🐛 fix(frontend): 修复 DuckDB 对象编辑与安全修改回归

- 修复 DuckDB qualified table 在查询结果页丢失 schema 导致无法识别主键的问题

- 打开对象修改前强制刷新最新定义，并避免切换对象失败时沿用旧定义

- 为 DuckDB 元数据链路补充前后端回归测试，并给 app 层真实 runtime 测试增加环境门槛

frontend/src/components/DataViewer.primary-key.test.tsx

@@ -317,6 +317,28 @@ describe('DataViewer safe editing locator', () => {
     renderer.unmount();
   });
 
+  it('keeps DuckDB table preview writable when primary key metadata arrives for a qualified table name', async () => {
+    storeState.connections[0].config.type = 'duckdb';
+    storeState.connections[0].config.database = 'main';
+    backendApp.DBGetColumns.mockResolvedValue({
+      success: true,
+      data: [{ name: 'id', key: 'PRI' }, { name: 'name', key: '' }],
+    });
+
+    const renderer = await renderAndReload(createTab({ id: 'tab-duckdb-pri', dbName: 'main', tableName: 'main.events', title: 'events' }));
+
+    expect(dataGridState.latestProps?.pkColumns).toEqual(['id']);
+    expect(dataGridState.latestProps?.editLocator).toMatchObject({
+      strategy: 'primary-key',
+      columns: ['id'],
+      valueColumns: ['id'],
+      readOnly: false,
+    });
+    expect(dataGridState.latestProps?.readOnly).toBe(false);
+    expect(messageApi.warning).not.toHaveBeenCalled();
+    renderer.unmount();
+  });
+
   it('invalidates a stale known total when table data grows after a manual refresh', async () => {
     storeState.connections[0].config.type = 'mysql';
     storeState.connections[0].config.database = 'main';

frontend/src/components/DefinitionViewer.object-edit.test.tsx

@@ -88,6 +88,7 @@ describe('DefinitionViewer object edit entry', () => {
     storeState.setActiveContext.mockReset();
     storeState.theme = 'light';
     storeState.connections[0].config.type = 'postgres';
+    backendApp.DBQuery.mockReset();
     backendApp.DBQuery.mockResolvedValue({
       success: true,
       data: [{ view_definition: 'SELECT id, name FROM users' }],
@@ -213,4 +214,101 @@ describe('DefinitionViewer object edit entry', () => {
     expect(query).toContain('v_count PLS_INTEGER;');
     expect(query).toContain('SELECT COUNT(*) INTO v_count FROM dual;');
   });
+
+  it('reloads the latest object definition before opening object edit', async () => {
+    backendApp.DBQuery
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ view_definition: 'SELECT id FROM users' }],
+      })
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ view_definition: 'SELECT id, name, updated_at FROM users' }],
+      });
+
+    let renderer: any;
+    await act(async () => {
+      renderer = create(<DefinitionViewer tab={createTab()} />);
+      await flushPromises();
+    });
+
+    const button = renderer.root.findAll((node: any) => node.type === 'button' && findButtonText(node).includes('对象修改'))[0];
+
+    await act(async () => {
+      await button.props.onClick();
+      await flushPromises();
+    });
+
+    expect(backendApp.DBQuery).toHaveBeenCalledTimes(2);
+    const query = storeState.addTab.mock.calls[0][0].query;
+    expect(query).toContain('SELECT id, name, updated_at FROM users;');
+    expect(query).not.toContain('SELECT id FROM users;');
+
+    const editor = renderer.root.findAll((node: any) => node.props['data-editor'] === 'true')[0];
+    expect(String(editor.children.join(''))).toContain('SELECT id, name, updated_at FROM users');
+  });
+
+  it('keeps the current definition visible when refresh for object edit fails', async () => {
+    backendApp.DBQuery
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ view_definition: 'SELECT id, name FROM users' }],
+      })
+      .mockResolvedValueOnce({
+        success: false,
+        message: 'network down',
+        data: [],
+      });
+
+    let renderer: any;
+    await act(async () => {
+      renderer = create(<DefinitionViewer tab={createTab()} />);
+      await flushPromises();
+    });
+
+    const button = renderer.root.findAll((node: any) => node.type === 'button' && findButtonText(node).includes('对象修改'))[0];
+
+    await act(async () => {
+      await button.props.onClick();
+      await flushPromises();
+    });
+
+    expect(storeState.addTab).not.toHaveBeenCalled();
+    expect(String(renderer.root.findAll((node: any) => node.props['data-editor'] === 'true')[0].children.join(''))).toContain('SELECT id, name FROM users');
+    expect(findButtonText(renderer.root)).toContain('刷新最新定义失败');
+    expect(findButtonText(renderer.root)).toContain('network down');
+  });
+
+  it('does not keep the previous object definition when switching objects and the new load fails', async () => {
+    backendApp.DBQuery
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ view_definition: 'SELECT id, name FROM users' }],
+      })
+      .mockResolvedValueOnce({
+        success: false,
+        message: 'load failed',
+        data: [],
+      });
+
+    let renderer: any;
+    await act(async () => {
+      renderer = create(<DefinitionViewer tab={createTab()} />);
+      await flushPromises();
+    });
+
+    await act(async () => {
+      renderer.update(<DefinitionViewer tab={createTab({
+        id: 'view-def-conn-1-main-reporting.archived_users',
+        title: '视图: reporting.archived_users',
+        viewName: 'reporting.archived_users',
+      })} />);
+      await flushPromises();
+    });
+
+    expect(findButtonText(renderer.root)).toContain('加载失败');
+    expect(findButtonText(renderer.root)).toContain('load failed');
+    expect(renderer.root.findAll((node: any) => node.props['data-editor'] === 'true')).toHaveLength(0);
+    expect(findButtonText(renderer.root)).not.toContain('SELECT id, name FROM users');
+  });
 });

frontend/src/components/DefinitionViewer.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react';
+import React, { useState, useEffect, useRef } from 'react';
 import Editor from './MonacoEditor';
 import { Button, Spin, Alert } from 'antd';
 import { EditOutlined } from '@ant-design/icons';
@@ -69,12 +69,25 @@ const DefinitionViewer: React.FC<DefinitionViewerProps> = ({ tab }) => {
     const [loading, setLoading] = useState(true);
     const [error, setError] = useState<string | null>(null);
     const [definition, setDefinition] = useState<string>('');
+    const [openingObjectEdit, setOpeningObjectEdit] = useState(false);
+    const isMountedRef = useRef(true);
+    const loadedDefinitionKeyRef = useRef('');
 
     const connections = useStore(state => state.connections);
     const theme = useStore(state => state.theme);
     const addTab = useStore(state => state.addTab);
     const setActiveContext = useStore(state => state.setActiveContext);
     const darkMode = theme === 'dark';
+    const objectIdentityKey = [
+        tab.connectionId,
+        tab.dbName,
+        tab.type,
+        tab.viewName,
+        tab.viewKind,
+        tab.eventName,
+        tab.routineName,
+        tab.routineType,
+    ].map((item) => String(item || '')).join('||');
 
     const escapeSQLLiteral = (raw: string): string => String(raw || '').replace(/'/g, "''");
 
@@ -446,107 +459,122 @@ const DefinitionViewer: React.FC<DefinitionViewerProps> = ({ tab }) => {
         }
     };
 
-    useEffect(() => {
-        const loadDefinition = async () => {
-            setLoading(true);
-            setError(null);
+    const loadDefinition = async (): Promise<{ success: boolean; definition?: string; error?: string }> => {
+        const conn = connections.find(c => c.id === tab.connectionId);
+        if (!conn) {
+            return { success: false, error: '未找到数据库连接' };
+        }
 
-            const conn = connections.find(c => c.id === tab.connectionId);
-            if (!conn) {
-                setError('未找到数据库连接');
-                setLoading(false);
-                return;
+        const dbName = tab.dbName || '';
+        const dialect = getMetadataDialect(conn);
+        const sphinxLike = isSphinxConnection(conn) && dialect === 'mysql';
+
+        let queries: string[];
+        let extractFn: (dialect: string, data: any[]) => string;
+        let resolvedObjectLabel: string;
+
+        if (tab.type === 'view-def') {
+            const viewName = tab.viewName || '';
+            if (!viewName) {
+                return { success: false, error: '视图名称为空' };
+            }
+            queries = buildShowViewQueries(dialect, viewName, dbName, tab.viewKind);
+            extractFn = extractViewDefinition;
+            resolvedObjectLabel = tab.viewKind === 'materialized' ? '物化视图' : '视图';
+        } else if (tab.type === 'event-def') {
+            const eventName = tab.eventName || '';
+            if (!eventName) {
+                return { success: false, error: '事件名称为空' };
+            }
+            queries = buildShowEventQueries(dialect, eventName, dbName);
+            extractFn = extractEventDefinition;
+            resolvedObjectLabel = '事件';
+        } else {
+            const routineName = tab.routineName || '';
+            const routineType = tab.routineType || 'FUNCTION';
+            if (!routineName) {
+                return { success: false, error: '函数/存储过程名称为空' };
+            }
+            queries = buildShowRoutineQueries(dialect, routineName, routineType, dbName);
+            extractFn = extractRoutineDefinition;
+            resolvedObjectLabel = '函数/存储过程';
+        }
+
+        if (!queries.length || String(queries[0] || '').startsWith('--')) {
+            return { success: true, definition: String(queries[0] || '-- 暂不支持该对象定义查看') };
+        }
+
+        try {
+            const config = {
+                ...conn.config,
+                port: Number(conn.config.port),
+                password: conn.config.password || '',
+                database: conn.config.database || '',
+                useSSH: conn.config.useSSH || false,
+                ssh: conn.config.ssh || { host: '', port: 22, user: '', password: '', keyPath: '' }
+            };
+
+            const result = await runQueryCandidates(config, dbName, queries);
+
+            if (result.success && Array.isArray(result.data) && result.data.length > 0) {
+                return { success: true, definition: extractFn(dialect, result.data) };
             }
 
-            const dbName = tab.dbName || '';
-            const dialect = getMetadataDialect(conn);
-            const sphinxLike = isSphinxConnection(conn) && dialect === 'mysql';
-
-            let queries: string[];
-            let extractFn: (dialect: string, data: any[]) => string;
-            let objectLabel: string;
-
-            if (tab.type === 'view-def') {
-                const viewName = tab.viewName || '';
-                if (!viewName) {
-                    setError('视图名称为空');
-                    setLoading(false);
-                    return;
-                }
-                queries = buildShowViewQueries(dialect, viewName, dbName, tab.viewKind);
-                extractFn = extractViewDefinition;
-                objectLabel = tab.viewKind === 'materialized' ? '物化视图' : '视图';
-            } else if (tab.type === 'event-def') {
-                const eventName = tab.eventName || '';
-                if (!eventName) {
-                    setError('事件名称为空');
-                    setLoading(false);
-                    return;
-                }
-                queries = buildShowEventQueries(dialect, eventName, dbName);
-                extractFn = extractEventDefinition;
-                objectLabel = '事件';
-            } else {
-                const routineName = tab.routineName || '';
-                const routineType = tab.routineType || 'FUNCTION';
-                if (!routineName) {
-                    setError('函数/存储过程名称为空');
-                    setLoading(false);
-                    return;
-                }
-                queries = buildShowRoutineQueries(dialect, routineName, routineType, dbName);
-                extractFn = extractRoutineDefinition;
-                objectLabel = '函数/存储过程';
-            }
-
-            if (!queries.length || String(queries[0] || '').startsWith('--')) {
-                setDefinition(String(queries[0] || '-- 暂不支持该对象定义查看'));
-                setLoading(false);
-                return;
-            }
-
-            try {
-                const config = {
-                    ...conn.config,
-                    port: Number(conn.config.port),
-                    password: conn.config.password || '',
-                    database: conn.config.database || '',
-                    useSSH: conn.config.useSSH || false,
-                    ssh: conn.config.ssh || { host: '', port: 22, user: '', password: '', keyPath: '' }
-                };
-
-                const result = await runQueryCandidates(config, dbName, queries);
-
-                if (result.success && Array.isArray(result.data) && result.data.length > 0) {
-                    const def = extractFn(dialect, result.data);
-                    setDefinition(def);
-                    return;
-                }
-
-                if (result.success) {
-                    if (sphinxLike) {
-                        const version = await getVersionHint(config, dbName);
-                        const versionText = version ? `（版本: ${version}）` : '';
-                        setDefinition(`-- 当前 Sphinx 实例${versionText}未返回${objectLabel}定义。\n-- 已执行多套兼容查询，可能是版本能力限制或对象类型不支持。`);
-                        return;
-                    }
-                    setDefinition(`-- 未找到${objectLabel}定义`);
-                } else if (sphinxLike) {
+            if (result.success) {
+                if (sphinxLike) {
                     const version = await getVersionHint(config, dbName);
                     const versionText = version ? `（版本: ${version}）` : '';
-                    setDefinition(`-- 当前 Sphinx 实例${versionText}不支持${objectLabel}定义查询。\n-- 已自动尝试兼容语句，返回失败信息: ${result.message || 'unknown error'}`);
-                } else {
-                    setError(result.message || '查询定义失败');
+                    return {
+                        success: true,
+                        definition: `-- 当前 Sphinx 实例${versionText}未返回${resolvedObjectLabel}定义。\n-- 已执行多套兼容查询，可能是版本能力限制或对象类型不支持。`
+                    };
                 }
-            } catch (e: any) {
-                setError('查询定义失败: ' + (e?.message || String(e)));
-            } finally {
-                setLoading(false);
+                return { success: true, definition: `-- 未找到${resolvedObjectLabel}定义` };
             }
+
+            if (sphinxLike) {
+                const version = await getVersionHint(config, dbName);
+                const versionText = version ? `（版本: ${version}）` : '';
+                return {
+                    success: true,
+                    definition: `-- 当前 Sphinx 实例${versionText}不支持${resolvedObjectLabel}定义查询。\n-- 已自动尝试兼容语句，返回失败信息: ${result.message || 'unknown error'}`
+                };
+            }
+
+            return { success: false, error: result.message || '查询定义失败' };
+        } catch (e: any) {
+            return { success: false, error: '查询定义失败: ' + (e?.message || String(e)) };
+        }
+    };
+
+    useEffect(() => {
+        let cancelled = false;
+        const syncDefinition = async () => {
+            setLoading(true);
+            setError(null);
+            const result = await loadDefinition();
+            if (cancelled) {
+                return;
+            }
+            if (result.success) {
+                loadedDefinitionKeyRef.current = objectIdentityKey;
+                setDefinition(String(result.definition || ''));
+            } else {
+                setError(result.error || '查询定义失败');
+            }
+            setLoading(false);
         };
 
-        loadDefinition();
-    }, [tab.connectionId, tab.dbName, tab.viewName, tab.viewKind, tab.eventName, tab.routineName, tab.routineType, tab.type, connections]);
+        syncDefinition();
+
+        return () => {
+            cancelled = true;
+        };
+    }, [tab.connectionId, tab.dbName, tab.viewName, tab.viewKind, tab.eventName, tab.routineName, tab.routineType, tab.type, connections, objectIdentityKey]);
+
+    useEffect(() => () => {
+        isMountedRef.current = false;
+    }, []);
 
     const objectLabel = tab.type === 'view-def'
         ? (tab.viewKind === 'materialized' ? '物化视图' : '视图')
@@ -555,20 +583,41 @@ const DefinitionViewer: React.FC<DefinitionViewerProps> = ({ tab }) => {
         ? tab.viewName
         : (tab.type === 'event-def' ? tab.eventName : tab.routineName);
     const normalizedObjectName = String(objectName || '').trim();
+    const displayedDefinition = loadedDefinitionKeyRef.current === objectIdentityKey ? definition : '';
+    const hasDefinition = String(displayedDefinition || '').trim() !== '';
 
-    const openObjectEditQuery = () => {
-        if (!normalizedObjectName) return;
+    const openObjectEditQuery = async () => {
+        if (!normalizedObjectName || openingObjectEdit) return;
         const dbName = String(tab.dbName || '').trim();
-        const query = buildEditableDefinitionSql(tab, definition, objectLabel, normalizedObjectName);
-        setActiveContext({ connectionId: tab.connectionId, dbName });
-        addTab({
-            id: `query-edit-object-${tab.connectionId}-${dbName}-${Date.now()}`,
-            title: `修改${objectLabel}: ${normalizedObjectName}`,
-            type: 'query',
-            connectionId: tab.connectionId,
-            dbName,
-            query,
-        });
+        setOpeningObjectEdit(true);
+        setError(null);
+        try {
+            const result = await loadDefinition();
+            if (!isMountedRef.current) {
+                return;
+            }
+            if (!result.success) {
+                setError(result.error || '查询定义失败');
+                return;
+            }
+            const latestDefinition = String(result.definition || '');
+            loadedDefinitionKeyRef.current = objectIdentityKey;
+            setDefinition(latestDefinition);
+            const query = buildEditableDefinitionSql(tab, latestDefinition, objectLabel, normalizedObjectName);
+            setActiveContext({ connectionId: tab.connectionId, dbName });
+            addTab({
+                id: `query-edit-object-${tab.connectionId}-${dbName}-${Date.now()}`,
+                title: `修改${objectLabel}: ${normalizedObjectName}`,
+                type: 'query',
+                connectionId: tab.connectionId,
+                dbName,
+                query,
+            });
+        } finally {
+            if (isMountedRef.current) {
+                setOpeningObjectEdit(false);
+            }
+        }
     };
 
     if (loading) {
@@ -579,7 +628,7 @@ const DefinitionViewer: React.FC<DefinitionViewerProps> = ({ tab }) => {
         );
     }
 
-    if (error) {
+    if (error && !hasDefinition) {
         return (
             <div style={{ padding: 16 }}>
                 <Alert type="error" message="加载失败" description={error} showIcon />
@@ -595,16 +644,21 @@ const DefinitionViewer: React.FC<DefinitionViewerProps> = ({ tab }) => {
                     {tab.dbName && <span style={{ marginLeft: 16, color: '#888' }}>数据库: {tab.dbName}</span>}
                     {tab.routineType && <span style={{ marginLeft: 16, color: '#888' }}>类型: {tab.routineType}</span>}
                 </div>
-                <Button size="small" icon={<EditOutlined />} onClick={openObjectEditQuery} disabled={!normalizedObjectName}>
+                <Button size="small" icon={<EditOutlined />} onClick={openObjectEditQuery} disabled={!normalizedObjectName} loading={openingObjectEdit}>
                     对象修改
                 </Button>
             </div>
+            {error && hasDefinition && (
+                <div style={{ padding: '8px 16px 0' }}>
+                    <Alert type="warning" message="刷新最新定义失败" description={error} showIcon />
+                </div>
+            )}
             <div style={{ flex: 1, minHeight: 0 }}>
                 <Editor
                     height="100%"
                     language="sql"
                     theme={darkMode ? 'transparent-dark' : 'transparent-light'}
-                    value={definition}
+                    value={displayedDefinition}
                     options={{
                         readOnly: true,
                         minimap: { enabled: false },

frontend/src/components/QueryEditor.external-sql-save.test.tsx

@@ -3320,6 +3320,49 @@ describe('QueryEditor external SQL save', () => {
     expect(messageApi.warning).not.toHaveBeenCalled();
   });
 
+  it('keeps DuckDB qualified table query results writable when primary key metadata arrives', async () => {
+    storeState.connections[0].config.type = 'duckdb';
+    storeState.connections[0].config.database = 'main';
+    backendApp.DBQueryMulti.mockResolvedValueOnce({
+      success: true,
+      data: [{ columns: ['NAME', '__gonavi_locator_1_id'], rows: [{ NAME: 'launch', __gonavi_locator_1_id: 7 }] }],
+    });
+    backendApp.DBGetColumns.mockResolvedValueOnce({
+      success: true,
+      data: [{ name: 'id', key: 'PRI' }, { name: 'name', key: '' }],
+    });
+
+    let renderer: ReactTestRenderer;
+    await act(async () => {
+      renderer = create(<QueryEditor tab={createTab({ dbName: 'main', query: 'SELECT NAME FROM main.events' })} />);
+    });
+
+    await act(async () => {
+      await findButton(renderer!, '运行').props.onClick();
+    });
+    await act(async () => {
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+
+    expect(backendApp.DBGetColumns).toHaveBeenCalledWith(expect.anything(), 'main', 'main.events');
+    expect(dataGridState.latestProps?.tableName).toBe('main.events');
+    expect(dataGridState.latestProps?.pkColumns).toEqual(['id']);
+    expect(dataGridState.latestProps?.editLocator).toMatchObject({
+      strategy: 'primary-key',
+      columns: ['id'],
+      valueColumns: ['__gonavi_locator_1_id'],
+      hiddenColumns: ['__gonavi_locator_1_id'],
+      writableColumns: {
+        NAME: 'name',
+      },
+      readOnly: false,
+    });
+    expect(dataGridState.latestProps?.readOnly).toBe(false);
+    expect(String(backendApp.DBQueryMulti.mock.calls[0][2])).toContain('"id" AS "__gonavi_locator_1_id"');
+    expect(messageApi.warning).not.toHaveBeenCalled();
+  });
+
   it.each([
     'mysql',
     'mariadb',

frontend/src/components/TriggerViewer.object-edit.test.tsx

@@ -86,6 +86,7 @@ describe('TriggerViewer object edit entry', () => {
     storeState.addTab.mockReset();
     storeState.setActiveContext.mockReset();
     storeState.connections[0].config.type = 'postgres';
+    backendApp.DBQuery.mockReset();
     backendApp.DBQuery.mockResolvedValue({
       success: true,
       data: [{ trigger_definition: 'CREATE TRIGGER users_bi BEFORE INSERT ON audit.users EXECUTE FUNCTION audit.audit_users();' }],
@@ -170,4 +171,102 @@ describe('TriggerViewer object edit entry', () => {
     expect(query).toContain(':NEW.updated_at := SYSDATE;');
     expect(query).not.toContain('请补全 CREATE TRIGGER 语句');
   });
+
+  it('reloads the latest trigger definition before opening object edit', async () => {
+    backendApp.DBQuery
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ trigger_definition: 'CREATE TRIGGER users_bi BEFORE INSERT ON audit.users EXECUTE FUNCTION audit.audit_users();' }],
+      })
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ trigger_definition: 'CREATE TRIGGER users_bi BEFORE INSERT OR UPDATE ON audit.users EXECUTE FUNCTION audit.audit_users_v2();' }],
+      });
+
+    let renderer: any;
+    await act(async () => {
+      renderer = create(<TriggerViewer tab={tab} />);
+      await flushPromises();
+    });
+
+    const button = renderer.root.findAll((node: any) => node.type === 'button' && findButtonText(node).includes('对象修改'))[0];
+
+    await act(async () => {
+      await button.props.onClick();
+      await flushPromises();
+    });
+
+    expect(backendApp.DBQuery).toHaveBeenCalledTimes(2);
+    const query = storeState.addTab.mock.calls[0][0].query;
+    expect(query).toContain('CREATE TRIGGER users_bi BEFORE INSERT OR UPDATE ON audit.users');
+    expect(query).toContain('audit.audit_users_v2()');
+
+    const editor = renderer.root.findAll((node: any) => node.props['data-editor'] === 'true')[0];
+    expect(String(editor.children.join(''))).toContain('CREATE TRIGGER users_bi BEFORE INSERT OR UPDATE ON audit.users');
+  });
+
+  it('keeps the current trigger definition visible when refresh for object edit fails', async () => {
+    backendApp.DBQuery
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ trigger_definition: 'CREATE TRIGGER users_bi BEFORE INSERT ON audit.users EXECUTE FUNCTION audit.audit_users();' }],
+      })
+      .mockResolvedValueOnce({
+        success: false,
+        message: 'refresh failed',
+        data: [],
+      });
+
+    let renderer: any;
+    await act(async () => {
+      renderer = create(<TriggerViewer tab={tab} />);
+      await flushPromises();
+    });
+
+    const button = renderer.root.findAll((node: any) => node.type === 'button' && findButtonText(node).includes('对象修改'))[0];
+
+    await act(async () => {
+      await button.props.onClick();
+      await flushPromises();
+    });
+
+    expect(storeState.addTab).not.toHaveBeenCalled();
+    expect(String(renderer.root.findAll((node: any) => node.props['data-editor'] === 'true')[0].children.join(''))).toContain('CREATE TRIGGER users_bi BEFORE INSERT ON audit.users');
+    expect(findButtonText(renderer.root)).toContain('刷新最新定义失败');
+    expect(findButtonText(renderer.root)).toContain('refresh failed');
+  });
+
+  it('does not keep the previous trigger definition when switching objects and the new load fails', async () => {
+    backendApp.DBQuery
+      .mockResolvedValueOnce({
+        success: true,
+        data: [{ trigger_definition: 'CREATE TRIGGER users_bi BEFORE INSERT ON audit.users EXECUTE FUNCTION audit.audit_users();' }],
+      })
+      .mockResolvedValueOnce({
+        success: false,
+        message: 'load failed',
+        data: [],
+      });
+
+    let renderer: any;
+    await act(async () => {
+      renderer = create(<TriggerViewer tab={tab} />);
+      await flushPromises();
+    });
+
+    await act(async () => {
+      renderer.update(<TriggerViewer tab={{
+        ...tab,
+        id: 'trigger-conn-1-main-audit.users_bu',
+        title: '触发器: audit.users_bu',
+        triggerName: 'audit.users_bu',
+      }} />);
+      await flushPromises();
+    });
+
+    expect(findButtonText(renderer.root)).toContain('加载失败');
+    expect(findButtonText(renderer.root)).toContain('load failed');
+    expect(renderer.root.findAll((node: any) => node.props['data-editor'] === 'true')).toHaveLength(0);
+    expect(findButtonText(renderer.root)).not.toContain('CREATE TRIGGER users_bi BEFORE INSERT');
+  });
 });

frontend/src/components/TriggerViewer.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react';
+import React, { useState, useEffect, useRef } from 'react';
 import Editor from './MonacoEditor';
 import { Button, Spin, Alert } from 'antd';
 import { EditOutlined } from '@ant-design/icons';
@@ -42,12 +42,23 @@ const TriggerViewer: React.FC<TriggerViewerProps> = ({ tab }) => {
     const [loading, setLoading] = useState(true);
     const [error, setError] = useState<string | null>(null);
     const [triggerDefinition, setTriggerDefinition] = useState<string>('');
+    const [openingObjectEdit, setOpeningObjectEdit] = useState(false);
+    const isMountedRef = useRef(true);
+    const loadedDefinitionKeyRef = useRef('');
 
     const connections = useStore(state => state.connections);
     const theme = useStore(state => state.theme);
     const addTab = useStore(state => state.addTab);
     const setActiveContext = useStore(state => state.setActiveContext);
     const darkMode = theme === 'dark';
+    const objectIdentityKey = [
+        tab.connectionId,
+        tab.dbName,
+        tab.type,
+        tab.triggerName,
+        tab.triggerTableName,
+        tab.schemaName,
+    ].map((item) => String(item || '')).join('||');
 
     // 透明 Monaco Editor 主题由 MonacoEditor 包装组件按需注册（含 stickyScroll 不透明背景）
 
@@ -242,79 +253,98 @@ LIMIT 1`];
         }
     };
 
-    useEffect(() => {
-        const loadTriggerDefinition = async () => {
-            setLoading(true);
-            setError(null);
+    const loadTriggerDefinition = async (): Promise<{ success: boolean; definition?: string; error?: string }> => {
+        const conn = connections.find(c => c.id === tab.connectionId);
+        if (!conn) {
+            return { success: false, error: '未找到数据库连接' };
+        }
 
-            const conn = connections.find(c => c.id === tab.connectionId);
-            if (!conn) {
-                setError('未找到数据库连接');
-                setLoading(false);
-                return;
+        const triggerName = tab.triggerName || '';
+        const dbName = tab.dbName || '';
+
+        if (!triggerName) {
+            return { success: false, error: '触发器名称为空' };
+        }
+
+        const dialect = getMetadataDialect(conn);
+        const queries = buildShowTriggerQueries(dialect, triggerName, dbName);
+        const sphinxLike = isSphinxConnection(conn) && dialect === 'mysql';
+
+        if (!queries.length || String(queries[0] || '').startsWith('--')) {
+            return { success: true, definition: String(queries[0] || '-- 暂不支持该数据库类型的触发器定义查看') };
+        }
+
+        try {
+            const config = {
+                ...conn.config,
+                port: Number(conn.config.port),
+                password: conn.config.password || '',
+                database: conn.config.database || '',
+                useSSH: conn.config.useSSH || false,
+                ssh: conn.config.ssh || { host: '', port: 22, user: '', password: '', keyPath: '' }
+            };
+
+            const result = await runQueryCandidates(config, dbName, queries);
+
+            if (result.success && Array.isArray(result.data) && result.data.length > 0) {
+                return { success: true, definition: extractTriggerDefinition(dialect, result.data) };
             }
 
-            const triggerName = tab.triggerName || '';
-            const dbName = tab.dbName || '';
-
-            if (!triggerName) {
-                setError('触发器名称为空');
-                setLoading(false);
-                return;
-            }
-
-            const dialect = getMetadataDialect(conn);
-            const queries = buildShowTriggerQueries(dialect, triggerName, dbName);
-            const sphinxLike = isSphinxConnection(conn) && dialect === 'mysql';
-
-            if (!queries.length || String(queries[0] || '').startsWith('--')) {
-                setTriggerDefinition(String(queries[0] || '-- 暂不支持该数据库类型的触发器定义查看'));
-                setLoading(false);
-                return;
-            }
-
-            try {
-                const config = {
-                    ...conn.config,
-                    port: Number(conn.config.port),
-                    password: conn.config.password || '',
-                    database: conn.config.database || '',
-                    useSSH: conn.config.useSSH || false,
-                    ssh: conn.config.ssh || { host: '', port: 22, user: '', password: '', keyPath: '' }
-                };
-
-                const result = await runQueryCandidates(config, dbName, queries);
-
-                if (result.success && Array.isArray(result.data) && result.data.length > 0) {
-                    const definition = extractTriggerDefinition(dialect, result.data);
-                    setTriggerDefinition(definition);
-                    return;
-                }
-
-                if (result.success) {
-                    if (sphinxLike) {
-                        const version = await getVersionHint(config, dbName);
-                        const versionText = version ? `（版本: ${version}）` : '';
-                        setTriggerDefinition(`-- 当前 Sphinx 实例${versionText}未返回触发器定义。\n-- 已执行多套兼容查询，可能是版本能力限制或对象类型不支持。`);
-                        return;
-                    }
-                    setTriggerDefinition('-- 未找到触发器定义');
-                } else if (sphinxLike) {
+            if (result.success) {
+                if (sphinxLike) {
                     const version = await getVersionHint(config, dbName);
                     const versionText = version ? `（版本: ${version}）` : '';
-                    setTriggerDefinition(`-- 当前 Sphinx 实例${versionText}不支持触发器定义查询。\n-- 已自动尝试兼容语句，返回失败信息: ${result.message || 'unknown error'}`);
-                } else {
-                    setError(result.message || '查询触发器定义失败');
+                    return {
+                        success: true,
+                        definition: `-- 当前 Sphinx 实例${versionText}未返回触发器定义。\n-- 已执行多套兼容查询，可能是版本能力限制或对象类型不支持。`
+                    };
                 }
-            } catch (e: any) {
-                setError('查询触发器定义失败: ' + (e?.message || String(e)));
-            } finally {
-                setLoading(false);
+                return { success: true, definition: '-- 未找到触发器定义' };
             }
+
+            if (sphinxLike) {
+                const version = await getVersionHint(config, dbName);
+                const versionText = version ? `（版本: ${version}）` : '';
+                return {
+                    success: true,
+                    definition: `-- 当前 Sphinx 实例${versionText}不支持触发器定义查询。\n-- 已自动尝试兼容语句，返回失败信息: ${result.message || 'unknown error'}`
+                };
+            }
+
+            return { success: false, error: result.message || '查询触发器定义失败' };
+        } catch (e: any) {
+            return { success: false, error: '查询触发器定义失败: ' + (e?.message || String(e)) };
+        }
+    };
+
+    useEffect(() => {
+        let cancelled = false;
+        const syncTriggerDefinition = async () => {
+            setLoading(true);
+            setError(null);
+            const result = await loadTriggerDefinition();
+            if (cancelled) {
+                return;
+            }
+            if (result.success) {
+                loadedDefinitionKeyRef.current = objectIdentityKey;
+                setTriggerDefinition(String(result.definition || ''));
+            } else {
+                setError(result.error || '查询触发器定义失败');
+            }
+            setLoading(false);
         };
 
-        loadTriggerDefinition();
-    }, [tab.connectionId, tab.dbName, tab.triggerName, connections]);
+        syncTriggerDefinition();
+
+        return () => {
+            cancelled = true;
+        };
+    }, [tab.connectionId, tab.dbName, tab.triggerName, connections, objectIdentityKey]);
+
+    useEffect(() => () => {
+        isMountedRef.current = false;
+    }, []);
 
     if (loading) {
         return (
@@ -324,7 +354,10 @@ LIMIT 1`];
         );
     }
 
-    if (error) {
+    const displayedDefinition = loadedDefinitionKeyRef.current === objectIdentityKey ? triggerDefinition : '';
+    const hasDefinition = String(displayedDefinition || '').trim() !== '';
+
+    if (error && !hasDefinition) {
         return (
             <div style={{ padding: 16 }}>
                 <Alert type="error" message="加载失败" description={error} showIcon />
@@ -334,17 +367,36 @@ LIMIT 1`];
 
     const triggerName = String(tab.triggerName || '').trim();
     const dbName = String(tab.dbName || '').trim();
-    const openObjectEditQuery = () => {
-        if (!triggerName) return;
-        setActiveContext({ connectionId: tab.connectionId, dbName });
-        addTab({
-            id: `query-edit-trigger-${tab.connectionId}-${dbName}-${Date.now()}`,
-            title: `修改触发器: ${triggerName}`,
-            type: 'query',
-            connectionId: tab.connectionId,
-            dbName,
-            query: buildEditableTriggerSql(triggerName, triggerDefinition),
-        });
+    const openObjectEditQuery = async () => {
+        if (!triggerName || openingObjectEdit) return;
+        setOpeningObjectEdit(true);
+        setError(null);
+        try {
+            const result = await loadTriggerDefinition();
+            if (!isMountedRef.current) {
+                return;
+            }
+            if (!result.success) {
+                setError(result.error || '查询触发器定义失败');
+                return;
+            }
+            const latestDefinition = String(result.definition || '');
+            loadedDefinitionKeyRef.current = objectIdentityKey;
+            setTriggerDefinition(latestDefinition);
+            setActiveContext({ connectionId: tab.connectionId, dbName });
+            addTab({
+                id: `query-edit-trigger-${tab.connectionId}-${dbName}-${Date.now()}`,
+                title: `修改触发器: ${triggerName}`,
+                type: 'query',
+                connectionId: tab.connectionId,
+                dbName,
+                query: buildEditableTriggerSql(triggerName, latestDefinition),
+            });
+        } finally {
+            if (isMountedRef.current) {
+                setOpeningObjectEdit(false);
+            }
+        }
     };
 
     return (
@@ -354,16 +406,21 @@ LIMIT 1`];
                     <strong>触发器: </strong>{tab.triggerName}
                     {tab.dbName && <span style={{ marginLeft: 16, color: '#888' }}>数据库: {tab.dbName}</span>}
                 </div>
-                <Button size="small" icon={<EditOutlined />} onClick={openObjectEditQuery} disabled={!triggerName}>
+                <Button size="small" icon={<EditOutlined />} onClick={openObjectEditQuery} disabled={!triggerName} loading={openingObjectEdit}>
                     对象修改
                 </Button>
             </div>
+            {error && hasDefinition && (
+                <div style={{ padding: '8px 16px 0' }}>
+                    <Alert type="warning" message="刷新最新定义失败" description={error} showIcon />
+                </div>
+            )}
             <div style={{ flex: 1, minHeight: 0 }}>
                 <Editor
                     height="100%"
                     language="sql"
                     theme={darkMode ? 'transparent-dark' : 'transparent-light'}
-                    value={triggerDefinition}
+                    value={displayedDefinition}
                     options={{
                         readOnly: true,
                         minimap: { enabled: false },

frontend/src/utils/queryResultTable.test.ts

@@ -48,6 +48,15 @@ describe('extractQueryResultTableRef', () => {
       });
   });
 
+  it('keeps DuckDB schema-qualified table names for metadata lookups', () => {
+    expect(extractQueryResultTableRef('SELECT * FROM main.events LIMIT 500', 'duckdb', 'main'))
+      .toEqual({
+        tableName: 'main.events',
+        metadataDbName: 'main',
+        metadataTableName: 'main.events',
+      });
+  });
+
   it('does not mark join results as editable table refs', () => {
     expect(extractQueryResultTableRef('SELECT * FROM users u JOIN orders o ON u.id = o.user_id', 'oracle', 'APP'))
       .toBeUndefined();

frontend/src/utils/queryResultTable.ts

@@ -21,6 +21,11 @@ const isOracleLikeDialect = (dialect: string): boolean => {
   return normalized === 'oracle' || normalized === 'dameng' || normalized === 'dm' || normalized === 'dm8';
 };
 
+const keepsQualifiedTableNameForMetadata = (dialect: string): boolean => {
+  const normalized = String(dialect || '').trim().toLowerCase();
+  return normalized === 'duckdb';
+};
+
 const isQuotedIdentifier = (part: string): boolean => {
   const text = String(part || '').trim();
   if (!text) return false;
@@ -73,13 +78,16 @@ export const extractQueryResultTableRef = (
 
   const owner = parts.length >= 2 ? parts[parts.length - 2] : '';
   const metadataDbName = owner || normalizeCurrentDbName(currentDb, dialect);
-  const tableName = isOracleLikeDialect(dialect) && owner
+  const tableName = (isOracleLikeDialect(dialect) || keepsQualifiedTableNameForMetadata(dialect)) && owner
+    ? `${owner}.${metadataTableName}`
+    : metadataTableName;
+  const resolvedMetadataTableName = keepsQualifiedTableNameForMetadata(dialect) && owner
     ? `${owner}.${metadataTableName}`
     : metadataTableName;
 
   return {
     tableName,
     metadataDbName,
-    metadataTableName,
+    metadataTableName: resolvedMetadataTableName,
   };
 };