "mysql" {
+						clearSQL = fmt.Sprintf("TRUNCATE TABLE %s", quoteQualifiedIdentByType(targetType, targetQueryTable))
+					} else {
+						clearSQL = fmt.Sprintf("DELETE FROM %s", quoteQualifiedIdentByType(targetType, 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(changeSet.Inserts, changeSet.Updates)
-				targetCols, err := targetDB.GetColumns(targetSchema, targetTable)
+			changeSet := connection.ChangeSet{Inserts: inserts, Updates: updates, Deletes: deletes}
+			s.progress(config.JobID, i, totalTables, tableName, "检查字段一致性")
+			targetColsResolved := targetCols
+			if len(targetColsResolved) == 0 {
+				targetColsResolved, err = targetDB.GetColumns(plan.TargetSchema, plan.TargetTable)
 				if err != nil {
 					s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 获取目标表字段失败，已跳过字段一致性检查: %v", err))
-				} else {
-					targetColSet := make(map[string]struct{}, len(targetCols))
-					for _, c := range targetCols {
-						name := strings.ToLower(strings.TrimSpace(c.Name))
-						if name == "" {
-							continue
-						}
-						targetColSet[name] = struct{}{}
-					}
-
-					missing := make([]string, 0)
-					for lower, original := range requiredCols {
-						if _, ok := targetColSet[lower]; !ok {
-							missing = append(missing, original)
-						}
-					}
-					sort.Strings(missing)
-
-					if len(missing) > 0 {
-						if config.AutoAddColumns && strings.ToLower(strings.TrimSpace(config.TargetConfig.Type)) == "mysql" {
-							s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 目标表缺少字段 %d 个，开始自动补齐: %s", len(missing), strings.Join(missing, ", ")))
-							added := 0
-							for _, colName := range missing {
-								colLower := strings.ToLower(strings.TrimSpace(colName))
-								colType := "TEXT"
-								if strings.ToLower(strings.TrimSpace(config.SourceConfig.Type)) == "mysql" {
-									if srcCol, ok := sourceColsByLower[colLower]; ok {
-										colType = sanitizeMySQLColumnType(srcCol.Type)
-									}
-								}
-
-								alterSQL := fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s NULL",
-									quoteQualifiedIdentByType("mysql", targetQueryTable),
-									quoteIdentByType("mysql", colName),
-									colType,
-								)
-								if _, err := targetDB.Exec(alterSQL); err != nil {
-									s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 自动补字段失败：字段=%s 错误=%v", colName, err))
-									continue
-								}
-								added++
-							}
-							s.appendLog(config.JobID, &result, "info", fmt.Sprintf("  -> 自动补字段完成：成功=%d 失败=%d", added, len(missing)-added))
-
-							// refresh columns
-							targetCols, err = targetDB.GetColumns(targetSchema, targetTable)
-							if err == nil {
-								targetColSet = make(map[string]struct{}, len(targetCols))
-								for _, c := range targetCols {
-									name := strings.ToLower(strings.TrimSpace(c.Name))
-									if name == "" {
-										continue
-									}
-									targetColSet[name] = struct{}{}
-								}
-							}
-						} else {
-							s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 目标表缺少字段 %d 个（未开启自动补齐），将自动忽略：%s", len(missing), strings.Join(missing, ", ")))
-						}
-
-						// filter out still-missing columns to avoid apply failure
-						changeSet.Inserts = filterInsertRows(changeSet.Inserts, targetColSet)
-						changeSet.Updates = filterUpdateRows(changeSet.Updates, targetColSet)
-					}
-				}
-
-				// 5. Apply Changes
-				s.progress(config.JobID, i, totalTables, tableName, "应用变更")
-
-				if len(changeSet.Inserts) > 0 || len(changeSet.Updates) > 0 || len(changeSet.Deletes) > 0 {
-					s.appendLog(config.JobID, &result, "info", fmt.Sprintf("  -> 需插入: %d 行, 需更新: %d 行, 需删除: %d 行", len(changeSet.Inserts), len(changeSet.Updates), len(changeSet.Deletes)))
-
-					if applier, ok := targetDB.(db.BatchApplier); ok {
-						if err := applier.ApplyChanges(targetTable, changeSet); err != nil {
-							s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 应用变更失败: %v", err))
-						} else {
-							result.RowsInserted += len(changeSet.Inserts)
-							result.RowsUpdated += len(changeSet.Updates)
-							result.RowsDeleted += len(changeSet.Deletes)
-						}
-					} else {
-						s.appendLog(config.JobID, &result, "warn", "  -> 目标驱动不支持应用数据变更 (ApplyChanges).")
-					}
-				} else {
-					s.appendLog(config.JobID, &result, "info", "  -> 数据一致，无需变更.")
-				}
-
-				result.TablesSynced++
-				return
-			} else {
-				// insert_only / full_overwrite: do not compare target, just insert source rows
-				inserts = sourceRows
-			}
-
-			// full_overwrite: clear target table first
-			if tableMode == "full_overwrite" {
-				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 全量覆盖模式：即将清空目标表 %s", tableName))
-				s.progress(config.JobID, i, totalTables, tableName, "清空目标表")
-				clearSQL := ""
-				if strings.ToLower(strings.TrimSpace(config.TargetConfig.Type)) == "mysql" {
-					clearSQL = fmt.Sprintf("TRUNCATE TABLE %s", quoteQualifiedIdentByType(config.TargetConfig.Type, targetQueryTable))
-				} else {
-					clearSQL = fmt.Sprintf("DELETE FROM %s", quoteQualifiedIdentByType(config.TargetConfig.Type, targetQueryTable))
-				}
-				if _, err := targetDB.Exec(clearSQL); err != nil {
-					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("  -> 清空目标表失败: %v", err))
-					return
 				}
 			}
-
-			// 4. Align schema (target missing columns)
-			s.progress(config.JobID, i, totalTables, tableName, "检查字段一致性")
-			requiredCols := collectRequiredColumns(inserts, updates)
-			targetCols, err := targetDB.GetColumns(targetSchema, targetTable)
-			if err != nil {
-				s.appendLog(config.JobID, &result, "warn", fmt.Sprintf("  -> 获取目标表字段失败，已跳过字段一致性检查: %v", err))
-			} else {
-				targetColSet := make(map[string]struct{}, len(targetCols))
-				for _, c := range targetCols {
+			if len(targetColsResolved) > 0 {
+				targetColSet := make(map[string]struct{}, len(targetColsResolved))
+				for _, c := range targetColsResolved {
 					name := strings.ToLower(strings.TrimSpace(c.Name))
 					if name == "" {
 						continue
 					}
 					targetColSet[name] = struct{}{}
 				}
-
+				requiredCols := collectRequiredColumns(changeSet.Inserts, changeSet.Updates)
 				missing := make([]string, 0)
 				for lower, original := range requiredCols {
 					if _, ok := targetColSet[lower]; !ok {
@@ -409,79 +360,64 @@ func (s *SyncEngine) RunSync(config SyncConfig) SyncResult {
 					}
 				}
 				sort.Strings(missing)
-
 				if len(missing) > 0 {
-					if config.AutoAddColumns && strings.ToLower(strings.TrimSpace(config.TargetConfig.Type)) == "mysql" {
+					if config.AutoAddColumns && supportsAutoAddColumnsForPair(sourceType, targetType) {
 						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)
-								}
+							srcCol, ok := sourceColsByLower[colLower]
+							if !ok {
+								continue
+							}
+							alterSQL, err := buildAddColumnSQLForPair(sourceType, targetType, targetQueryTable, srcCol)
+							if 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
 							}
-
-							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++
+							targetColSet[colLower] = struct{}{}
 						}
 						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)
+					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")
-			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 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 {
+					if err := applier.ApplyChanges(applyTableName, 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)
+						return
 					}
+					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).")
+					return
 				}
 			} else {
 				s.appendLog(config.JobID, &result, "info", "  -> 数据一致，无需变更.")
 			}
 
+			if len(plan.PostDataSQL) > 0 {
+				s.progress(config.JobID, i, totalTables, tableName, "创建索引")
+				if err := executeSQLStatements(targetDB.Exec, plan.PostDataSQL); err != nil {
+					s.appendLog(config.JobID, &result, "error", fmt.Sprintf("创建索引失败：表=%s 错误=%v", tableName, err))
+					return
+				}
+			}
+
 			result.TablesSynced++
 		}()
 	}
@@ -554,3 +490,26 @@ func (s *SyncEngine) fail(jobID string, totalTables int, res SyncResult, msg str
 	s.progress(jobID, res.TablesSynced, totalTables, "", "同步失败")
 	return res
 }
+
+func (s *SyncEngine) execDDLStatements(jobID string, res *SyncResult, database db.Database, tableName string, stage string, statements []string) error {
+	for _, statement := range statements {
+		sqlText := strings.TrimSpace(statement)
+		if sqlText == "" {
+			continue
+		}
+		if _, err := database.Exec(sqlText); err != nil {
+			return fmt.Errorf("%s失败: %w", stage, err)
+		}
+		s.appendLog(jobID, res, "info", fmt.Sprintf("表 %s %s成功：%s", tableName, stage, shortenSyncSQL(sqlText)))
+	}
+	return nil
+}
+
+func shortenSyncSQL(sqlText string) string {
+	text := strings.TrimSpace(strings.ReplaceAll(strings.ReplaceAll(sqlText, "\n", " "), "\t", " "))
+	text = strings.Join(strings.Fields(text), " ")
+	if len(text) <= 120 {
+		return text
+	}
+	return text[:117] + "..."
+}

internal/sync/sync_events.go

@@ -27,4 +27,3 @@ type Reporter struct {
 	OnLog      func(event SyncLogEvent)
 	OnProgress func(event SyncProgressEvent)
 }
-