diff --git a/apps/desktop/src/App.vue b/apps/desktop/src/App.vue
index a4acc4e58..bd013e582 100644
--- a/apps/desktop/src/App.vue
+++ b/apps/desktop/src/App.vue
@@ -72,6 +72,7 @@ import {
 import { isPreviewTab } from "@/lib/tabs/tabPresentation";
 import { supportsSqlFileExecution } from "@/lib/database/databaseCapabilities";
 import { classifyAiSqlExecution } from "@/lib/ai/aiSqlExecutionPolicy";
+import { buildAppendedEditorSql } from "@/lib/ai/aiSqlAppend";
 import { buildHistoryAiAnalysisPrompt } from "@/lib/history/historyAiAnalysis";
 import { countAvailableAgentDriverUpdates, type AgentDriverUpdateBadgeState } from "@/lib/connection/agentDriverUpdateBadge";
 import { safeLocalStorageGet, safeLocalStorageSet } from "@/lib/backend/safeStorage";
@@ -1250,16 +1251,25 @@ function onAiReplaceSql(sql: string) {
   queryStore.updateSql(tabId, sql);
 }
 
-function onAiExecuteSql(sql: string) {
-  const tabId = ensureQueryTab();
-  queryStore.updateSql(tabId, sql);
+function runAiGeneratedSql(sql: string) {
   selectedSql.value = "";
   nextTick(() => tryExecute(sql));
 }
 
+function onAiExecuteSql(sql: string) {
+  const tabId = ensureQueryTab();
+  queryStore.updateSql(tabId, buildAppendedEditorSql(activeTab.value?.sql || "", sql));
+  runAiGeneratedSql(sql);
+}
+
+function onAiTempRunSql(sql: string) {
+  ensureQueryTab();
+  runAiGeneratedSql(sql);
+}
+
 function onAiRequestAutoExecuteSql(sql: string) {
   const tabId = ensureQueryTab();
-  queryStore.updateSql(tabId, sql);
+  queryStore.updateSql(tabId, buildAppendedEditorSql(activeTab.value?.sql || "", sql));
   selectedSql.value = "";
 
   const decision = classifyAiSqlExecution(sql, activeConnection.value);
@@ -1281,7 +1291,7 @@ function onAiRequestAutoExecuteSql(sql: string) {
 
 function onAiOpenExplainPlan(sql: string) {
   const tabId = ensureQueryTab();
-  queryStore.updateSql(tabId, sql);
+  queryStore.updateSql(tabId, buildAppendedEditorSql(activeTab.value?.sql || "", sql));
   selectedSql.value = "";
   nextTick(() => {
     void tryExplain(sql);
@@ -1952,7 +1962,18 @@ onUnmounted(() => {
           <div v-if="showAiPanel" :class="isClassicLayout ? 'h-full shrink-0 relative z-30 isolate bg-background' : 'h-full shrink-0 relative z-30 isolate rounded-md border border-border/80 bg-background'" :style="{ width: aiPanelWidth + 'px' }">
             <div class="panel-resize-handle panel-resize-handle--left" @mousedown="startAiPanelResize" />
             <div class="h-full min-h-0 overflow-hidden">
-              <AiAssistant v-if="aiPanelReady" ref="aiAssistantRef" :tab="activeTab" :connection="activeConnection" @replace-sql="onAiReplaceSql" @execute-sql="onAiExecuteSql" @request-auto-execute-sql="onAiRequestAutoExecuteSql" @open-explain-plan="onAiOpenExplainPlan" @close="toggleAiPanel" />
+              <AiAssistant
+                v-if="aiPanelReady"
+                ref="aiAssistantRef"
+                :tab="activeTab"
+                :connection="activeConnection"
+                @replace-sql="onAiReplaceSql"
+                @execute-sql="onAiExecuteSql"
+                @temp-run-sql="onAiTempRunSql"
+                @request-auto-execute-sql="onAiRequestAutoExecuteSql"
+                @open-explain-plan="onAiOpenExplainPlan"
+                @close="toggleAiPanel"
+              />
             </div>
           </div>
 
diff --git a/apps/desktop/src/components/editor/AiAssistant.vue b/apps/desktop/src/components/editor/AiAssistant.vue
index 398698bfc..45c60b146 100644
--- a/apps/desktop/src/components/editor/AiAssistant.vue
+++ b/apps/desktop/src/components/editor/AiAssistant.vue
@@ -15,6 +15,7 @@ import {
   Copy,
   Database,
   FileCode,
+  FlaskConical,
   GitBranch,
   HelpCircle,
   History,
@@ -123,6 +124,7 @@ const props = defineProps<{
 const emit = defineEmits<{
   replaceSql: [sql: string];
   executeSql: [sql: string];
+  tempRunSql: [sql: string];
   requestAutoExecuteSql: [sql: string];
   openExplainPlan: [sql: string];
   close: [];
@@ -1516,10 +1518,13 @@ function applySql(code: string) {
 }
 
 function executeSql(code: string) {
-  emit("replaceSql", code);
   emit("executeSql", code);
 }
 
+function tempRunSql(code: string) {
+  emit("tempRunSql", code);
+}
+
 const copiedIndex = ref("");
 
 async function copyCode(code: string, key: string) {
@@ -1891,6 +1896,9 @@ async function openExternalUrl(url: string) {
                       <span>{{ seg.lang }}</span>
                       <span class="flex-1" />
                       <div class="flex items-center gap-1.5">
+                        <button v-if="seg.isSql" class="rounded p-0.5 text-zinc-500 hover:bg-zinc-200 hover:text-zinc-900 dark:text-zinc-400 dark:hover:bg-zinc-700 dark:hover:text-zinc-200" :title="t('ai.tempRunSql')" @click="tempRunSql(seg.content)">
+                          <FlaskConical class="h-3.5 w-3.5" />
+                        </button>
                         <button v-if="seg.isSql" class="rounded p-0.5 text-zinc-500 hover:bg-zinc-200 hover:text-zinc-900 dark:text-zinc-400 dark:hover:bg-zinc-700 dark:hover:text-zinc-200" :title="t('ai.executeSql')" @click="executeSql(seg.content)">
                           <Play class="h-3.5 w-3.5" />
                         </button>
diff --git a/apps/desktop/src/i18n/locales/en.ts b/apps/desktop/src/i18n/locales/en.ts
index 55b3b5a70..0c7dcbe3f 100644
--- a/apps/desktop/src/i18n/locales/en.ts
+++ b/apps/desktop/src/i18n/locales/en.ts
@@ -1234,6 +1234,7 @@ export default {
     copySql: "Copy SQL",
     copyCode: "Copy Code",
     executeSql: "Execute SQL",
+    tempRunSql: "Run without modifying editor",
     copyAll: "Copy All",
     copied: "Copied",
     copyTestResult: "Copy test result",
diff --git a/apps/desktop/src/i18n/locales/es.ts b/apps/desktop/src/i18n/locales/es.ts
index ae3bb6b88..a672c9f53 100644
--- a/apps/desktop/src/i18n/locales/es.ts
+++ b/apps/desktop/src/i18n/locales/es.ts
@@ -1196,6 +1196,7 @@ export default withEnglishFallback({
     copySql: "Copiar SQL",
     copyCode: "Copiar código",
     executeSql: "Ejecutar SQL",
+    tempRunSql: "Ejecutar sin modificar",
     copyAll: "Copiar todo",
     copied: "Copiado",
     copyTestResult: "Copiar resultado de prueba",
diff --git a/apps/desktop/src/i18n/locales/it.ts b/apps/desktop/src/i18n/locales/it.ts
index e26f83b2a..9763bf219 100644
--- a/apps/desktop/src/i18n/locales/it.ts
+++ b/apps/desktop/src/i18n/locales/it.ts
@@ -1177,6 +1177,7 @@ export default withEnglishFallback({
     copySql: "Copia SQL",
     copyCode: "Copia Codice",
     executeSql: "Esegui SQL",
+    tempRunSql: "Esegui senza modificare",
     copyAll: "Copia Tutto",
     copied: "Copiato",
     copyTestResult: "Copia risultato test",
diff --git a/apps/desktop/src/i18n/locales/ja.ts b/apps/desktop/src/i18n/locales/ja.ts
index 1a9de2f61..0a65e1060 100644
--- a/apps/desktop/src/i18n/locales/ja.ts
+++ b/apps/desktop/src/i18n/locales/ja.ts
@@ -1199,6 +1199,7 @@ export default withEnglishFallback({
     copySql: "SQLをコピー",
     copyCode: "コードをコピー",
     executeSql: "SQLを実行",
+    tempRunSql: "編集せずに実行",
     copyAll: "すべてコピー",
     copied: "コピーしました",
     copyTestResult: "テスト結果をコピー",
diff --git a/apps/desktop/src/i18n/locales/pt-BR.ts b/apps/desktop/src/i18n/locales/pt-BR.ts
index 313743b0c..5b912fc1f 100644
--- a/apps/desktop/src/i18n/locales/pt-BR.ts
+++ b/apps/desktop/src/i18n/locales/pt-BR.ts
@@ -1197,6 +1197,7 @@ export default withEnglishFallback({
     copySql: "Copiar SQL",
     copyCode: "Copiar Código",
     executeSql: "Executar SQL",
+    tempRunSql: "Executar sem modificar",
     copyAll: "Copiar Tudo",
     copied: "Copiado",
     copyTestResult: "Copiar resultado do teste",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.ts b/apps/desktop/src/i18n/locales/zh-CN.ts
index bf212257a..e9289e7a2 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.ts
+++ b/apps/desktop/src/i18n/locales/zh-CN.ts
@@ -1235,6 +1235,7 @@ export default withEnglishFallback({
     copySql: "复制 SQL",
     copyCode: "复制代码",
     executeSql: "立即执行",
+    tempRunSql: "临时运行",
     copyAll: "复制全部",
     copied: "已复制",
     copyTestResult: "复制测试结果",
diff --git a/apps/desktop/src/i18n/locales/zh-TW.ts b/apps/desktop/src/i18n/locales/zh-TW.ts
index ef084e956..b4e2b4192 100644
--- a/apps/desktop/src/i18n/locales/zh-TW.ts
+++ b/apps/desktop/src/i18n/locales/zh-TW.ts
@@ -1177,6 +1177,7 @@ export default withEnglishFallback({
     copySql: "複製 SQL",
     copyCode: "複製程式碼",
     executeSql: "立即執行",
+    tempRunSql: "臨時執行",
     copyAll: "複製全部",
     copied: "已複製",
     copyTestResult: "複製測試結果",
diff --git a/apps/desktop/src/lib/ai/aiSqlAppend.ts b/apps/desktop/src/lib/ai/aiSqlAppend.ts
new file mode 100644
index 000000000..11e01ce95
--- /dev/null
+++ b/apps/desktop/src/lib/ai/aiSqlAppend.ts
@@ -0,0 +1,19 @@
+/**
+ * Build the editor content after appending AI-generated SQL to existing editor SQL.
+ * Preserves the existing editor content exactly and adds only the newline separator
+ * needed to leave a blank line before the appended SQL.
+ */
+export function buildAppendedEditorSql(currentEditorSql: string, newSql: string): string {
+  if (!currentEditorSql) return newSql;
+
+  let separator = "\n\n";
+  if (currentEditorSql.endsWith("\r\n\r\n") || currentEditorSql.endsWith("\n\n")) {
+    separator = "";
+  } else if (currentEditorSql.endsWith("\r\n")) {
+    separator = "\r\n";
+  } else if (currentEditorSql.endsWith("\n")) {
+    separator = "\n";
+  }
+
+  return `${currentEditorSql}${separator}${newSql}`;
+}
diff --git a/packages/app-tests/aiSqlAppend.test.ts b/packages/app-tests/aiSqlAppend.test.ts
new file mode 100644
index 000000000..fd6130d24
--- /dev/null
+++ b/packages/app-tests/aiSqlAppend.test.ts
@@ -0,0 +1,35 @@
+import { strict as assert } from "node:assert";
+import { test } from "vitest";
+import { buildAppendedEditorSql } from "../../apps/desktop/src/lib/ai/aiSqlAppend.ts";
+
+test("buildAppendedEditorSql returns newSql unchanged when editor is empty", () => {
+  assert.equal(buildAppendedEditorSql("", "SELECT 1"), "SELECT 1");
+});
+
+test("buildAppendedEditorSql prepends blank-line separator when editor has content", () => {
+  assert.equal(buildAppendedEditorSql("SELECT 1", "SELECT 2"), "SELECT 1\n\nSELECT 2");
+});
+
+test("buildAppendedEditorSql preserves multiline existing content", () => {
+  assert.equal(buildAppendedEditorSql("SELECT *\nFROM users", "SELECT *\nFROM orders"), "SELECT *\nFROM users\n\nSELECT *\nFROM orders");
+});
+
+test("buildAppendedEditorSql preserves trailing newlines already present in the editor", () => {
+  assert.equal(buildAppendedEditorSql("SELECT 1\n\n\n", "SELECT 2"), "SELECT 1\n\n\nSELECT 2");
+});
+
+test("buildAppendedEditorSql preserves trailing spaces", () => {
+  assert.equal(buildAppendedEditorSql("SELECT 1   ", "SELECT 2"), "SELECT 1   \n\nSELECT 2");
+});
+
+test("buildAppendedEditorSql preserves trailing tabs", () => {
+  assert.equal(buildAppendedEditorSql("SELECT 1\t\t", "SELECT 2"), "SELECT 1\t\t\n\nSELECT 2");
+});
+
+test("buildAppendedEditorSql preserves whitespace-only editor content", () => {
+  assert.equal(buildAppendedEditorSql(" \t ", "SELECT 2"), " \t \n\nSELECT 2");
+});
+
+test("buildAppendedEditorSql preserves unfinished SQL", () => {
+  assert.equal(buildAppendedEditorSql("SELECT * FROM", "SELECT * FROM users"), "SELECT * FROM\n\nSELECT * FROM users");
+});