diff --git a/apps/desktop/src/components/objects/ObjectBrowser.vue b/apps/desktop/src/components/objects/ObjectBrowser.vue
index c82779656a..d717cd2d5e 100644
--- a/apps/desktop/src/components/objects/ObjectBrowser.vue
+++ b/apps/desktop/src/components/objects/ObjectBrowser.vue
@@ -1011,6 +1011,9 @@ function executeRowAction(row: ObjectBrowserRow, action: ObjectBrowserRowAction)
     case "open-source":
       void (row.type === "EVENT" ? openEventEditor(row) : openSource(row));
       break;
+    case "open-source-tab":
+      openSourceTab(row);
+      break;
   }
 }
 
@@ -1038,7 +1041,7 @@ function onRowClick(row: ObjectBrowserRow, event: MouseEvent) {
   const activation = settingsStore.editorSettings.sidebarActivation;
   const { action, isDouble } = resolveRowClickAction(row, event.detail, activation, effectiveDatabaseType.value);
   // Double click: cancel any pending single-click and fire immediately. When
-  // the row's single/double actions are identical (e.g. VIEW → open-source),
+  // the row's single/double actions are identical (e.g. SEQUENCE → open-source),
   // this gesture's first click already ran it — re-executing would toggle the
   // just-opened side panel back off (or emit open-table twice for MongoDB).
   if (isDouble) {
@@ -1559,6 +1562,24 @@ function openTableStructureEditor() {
   queryStore.openTableStructure(props.connection.id, props.database, row.schema || selectedSchema.value, row.name, tableInfoTab.value, undefined, props.catalog);
 }
 
+/**
+ * Double-clicking a routine opens its source as an editable query tab
+ * (issue #10202), the same container the sidebar and editor navigation use.
+ * The store owns connection setup, source loading and tab de-duplication, so
+ * this path deliberately does not fall back to the side panel.
+ */
+function openSourceTab(row: ObjectBrowserRow) {
+  queryStore.openObjectSourceTabPending({
+    connectionId: props.connection.id,
+    database: props.database,
+    title: `Source - ${row.displayName || row.name}`,
+    schema: row.schema || selectedSchema.value || props.database,
+    catalog: props.catalog,
+    initialEditing: true,
+    request: { name: row.name, objectType: row.type as ObjectSourceKind, signature: row.signature ?? undefined },
+  });
+}
+
 async function openSource(row: ObjectBrowserRow) {
   // Toggle off if clicking the same source row
   if (sidePanelRow.value?.id === row.id && sidePanelMode.value === "source") {
diff --git a/apps/desktop/src/components/objects/__tests__/ObjectBrowser.routineSourceTab.component.spec.ts b/apps/desktop/src/components/objects/__tests__/ObjectBrowser.routineSourceTab.component.spec.ts
new file mode 100644
index 0000000000..339cf7d682
--- /dev/null
+++ b/apps/desktop/src/components/objects/__tests__/ObjectBrowser.routineSourceTab.component.spec.ts
@@ -0,0 +1,200 @@
+// @vitest-environment happy-dom
+
+import { createApp, defineComponent, h, ref, type App } from "vue";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import ObjectBrowser from "@/components/objects/ObjectBrowser.vue";
+import { invalidateObjectBrowserRowsCache } from "@/lib/table/objectBrowserRowsCache";
+import type { ConnectionConfig } from "@/types/database";
+
+const mocks = vi.hoisted(() => ({
+  listObjects: vi.fn(),
+  listSchemas: vi.fn(),
+  getObjectSource: vi.fn(),
+  buildEditableObjectSource: vi.fn(),
+  ensureConnected: vi.fn(),
+  openObjectSourceTabPending: vi.fn(),
+  toast: vi.fn(),
+}));
+
+vi.mock("@/lib/backend/api", () => ({
+  listObjects: (...args: unknown[]) => mocks.listObjects(...args),
+  listSchemas: (...args: unknown[]) => mocks.listSchemas(...args),
+  listObjectStatistics: vi.fn().mockResolvedValue([]),
+  getObjectSource: (...args: unknown[]) => mocks.getObjectSource(...args),
+  buildEditableObjectSource: (...args: unknown[]) => mocks.buildEditableObjectSource(...args),
+}));
+vi.mock("@/stores/connectionStore", () => ({
+  useConnectionStore: () => ({
+    treeClipboard: null,
+    ensureConnected: mocks.ensureConnected,
+    getConfig: () => connection,
+    orderByPinnedTreeNodes: (rows: unknown[]) => rows,
+  }),
+}));
+vi.mock("@/stores/queryStore", () => ({
+  useQueryStore: () => ({ openObjectSourceTabPending: mocks.openObjectSourceTabPending }),
+}));
+vi.mock("@/stores/settingsStore", () => ({
+  useSettingsStore: () => ({
+    editorSettings: {
+      shortcuts: { refreshData: "F5" },
+      objectBrowserViewMode: "list",
+      objectBrowserShowCheckbox: false,
+      sidebarActivation: "single",
+    },
+  }),
+}));
+vi.mock("vue-i18n", () => ({ useI18n: () => ({ t: (key: string) => key, locale: ref("en-US") }) }));
+vi.mock("@/i18n", () => ({ default: { install: () => undefined } }));
+vi.mock("@/composables/useSqlHighlighter", () => ({ useSqlHighlighter: () => ({ highlight: (sql: string) => sql }) }));
+vi.mock("@/composables/useToast", () => ({ useToast: () => ({ toast: mocks.toast }) }));
+vi.mock("vue-virtual-scroller", () => ({
+  RecycleScroller: defineComponent({
+    props: { items: { type: Array, default: () => [] } },
+    setup(props, { slots }) {
+      return () =>
+        h(
+          "div",
+          props.items.map((item) => slots.default?.({ item })),
+        );
+    },
+  }),
+}));
+vi.mock("@/components/ui/searchable-select", () => ({ SearchableSelect: { render: () => null } }));
+vi.mock("@/components/ui/ToolbarOverflowMenu.vue", () => ({ default: { render: () => null } }));
+vi.mock("@/components/ui/CustomContextMenu.vue", () => ({
+  default: defineComponent({
+    setup(_, { slots }) {
+      return () => slots.default?.({ onContextMenu: () => undefined, isOpen: false });
+    },
+  }),
+}));
+vi.mock("@/components/editor/QueryEditor.vue", () => ({ default: { render: () => null } }));
+vi.mock("@/components/editor/DangerConfirmDialog.vue", () => ({ default: { render: () => null } }));
+vi.mock("@/components/objects/ProcedureExecutionDialog.vue", () => ({ default: { render: () => null } }));
+vi.mock("@/components/objects/CustomTypeInfoPanel.vue", () => ({ default: { render: () => null } }));
+vi.mock("@/components/export/XlsxHeaderDialog.vue", () => ({ default: { render: () => null } }));
+
+const connection = {
+  id: "mysql-routines",
+  name: "MySQL",
+  db_type: "mysql",
+  database: "app",
+  driver_profile: null,
+  url_params: null,
+  transport_layers: [],
+} as unknown as ConnectionConfig;
+
+// ObjectBrowser.vue's SINGLE_CLICK_DELAY; the deferral is what lets a second
+// click cancel the side panel before it loads.
+const SINGLE_CLICK_DELAY = 250;
+const mountedApps: Array<{ app: App; host: HTMLElement }> = [];
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  mocks.listObjects.mockResolvedValue([
+    { name: "sp_daily_report", schema: "app", object_type: "PROCEDURE", signature: "IN day DATE" },
+    { name: "fn_total", schema: "app", object_type: "FUNCTION", signature: "" },
+    { name: "seq_invoice", schema: "app", object_type: "SEQUENCE" },
+  ]);
+  mocks.listSchemas.mockResolvedValue([]);
+  mocks.getObjectSource.mockResolvedValue({ source: "CREATE PROCEDURE sp_daily_report() BEGIN END", editable: true });
+  mocks.buildEditableObjectSource.mockImplementation(async (options: { source: string }) => options.source);
+  mocks.ensureConnected.mockResolvedValue(undefined);
+  mocks.openObjectSourceTabPending.mockReturnValue("tab-1");
+  invalidateObjectBrowserRowsCache({});
+});
+
+afterEach(() => {
+  vi.useRealTimers();
+  for (const { app, host } of mountedApps.splice(0)) {
+    app.unmount();
+    host.remove();
+  }
+  invalidateObjectBrowserRowsCache({});
+});
+
+async function mountBrowser() {
+  const host = document.createElement("div");
+  document.body.append(host);
+  const app = createApp({ setup: () => () => h(ObjectBrowser, { connection, database: "app" }) });
+  mountedApps.push({ app, host });
+  app.mount(host);
+  await vi.waitFor(() => expect(host.textContent).toContain("sp_daily_report"));
+  return host;
+}
+
+function rowFor(host: HTMLElement, name: string): HTMLElement {
+  const row = [...host.querySelectorAll<HTMLElement>(".grid.h-\\[34px\\]")].find((element) => element.textContent?.includes(name));
+  expect(row, name).toBeDefined();
+  return row!;
+}
+
+function click(row: HTMLElement, detail: number) {
+  row.dispatchEvent(new MouseEvent("click", { bubbles: true, detail }));
+}
+
+describe("ObjectBrowser routine double click", () => {
+  it("opens an editable source tab for a double-clicked PROCEDURE", async () => {
+    const host = await mountBrowser();
+    vi.useFakeTimers();
+    const row = rowFor(host, "sp_daily_report");
+
+    click(row, 1);
+    click(row, 2);
+
+    expect(mocks.openObjectSourceTabPending).toHaveBeenCalledTimes(1);
+    expect(mocks.openObjectSourceTabPending).toHaveBeenCalledWith({
+      connectionId: "mysql-routines",
+      database: "app",
+      title: "Source - sp_daily_report(IN day DATE)",
+      schema: "app",
+      catalog: undefined,
+      initialEditing: true,
+      request: { name: "sp_daily_report", objectType: "PROCEDURE", signature: "IN day DATE" },
+    });
+    // The second click cancelled the pending single click, so the side panel
+    // never fetched the source.
+    await vi.advanceTimersByTimeAsync(SINGLE_CLICK_DELAY * 2);
+    expect(mocks.getObjectSource).not.toHaveBeenCalled();
+  });
+
+  it("opens an editable source tab for a double-clicked FUNCTION", async () => {
+    const host = await mountBrowser();
+    vi.useFakeTimers();
+    const row = rowFor(host, "fn_total");
+
+    click(row, 1);
+    click(row, 2);
+
+    expect(mocks.openObjectSourceTabPending).toHaveBeenCalledWith(expect.objectContaining({ initialEditing: true, request: { name: "fn_total", objectType: "FUNCTION", signature: "" } }));
+    await vi.advanceTimersByTimeAsync(SINGLE_CLICK_DELAY * 2);
+    expect(mocks.getObjectSource).not.toHaveBeenCalled();
+  });
+
+  it("keeps a single click on the source side panel", async () => {
+    const host = await mountBrowser();
+    vi.useFakeTimers();
+
+    click(rowFor(host, "sp_daily_report"), 1);
+
+    // Deferred: nothing happens until the double-click window closes.
+    expect(mocks.getObjectSource).not.toHaveBeenCalled();
+    await vi.advanceTimersByTimeAsync(SINGLE_CLICK_DELAY);
+    expect(mocks.getObjectSource).toHaveBeenCalledWith("mysql-routines", "app", "app", "sp_daily_report", "PROCEDURE", "IN day DATE");
+    expect(mocks.openObjectSourceTabPending).not.toHaveBeenCalled();
+  });
+
+  it("leaves non-routine source rows on the side panel when double clicked", async () => {
+    const host = await mountBrowser();
+    vi.useFakeTimers();
+    const row = rowFor(host, "seq_invoice");
+
+    click(row, 1);
+    click(row, 2);
+    await vi.advanceTimersByTimeAsync(SINGLE_CLICK_DELAY * 2);
+
+    expect(mocks.openObjectSourceTabPending).not.toHaveBeenCalled();
+    expect(mocks.getObjectSource).toHaveBeenCalledWith("mysql-routines", "app", "app", "seq_invoice", "SEQUENCE", undefined);
+  });
+});
diff --git a/apps/desktop/src/lib/__tests__/table/objectBrowserRowAction.spec.ts b/apps/desktop/src/lib/__tests__/table/objectBrowserRowAction.spec.ts
index bd88ba3fcd..306bee4ee9 100644
--- a/apps/desktop/src/lib/__tests__/table/objectBrowserRowAction.spec.ts
+++ b/apps/desktop/src/lib/__tests__/table/objectBrowserRowAction.spec.ts
@@ -80,8 +80,27 @@ describe("doubleClickRowAction", () => {
     expect(doubleClickRowAction(row(type, "v_orders"))).toBe("open-table");
   });
 
-  it("returns open-source for PROCEDURE", () => {
-    expect(doubleClickRowAction(row("PROCEDURE", "sp_run"))).toBe("open-source");
+  it.each(["PROCEDURE", "FUNCTION"] as const)("returns open-source-tab for %s (editable source tab, not the side panel)", (type) => {
+    expect(doubleClickRowAction(row(type, "sp_run"))).toBe("open-source-tab");
+  });
+
+  it("keeps routines on the source tab across database types", () => {
+    for (const dbType of ["mysql", "postgres", "oracle", "xugu"] as const) {
+      expect(doubleClickRowAction(row("PROCEDURE", "sp_run"), dbType), String(dbType)).toBe("open-source-tab");
+      expect(doubleClickRowAction(row("FUNCTION", "fn_run"), dbType), String(dbType)).toBe("open-source-tab");
+    }
+  });
+
+  it("leaves the other source-backed types on the side panel", () => {
+    expect(doubleClickRowAction(row("EVENT", "ev_nightly"))).toBe("open-source");
+    expect(doubleClickRowAction(row("SEQUENCE", "seq_test"))).toBe("open-source");
+    expect(doubleClickRowAction(row("PACKAGE", "pkg_test"))).toBe("open-source");
+    expect(doubleClickRowAction(row("PACKAGE_BODY", "pkg_body_test"))).toBe("open-source");
+    expect(doubleClickRowAction(row("TRIGGER", "trg_test"), "xugu")).toBe("open-source");
+    expect(doubleClickRowAction(row("TYPE", "app_status"), "xugu")).toBe("open-source");
+    expect(doubleClickRowAction(row("TYPE_BODY", "app_status"), "xugu")).toBe("open-source");
+    expect(doubleClickRowAction(row("VIEW", "v_users"))).toBe("open-table");
+    expect(doubleClickRowAction(row("MATERIALIZED_VIEW", "mv_users"))).toBe("open-table");
   });
 
   it("returns none for null/undefined", () => {
@@ -128,6 +147,12 @@ describe("resolveRowClickAction", () => {
       expect(result.action).toBe("open-table");
       expect(result.isDouble).toBe(true);
     });
+
+    it.each(["PROCEDURE", "FUNCTION"] as const)("single click on %s returns open-source, double click returns open-source-tab", (type) => {
+      const routineRow = row(type, "sp_run");
+      expect(resolveRowClickAction(routineRow, 1, "single")).toEqual({ action: "open-source", isDouble: false });
+      expect(resolveRowClickAction(routineRow, 2, "single")).toEqual({ action: "open-source-tab", isDouble: true });
+    });
   });
 
   describe("double-click activation mode", () => {
@@ -154,6 +179,12 @@ describe("resolveRowClickAction", () => {
       expect(result.action).toBe("open-table");
       expect(result.isDouble).toBe(true);
     });
+
+    it.each(["PROCEDURE", "FUNCTION"] as const)("single click on %s returns open-source, double click returns open-source-tab", (type) => {
+      const routineRow = row(type, "sp_run");
+      expect(resolveRowClickAction(routineRow, 1, "double")).toEqual({ action: "open-source", isDouble: false });
+      expect(resolveRowClickAction(routineRow, 2, "double")).toEqual({ action: "open-source-tab", isDouble: true });
+    });
   });
 });
 
@@ -169,8 +200,15 @@ describe("shouldDeferSingleClick", () => {
     expect(shouldDeferSingleClick(viewRow, "open-source")).toBe(true);
   });
 
-  it("does not defer PROCEDURE open-source (same single/double action)", () => {
-    expect(shouldDeferSingleClick(row("PROCEDURE", "sp_run"), "open-source")).toBe(false);
+  it.each(["PROCEDURE", "FUNCTION"] as const)("defers %s open-source so a second click can cancel the side panel", (type) => {
+    // single → open-source, double → open-source-tab: the 250ms deferral is what
+    // keeps a fast double click from also opening the side panel (issue #10202).
+    expect(shouldDeferSingleClick(row(type, "sp_run"), "open-source")).toBe(true);
+    expect(shouldDeferSingleClick(row(type, "sp_run"), "open-source-tab")).toBe(false);
+  });
+
+  it("does not defer SEQUENCE open-source (same single/double action)", () => {
+    expect(shouldDeferSingleClick(row("SEQUENCE", "seq_run"), "open-source")).toBe(false);
   });
 
   it("does not defer none action", () => {
diff --git a/apps/desktop/src/lib/table/objectBrowserRowAction.ts b/apps/desktop/src/lib/table/objectBrowserRowAction.ts
index fc5468f799..4a2561dada 100644
--- a/apps/desktop/src/lib/table/objectBrowserRowAction.ts
+++ b/apps/desktop/src/lib/table/objectBrowserRowAction.ts
@@ -2,7 +2,7 @@ import type { DatabaseType } from "@/types/database";
 import { customTypeCapabilities, supportsTypeObjectSource } from "@/lib/database/databaseObjectCapabilities";
 import type { ObjectBrowserRow } from "@/lib/table/objectBrowserRows";
 
-export type ObjectBrowserRowAction = "table-info" | "type-info" | "open-table" | "open-source" | "none";
+export type ObjectBrowserRowAction = "table-info" | "type-info" | "open-table" | "open-source" | "open-source-tab" | "none";
 
 /**
  * Determine the action for a single click on an object browser row.
@@ -28,7 +28,8 @@ export function singleClickRowAction(row: ObjectBrowserRow | null | undefined, d
  * Determine the action for a double click on an object browser row.
  * - TABLE/VIEW/MATERIALIZED_VIEW → open-table (open data tab, matching the
  *   sidebar's data-node double-click behavior)
- * - PROCEDURE/FUNCTION/TRIGGER/SEQUENCE/PACKAGE/PACKAGE_BODY/TYPE/TYPE_BODY → open-source
+ * - PROCEDURE/FUNCTION → open-source-tab (editable source tab; single click keeps the side panel)
+ * - TRIGGER/SEQUENCE/PACKAGE/PACKAGE_BODY/TYPE/TYPE_BODY → open-source
  * - otherwise → none
  */
 export function doubleClickRowAction(row: ObjectBrowserRow | null | undefined, dbType?: DatabaseType): ObjectBrowserRowAction {
@@ -37,6 +38,10 @@ export function doubleClickRowAction(row: ObjectBrowserRow | null | undefined, d
   if (row.type === "TABLE" || row.type === "VIEW" || row.type === "MATERIALIZED_VIEW") return "open-table";
   if (row.type === "EVENT") return "open-source";
   if (row.type === "TYPE" && customTypeCapabilities(dbType).details) return "type-info";
+  // Routines are the only source-backed rows with a dedicated double-click
+  // gesture (issue #10202): single click keeps the side panel, double click
+  // hands the object to the source tab. canOpenSource always accepts them.
+  if (row.type === "PROCEDURE" || row.type === "FUNCTION") return "open-source-tab";
   if (canOpenSource(row, dbType)) return "open-source";
   return "none";
 }
@@ -47,7 +52,8 @@ export function doubleClickRowAction(row: ObjectBrowserRow | null | undefined, d
  *
  * In both single-click and double-click activation modes, a single click
  * triggers the side-panel action (table-info / open-source). When a distinct
- * double-click action exists (e.g. TABLE single→table-info, double→open-table),
+ * double-click action exists (e.g. TABLE single→table-info, double→open-table;
+ * PROCEDURE single→open-source, double→open-source-tab),
  * the caller defers the single-click via shouldDeferSingleClick so the second
  * click can cancel it.
  */
@@ -65,8 +71,9 @@ export function resolveRowClickAction(row: ObjectBrowserRow | null | undefined,
  * Whether a single-click action should be deferred to distinguish it from a
  * possible upcoming double-click. Applies when the row's single-click and
  * double-click actions differ (e.g. TABLE: single → table-info, double →
- * open-table). For rows whose single and double actions are identical
- * (e.g. VIEW → open-source both), no deferral is needed.
+ * open-table; PROCEDURE/FUNCTION: single → open-source, double →
+ * open-source-tab). For rows whose single and double actions are identical
+ * (e.g. SEQUENCE → open-source both), no deferral is needed.
  */
 export function shouldDeferSingleClick(row: ObjectBrowserRow | null | undefined, action: ObjectBrowserRowAction, dbType?: DatabaseType): boolean {
   if (action === "none") return false;