diff --git a/apps/desktop/src/stores/queryStore.ts b/apps/desktop/src/stores/queryStore.ts
index c808f66120..d747d8f7a9 100644
--- a/apps/desktop/src/stores/queryStore.ts
+++ b/apps/desktop/src/stores/queryStore.ts
@@ -1988,7 +1988,9 @@ export const useQueryStore = defineStore("query", () => {
         executionPromise = api.executeInManualTransaction(tab.txnSessionId, sqlToExecute, tab.database, executionSchema, pageLimit);
       } else {
         console.info("[DBX][executeTabSql:execute-multi:start]", { traceId, elapsed: elapsed() });
-        const clientSessionId = tab.mode === "query" || tab.mode === "data" ? tabClientSessionId(tab) : undefined;
+        // Data tabs should reuse the already-open pool; session pools are reserved
+        // for query tabs/background tasks that need connection-local state isolation.
+        const clientSessionId = tab.mode === "query" ? tabClientSessionId(tab) : undefined;
         const executionOptions = {
           ...(typeof pageLimit === "number"
             ? useAgentResultSession
diff --git a/packages/app-tests/queryStore.test.ts b/packages/app-tests/queryStore.test.ts
index 8df5a5b10e..266298f5d1 100644
--- a/packages/app-tests/queryStore.test.ts
+++ b/packages/app-tests/queryStore.test.ts
@@ -2628,7 +2628,7 @@ test("query execution is scoped to the tab client session", async () => {
   }
 });
 
-test("data tab execution is scoped to the tab client session", async () => {
+test("data tab execution reuses the shared connection pool", async () => {
   const restoreStorage = installMemoryStorage();
   setActivePinia(createPinia());
   const connectionStore = useConnectionStore();
@@ -2654,7 +2654,7 @@ test("data tab execution is scoped to the tab client session", async () => {
   try {
     await store.executeTabSql(tabId, "select * from users");
 
-    assert.equal(executeBody.clientSessionId, tabId);
+    assert.equal(executeBody.clientSessionId, undefined);
     assert.equal(executeBody.timeoutSecs, 30);
   } finally {
     globalThis.fetch = originalFetch;
diff --git a/packages/app-tests/useDataGridActions.test.ts b/packages/app-tests/useDataGridActions.test.ts
index f455631955..56f91143f9 100644
--- a/packages/app-tests/useDataGridActions.test.ts
+++ b/packages/app-tests/useDataGridActions.test.ts
@@ -98,7 +98,7 @@ test("data reload executes before slow metadata refresh completes", async () =>
     const reload = actions.onReloadData(undefined, undefined, undefined, undefined, 50, 0);
 
     await waitFor(() => !!executeBody);
-    assert.equal(executeBody.clientSessionId, tabId);
+    assert.equal(executeBody.clientSessionId, undefined);
     assert.deepEqual(tab.result?.rows, [[1]]);
 
     await waitFor(() => typeof resolveColumns === "function");