test(oceanbase): expect Oracle auto limit FETCH FIRST

frontend/src/components/MonacoEditor.tsx

@@ -24,14 +24,6 @@ const sameEditorPosition = (left: any, right: any): boolean => (
   && Number(left?.column) === Number(right?.column)
 );
 
-const isSelectionEmpty = (selection: any): boolean => (
-  !selection
-  || (
-    Number(selection.startLineNumber) === Number(selection.endLineNumber)
-    && Number(selection.startColumn) === Number(selection.endColumn)
-  )
-);
-
 const stripSqlIdentifierQuotes = (value: string): string => {
   const text = String(value || '').trim();
   if (!text) return '';
@@ -202,72 +194,6 @@ const patchQueryEditorAiInlineRightArrowFallback = (editor: any, monaco: any) =>
   };
 };
 
-const installPrintableInputFallback = (editor: any, monaco: any) => {
-  const editorDomNode = editor?.getDomNode?.();
-  if (!editorDomNode || editor.__gonaviPrintableInputFallbackInstalled) {
-    return;
-  }
-  const input = editorDomNode.querySelector?.('textarea.inputarea, .inputarea textarea, textarea') as HTMLTextAreaElement | null;
-  if (!(input instanceof HTMLTextAreaElement)) {
-    return;
-  }
-  Object.defineProperty(editor, '__gonaviPrintableInputFallbackInstalled', {
-    value: true,
-    configurable: true,
-  });
-
-  const isReadOnly = (): boolean => {
-    try {
-      const optionId = monaco?.editor?.EditorOption?.readOnly;
-      return optionId !== undefined ? editor.getOption?.(optionId) === true : false;
-    } catch {
-      return false;
-    }
-  };
-
-  const handleBeforeInput = (event: InputEvent) => {
-    const text = String(event.data || '');
-    if (
-      event.defaultPrevented
-      || event.isComposing
-      || event.inputType !== 'insertText'
-      || !text
-      || text.length > 8
-      || isReadOnly()
-    ) {
-      return;
-    }
-
-    const selectionBefore = editor.getSelection?.();
-    if (!isSelectionEmpty(selectionBefore)) {
-      return;
-    }
-    const beforeValue = String(editor.getValue?.() ?? '');
-    const beforePosition = editor.getPosition?.();
-
-    window.setTimeout(() => {
-      const domNode = editor.getDomNode?.();
-      if (!(domNode instanceof HTMLElement) || !domNode.isConnected || isReadOnly()) {
-        return;
-      }
-      if (document.activeElement && !domNode.contains(document.activeElement)) {
-        return;
-      }
-      const afterValue = String(editor.getValue?.() ?? '');
-      const afterPosition = editor.getPosition?.();
-      if (afterValue !== beforeValue || !sameEditorPosition(beforePosition, afterPosition)) {
-        return;
-      }
-      editor.trigger?.('gonavi-printable-input-fallback', 'type', { text });
-    }, 16);
-  };
-
-  input.addEventListener('beforeinput', handleBeforeInput);
-  editor.onDidDispose?.(() => {
-    input.removeEventListener('beforeinput', handleBeforeInput);
-  });
-};
-
 export const registerGonaviMonacoThemes: BeforeMount = (monaco) => {
   if (transparentThemesRegistered) {
     return;
@@ -365,7 +291,6 @@ const MonacoEditor: React.FC<MonacoEditorProps> = ({
   const handleMount: OnMount = useCallback((editor, monaco) => {
     installOceanBaseOracleNavigationFallback(editor);
     patchQueryEditorAiInlineRightArrowFallback(editor, monaco);
-    installPrintableInputFallback(editor, monaco);
     onMount?.(editor, monaco);
   }, [onMount]);
 

frontend/src/utils/queryAutoLimit.test.ts

@@ -40,9 +40,9 @@ describe('applyQueryAutoLimit', () => {
     ['dameng'],
     ['dm'],
     ['dm8'],
-  ])('adds ROWNUM limit for %s connections', (dbType) => {
+  ])('adds FETCH FIRST limit for %s connections', (dbType) => {
     expect(applyQueryAutoLimit('SELECT * FROM MYCIMLED.EDC_LOG', dbType, 500).sql)
-      .toBe('SELECT * FROM (SELECT * FROM MYCIMLED.EDC_LOG) WHERE ROWNUM <= 500');
+      .toBe('SELECT * FROM MYCIMLED.EDC_LOG FETCH FIRST 500 ROWS ONLY');
   });
 
   it.each([
@@ -61,8 +61,8 @@ describe('applyQueryAutoLimit', () => {
   });
 
   it.each([
-    ['oracle', 'SELECT * FROM (SELECT * FROM users) WHERE ROWNUM <= 500'],
-    ['dm8', 'SELECT * FROM (SELECT * FROM users) WHERE ROWNUM <= 500'],
+    ['oracle', 'SELECT * FROM users FETCH FIRST 500 ROWS ONLY'],
+    ['dm8', 'SELECT * FROM users FETCH FIRST 500 ROWS ONLY'],
     ['mssql', 'SELECT TOP 500 * FROM users'],
     ['postgresql', 'SELECT * FROM users LIMIT 500'],
     ['gauss-db', 'SELECT * FROM users LIMIT 500'],
@@ -76,12 +76,17 @@ describe('applyQueryAutoLimit', () => {
 
   it('keeps trailing semicolon and comments after injected Oracle limit', () => {
     expect(applyQueryAutoLimit('SELECT * FROM MYCIMLED.EDC_LOG; -- preview', 'oracle', 500).sql)
-      .toBe('SELECT * FROM (SELECT * FROM MYCIMLED.EDC_LOG) WHERE ROWNUM <= 500; -- preview');
+      .toBe('SELECT * FROM MYCIMLED.EDC_LOG FETCH FIRST 500 ROWS ONLY; -- preview');
   });
 
-  it('uses Oracle 11g compatible ROWNUM limit for simple table queries', () => {
+  it('uses Oracle FETCH FIRST limit for simple table queries', () => {
     expect(applyQueryAutoLimit('select 1 from xxx', 'oracle', 500).sql)
-      .toBe('SELECT * FROM (select 1 from xxx) WHERE ROWNUM <= 500');
+      .toBe('select 1 from xxx FETCH FIRST 500 ROWS ONLY');
+  });
+
+  it('keeps ORDER BY semantics with Oracle FETCH FIRST', () => {
+    expect(applyQueryAutoLimit('SELECT * FROM users ORDER BY created_at DESC', 'oracle', 100).sql)
+      .toBe('SELECT * FROM users ORDER BY created_at DESC FETCH FIRST 100 ROWS ONLY');
   });
 
   it('does not add another generic limit when SQL already limits rows', () => {

frontend/src/utils/queryAutoLimit.ts

@@ -322,7 +322,7 @@ export const applyQueryAutoLimit = (
     if (offsetPos >= 0 && (fromPos < 0 || offsetPos > fromPos)) return { sql, applied: false, maxRows };
     const forPos = findTopLevelKeyword(main, 'for');
     if (forPos >= 0 && (fromPos < 0 || forPos > fromPos)) return { sql, applied: false, maxRows };
-    return { sql: `SELECT * FROM (${main.trimEnd()}) WHERE ROWNUM <= ${maxRows}${tail}`, applied: true, maxRows };
+    return { sql: `${main.trimEnd()} FETCH FIRST ${maxRows} ROWS ONLY${tail}`, applied: true, maxRows };
   }
 
   const offsetPos = findTopLevelKeyword(main, 'offset');