fix(query): skip metadata for constant projections

Closes #7111

apps/desktop/src/stores/__tests__/queryStore.hiddenPrimaryKey.spec.ts

@@ -387,6 +387,42 @@ describe("queryStore hidden primary key editing", () => {
     expect(tab.tableMeta?.schema).toBe("reporting");
   });
 
+  it("executes a constant projection without waiting for Oracle table metadata", async () => {
+    getConnectionConfig.mockReturnValue({ id: "oracle-1", name: "Oracle", db_type: "oracle", database: "ORCL", query_timeout_secs: 30 });
+    getColumns.mockResolvedValue([{ name: "DUMMY", data_type: "VARCHAR2(1)", is_nullable: true, column_default: null, is_primary_key: false, extra: null }]);
+    listIndexes.mockResolvedValue([]);
+    listTables.mockReturnValue(new Promise(() => undefined));
+    analyzeEditableQueryEditability.mockResolvedValue({
+      editable: true,
+      analysis: {
+        schema: undefined,
+        tableName: "DUAL",
+        selectStar: false,
+        columns: [{ resultName: "1", expression: "1" }],
+      },
+    });
+    const result = [{ columns: ["1"], rows: [[1]], affected_rows: 0, execution_time_ms: 1 }];
+    const executionGate = deferred<typeof result>();
+    executeMulti.mockReturnValue(executionGate.promise);
+
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+    const tabId = store.createTab("oracle-1", "ORCL", "Query");
+    store.setAutoCommit(tabId, true);
+    const sql = "SELECT 1 FROM DUAL";
+
+    const execution = store.executeTabSql(tabId, sql);
+    await vi.waitFor(() => expect(executeMulti).toHaveBeenCalled(), { timeout: 250 });
+
+    expect(executeMulti).toHaveBeenCalledWith("oracle-1", "ORCL", sql, undefined, expect.any(String), expect.objectContaining({ timeoutSecs: 30 }));
+    expect(getColumns).not.toHaveBeenCalled();
+    expect(listIndexes).not.toHaveBeenCalled();
+    expect(listTables).not.toHaveBeenCalled();
+
+    executionGate.resolve(result);
+    await execution;
+  });
+
   it("uses a hidden Oracle ROWID to keep keyless base-table query results editable", async () => {
     getConnectionConfig.mockReturnValue({ id: "oracle-1", name: "Oracle", db_type: "oracle", database: "ORCL", query_timeout_secs: 30 });
     getColumns.mockResolvedValue([

apps/desktop/src/stores/queryStore.ts

@@ -3958,11 +3958,15 @@ export const useQueryStore = defineStore("query", () => {
       const analysis = editability.analysis;
       const sources = editableQuerySources(analysis);
       if (sources.length !== 1 || analysis.distinct) return unchanged;
+      const source = sources[0]!;
+      const wholeSourceProjected = projectsAllColumnsForSource(analysis, source.key);
+      const hasDirectSourceProjection = analysis.columns.some((column) => Boolean(column.sourceName) && (!column.sourceKey || column.sourceKey === source.key));
+      if (!wholeSourceProjected && !hasDirectSourceProjection) return unchanged;
       // Whole-source projections already include declared primary keys. Only
       // Oracle needs preflight metadata here to add ROWID for a keyless table.
-      if (databaseType !== "oracle" && projectsAllColumnsForSource(analysis, sources[0]!.key)) return unchanged;
+      if (databaseType !== "oracle" && wholeSourceProjected) return unchanged;
 
-      const target = resolveEditableSourceMetadataTarget(tab, analysis, sources[0]!, conn, databaseType, executionDatabase);
+      const target = resolveEditableSourceMetadataTarget(tab, analysis, source, conn, databaseType, executionDatabase);
       const cached = getCachedTableMetadata(target.request);
       let loaded = cached ? loadedEditableSourceFromMetadata(target, cached.metadata) : undefined;
       if (!cached && databaseType === "oracle") {
@@ -3981,7 +3985,7 @@ export const useQueryStore = defineStore("query", () => {
         loaded = loadedEditableSourceFromMetadata(target, (await fullMetadataPromise).metadata);
       }
 
-      loaded ??= await loadEditableQuerySource(tab, analysis, sources[0]!, conn, databaseType, executionDatabase, traceId, elapsed);
+      loaded ??= await loadEditableQuerySource(tab, analysis, source, conn, databaseType, executionDatabase, traceId, elapsed);
       if (loaded.tableMeta.columns.length === 0) return unchanged;
       if (loaded.tableMeta.tableType?.toUpperCase().includes("VIEW")) return unchanged;
       const columnPrimaryKeys = loaded.tableMeta.columns.filter((column) => column.is_primary_key).map((column) => column.name);