diff --git a/apps/desktop/src/App.vue b/apps/desktop/src/App.vue
index 3ab5aab13a..35910ed76d 100644
--- a/apps/desktop/src/App.vue
+++ b/apps/desktop/src/App.vue
@@ -2618,7 +2618,7 @@ function onEditTableStructure(table: SqlObjectNavigationTarget) {
   queryStore.openTableStructure(target.connectionId, target.database, target.schema, target.tableName, undefined, undefined, target.catalog);
 }
 
-async function onOpenObjectSource(table: SqlObjectNavigationTarget, initialEditing: boolean) {
+function onOpenObjectSource(table: SqlObjectNavigationTarget, initialEditing: boolean) {
   const provisionalTarget = tableTargetFromActiveTab(table);
   if (!provisionalTarget) return;
   const databaseType = effectiveDatabaseTypeForConnection(connectionStore.getConfig(provisionalTarget.connectionId));
@@ -2630,42 +2630,22 @@ async function onOpenObjectSource(table: SqlObjectNavigationTarget, initialEditi
   const sourceName = sqlObjectNavigationSourceName(navigation);
   const sourceSchema = sqlObjectNavigationSourceSchema(navigation, target.schema || target.database);
   try {
-    await connectionStore.ensureConnected(target.connectionId);
-    connectionStore.activeConnectionId = target.connectionId;
-    // Align Ctrl/Cmd+click with sidebar "view source" (dialog vs data tab).
+    // Keep the editor navigation path aligned with the sidebar: create a visible
+    // pending tab first, then let the store own connection/source loading.
     if (settingsStore.editorSettings.routineSourceOpenMode === "query-tab") {
-      try {
-        const resolvedDatabaseType = effectiveDatabaseTypeForConnection(connectionStore.getConfig(target.connectionId));
-        if (!resolvedDatabaseType) throw new Error("Connection type is unavailable.");
-        // Wrap Oracle bare ALL_SOURCE (`procedure name is ...`) as CREATE OR REPLACE for the editor.
-        const {
-          raw,
-          editableSource,
-          objectType: resolvedType,
-        } = await loadEditableObjectSourceForEditor(api.getObjectSource, buildEditableObjectSource, {
-          connectionId: target.connectionId,
-          database: target.database,
-          schema: sourceSchema || target.database,
-          name: sourceName,
-          objectType,
-          databaseType: resolvedDatabaseType,
-          signature: navigation.signature,
-        });
-        const tabId = queryStore.createTab(target.connectionId, target.database, `Source - ${sourceName}`, "query", sourceSchema, editableSource, target.catalog, { forceNew: true, sourceView: true });
-        const sourceIsEditable = raw.editable !== false && !["SEQUENCE", "TRIGGER", "TYPE", "TYPE_BODY"].includes(resolvedType);
-        if (sourceIsEditable) {
-          queryStore.setObjectSource(tabId, {
-            schema: sourceSchema || target.database,
-            name: sourceName,
-            objectType: resolvedType,
-            signature: navigation.signature,
-          });
-        }
-      } catch (e: any) {
-        toast(e?.message || String(e), 5000);
-      }
+      queryStore.openObjectSourceTabPending({
+        connectionId: target.connectionId,
+        database: target.database,
+        title: `Source - ${sourceName}`,
+        schema: sourceSchema || target.database,
+        catalog: target.catalog,
+        request: { name: sourceName, objectType, signature: navigation.signature },
+      });
       return;
     }
+
+    // The dialog owns ensureConnected so its existing loading/error/retry UI is
+    // mounted before a slow connection health check or Oracle metadata query.
     queryEditorObjectSourceTarget.value = {
       connectionId: target.connectionId,
       database: target.database,
diff --git a/apps/desktop/src/components/layout/ContentArea.vue b/apps/desktop/src/components/layout/ContentArea.vue
index 58332f78cd..5dbef2f9b9 100644
--- a/apps/desktop/src/components/layout/ContentArea.vue
+++ b/apps/desktop/src/components/layout/ContentArea.vue
@@ -672,6 +672,7 @@ const resultsPaneSize = ref(Number(safeLocalStorageGet("dbx-results-pane-size"))
 // re-normalize a single pane, and shrinking it would leave a blank dead zone.
 const editorPaneSize = computed(() => (props.editorOnly || !resultsPaneOpen.value ? 100 : 100 - resultsPaneSize.value));
 const queryRunningElapsed = ref(0);
+const sourceLoadElapsed = ref(0);
 
 function toggleResultsPane(): boolean {
   if (props.activeTab.mode !== "query" || !hasQueryOutput.value) return false;
@@ -703,25 +704,36 @@ function onResultsResized(payload: { panes: { size: number }[] }) {
 }
 let queryRunningElapsedFrame: number | undefined;
 
-function stopQueryRunningElapsedTimer() {
+function stopRunningElapsedTimer() {
   if (queryRunningElapsedFrame !== undefined) {
     window.cancelAnimationFrame(queryRunningElapsedFrame);
     queryRunningElapsedFrame = undefined;
   }
 }
 
-function updateQueryRunningElapsed() {
-  const startedAt = props.activeTab.queryExecutionStartedAt;
-  queryRunningElapsed.value = props.activeTab.isExecuting && startedAt ? Math.max(0, Date.now() - startedAt) : 0;
+/** 源码仍在加载（未失败）时的开始时间；用于耗时显示与 rAF 循环的续期判断。 */
+function pendingSourceLoadStartedAt(): number | undefined {
+  const load = props.activeTab.sourceLoad;
+  return load && !load.error ? load.startedAt : undefined;
 }
 
-function startQueryRunningElapsedTimer() {
-  stopQueryRunningElapsedTimer();
-  updateQueryRunningElapsed();
-  if (!props.activeTab.isExecuting || !props.activeTab.queryExecutionStartedAt) return;
+// 一个 rAF 循环同时驱动「查询执行中」与「对象源码加载中」两个耗时显示：
+// issue #9035 的核心体感就是「不知道要等多久」，所以源码加载也要显示已耗时。
+function updateRunningElapsed() {
+  const startedAt = props.activeTab.queryExecutionStartedAt;
+  queryRunningElapsed.value = props.activeTab.isExecuting && startedAt ? Math.max(0, Date.now() - startedAt) : 0;
+  const sourceStartedAt = pendingSourceLoadStartedAt();
+  sourceLoadElapsed.value = sourceStartedAt ? Math.max(0, Date.now() - sourceStartedAt) : 0;
+}
+
+function startRunningElapsedTimer() {
+  stopRunningElapsedTimer();
+  updateRunningElapsed();
+  const isTicking = () => (props.activeTab.isExecuting && !!props.activeTab.queryExecutionStartedAt) || pendingSourceLoadStartedAt() !== undefined;
+  if (!isTicking()) return;
   const updateOnNextFrame = () => {
-    updateQueryRunningElapsed();
-    if (props.activeTab.isExecuting && props.activeTab.queryExecutionStartedAt) {
+    updateRunningElapsed();
+    if (isTicking()) {
       queryRunningElapsedFrame = window.requestAnimationFrame(updateOnNextFrame);
     }
   };
@@ -729,11 +741,12 @@ function startQueryRunningElapsedTimer() {
 }
 
 const queryRunningElapsedSeconds = computed(() => formatElapsedSeconds(queryRunningElapsed.value));
+const sourceLoadElapsedSeconds = computed(() => formatElapsedSeconds(sourceLoadElapsed.value));
 
-watch(() => [props.activeTab.id, props.activeTab.isExecuting, props.activeTab.queryExecutionStartedAt] as const, startQueryRunningElapsedTimer, { immediate: true });
+watch(() => [props.activeTab.id, props.activeTab.isExecuting, props.activeTab.queryExecutionStartedAt, props.activeTab.sourceLoad?.startedAt, props.activeTab.sourceLoad?.error] as const, startRunningElapsedTimer, { immediate: true });
 
 onUnmounted(() => {
-  stopQueryRunningElapsedTimer();
+  stopRunningElapsedTimer();
   standaloneResultToolbarResizeObserver?.disconnect();
   window.removeEventListener("dbx-refresh-active-kv-browser", onRefreshActiveKvBrowser);
   window.removeEventListener("resize", updateStandaloneResultToolbarDimensions);
@@ -1320,7 +1333,18 @@ defineExpose({
             <div v-if="activeProductionContext.active" class="production-watermark pointer-events-none absolute inset-0 z-10 grid select-none" aria-hidden="true">
               <span v-for="index in 4" :key="index" class="production-watermark__label whitespace-nowrap font-mono text-6xl font-extrabold text-red-700/[0.12] dark:text-red-200/[0.1]">{{ productionWatermarkText }}</span>
             </div>
+            <!-- issue #9035：源码 tab 先出现再加载。pending 期间不挂载编辑器
+                 （还没有内容可编辑，也省下一次 Monaco 初始化），失败则就地重试。 -->
+            <QueryLoadingState v-if="activeTab.sourceLoad && !activeTab.sourceLoad.error" class="relative z-0 flex-1" :elapsed-seconds="sourceLoadElapsedSeconds" />
+            <div v-else-if="activeTab.sourceLoad?.error" class="relative z-0 flex flex-1 min-h-0 flex-col items-center justify-center gap-3 px-6 text-sm" data-object-source-load-error>
+              <p class="max-w-[80%] text-center break-words text-destructive">{{ activeTab.sourceLoad.error }}</p>
+              <Button variant="outline" size="sm" class="gap-1.5" @click="queryStore.retryObjectSourceTab(activeTab.id)">
+                <RotateCcw class="h-4 w-4" />
+                {{ t("common.retry") }}
+              </Button>
+            </div>
             <QueryEditor
+              v-else
               ref="queryEditorRef"
               class="relative z-0 flex-1"
               :auto-focus="autoFocus !== false"
diff --git a/apps/desktop/src/components/layout/TabExecutionStatus.vue b/apps/desktop/src/components/layout/TabExecutionStatus.vue
index 93c4be3702..c3e1c4cc17 100644
--- a/apps/desktop/src/components/layout/TabExecutionStatus.vue
+++ b/apps/desktop/src/components/layout/TabExecutionStatus.vue
@@ -6,26 +6,24 @@ import { queryExecutionLabelKey } from "@/lib/sql/queryExecutionState";
 import type { QueryTab } from "@/types/database";
 
 const props = defineProps<{
-  tab: Pick<QueryTab, "mode" | "isExecuting" | "isCancelling">;
+  tab: Pick<QueryTab, "mode" | "isExecuting" | "isCancelling" | "sourceLoad">;
 }>();
 
 const { t } = useI18n();
-const status = computed(() => {
-  if (props.tab.mode !== "query" || !props.tab.isExecuting) return undefined;
+// 源码加载中（issue #9035）与查询执行中共用这一个 tab 栏转圈：两者都是
+// 「这个 tab 正在等后端」，用户需要的反馈是同一种。
+const status = computed<"running" | "cancelling" | "source-loading" | undefined>(() => {
+  if (props.tab.mode !== "query") return undefined;
+  if (props.tab.sourceLoad && !props.tab.sourceLoad.error) return "source-loading";
+  if (!props.tab.isExecuting) return undefined;
   return props.tab.isCancelling ? "cancelling" : "running";
 });
+
+const labelKey = computed(() => (status.value === "source-loading" ? "common.loading" : queryExecutionLabelKey(props.tab)));
 </script>
 
 <template>
-  <span
-    v-if="status"
-    data-tab-execution-status
-    role="status"
-    class="inline-flex h-3.5 w-3.5 shrink-0 items-center justify-center"
-    :class="status === 'cancelling' ? 'text-amber-600 dark:text-amber-400' : 'text-blue-600 dark:text-blue-400'"
-    :aria-label="t(queryExecutionLabelKey(tab))"
-    :title="t(queryExecutionLabelKey(tab))"
-  >
+  <span v-if="status" data-tab-execution-status role="status" class="inline-flex h-3.5 w-3.5 shrink-0 items-center justify-center" :class="status === 'cancelling' ? 'text-amber-600 dark:text-amber-400' : 'text-blue-600 dark:text-blue-400'" :aria-label="t(labelKey)" :title="t(labelKey)">
     <Loader2 aria-hidden="true" class="h-3.5 w-3.5 animate-spin motion-reduce:animate-none" />
   </span>
   <slot v-else />
diff --git a/apps/desktop/src/components/layout/__tests__/TabExecutionStatus.spec.ts b/apps/desktop/src/components/layout/__tests__/TabExecutionStatus.spec.ts
index 8873cd5c31..c3bc2e66d9 100644
--- a/apps/desktop/src/components/layout/__tests__/TabExecutionStatus.spec.ts
+++ b/apps/desktop/src/components/layout/__tests__/TabExecutionStatus.spec.ts
@@ -10,7 +10,7 @@ vi.mock("vue-i18n", () => ({
 
 const mountedApps: ReturnType<typeof createApp>[] = [];
 
-function mountStatus(initial: { mode: "query" | "data"; isExecuting: boolean; isCancelling?: boolean }, withFallback = false) {
+function mountStatus(initial: { mode: "query" | "data"; isExecuting: boolean; isCancelling?: boolean; sourceLoad?: { startedAt: number; error?: string; request: { name: string; objectType: string } } }, withFallback = false) {
   const state = reactive(initial);
   const root = document.createElement("div");
   document.body.appendChild(root);
@@ -82,4 +82,31 @@ describe("TabExecutionStatus", () => {
     expect(idle.root.querySelector("[data-tab-execution-status]")).toBeNull();
     expect(data.root.querySelector("[data-tab-execution-status]")).toBeNull();
   });
+
+  // issue #9035：源码 tab 先出现再加载，加载中的等待必须有反馈。
+  it("shows the loading indicator while an object source tab is still loading", async () => {
+    const { root, state } = mountStatus({ mode: "query", isExecuting: false, sourceLoad: { startedAt: Date.now(), request: { name: "v_orders", objectType: "VIEW" } } }, true);
+    await nextTick();
+
+    const status = root.querySelector<HTMLElement>("[data-tab-execution-status]");
+    expect(status).not.toBeNull();
+    expect(status?.getAttribute("aria-label")).toBe("common.loading");
+    expect(status?.className).toContain("text-blue-600");
+    // 加载态占用图标位，与查询执行中的表现一致
+    expect(root.querySelector("[data-tab-icon]")).toBeNull();
+
+    state.sourceLoad = undefined;
+    await nextTick();
+    expect(root.querySelector("[data-tab-execution-status]")).toBeNull();
+    expect(root.querySelector("[data-tab-icon]")).not.toBeNull();
+  });
+
+  it("stops the loading indicator once the object source load failed", async () => {
+    const { root } = mountStatus({ mode: "query", isExecuting: false, sourceLoad: { startedAt: Date.now(), error: "ORA-00942", request: { name: "v_orders", objectType: "VIEW" } } }, true);
+    await nextTick();
+
+    // 失败态由 tab 内容区的错误 + Retry 表达，tab 栏不应继续转圈
+    expect(root.querySelector("[data-tab-execution-status]")).toBeNull();
+    expect(root.querySelector("[data-tab-icon]")).not.toBeNull();
+  });
 });
diff --git a/apps/desktop/src/components/objects/ObjectSourceDialog.vue b/apps/desktop/src/components/objects/ObjectSourceDialog.vue
index b0964dfd3b..c6efe64c4c 100644
--- a/apps/desktop/src/components/objects/ObjectSourceDialog.vue
+++ b/apps/desktop/src/components/objects/ObjectSourceDialog.vue
@@ -87,6 +87,10 @@ async function loadSource(nextEditing = props.initialEditing && canEdit.value) {
   loading.value = true;
   try {
     if (!props.databaseType) throw new Error("Connection type is unavailable.");
+    // issue #9035：连接建立也纳入弹窗的加载态。调用方不再先 await ensureConnected
+    // 才打开弹窗，否则弹窗挂载前会有一段没有任何反馈的等待。
+    await connectionStore.ensureConnected(props.connectionId);
+    connectionStore.activeConnectionId = props.connectionId;
     const schema = props.schema || props.database;
     const { source: result, objectType: resolvedType } = await loadObjectSourceWithRoutineFallback(api.getObjectSource, props.connectionId, props.database, schema, props.name, props.objectType, props.signature, props.relationName);
     const editableAllowed = result.editable !== false;
diff --git a/apps/desktop/src/components/sidebar/ConnectionTree.vue b/apps/desktop/src/components/sidebar/ConnectionTree.vue
index 09196dfaad..d46aad4902 100644
--- a/apps/desktop/src/components/sidebar/ConnectionTree.vue
+++ b/apps/desktop/src/components/sidebar/ConnectionTree.vue
@@ -2067,18 +2067,11 @@ function openSidebarObjectSource(node: TreeNode, initialEditing: boolean) {
   // connections list user-defined types without a CREATE TYPE getter this cycle.
   if ((node.type === "type" || node.type === "type-body") && !supportsTypeObjectSource(store.getConfig(node.connectionId)?.db_type)) return;
   const target = createSidebarActionTarget(node);
-  const requestGeneration = beginSidebarAction();
-  void store
-    .ensureConnected(target.connectionId!)
-    .then(() => {
-      if (requestGeneration !== sidebarActionGeneration) return;
-      store.activeConnectionId = target.connectionId!;
-      sidebarObjectSourceTarget.value = { node: target, initialEditing };
-      sidebarObjectSourceOpen.value = true;
-    })
-    .catch((error: any) => {
-      if (requestGeneration === sidebarActionGeneration) toast(error?.message || String(error), 5000);
-    });
+  beginSidebarAction();
+  // issue #9035：弹窗立即挂载。此前先 await ensureConnected 再开弹窗，这段时间
+  // 界面上没有任何反馈；现在连接与取源都在弹窗自身的加载态之内完成。
+  sidebarObjectSourceTarget.value = { node: target, initialEditing };
+  sidebarObjectSourceOpen.value = true;
 }
 
 function openSidebarSettings(initialTab: string) {
diff --git a/apps/desktop/src/components/sidebar/SidebarTreeRuntimeHost.vue b/apps/desktop/src/components/sidebar/SidebarTreeRuntimeHost.vue
index 0aa87ec9f4..cb9583e77d 100644
--- a/apps/desktop/src/components/sidebar/SidebarTreeRuntimeHost.vue
+++ b/apps/desktop/src/components/sidebar/SidebarTreeRuntimeHost.vue
@@ -156,8 +156,7 @@ import {
   type TableChildObjectType,
 } from "@/lib/database/dbAdminSql";
 import { buildRenameObjectSql, buildRenameDatabaseSql, buildRenameDatabasePreflightSql, databaseRenameMaintenanceDatabase, supportsDatabaseRename, supportsObjectRename, type RenameableObjectType } from "@/lib/table/objectRenameSql";
-import { buildEditableObjectSource, buildRoutineRenameObjectSourceStatements, supportsSourceBackedRoutineRename } from "@/lib/table/objectSourceEditor";
-import { loadEditableObjectSourceForEditor } from "@/lib/table/objectSourceLoad";
+import { buildRoutineRenameObjectSourceStatements, supportsSourceBackedRoutineRename } from "@/lib/table/objectSourceEditor";
 import { buildViewDdl } from "@/lib/table/viewDdl";
 import { formatSqlForDisplay, sqlFormatDialectForDbType } from "@/lib/sql/sqlFormatter";
 import { omitDdlIdentifierQuotes } from "@/lib/sql/ddlDisplay";
@@ -352,7 +351,7 @@ const settingsStore = useSettingsStore();
 
 const savedSqlStore = useSavedSqlStore();
 
-const { toast, message: toastMessage, dismissToast } = useToast();
+const { toast } = useToast();
 const installedPlugins = ref<InstalledPlugin[]>([]);
 const sidebarPluginRegistry = computed(() => createFrontendPluginRegistry(installedPlugins.value, appLocale.value));
 
@@ -2526,70 +2525,22 @@ function openObjectSourceDialog(initialEditing: boolean, viewPackageBody = false
   const database = node.database;
   const sourceTarget = objectSourceTargetForTreeNode(sourceNode);
   if (!sourceTarget) return;
-  const openMode = settingsStore.editorSettings.routineSourceOpenMode;
-  if (openMode === "query-tab") {
-    const loadingMessage = t("common.loading");
-    const loadingToastTimer = window.setTimeout(() => toast(loadingMessage, 30000), 350);
-    const finishLoadingToast = () => {
-      window.clearTimeout(loadingToastTimer);
-      if (toastMessage.value === loadingMessage) dismissToast();
-    };
-    void connectionStore
-      .ensureConnected(connectionId)
-      .then(async () => {
-        connectionStore.activeConnectionId = connectionId;
-        const schema = sourceTarget.schema || database;
-        const databaseType = effectiveDatabaseTypeForConnection(connectionStore.getConfig(connectionId));
-        if (!databaseType) throw new Error("Connection type is unavailable.");
-        const objectName = sourceTarget.name;
-        const {
-          raw,
-          editableSource,
-          objectType: resolvedType,
-        } = await loadEditableObjectSourceForEditor(api.getObjectSource, buildEditableObjectSource, {
-          connectionId,
-          database,
-          schema,
-          name: objectName,
-          objectType: sourceTarget.objectType as any,
-          databaseType,
-          signature: sourceNode.signature,
-        });
-        const sourceIsEditable = raw.editable !== false && !["SEQUENCE", "TRIGGER", "TYPE", "TYPE_BODY", "JOB"].includes(resolvedType);
-        if (sourceIsEditable) {
-          queryStore.openObjectSourceTab({
-            connectionId,
-            database,
-            title: `Source - ${node.label}`,
-            schema,
-            catalog: node.catalog,
-            sql: editableSource,
-            objectSource: {
-              schema,
-              name: objectName,
-              objectType: resolvedType,
-              signature: node.signature,
-            },
-          });
-        } else {
-          queryStore.createTab(connectionId, database, `Source - ${node.label}`, "query", schema, editableSource, node.catalog, { forceNew: true, sourceView: true });
-        }
-      })
-      .catch((e: any) => {
-        toast(e?.message || String(e), 5000);
-      })
-      .finally(finishLoadingToast);
+  const schema = sourceTarget.schema || database;
+  // issue #9035：两个分支都不再 await 连接与取源。先把容器挂出来（源码 tab /
+  // 源码弹窗），ensureConnected 与 getObjectSource 都发生在已挂载的 UI 之内，
+  // 加载中有状态、失败就地重试，而不是点击后一段时间毫无反应。
+  if (settingsStore.editorSettings.routineSourceOpenMode === "query-tab") {
+    queryStore.openObjectSourceTabPending({
+      connectionId,
+      database,
+      title: `Source - ${node.label}`,
+      schema,
+      catalog: node.catalog,
+      request: { name: sourceTarget.name, objectType: sourceTarget.objectType, signature: sourceNode.signature },
+    });
     return;
   }
-  void connectionStore
-    .ensureConnected(connectionId)
-    .then(() => {
-      connectionStore.activeConnectionId = connectionId;
-      emit("open-object-source", sourceNode, initialEditing);
-    })
-    .catch((e: any) => {
-      toast(e?.message || String(e), 5000);
-    });
+  emit("open-object-source", sourceNode, initialEditing);
 }
 
 function openProcedureExecution() {
diff --git a/apps/desktop/src/lib/__tests__/app/openTabsPersistence.spec.ts b/apps/desktop/src/lib/__tests__/app/openTabsPersistence.spec.ts
index d25a55cc8a..daa8cfabb4 100644
--- a/apps/desktop/src/lib/__tests__/app/openTabsPersistence.spec.ts
+++ b/apps/desktop/src/lib/__tests__/app/openTabsPersistence.spec.ts
@@ -62,6 +62,20 @@ describe("openTabsPersistence originalSql round-trip", () => {
     expect(restored.objectSource).toBeUndefined();
   });
 
+  it("does not persist a pending object-source tab without its in-flight request", () => {
+    const pending = queryTab({
+      id: "pending-source",
+      title: "Source - v_orders",
+      sourceView: true,
+      sourceLoad: {
+        startedAt: Date.now(),
+        request: { name: "v_orders", objectType: "VIEW" },
+      },
+    });
+
+    expect(serializeOpenTabs([pending])).toEqual([]);
+  });
+
   it("keeps legacy query tabs without source intent compatible", () => {
     const [restored] = roundTrip([queryTab({ sql: "SELECT 1" })]);
     expect(restored.sourceView).toBeUndefined();
diff --git a/apps/desktop/src/lib/app/openTabsPersistence.ts b/apps/desktop/src/lib/app/openTabsPersistence.ts
index eb0585908b..29352c37df 100644
--- a/apps/desktop/src/lib/app/openTabsPersistence.ts
+++ b/apps/desktop/src/lib/app/openTabsPersistence.ts
@@ -104,6 +104,13 @@ function shouldPersistTabSql(tab: QueryTab) {
   return tab.originalSql !== undefined && tab.sql !== tab.originalSql;
 }
 
+// Pending object-source tabs are transient work surfaces. Persisting one while
+// its request is in flight would restore an empty source tab after restart,
+// because the request itself is intentionally not durable.
+function shouldPersistOpenTab(tab: QueryTab): boolean {
+  return !tab.sourceLoad;
+}
+
 function restoredOriginalSql(tab: SavedOpenTab, mode: QueryTab["mode"], sql: string) {
   if (mode !== "query") return undefined;
   if (tab.externalSqlPath) return tab.originalSql ?? sql;
@@ -149,7 +156,7 @@ function restoredTabUiState(tab: SavedOpenTab): QueryTab["uiState"] {
 }
 
 export function serializeOpenTabs(tabs: QueryTab[]): SavedOpenTab[] {
-  return tabs.map((tab) => ({
+  return tabs.filter(shouldPersistOpenTab).map((tab) => ({
     id: tab.id,
     ...(typeof tab.createdAt === "number" ? { createdAt: tab.createdAt } : {}),
     title: tab.title,
@@ -259,6 +266,9 @@ function restoreOpenTabsArray(parsed: unknown, rawActiveTabId: string | null, op
         redisMonitorActive: false,
         isCancelling: false,
         queryExecutionStartedAt: undefined,
+        // sourceLoad 是纯运行期态（serializeOpenTabs 不落盘）。这里显式清空，
+        // 让「恢复后的 tab 不会停在加载中」成为不变量，而不是依赖白名单的副作用。
+        sourceLoad: undefined,
         executingResultRunId: undefined,
         editorViewport: restoredEditorViewport(tab),
         editorSelection: restoredEditorSelection(tab, typeof tab.sql === "string" ? tab.sql.length : 0),
diff --git a/apps/desktop/src/stores/__tests__/queryStore.objectSourcePending.spec.ts b/apps/desktop/src/stores/__tests__/queryStore.objectSourcePending.spec.ts
new file mode 100644
index 0000000000..bb23508c7d
--- /dev/null
+++ b/apps/desktop/src/stores/__tests__/queryStore.objectSourcePending.spec.ts
@@ -0,0 +1,272 @@
+import { createPinia, setActivePinia } from "pinia";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+// issue #9035：源码 tab 必须先出现再加载。这批用例锁定 pending 占位 tab 的
+// 行为契约：立即出现、原地填充、就地重试、加载中被关闭则丢弃、重复点击去重。
+const mocks = vi.hoisted(() => {
+  const connectionStore = {
+    activeConnectionId: null as string | null,
+    ensureConnected: vi.fn(async () => {}),
+    getConfig: (connectionId: string) => (connectionId ? { id: connectionId, name: connectionId, db_type: "oracle" } : undefined),
+  };
+  return {
+    connectionStore,
+    ensureConnected: connectionStore.ensureConnected,
+    getObjectSource: vi.fn(),
+    buildEditableObjectSource: vi.fn(async (input: { source: string }) => input.source),
+    closeQuerySession: vi.fn(async () => {}),
+    closeClientConnectionSession: vi.fn(async () => {}),
+    saveOpenTabsState: vi.fn(async () => {}),
+  };
+});
+
+vi.mock("@/lib/backend/api", () => ({
+  getObjectSource: (...args: unknown[]) => mocks.getObjectSource(...args),
+  buildEditableObjectSource: (input: { source: string }) => mocks.buildEditableObjectSource(input),
+  closeQuerySession: mocks.closeQuerySession,
+  closeClientConnectionSession: mocks.closeClientConnectionSession,
+  saveOpenTabsState: mocks.saveOpenTabsState,
+}));
+
+vi.mock("@/stores/connectionStore", () => ({
+  useConnectionStore: () => mocks.connectionStore,
+}));
+
+const CONNECTION_ID = "ora-1";
+const DATABASE = "ORCL";
+const SCHEMA = "APP";
+
+const pendingOptions = (request: { name: string; objectType: "VIEW" | "PROCEDURE" | "FUNCTION"; signature?: string }) => ({
+  connectionId: CONNECTION_ID,
+  database: DATABASE,
+  title: `Source - ${request.name}`,
+  schema: SCHEMA,
+  request,
+});
+
+const objectSource = (source: string, editable?: boolean) => ({
+  name: "ignored",
+  object_type: "VIEW" as const,
+  source,
+  ...(editable === undefined ? {} : { editable }),
+});
+
+/** 让 loader 的 await 链跑完（ensureConnected → getObjectSource → 落地）。 */
+const settle = () => new Promise((resolve) => setTimeout(resolve, 0));
+
+describe("queryStore pending object source tab", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.stubGlobal("localStorage", { getItem: vi.fn(() => null), setItem: vi.fn(), removeItem: vi.fn() });
+    setActivePinia(createPinia());
+  });
+
+  it("creates a visible loading tab before the source arrives", async () => {
+    let resolveSource: ((value: unknown) => void) | undefined;
+    mocks.getObjectSource.mockReturnValue(new Promise((resolve) => (resolveSource = resolve)));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const id = store.openObjectSourceTabPending(pendingOptions({ name: "v_orders", objectType: "VIEW" }));
+
+    // 请求还没回来，tab 已经在界面上：这正是 #9035 缺的那一步
+    expect(store.tabs).toHaveLength(1);
+    const tab = store.tabs[0]!;
+    expect(tab.id).toBe(id);
+    expect(tab.title).toBe("Source - v_orders");
+    expect(tab.sourceView).toBe(true);
+    expect(tab.sql).toBe("");
+    expect(tab.objectSource).toBeUndefined();
+    expect(tab.sourceLoad?.error).toBeUndefined();
+    expect(tab.sourceLoad?.request).toEqual({ name: "v_orders", objectType: "VIEW", signature: undefined });
+    expect(tab.sourceLoad?.startedAt).toBeTypeOf("number");
+
+    resolveSource?.(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 1 FROM dual"));
+    await settle();
+  });
+
+  it("fills the same tab in place once the source resolves", async () => {
+    mocks.getObjectSource.mockResolvedValue(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 1 FROM dual"));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const id = store.openObjectSourceTabPending(pendingOptions({ name: "v_orders", objectType: "VIEW" }));
+    await settle();
+
+    expect(store.tabs).toHaveLength(1);
+    const tab = store.tabs[0]!;
+    expect(tab.id).toBe(id);
+    expect(tab.sql).toBe("CREATE OR REPLACE VIEW app.v_orders AS SELECT 1 FROM dual");
+    expect(tab.sourceView).toBe(true);
+    expect(tab.sourceLoad).toBeUndefined();
+    expect(tab.objectSource).toMatchObject({ schema: SCHEMA, name: "v_orders", objectType: "VIEW" });
+  });
+
+  it("keeps the resolved (fallback) object type on the tab, not the requested one", async () => {
+    // 请求 PROCEDURE，后端返回空 → routine fallback 回落到 FUNCTION
+    mocks.getObjectSource.mockImplementation(async (_connectionId, _database, _schema, _name, objectType: string) => objectSource(objectType === "FUNCTION" ? "CREATE OR REPLACE FUNCTION app.foo RETURN NUMBER IS BEGIN RETURN 1; END;" : ""));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    store.openObjectSourceTabPending(pendingOptions({ name: "foo", objectType: "PROCEDURE" }));
+    await settle();
+
+    expect(store.tabs[0]?.objectSource).toMatchObject({ name: "foo", objectType: "FUNCTION" });
+  });
+
+  it("surfaces a failure inside the tab and retries in place", async () => {
+    mocks.getObjectSource.mockRejectedValueOnce(new Error("ORA-00942: table or view does not exist"));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const id = store.openObjectSourceTabPending(pendingOptions({ name: "v_orders", objectType: "VIEW" }));
+    await settle();
+
+    const failed = store.tabs[0]!;
+    expect(failed.id).toBe(id);
+    expect(failed.sourceLoad?.error).toContain("ORA-00942");
+    expect(failed.sql).toBe("");
+    // 失败不吞掉 tab：用户就在这个 tab 里重试，而不是只收到一个 toast
+
+    mocks.getObjectSource.mockResolvedValueOnce(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 2 FROM dual"));
+    store.retryObjectSourceTab(id);
+    // 重试立即回到加载态（错误清空 → tab 栏重新转圈）
+    expect(store.tabs[0]?.sourceLoad?.error).toBeUndefined();
+    await settle();
+
+    expect(store.tabs).toHaveLength(1);
+    expect(store.tabs[0]?.sql).toBe("CREATE OR REPLACE VIEW app.v_orders AS SELECT 2 FROM dual");
+    expect(store.tabs[0]?.sourceLoad).toBeUndefined();
+  });
+
+  it("drops the result when the tab was closed while loading", async () => {
+    let resolveSource: ((value: unknown) => void) | undefined;
+    mocks.getObjectSource.mockReturnValue(new Promise((resolve) => (resolveSource = resolve)));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const id = store.openObjectSourceTabPending(pendingOptions({ name: "v_orders", objectType: "VIEW" }));
+    store.closeTab(id);
+    expect(store.tabs).toHaveLength(0);
+
+    resolveSource?.(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 1 FROM dual"));
+    await settle();
+
+    // 关掉就是放弃：不重建 tab、不写入已关闭的容器
+    expect(store.tabs).toHaveLength(0);
+  });
+
+  it("reuses the pending tab and the in-flight request on a repeat click", async () => {
+    let resolveSource: ((value: unknown) => void) | undefined;
+    mocks.getObjectSource.mockReturnValue(new Promise((resolve) => (resolveSource = resolve)));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const options = pendingOptions({ name: "v_orders", objectType: "VIEW" });
+    const first = store.openObjectSourceTabPending(options);
+    const second = store.openObjectSourceTabPending(options);
+
+    expect(second).toBe(first);
+    expect(store.tabs).toHaveLength(1);
+
+    // 第二次点击发生在请求真正发出之前（loader 先 await ensureConnected），
+    // 所以这里要等微任务落定后再确认只发了一次请求
+    await settle();
+    expect(mocks.getObjectSource).toHaveBeenCalledTimes(1);
+
+    resolveSource?.(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 1 FROM dual"));
+    await settle();
+    expect(store.tabs).toHaveLength(1);
+  });
+
+  it("reuses an already loaded tab instantly and revalidates it in the background", async () => {
+    mocks.getObjectSource.mockResolvedValue(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 1 FROM dual"));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const options = pendingOptions({ name: "v_orders", objectType: "VIEW" });
+    const first = store.openObjectSourceTabPending(options);
+    await settle();
+    expect(mocks.getObjectSource).toHaveBeenCalledTimes(1);
+    expect(store.activeTabId).toBe(first);
+
+    // 重复打开：不出现第二个转圈 tab，立刻回到同一个 tab，也不进加载态
+    mocks.getObjectSource.mockResolvedValueOnce(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 2 FROM dual"));
+    expect(store.openObjectSourceTabPending(options)).toBe(first);
+    expect(store.tabs).toHaveLength(1);
+    expect(store.tabs[0]?.sourceLoad).toBeUndefined();
+    // 复用路径不经过 ensureConnected，但树上动作的惯例仍是把该连接设为当前连接
+    expect(mocks.connectionStore.activeConnectionId).toBe(CONNECTION_ID);
+
+    await settle();
+    // 后台重新校验：重开拿到的是最新 DDL（改动前每次打开都会重新取源，
+    // 而源码 tab 没有别的刷新入口，所以复用不能省掉这次校验）
+    expect(mocks.getObjectSource).toHaveBeenCalledTimes(2);
+    expect(store.tabs[0]?.sql).toBe("CREATE OR REPLACE VIEW app.v_orders AS SELECT 2 FROM dual");
+    expect(store.tabs[0]?.sourceLoad).toBeUndefined();
+  });
+
+  it("never clobbers unsaved edits when revalidating in the background", async () => {
+    mocks.getObjectSource.mockResolvedValue(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 1 FROM dual"));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const options = pendingOptions({ name: "v_orders", objectType: "VIEW" });
+    const id = store.openObjectSourceTabPending(options);
+    await settle();
+
+    // 用户在源码 tab 里改了内容（未保存）
+    store.updateSql(id, "CREATE OR REPLACE VIEW app.v_orders AS SELECT 999 FROM dual");
+
+    mocks.getObjectSource.mockResolvedValueOnce(objectSource("CREATE OR REPLACE VIEW app.v_orders AS SELECT 2 FROM dual"));
+    store.openObjectSourceTabPending(options);
+    await settle();
+
+    expect(store.tabs[0]?.sql).toContain("SELECT 999");
+    expect(store.tabs[0]?.originalSql).not.toBe(store.tabs[0]?.sql);
+  });
+
+  it("hands the loaded source to an existing tab that already matches the resolved identity", async () => {
+    // 已有一个解析为 FUNCTION 的 tab；本次请求的是 PROCEDURE（树的类型可能是错的），
+    // 前置复用检查匹配不上，只能先开 pending，等 fallback 解析出 FUNCTION 后再交接。
+    mocks.getObjectSource.mockImplementation(async (_connectionId, _database, _schema, _name, objectType: string) => objectSource(objectType === "FUNCTION" ? "CREATE OR REPLACE FUNCTION app.foo RETURN NUMBER IS BEGIN RETURN 1; END;" : ""));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    const existingId = store.openObjectSourceTab({
+      connectionId: CONNECTION_ID,
+      database: DATABASE,
+      title: "Source - foo",
+      schema: SCHEMA,
+      sql: "CREATE OR REPLACE FUNCTION app.foo RETURN NUMBER IS BEGIN RETURN 0; END;",
+      objectSource: { schema: SCHEMA, name: "foo", objectType: "FUNCTION" },
+    });
+
+    const pendingId = store.openObjectSourceTabPending(pendingOptions({ name: "foo", objectType: "PROCEDURE" }));
+    expect(store.tabs).toHaveLength(2);
+    expect(pendingId).not.toBe(existingId);
+
+    await settle();
+
+    // pending 占位交接给既有 tab，不留下同一个对象的第二个 tab
+    expect(store.tabs).toHaveLength(1);
+    expect(store.tabs[0]?.id).toBe(existingId);
+    expect(store.tabs[0]?.sql).toBe("CREATE OR REPLACE FUNCTION app.foo RETURN NUMBER IS BEGIN RETURN 1; END;");
+    expect(store.tabs[0]?.sourceLoad).toBeUndefined();
+  });
+
+  it("honors backend editability: read-only sources load as a plain source tab", async () => {
+    mocks.getObjectSource.mockResolvedValue(objectSource("CREATE SEQUENCE app.seq_users", false));
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+
+    store.openObjectSourceTabPending(pendingOptions({ name: "seq_users", objectType: "VIEW" }));
+    await settle();
+
+    const tab = store.tabs[0]!;
+    expect(tab.sql).toBe("CREATE SEQUENCE app.seq_users");
+    expect(tab.sourceView).toBe(true);
+    expect(tab.objectSource).toBeUndefined();
+    expect(tab.sourceLoad).toBeUndefined();
+  });
+});
diff --git a/apps/desktop/src/stores/queryStore.ts b/apps/desktop/src/stores/queryStore.ts
index 919ac8844c..de0ba3f8ef 100644
--- a/apps/desktop/src/stores/queryStore.ts
+++ b/apps/desktop/src/stores/queryStore.ts
@@ -5,7 +5,7 @@ import { uuid } from "@/lib/common/utils";
 import { computed, markRaw, nextTick, onScopeDispose, reactive, ref, watch } from "vue";
 import { useI18n } from "vue-i18n";
 import { sanitizeTabPageUiState } from "@/lib/tabs/tabUiState";
-import type { BatchSqlExecution, ConnectionConfig, DatabaseType, IndexInfo, NacosConfigEditorViewport, ObjectBrowserFilter, ObjectBrowserViewport, QueryResult, QueryResultSourceColumnRef, QueryTab, TableInfoTab, TableStructureEditorTarget } from "@/types/database";
+import type { BatchSqlExecution, ConnectionConfig, DatabaseType, IndexInfo, NacosConfigEditorViewport, ObjectBrowserFilter, ObjectBrowserViewport, ObjectSource, ObjectSourceKind, QueryResult, QueryResultSourceColumnRef, QueryTab, TableInfoTab, TableStructureEditorTarget } from "@/types/database";
 import { orderPinnedFirst } from "@/lib/app/pinnedItems";
 import { canCancelQueryExecution } from "@/lib/sql/queryExecutionState";
 import { buildExplainSql, parseExplainResult, parseDamengExplainText, parseOracleExplainText, sqlServerExplainResult, type BuildExplainSqlResult, type ExplainPlanDatabaseType } from "@/lib/diagram/explainPlan";
@@ -92,6 +92,8 @@ import { ensureSqlExtension } from "@/lib/savedSql/savedSqlFileName";
 import { resolveSavedSqlExecutionTarget, savedSqlExecutionTargetFromTab, type SavedSqlExecutionTarget, type SavedSqlOpenTargetMode } from "@/lib/savedSql/savedSqlExecutionTarget";
 import { safeLocalStorageGet, safeLocalStorageRemove } from "@/lib/backend/safeStorage";
 import { sqlTextFingerprint } from "@/lib/sql/sqlTextFingerprint";
+import { loadEditableObjectSourceForEditor } from "@/lib/table/objectSourceLoad";
+import { buildEditableObjectSource } from "@/lib/table/objectSourceEditor";
 import { disposeAllSqlServerActivityTraces, disposeSqlServerActivityTrace } from "@/lib/sqlserver/sqlServerActivityTraceRuntime";
 import type { SavedSqlFile } from "@/types/database";
 import i18n, { currentLocale } from "@/i18n";
@@ -176,6 +178,32 @@ interface OpenObjectSourceTabOptions {
   objectSource: NonNullable<QueryTab["objectSource"]>;
 }
 
+/**
+ * 请求身份：`objectSource.objectType` 要等 routine fallback 跑完才知道，所以
+ * pending 去重只能按请求时的身份判定。请求身份必须含 objectType —— PACKAGE 与
+ * PACKAGE_BODY 同名同 schema，仅靠 name+schema 会错误合并。
+ */
+interface ObjectSourceRequestIdentity {
+  name: string;
+  objectType: ObjectSourceKind;
+  signature?: string;
+}
+
+interface OpenPendingObjectSourceTabOptions {
+  connectionId: string;
+  database: string;
+  title: string;
+  schema?: string;
+  catalog?: string;
+  request: ObjectSourceRequestIdentity;
+}
+
+/**
+ * 拿到源码也没有可编辑形态的对象类型：只填内容，不挂 objectSource。
+ * （`App.vue` 的 Ctrl+click 路径有一份少了 `JOB` 的旧副本，是既有不一致。）
+ */
+const OBJECT_SOURCE_READ_ONLY_TYPES: readonly ObjectSourceKind[] = ["SEQUENCE", "TRIGGER", "TYPE", "TYPE_BODY", "JOB"];
+
 interface UpdateExecutionTargetOptions {
   persistSavedSqlTarget?: boolean;
 }
@@ -2560,9 +2588,17 @@ export const useQueryStore = defineStore("query", () => {
     });
   }
 
-  function openObjectSourceTab(options: OpenObjectSourceTabOptions) {
-    const existing = tabs.value.find(
+  /**
+   * 对象源码 tab 的判重键。裁决点是**解析后**的 objectSource.objectType：
+   * routine fallback 会把 PROCEDURE↔FUNCTION、PACKAGE↔PACKAGE_BODY 归一，
+   * 因此「PROCEDURE foo」与「FUNCTION foo」应当共用一个 tab。pending 阶段
+   * 拿不到解析结果，只能做请求身份去重（见 openObjectSourceTabPending），
+   * 解析完成后再回到这里落定，避免改变既有语义。
+   */
+  function findMatchingObjectSourceTab(options: OpenObjectSourceTabOptions, excludeTabId?: string): QueryTab | undefined {
+    return tabs.value.find(
       (tab) =>
+        tab.id !== excludeTabId &&
         tab.mode === "query" &&
         tab.connectionId === options.connectionId &&
         tab.database === options.database &&
@@ -2573,6 +2609,10 @@ export const useQueryStore = defineStore("query", () => {
         (tab.objectSource.schema || "") === (options.objectSource.schema || "") &&
         (tab.objectSource.signature || "") === (options.objectSource.signature || ""),
     );
+  }
+
+  function openObjectSourceTab(options: OpenObjectSourceTabOptions) {
+    const existing = findMatchingObjectSourceTab(options);
     if (existing) {
       existing.sourceView = true;
       switchTab(existing.id);
@@ -2588,6 +2628,212 @@ export const useQueryStore = defineStore("query", () => {
     return id;
   }
 
+  /**
+   * 正在后台重新校验源码的 tab。非响应式：仅用于避免同一个 tab 上叠起多次
+   * 取源请求（Oracle 的 GET_DDL 正是慢的那一步）。
+   */
+  const sourceRevalidateInFlight = new Set<string>();
+
+  function findPendingObjectSourceTab(options: OpenPendingObjectSourceTabOptions): QueryTab | undefined {
+    return tabs.value.find(
+      (tab) =>
+        !!tab.sourceLoad &&
+        tab.connectionId === options.connectionId &&
+        tab.database === options.database &&
+        (tab.schema || "") === (options.schema || "") &&
+        (tab.catalog || "") === (options.catalog || "") &&
+        tab.sourceLoad.request.name === options.request.name &&
+        tab.sourceLoad.request.objectType === options.request.objectType &&
+        (tab.sourceLoad.request.signature || "") === (options.request.signature || ""),
+    );
+  }
+
+  /**
+   * 立即建出源码 tab 并挂上加载态，再异步取源码（issue #9035）。
+   * 此前是「等连接 + 等源码都完成才建 tab」，等待期间没有任何可见 UI，
+   * 用户看到的是点击后毫无反应。
+   */
+  function openObjectSourceTabPending(options: OpenPendingObjectSourceTabOptions): string {
+    // 这个对象已经打开过：立刻切过去，再在后台重新校验源码。
+    // 两条弯路都要避开 —— 再建一个 pending tab 会让界面上多出一个转圈 tab，
+    // 随后又被交接逻辑关掉；而只切过去不校验，会让重开看到的是旧 DDL
+    // （改动前每次打开都会重新取源，源码 tab 没有其它刷新入口）。
+    const loaded = findMatchingObjectSourceTab({
+      connectionId: options.connectionId,
+      database: options.database,
+      title: options.title,
+      schema: options.schema,
+      catalog: options.catalog,
+      sql: "",
+      objectSource: { schema: options.schema, name: options.request.name, objectType: options.request.objectType, signature: options.request.signature },
+    });
+    if (loaded) {
+      loaded.sourceView = true;
+      switchTab(loaded.id);
+      // 这条路径不经过 ensureConnected，但树上的动作会把该连接设为当前连接
+      useConnectionStore().activeConnectionId = options.connectionId;
+      void revalidateObjectSourceTab(loaded.id);
+      return loaded.id;
+    }
+
+    const existing = findPendingObjectSourceTab(options);
+    if (existing) {
+      switchTab(existing.id);
+      // 再次点击同一对象 = 再试一次，不新开 tab、不重复占用一个 tab 位
+      if (existing.sourceLoad?.error) retryObjectSourceTab(existing.id);
+      return existing.id;
+    }
+
+    const id = createTab(options.connectionId, options.database, options.title, "query", options.schema, "", options.catalog, { forceNew: true, sourceView: true });
+    const tab = tabs.value.find((candidate) => candidate.id === id);
+    if (tab) tab.sourceLoad = { startedAt: Date.now(), request: { ...options.request } };
+    void loadObjectSourceIntoTab(id);
+    return id;
+  }
+
+  /**
+   * 后台重新校验一个已加载源码 tab 的 DDL：不占用加载态、不打断编辑，
+   * 失败就保持原内容（用户并没有在等这次请求）。
+   */
+  async function revalidateObjectSourceTab(id: string) {
+    if (sourceRevalidateInFlight.has(id)) return;
+    const tab = tabs.value.find((candidate) => candidate.id === id);
+    const objectSource = tab?.objectSource;
+    if (!tab || !objectSource) return;
+    const { connectionId } = tab;
+    const { database } = tab;
+    const schema = objectSource.schema || tab.schema || database;
+    sourceRevalidateInFlight.add(id);
+    try {
+      const connectionStore = useConnectionStore();
+      await connectionStore.ensureConnected(connectionId);
+      const databaseType = effectiveDatabaseTypeForConnection(connectionStore.getConfig(connectionId));
+      if (!databaseType) return;
+      const {
+        raw,
+        editableSource,
+        objectType: resolvedType,
+      } = await loadEditableObjectSourceForEditor(api.getObjectSource, buildEditableObjectSource, {
+        connectionId,
+        database,
+        schema,
+        name: objectSource.name,
+        objectType: objectSource.objectType,
+        databaseType,
+        signature: objectSource.signature,
+      });
+      // 期间 tab 可能被关闭、被复用或已被编辑：身份没变且用户没改过内容时才回填
+      const current = tabs.value.find((candidate) => candidate.id === id);
+      if (current?.objectSource !== objectSource || resolvedType !== objectSource.objectType) return;
+      if (raw.editable === false || OBJECT_SOURCE_READ_ONLY_TYPES.includes(resolvedType)) return;
+      if (isTabDirty(current)) return;
+      updateSql(id, editableSource);
+      markTabClean(current);
+    } catch {
+      // 已有的源码依然可用，静默保留
+    } finally {
+      sourceRevalidateInFlight.delete(id);
+    }
+  }
+
+  function retryObjectSourceTab(id: string) {
+    const tab = tabs.value.find((candidate) => candidate.id === id);
+    if (!tab?.sourceLoad) return;
+    tab.sourceLoad.error = undefined;
+    tab.sourceLoad.startedAt = Date.now();
+    void loadObjectSourceIntoTab(id);
+  }
+
+  function clearObjectSourceLoad(tab: QueryTab) {
+    tab.sourceLoad = undefined;
+  }
+
+  async function loadObjectSourceIntoTab(id: string) {
+    const tab = tabs.value.find((candidate) => candidate.id === id);
+    if (!tab?.sourceLoad || !tab.connectionId) return;
+    const { connectionId } = tab;
+    const { database } = tab;
+    const schema = tab.schema || database;
+    const { request } = tab.sourceLoad;
+    try {
+      const connectionStore = useConnectionStore();
+      await connectionStore.ensureConnected(connectionId);
+      connectionStore.activeConnectionId = connectionId;
+      const databaseType = effectiveDatabaseTypeForConnection(connectionStore.getConfig(connectionId));
+      if (!databaseType) throw new Error("Connection type is unavailable.");
+      const {
+        raw,
+        editableSource,
+        objectType: resolvedType,
+      } = await loadEditableObjectSourceForEditor(api.getObjectSource, buildEditableObjectSource, {
+        connectionId,
+        database,
+        schema,
+        name: request.name,
+        objectType: request.objectType,
+        databaseType,
+        signature: request.signature,
+      });
+      applyLoadedObjectSource(id, { connectionId, database, schema, catalog: tab.catalog, title: tab.title, request, editableSource, raw, resolvedType });
+    } catch (e: any) {
+      // 就地显示错误 + Retry：用户此刻正看着这个 tab，比 toast 更可发现
+      const failed = tabs.value.find((candidate) => candidate.id === id);
+      if (failed?.sourceLoad) failed.sourceLoad.error = e?.message || String(e);
+    }
+  }
+
+  function applyLoadedObjectSource(
+    id: string,
+    loaded: {
+      connectionId: string;
+      database: string;
+      schema?: string;
+      catalog?: string;
+      title: string;
+      request: ObjectSourceRequestIdentity;
+      editableSource: string;
+      raw: ObjectSource;
+      resolvedType: ObjectSourceKind;
+    },
+  ) {
+    // 加载期间 tab 被关掉（用户放弃）或连接被断开：静默丢弃，不重建、不写库
+    const tab = tabs.value.find((candidate) => candidate.id === id);
+    if (!tab?.sourceLoad) return;
+    const sourceIsEditable = loaded.raw.editable !== false && !OBJECT_SOURCE_READ_ONLY_TYPES.includes(loaded.resolvedType);
+    if (sourceIsEditable) {
+      const options: OpenObjectSourceTabOptions = {
+        connectionId: loaded.connectionId,
+        database: loaded.database,
+        title: loaded.title,
+        schema: loaded.schema,
+        catalog: loaded.catalog,
+        sql: loaded.editableSource,
+        objectSource: { schema: loaded.schema, name: loaded.request.name, objectType: loaded.resolvedType, signature: loaded.request.signature },
+      };
+      // 解析后的身份可能命中已存在的 tab（例：先按 FUNCTION 打开过，这次请求的是 PROCEDURE）。
+      // 有则交接给它并关掉 pending 占位，避免同一个对象出现两个 tab。
+      const existing = findMatchingObjectSourceTab(options, id);
+      if (existing) {
+        clearObjectSourceLoad(tab);
+        closeTab(id);
+        existing.sourceView = true;
+        switchTab(existing.id);
+        if (!isTabDirty(existing)) {
+          updateSql(existing.id, loaded.editableSource);
+          markTabClean(existing);
+        }
+        return;
+      }
+      updateSql(id, loaded.editableSource);
+      setObjectSource(id, options.objectSource);
+    } else {
+      updateSql(id, loaded.editableSource);
+    }
+    tab.sourceView = true;
+    markTabClean(tab);
+    clearObjectSourceLoad(tab);
+  }
+
   function showExecutedQueryResults(connectionId: string, database: string, sql: string, queryResults: QueryResult[]) {
     const id = createTab(connectionId, database, undefined, "query", undefined, sql);
     const tab = tabs.value.find((item) => item.id === id);
@@ -8155,6 +8401,8 @@ export const useQueryStore = defineStore("query", () => {
     isConfirmingAppClose,
     createTab,
     openObjectSourceTab,
+    openObjectSourceTabPending,
+    retryObjectSourceTab,
     showExecutedQueryResults,
     focusGroup,
     activateTab,
diff --git a/apps/desktop/src/types/database.ts b/apps/desktop/src/types/database.ts
index 730b1f52b9..6e0b6fa268 100644
--- a/apps/desktop/src/types/database.ts
+++ b/apps/desktop/src/types/database.ts
@@ -1667,6 +1667,29 @@ export interface QueryTab {
     objectType: ObjectSourceKind;
     signature?: string;
   };
+  /**
+   * 「先出 UI 再加载」的中间态：源码 tab 已经可见，但源码还在路上
+   * （ensureConnected + getObjectSource）。让 tab 栏与编辑区在等待期间就有反馈，
+   * 失败时就地显示错误 + Retry，而不是等到加载完才建 tab、失败只弹 toast。
+   *
+   * 纯运行期字段，刻意不进 openTabsPersistence 的落盘白名单：重启后恢复出的
+   * tab 只是普通空 tab，不会永久停在「加载中」。
+   */
+  sourceLoad?: {
+    startedAt: number;
+    /** 加载失败时写入；保留 request 以便就地重试 */
+    error?: string;
+    /**
+     * 重试所需的请求身份。与 `objectSource` 分开保存：objectType 在这里是
+     * **请求时**的类型，而 `objectSource.objectType` 是 routine fallback
+     * 解析后的类型（PROCEDURE↔FUNCTION、PACKAGE↔PACKAGE_BODY 会被改写）。
+     */
+    request: {
+      name: string;
+      objectType: ObjectSourceKind;
+      signature?: string;
+    };
+  };
   tableComment?: string | null;
   tableMeta?: {
     schema?: string;
diff --git a/packages/app-tests/objectSourceOpenFeedback.test.ts b/packages/app-tests/objectSourceOpenFeedback.test.ts
new file mode 100644
index 0000000000..d4f5410e81
--- /dev/null
+++ b/packages/app-tests/objectSourceOpenFeedback.test.ts
@@ -0,0 +1,89 @@
+import { strict as assert } from "node:assert";
+import { readFileSync } from "node:fs";
+import { test } from "vitest";
+
+function read(relativePath: string): string {
+  return readFileSync(relativePath, "utf8");
+}
+
+function functionBody(source: string, name: string): string {
+  const signature = `function ${name}(`;
+  const asyncSignature = `async ${signature}`;
+  const signatureIndex = source.indexOf(asyncSignature) >= 0 ? source.indexOf(asyncSignature) : source.indexOf(signature);
+  assert.notEqual(signatureIndex, -1, `Could not find function ${name}`);
+  const bodyStart = source.indexOf("{", signatureIndex);
+  assert.notEqual(bodyStart, -1, `Could not find body for ${name}`);
+
+  let depth = 0;
+  for (let index = bodyStart; index < source.length; index += 1) {
+    const char = source[index];
+    if (char === "{") depth += 1;
+    if (char === "}") {
+      depth -= 1;
+      if (depth === 0) return source.slice(bodyStart + 1, index);
+    }
+  }
+  throw new Error(`Could not parse body for ${name}`);
+}
+
+// issue #9035：打开对象源码必须「先出 UI 再加载」。加载态要有可见落点
+// （tab 栏 + tab 内容区）、失败要能就地重试、连接建立也要罩在弹窗的加载态之内。
+test("object source loading feedback is visible in the tab bar and the tab body", () => {
+  const contentArea = read("apps/desktop/src/components/layout/ContentArea.vue");
+  const tabStatus = read("apps/desktop/src/components/layout/TabExecutionStatus.vue");
+
+  assert.match(contentArea, /activeTab\.sourceLoad && !activeTab\.sourceLoad\.error/);
+  assert.match(contentArea, /:elapsed-seconds="sourceLoadElapsedSeconds"/);
+  assert.match(contentArea, /data-object-source-load-error/);
+  assert.match(contentArea, /queryStore\.retryObjectSourceTab\(activeTab\.id\)/);
+
+  assert.match(tabStatus, /props\.tab\.sourceLoad && !props\.tab\.sourceLoad\.error/);
+  // 失败态由内容区的错误 + Retry 表达，tab 栏不应继续转圈
+  assert.match(tabStatus, /labelKey/);
+});
+
+test("the object source dialog owns the connection it waits for", () => {
+  const dialog = read("apps/desktop/src/components/objects/ObjectSourceDialog.vue");
+  const loadBody = functionBody(dialog, "loadSource");
+
+  // 调用方不再先 await ensureConnected 才开弹窗，连接必须发生在弹窗的 loading 之内
+  const connectIndex = loadBody.indexOf("ensureConnected");
+  const fetchIndex = loadBody.indexOf("loadObjectSourceWithRoutineFallback");
+  assert.ok(connectIndex >= 0, "ObjectSourceDialog.loadSource must own ensureConnected");
+  assert.ok(fetchIndex >= 0, "ObjectSourceDialog.loadSource must fetch the source");
+  assert.ok(connectIndex < fetchIndex, "connect must happen before the source fetch");
+});
+
+test("query-tab entry no longer blocks the sidebar on connect", () => {
+  const connectionTree = read("apps/desktop/src/components/sidebar/ConnectionTree.vue");
+  const openBody = functionBody(connectionTree, "openSidebarObjectSource");
+
+  // 弹窗立即挂载；此前的 await ensureConnected 制造了没有反馈的死等窗口
+  // （断言调用形态，注释里提到这个名字不算）
+  assert.doesNotMatch(openBody, /ensureConnected\(/);
+  assert.match(openBody, /sidebarObjectSourceOpen\.value = true/);
+});
+
+test("query-editor object source entry uses the same visible loading path", () => {
+  const app = read("apps/desktop/src/App.vue");
+  const openBody = functionBody(app, "onOpenObjectSource");
+
+  assert.match(openBody, /queryStore\.openObjectSourceTabPending\(\{/);
+  assert.match(openBody, /queryEditorObjectSourceTarget\.value =/);
+  assert.match(openBody, /showQueryEditorObjectSourceDialog\.value = true/);
+  assert.doesNotMatch(openBody, /ensureConnected\(/);
+  assert.doesNotMatch(openBody, /api\.getObjectSource\(/);
+});
+
+test("object source load state is runtime-only and never restored from disk", () => {
+  const persistence = read("apps/desktop/src/lib/app/openTabsPersistence.ts");
+  const types = read("apps/desktop/src/types/database.ts");
+  const serializeBody = functionBody(persistence, "serializeOpenTabs");
+
+  // tab 类型上带着重试所需的请求身份
+  assert.match(types, /sourceLoad\?: \{/);
+  assert.match(types, /request: \{\n\s+name: string;\n\s+objectType: ObjectSourceKind;/);
+  // 不落盘：否则重启后 tab 会永久停在「加载中」
+  assert.doesNotMatch(serializeBody, /sourceLoad/);
+  assert.match(persistence, /sourceLoad: undefined/);
+});
diff --git a/packages/app-tests/sidebarContextMenuHost.test.ts b/packages/app-tests/sidebarContextMenuHost.test.ts
index 5e5e99ebd9..1af43c01fa 100644
--- a/packages/app-tests/sidebarContextMenuHost.test.ts
+++ b/packages/app-tests/sidebarContextMenuHost.test.ts
@@ -22,6 +22,20 @@ function functionBody(source: string, name: string): string {
   throw new Error(`Could not parse body for ${name}`);
 }
 
+/**
+ * Region of one top-level function in a store/component module. Unlike
+ * `functionBody`, this survives inline object type literals in the parameter
+ * list (the first `{` there is not the body).
+ */
+function functionRegion(source: string, name: string): string {
+  const candidates = [`  async function ${name}(`, `  function ${name}(`].map((marker) => source.indexOf(marker)).filter((index) => index >= 0);
+  assert.notEqual(candidates.length, 0, `Could not find function ${name}`);
+  const start = Math.min(...candidates);
+  const rest = source.slice(start + 1);
+  const next = /\n  (?:async )?function /.exec(rest);
+  return next ? rest.slice(0, next.index) : rest;
+}
+
 test("tree-level context menu opens with the current row items atomically", () => {
   const connectionTree = readFileSync("apps/desktop/src/components/sidebar/ConnectionTree.vue", "utf8");
   const contextMenu = readFileSync("apps/desktop/src/components/ui/CustomContextMenu.vue", "utf8");
@@ -60,18 +74,46 @@ test("tree host owns sidebar data-open generations", () => {
   assert.match(connectionTree, /createSidebarActionTarget\(node\)/);
 });
 
-test("query-tab object source uses canonical identity and honors backend editability", () => {
+test("query-tab object source opens the tab before connecting or loading", () => {
   const runtimeHost = readFileSync("apps/desktop/src/components/sidebar/SidebarTreeRuntimeHost.vue", "utf8");
   const openObjectSourceBody = functionBody(runtimeHost, "openObjectSourceDialog");
 
-  assert.match(openObjectSourceBody, /queryStore\.openObjectSourceTab\(\{/);
-  assert.match(openObjectSourceBody, /raw\.editable !== false/);
-  assert.match(openObjectSourceBody, /!\["SEQUENCE", "TRIGGER", "TYPE", "TYPE_BODY", "JOB"\]\.includes\(resolvedType\)/);
-  assert.match(openObjectSourceBody, /objectType: resolvedType/);
-  assert.match(openObjectSourceBody, /signature: node\.signature/);
-  assert.match(openObjectSourceBody, /createTab\(connectionId, database, `Source - \$\{node\.label\}`, "query", schema, editableSource, node\.catalog, \{ forceNew: true, sourceView: true \}\)/);
-  assert.doesNotMatch(openObjectSourceBody, /queryStore\.updateSql/);
-  assert.doesNotMatch(openObjectSourceBody, /queryStore\.markTabClean/);
+  // #9035：点击后立刻建出带加载态的 tab/弹窗，ensureConnected 与 getObjectSource
+  // 都必须发生在已挂载的 UI 之内，而不是先 await 完再挂载（那样界面没有任何反馈）。
+  assert.match(openObjectSourceBody, /queryStore\.openObjectSourceTabPending\(\{/);
+  assert.match(openObjectSourceBody, /objectType: sourceTarget\.objectType/);
+  assert.match(openObjectSourceBody, /signature: sourceNode\.signature/);
+  assert.match(openObjectSourceBody, /emit\("open-object-source", sourceNode, initialEditing\)/);
+  // 断言「调用形态」而不是词本身：这段代码里注释会提到这两个名字
+  assert.doesNotMatch(openObjectSourceBody, /ensureConnected\(/);
+  assert.doesNotMatch(openObjectSourceBody, /api\.getObjectSource\(/);
+  assert.doesNotMatch(openObjectSourceBody, /toast\(/);
+});
+
+test("object source identity and editability are enforced in queryStore", () => {
+  const queryStore = readFileSync("apps/desktop/src/stores/queryStore.ts", "utf8");
+  const findBody = functionRegion(queryStore, "findMatchingObjectSourceTab");
+  const pendingBody = functionRegion(queryStore, "openObjectSourceTabPending");
+  const applyBody = functionRegion(queryStore, "applyLoadedObjectSource");
+
+  // canonical identity：连接 + 库 + schema + catalog + 解析后的对象身份共同决定复用哪个 tab
+  assert.match(findBody, /tab\.objectSource\?\.name === options\.objectSource\.name/);
+  assert.match(findBody, /tab\.objectSource\.objectType === options\.objectSource\.objectType/);
+  assert.match(findBody, /\(tab\.objectSource\.schema \|\| ""\) === \(options\.objectSource\.schema \|\| ""\)/);
+  assert.match(findBody, /\(tab\.objectSource\.signature \|\| ""\) === \(options\.objectSource\.signature \|\| ""\)/);
+
+  // honor backend editability：只读源码不挂 objectSource，但仍是一个 sourceView tab
+  assert.match(applyBody, /raw\.editable !== false/);
+  assert.match(applyBody, /OBJECT_SOURCE_READ_ONLY_TYPES\.includes\(loaded\.resolvedType\)/);
+  assert.match(applyBody, /tab\.sourceView = true/);
+  assert.match(queryStore, /const OBJECT_SOURCE_READ_ONLY_TYPES: readonly ObjectSourceKind\[\] = \["SEQUENCE", "TRIGGER", "TYPE", "TYPE_BODY", "JOB"\]/);
+
+  // pending 占位：同步返回（不 await），tab 已可见并带着可重试的请求身份
+  assert.doesNotMatch(pendingBody, /await /);
+  assert.match(pendingBody, /tab\.sourceLoad = \{ startedAt: Date\.now\(\), request: \{ \.\.\.options\.request \} \}/);
+  assert.match(pendingBody, /void loadObjectSourceIntoTab\(id\)/);
+  // 落地时清掉加载态，否则 tab 会永远停在转圈
+  assert.match(applyBody, /clearObjectSourceLoad\(tab\)/);
 });
 
 test("table copy menu uses the shared single and multi-selection clipboard path", () => {