From c892c8d1b09aad0450c57b3339ce40eb48f163da Mon Sep 17 00:00:00 2001
From: t8y2 <1156263951@qq.com>
Date: Fri, 14 Aug 2026 00:41:17 +0000
Subject: [PATCH] feat(mysql): support changing user account host

Closes #4677
---
 .../components/admin/DatabaseUserAdmin.vue    |  48 +++++-
 .../__tests__/userAdminHostMessages.spec.ts   |  24 +++
 apps/desktop/src/i18n/locales/en.ts           |   2 +
 apps/desktop/src/i18n/locales/es.ts           |   2 +
 apps/desktop/src/i18n/locales/it.ts           |   2 +
 apps/desktop/src/i18n/locales/ja.ts           |   2 +
 apps/desktop/src/i18n/locales/ko.ts           |   2 +
 apps/desktop/src/i18n/locales/pt-BR.ts        |   2 +
 apps/desktop/src/i18n/locales/zh-CN.ts        |   2 +
 apps/desktop/src/i18n/locales/zh-TW.ts        |   2 +
 .../DatabaseUserAdmin.component.spec.ts       | 154 +++++++++++++++++-
 .../database/databaseUserAdmin.spec.ts        |  30 ++++
 .../src/lib/database/databaseUserAdmin.ts     |  13 ++
 13 files changed, 279 insertions(+), 6 deletions(-)
 create mode 100644 apps/desktop/src/i18n/__tests__/userAdminHostMessages.spec.ts

diff --git a/apps/desktop/src/components/admin/DatabaseUserAdmin.vue b/apps/desktop/src/components/admin/DatabaseUserAdmin.vue
index 4d99f19198..e9b08115ad 100644
--- a/apps/desktop/src/components/admin/DatabaseUserAdmin.vue
+++ b/apps/desktop/src/components/admin/DatabaseUserAdmin.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { computed, onMounted, ref, watch } from "vue";
 import { useI18n } from "vue-i18n";
-import { AlertTriangle, Check, KeyRound, Lock, Loader2, Plus, RefreshCcw, Search, ShieldCheck, Trash2, Unlock, UserRound } from "@lucide/vue";
+import { AlertTriangle, Check, Globe2, KeyRound, Lock, Loader2, Plus, RefreshCcw, Search, ShieldCheck, Trash2, Unlock, UserRound } from "@lucide/vue";
 import { Button } from "@/components/ui/button";
 import { Badge } from "@/components/ui/badge";
 import { Dialog, DialogContent, DialogFooter, DialogHeader, DialogTitle } from "@/components/ui/dialog";
@@ -51,6 +51,7 @@ const loadError = ref("");
 const grantError = ref("");
 
 const createDialogOpen = ref(false);
+const hostDialogOpen = ref(false);
 const passwordDialogOpen = ref(false);
 const sqlDialogOpen = ref(false);
 const pendingSql = ref("");
@@ -62,6 +63,7 @@ const pendingAfterApply = ref<(() => Promise<void>) | undefined>();
 const createUser = ref("app_user");
 const createHost = ref("%");
 const createPassword = ref("");
+const newHost = ref("");
 const newPassword = ref("");
 const privilegeDatabase = ref(props.connection.database || "*");
 const privilegeTable = ref("*");
@@ -81,6 +83,7 @@ const provider = computed(() => resolveDatabaseUserAdminProviderForConnection(pr
 const supported = computed(() => provider.value !== null);
 const isPostgres = computed(() => provider.value?.dialect === "postgres");
 const canCreateUser = computed(() => !!provider.value?.createUserSql);
+const canRenameUser = computed(() => !!provider.value?.renameUserSql);
 const canAlterPassword = computed(() => !!provider.value?.alterPasswordSql);
 const canAlterLogin = computed(() => !!provider.value?.alterLoginSql);
 const canDropUser = computed(() => !!provider.value?.dropUserSql);
@@ -114,6 +117,10 @@ const filteredCreateDatabases = computed(() => {
 const selectedCreateDatabaseSet = computed(() => new Set(createDatabaseAuthorizations.value.map((selection) => selection.database)));
 const createDatabaseAuthorizationsValid = computed(() => createDatabaseAuthorizations.value.every((selection) => selection.preset !== "custom" || (selection.privileges?.length ?? 0) > 0));
 const pendingStatus = computed(() => (pendingResults.value.length > 0 ? authorizationPlanStatus(pendingResults.value) : undefined));
+const canPreviewHostChange = computed(() => {
+  const host = newHost.value.trim();
+  return !!host && host !== selectedUser.value?.host;
+});
 
 function syncPrivilegeSelectionFromGrants() {
   const selectionFromGrants = provider.value?.privilegeSelectionFromGrants;
@@ -205,6 +212,13 @@ function selectUser(user: DatabaseUserIdentity) {
   selectedUserKey.value = userKey(user);
 }
 
+function openHostDialog() {
+  const user = selectedUser.value;
+  if (!user || !provider.value?.renameUserSql) return;
+  newHost.value = user.host;
+  hostDialogOpen.value = true;
+}
+
 function togglePrivilege(privilege: string) {
   const set = new Set(selectedPrivileges.value);
   if (set.has(privilege)) set.delete(privilege);
@@ -396,6 +410,21 @@ function previewPasswordChange() {
   });
 }
 
+function previewHostChange() {
+  const user = selectedUser.value;
+  const renameUserSql = provider.value?.renameUserSql;
+  const host = newHost.value.trim();
+  if (!user || !renameUserSql || !host || host === user.host) return;
+  previewSql(renameUserSql(user, host), {
+    danger: true,
+    afterApply: async () => {
+      hostDialogOpen.value = false;
+      newHost.value = "";
+      selectedUserKey.value = userKey({ ...user, host });
+    },
+  });
+}
+
 function previewDropUser() {
   const user = selectedUser.value;
   const userProvider = provider.value;
@@ -586,6 +615,10 @@ onMounted(loadUsers);
             </Badge>
           </div>
           <div class="ml-auto flex items-center gap-1.5">
+            <Button v-if="canRenameUser" variant="outline" size="sm" class="h-7 gap-1.5 px-2 text-xs" @click="openHostDialog">
+              <Globe2 class="h-3.5 w-3.5" />
+              {{ t("userAdmin.changeHost") }}
+            </Button>
             <Button v-if="canAlterPassword" variant="outline" size="sm" class="h-7 gap-1.5 px-2 text-xs" @click="passwordDialogOpen = true">
               <KeyRound class="h-3.5 w-3.5" />
               {{ t("userAdmin.changePassword") }}
@@ -807,6 +840,19 @@ onMounted(loadUsers);
       </DialogContent>
     </Dialog>
 
+    <Dialog v-model:open="hostDialogOpen">
+      <DialogContent class="max-w-sm">
+        <DialogHeader>
+          <DialogTitle>{{ t("userAdmin.changeHost") }}</DialogTitle>
+        </DialogHeader>
+        <Input v-model="newHost" :placeholder="t('userAdmin.newHost')" />
+        <DialogFooter>
+          <Button variant="outline" @click="hostDialogOpen = false">{{ t("dangerDialog.cancel") }}</Button>
+          <Button :disabled="!canPreviewHostChange" @click="previewHostChange">{{ t("userAdmin.previewSql") }}</Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+
     <Dialog v-model:open="sqlDialogOpen">
       <DialogContent class="max-w-2xl">
         <DialogHeader>
diff --git a/apps/desktop/src/i18n/__tests__/userAdminHostMessages.spec.ts b/apps/desktop/src/i18n/__tests__/userAdminHostMessages.spec.ts
new file mode 100644
index 0000000000..f17ccdd130
--- /dev/null
+++ b/apps/desktop/src/i18n/__tests__/userAdminHostMessages.spec.ts
@@ -0,0 +1,24 @@
+import { describe, expect, it } from "vitest";
+import en from "@/i18n/locales/en";
+import es from "@/i18n/locales/es";
+import itLocale from "@/i18n/locales/it";
+import ja from "@/i18n/locales/ja";
+import ko from "@/i18n/locales/ko";
+import ptBR from "@/i18n/locales/pt-BR";
+import zhCN from "@/i18n/locales/zh-CN";
+import zhTW from "@/i18n/locales/zh-TW";
+
+describe("user administration Host translations", () => {
+  it("provides the Host-change labels in English", () => {
+    expect(en.userAdmin.changeHost).toEqual(expect.any(String));
+    expect(en.userAdmin.newHost).toEqual(expect.any(String));
+  });
+
+  it("provides localized Host-change labels in every non-English locale", () => {
+    const locales = { es, it: itLocale, ja, ko, "pt-BR": ptBR, "zh-CN": zhCN, "zh-TW": zhTW };
+    for (const [locale, messages] of Object.entries(locales)) {
+      expect(messages.userAdmin.changeHost, locale).not.toBe(en.userAdmin.changeHost);
+      expect(messages.userAdmin.newHost, locale).not.toBe(en.userAdmin.newHost);
+    }
+  });
+});
diff --git a/apps/desktop/src/i18n/locales/en.ts b/apps/desktop/src/i18n/locales/en.ts
index 73061da7b6..f28dd8c55e 100644
--- a/apps/desktop/src/i18n/locales/en.ts
+++ b/apps/desktop/src/i18n/locales/en.ts
@@ -3066,6 +3066,8 @@ export default {
     username: "Username",
     host: "Host",
     addHost: "Add Host",
+    changeHost: "Change Host",
+    newHost: "New Host",
     changePassword: "Change Password",
     newPassword: "New password",
     lock: "Lock",
diff --git a/apps/desktop/src/i18n/locales/es.ts b/apps/desktop/src/i18n/locales/es.ts
index 215bd01c47..68bcc3f70b 100644
--- a/apps/desktop/src/i18n/locales/es.ts
+++ b/apps/desktop/src/i18n/locales/es.ts
@@ -2910,6 +2910,8 @@ export default withEnglishFallback({
     revoke: "Revocar",
     username: "Nombre de usuario",
     host: "Host",
+    changeHost: "Cambiar host",
+    newHost: "Nuevo host",
     changePassword: "Cambiar contraseña",
     newPassword: "Nueva contraseña",
     lock: "Bloquear",
diff --git a/apps/desktop/src/i18n/locales/it.ts b/apps/desktop/src/i18n/locales/it.ts
index 2199fc9a84..3b7e5bfba7 100644
--- a/apps/desktop/src/i18n/locales/it.ts
+++ b/apps/desktop/src/i18n/locales/it.ts
@@ -2908,6 +2908,8 @@ export default withEnglishFallback({
     revoke: "Revoca",
     username: "Nome utente",
     host: "Host",
+    changeHost: "Modifica host",
+    newHost: "Nuovo host",
     changePassword: "Cambia Password",
     newPassword: "Nuova password",
     lock: "Blocca",
diff --git a/apps/desktop/src/i18n/locales/ja.ts b/apps/desktop/src/i18n/locales/ja.ts
index a7ec64ab14..2ad1e98337 100644
--- a/apps/desktop/src/i18n/locales/ja.ts
+++ b/apps/desktop/src/i18n/locales/ja.ts
@@ -2971,6 +2971,8 @@ export default withEnglishFallback({
     revoke: "取り消し",
     username: "ユーザー名",
     host: "ホスト",
+    changeHost: "ホストを変更",
+    newHost: "新しいホスト",
     changePassword: "パスワードを変更",
     newPassword: "新しいパスワード",
     lock: "ロック",
diff --git a/apps/desktop/src/i18n/locales/ko.ts b/apps/desktop/src/i18n/locales/ko.ts
index 4d0a696f70..480778d921 100644
--- a/apps/desktop/src/i18n/locales/ko.ts
+++ b/apps/desktop/src/i18n/locales/ko.ts
@@ -2912,6 +2912,8 @@ export default withEnglishFallback({
     revoke: "권한 회수",
     username: "사용자 이름",
     host: "호스트",
+    changeHost: "호스트 변경",
+    newHost: "새 호스트",
     changePassword: "비밀번호 변경",
     newPassword: "새 비밀번호",
     lock: "잠금",
diff --git a/apps/desktop/src/i18n/locales/pt-BR.ts b/apps/desktop/src/i18n/locales/pt-BR.ts
index e9a5509c27..43a2c9f085 100644
--- a/apps/desktop/src/i18n/locales/pt-BR.ts
+++ b/apps/desktop/src/i18n/locales/pt-BR.ts
@@ -2910,6 +2910,8 @@ export default withEnglishFallback({
     revoke: "Revogar",
     username: "Nome de usuário",
     host: "Host",
+    changeHost: "Alterar host",
+    newHost: "Novo host",
     changePassword: "Alterar Senha",
     newPassword: "Nova senha",
     lock: "Bloquear",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.ts b/apps/desktop/src/i18n/locales/zh-CN.ts
index 51d819d6af..182a81ba19 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.ts
+++ b/apps/desktop/src/i18n/locales/zh-CN.ts
@@ -3055,6 +3055,8 @@ export default withEnglishFallback({
     revoke: "撤权",
     username: "用户名",
     host: "Host",
+    changeHost: "修改主机",
+    newHost: "新主机",
     changePassword: "修改密码",
     newPassword: "新密码",
     lock: "锁定",
diff --git a/apps/desktop/src/i18n/locales/zh-TW.ts b/apps/desktop/src/i18n/locales/zh-TW.ts
index e68e87f3f1..355bc7dc38 100644
--- a/apps/desktop/src/i18n/locales/zh-TW.ts
+++ b/apps/desktop/src/i18n/locales/zh-TW.ts
@@ -5837,6 +5837,8 @@ export default withEnglishFallback({
     revoke: "撤銷",
     username: "使用者名稱",
     host: "主機",
+    changeHost: "變更主機",
+    newHost: "新主機",
     changePassword: "變更密碼",
     newPassword: "新密碼",
     lock: "鎖定",
diff --git a/apps/desktop/src/lib/__tests__/database/DatabaseUserAdmin.component.spec.ts b/apps/desktop/src/lib/__tests__/database/DatabaseUserAdmin.component.spec.ts
index d97c4b81fc..f681bbf42e 100644
--- a/apps/desktop/src/lib/__tests__/database/DatabaseUserAdmin.component.spec.ts
+++ b/apps/desktop/src/lib/__tests__/database/DatabaseUserAdmin.component.spec.ts
@@ -7,6 +7,9 @@ import type { ConnectionConfig } from "@/types/database";
 const mocks = vi.hoisted(() => ({
   ensureConnected: vi.fn(),
   executeQuery: vi.fn(),
+  executeMulti: vi.fn(),
+  productionGuard: vi.fn(),
+  toast: vi.fn(),
 }));
 
 function passthrough(tag: string): Component {
@@ -18,12 +21,40 @@ function passthrough(tag: string): Component {
   });
 }
 
-vi.mock("vue-i18n", () => ({ useI18n: () => ({ t: (key: string) => key }) }));
+function modelInput(): Component {
+  return defineComponent({
+    inheritAttrs: false,
+    setup(_, { attrs }) {
+      return () =>
+        h("input", {
+          ...attrs,
+          value: attrs.modelValue as string,
+          onInput: (event: Event) => (attrs["onUpdate:modelValue"] as ((value: string) => void) | undefined)?.((event.target as HTMLInputElement).value),
+        });
+    },
+  });
+}
+
+function modelDialog(): Component {
+  return defineComponent({
+    inheritAttrs: false,
+    setup(_, { attrs, slots }) {
+      return () => (attrs.open ? h("div", attrs, slots.default?.()) : null);
+    },
+  });
+}
+
+vi.mock("vue-i18n", () => ({
+  useI18n: () => ({
+    t: (key: string, values?: Record<string, unknown>) => (values?.message ? `${key}: ${values.message}` : key),
+  }),
+}));
 vi.mock("@lucide/vue", () => {
   const Icon = passthrough("span");
   return {
     AlertTriangle: Icon,
     Check: Icon,
+    Globe2: Icon,
     KeyRound: Icon,
     Lock: Icon,
     Loader2: Icon,
@@ -39,13 +70,13 @@ vi.mock("@lucide/vue", () => {
 vi.mock("@/components/ui/button", () => ({ Button: passthrough("button") }));
 vi.mock("@/components/ui/badge", () => ({ Badge: passthrough("span") }));
 vi.mock("@/components/ui/dialog", () => ({
-  Dialog: passthrough("div"),
+  Dialog: modelDialog(),
   DialogContent: passthrough("div"),
   DialogFooter: passthrough("div"),
   DialogHeader: passthrough("div"),
   DialogTitle: passthrough("div"),
 }));
-vi.mock("@/components/ui/input", () => ({ Input: passthrough("input") }));
+vi.mock("@/components/ui/input", () => ({ Input: modelInput() }));
 vi.mock("@/components/ui/PasswordInput.vue", () => ({ default: passthrough("input") }));
 vi.mock("@/components/ui/select", () => ({
   Select: passthrough("div"),
@@ -57,14 +88,20 @@ vi.mock("@/components/ui/select", () => ({
 vi.mock("@/stores/connectionStore", () => ({
   useConnectionStore: () => ({ ensureConnected: mocks.ensureConnected }),
 }));
-vi.mock("@/composables/useToast", () => ({ useToast: () => ({ toast: vi.fn() }) }));
+vi.mock("@/composables/useToast", () => ({ useToast: () => ({ toast: mocks.toast }) }));
 vi.mock("@/composables/useSqlHighlighter", () => ({ useSqlHighlighter: () => ({ highlight: (sql: string) => sql }) }));
 vi.mock("@/lib/backend/api", () => ({
   executeQuery: mocks.executeQuery,
-  executeMulti: vi.fn(),
+  executeMulti: mocks.executeMulti,
   listDatabases: vi.fn(),
   listSchemas: vi.fn(),
 }));
+vi.mock("@/lib/database/productionExecutionGuard", () => ({
+  executeWithProductionSqlGuard: (options: { execute: () => Promise<unknown> }) => {
+    mocks.productionGuard(options);
+    return options.execute();
+  },
+}));
 
 import DatabaseUserAdmin from "@/components/admin/DatabaseUserAdmin.vue";
 
@@ -79,6 +116,15 @@ const connection: ConnectionConfig = {
   password: "",
 };
 
+const nativeMysqlConnection: ConnectionConfig = {
+  ...connection,
+  id: "native-mysql",
+  name: "Native MySQL",
+  db_type: "mysql",
+  driver_profile: "mysql",
+  port: 3306,
+};
+
 let app: ReturnType<typeof createApp> | undefined;
 let root: HTMLDivElement | undefined;
 
@@ -142,3 +188,101 @@ describe("DatabaseUserAdmin MySQL grant loading", () => {
     expect(root.textContent).not.toContain("Access denied");
   });
 });
+
+function findButton(text: string): HTMLButtonElement | undefined {
+  return Array.from(root?.querySelectorAll("button") ?? []).find((button) => button.textContent?.trim() === text);
+}
+
+async function mountNativeMysqlUserAdmin() {
+  mocks.ensureConnected.mockResolvedValue(undefined);
+  mocks.executeQuery.mockResolvedValueOnce({ columns: ["user", "host", "plugin"], rows: [["same-user", "old-host", "caching_sha2_password"]] }).mockResolvedValueOnce({ columns: ["Grants"], rows: [["GRANT SELECT ON *.* TO 'same-user'@'old-host'"]] });
+  root = document.createElement("div");
+  document.body.append(root);
+  app = createApp(DatabaseUserAdmin, { connection: nativeMysqlConnection });
+  app.mount(root);
+  await vi.waitFor(() => expect(mocks.executeQuery).toHaveBeenCalledTimes(2));
+  await nextTick();
+}
+
+describe("DatabaseUserAdmin MySQL account Host changes", () => {
+  it("shows the action only for native MySQL and validates the replacement Host", async () => {
+    await mountNativeMysqlUserAdmin();
+
+    findButton("userAdmin.changeHost")?.click();
+    await nextTick();
+    const hostInput = root?.querySelector<HTMLInputElement>('input[placeholder="userAdmin.newHost"]');
+    const previewButton = findButton("userAdmin.previewSql");
+
+    expect(hostInput?.value).toBe("old-host");
+    expect(previewButton?.disabled).toBe(true);
+    hostInput!.value = "   ";
+    hostInput!.dispatchEvent(new Event("input", { bubbles: true }));
+    await nextTick();
+    expect(previewButton?.disabled).toBe(true);
+    hostInput!.value = "  old-host  ";
+    hostInput!.dispatchEvent(new Event("input", { bubbles: true }));
+    await nextTick();
+    expect(previewButton?.disabled).toBe(true);
+
+    const nonNativeRoot = document.createElement("div");
+    document.body.append(nonNativeRoot);
+    app?.unmount();
+    mocks.executeQuery.mockReset();
+    mocks.executeQuery.mockResolvedValueOnce({ columns: ["user", "host", "plugin"], rows: [["same-user", "old-host", "mysql_native_password"]] }).mockResolvedValueOnce({ columns: ["Grants"], rows: [[]] });
+    app = createApp(DatabaseUserAdmin, { connection });
+    app.mount(nonNativeRoot);
+    root?.remove();
+    root = nonNativeRoot;
+    await vi.waitFor(() => expect(mocks.executeQuery).toHaveBeenCalledTimes(2));
+    expect(findButton("userAdmin.changeHost")).toBeUndefined();
+  });
+
+  it("previews the exact RENAME USER SQL and reloads the renamed identity after success", async () => {
+    await mountNativeMysqlUserAdmin();
+    findButton("userAdmin.changeHost")?.click();
+    await nextTick();
+    const hostInput = root?.querySelector<HTMLInputElement>('input[placeholder="userAdmin.newHost"]');
+    hostInput!.value = "new-host";
+    hostInput!.dispatchEvent(new Event("input", { bubbles: true }));
+    await nextTick();
+    findButton("userAdmin.previewSql")?.click();
+    await nextTick();
+
+    expect(root?.textContent).toContain("RENAME USER 'same-user'@'old-host' TO 'same-user'@'new-host';");
+    expect(findButton("userAdmin.applySql")?.getAttribute("variant")).toBe("destructive");
+
+    mocks.executeMulti.mockResolvedValueOnce([]);
+    mocks.executeQuery.mockResolvedValueOnce({ columns: ["user", "host", "plugin"], rows: [["same-user", "new-host", "caching_sha2_password"]] }).mockResolvedValueOnce({ columns: ["Grants"], rows: [["GRANT SELECT ON *.* TO 'same-user'@'new-host'"]] });
+    findButton("userAdmin.applySql")?.click();
+
+    await vi.waitFor(() => expect(mocks.executeMulti).toHaveBeenCalledTimes(1));
+    await vi.waitFor(() => expect(mocks.executeQuery.mock.calls.some((call) => call[2] === "SHOW GRANTS FOR 'same-user'@'new-host';")).toBe(true));
+    expect(mocks.executeMulti.mock.calls[0][2]).toBe("RENAME USER 'same-user'@'old-host' TO 'same-user'@'new-host';");
+    expect(mocks.productionGuard).toHaveBeenCalledWith(expect.objectContaining({ connection: nativeMysqlConnection, sql: "RENAME USER 'same-user'@'old-host' TO 'same-user'@'new-host';" }));
+    expect(mocks.executeQuery.mock.calls.slice(2).map((call) => call[2])).toEqual([
+      "SELECT User AS user, Host AS host, plugin AS plugin FROM mysql.user ORDER BY User, Host;",
+      "SHOW GRANTS FOR 'same-user'@'new-host';",
+    ]);
+    expect(root?.textContent).toContain("same-user@new-host");
+    expect(root?.querySelector('input[placeholder="userAdmin.newHost"]')).toBeNull();
+  });
+
+  it("keeps the old identity selected and surfaces execution errors", async () => {
+    await mountNativeMysqlUserAdmin();
+    findButton("userAdmin.changeHost")?.click();
+    await nextTick();
+    const hostInput = root?.querySelector<HTMLInputElement>('input[placeholder="userAdmin.newHost"]');
+    hostInput!.value = "existing-host";
+    hostInput!.dispatchEvent(new Event("input", { bubbles: true }));
+    await nextTick();
+    findButton("userAdmin.previewSql")?.click();
+    await nextTick();
+    mocks.executeMulti.mockResolvedValueOnce([{ columns: ["error"], rows: [["Operation RENAME USER failed"]], execution_error: true }]);
+    findButton("userAdmin.applySql")?.click();
+
+    await vi.waitFor(() => expect(mocks.toast).toHaveBeenCalledWith("userAdmin.applyFailed: Operation RENAME USER failed", 5000));
+    expect(root?.textContent).toContain("same-user@old-host");
+    expect(root?.querySelector<HTMLInputElement>('input[placeholder="userAdmin.newHost"]')?.value).toBe("existing-host");
+    expect(mocks.executeQuery).toHaveBeenCalledTimes(2);
+  });
+});
diff --git a/apps/desktop/src/lib/__tests__/database/databaseUserAdmin.spec.ts b/apps/desktop/src/lib/__tests__/database/databaseUserAdmin.spec.ts
index 7cfa8e1b01..d5607bfb08 100644
--- a/apps/desktop/src/lib/__tests__/database/databaseUserAdmin.spec.ts
+++ b/apps/desktop/src/lib/__tests__/database/databaseUserAdmin.spec.ts
@@ -9,6 +9,7 @@ import {
   kingbaseShowGrantsSql,
   kingbaseUserAdminProvider,
   mysqlPrivilegeSelectionFromGrants,
+  nativeMysqlUserAdminProvider,
   postgresUserAdminProvider,
   resolveDatabaseUserAdminProviderForConnection,
 } from "@/lib/database/databaseUserAdmin";
@@ -80,6 +81,35 @@ describe("MySQL grant privilege selection", () => {
 });
 
 describe("database user admin providers", () => {
+  it("opts only native MySQL connections into account Host changes", () => {
+    const legacyNative = resolveDatabaseUserAdminProviderForConnection(connection("mysql"));
+    const blankLegacyNative = resolveDatabaseUserAdminProviderForConnection(connection("mysql", "  "));
+    const native = resolveDatabaseUserAdminProviderForConnection(connection("mysql", "mysql"));
+    const normalizedNative = resolveDatabaseUserAdminProviderForConnection(connection("mysql", " MySQL "));
+
+    expect(legacyNative).toBe(nativeMysqlUserAdminProvider);
+    expect(blankLegacyNative).toBe(nativeMysqlUserAdminProvider);
+    expect(native).toBe(nativeMysqlUserAdminProvider);
+    expect(normalizedNative).toBe(nativeMysqlUserAdminProvider);
+    expect(native?.renameUserSql?.({ user: "app'user", host: "old\\host" }, "new'\\host")).toBe(
+      "RENAME USER 'app''user'@'old\\\\host' TO 'app''user'@'new''\\\\host';",
+    );
+  });
+
+  it("does not expose account Host changes to MySQL-compatible providers", () => {
+    const jdbcMysql = { ...connection("jdbc", "mysql"), connection_string: "jdbc:mysql://localhost:3306/app" };
+
+    expect(getDatabaseUserAdminProvider("mysql")?.renameUserSql).toBeUndefined();
+    expect(resolveDatabaseUserAdminProviderForConnection(connection("goldendb", "goldendb"))?.renameUserSql).toBeUndefined();
+    expect(resolveDatabaseUserAdminProviderForConnection(jdbcMysql)?.renameUserSql).toBeUndefined();
+    for (const profile of ["mariadb", "oceanbase", "tidb", "tdsql", "polardb", "greatsql", "goldendb", "doris", "selectdb", "starrocks"]) {
+      expect(resolveDatabaseUserAdminProviderForConnection(connection("mysql", profile))?.renameUserSql, profile).toBeUndefined();
+    }
+    for (const dbType of ["gbase", "doris", "starrocks", "postgres"] as const) {
+      expect(resolveDatabaseUserAdminProviderForConnection(connection(dbType, dbType))?.renameUserSql, dbType).toBeUndefined();
+    }
+  });
+
   it("selects the dedicated provider for GaussDB M-mode connections", () => {
     const provider = resolveDatabaseUserAdminProviderForConnection(connection("gaussdb", "GAUSSDB-M"));
 
diff --git a/apps/desktop/src/lib/database/databaseUserAdmin.ts b/apps/desktop/src/lib/database/databaseUserAdmin.ts
index 04653ac923..4f417660d8 100644
--- a/apps/desktop/src/lib/database/databaseUserAdmin.ts
+++ b/apps/desktop/src/lib/database/databaseUserAdmin.ts
@@ -48,6 +48,7 @@ export interface DatabaseUserAdminProvider {
   showGrantsSql(user: DatabaseUserIdentity): string;
   parseGrants?(result: QueryResult): string[];
   createUserSql?(input: CreatePrincipalInput): string;
+  renameUserSql?(user: DatabaseUserIdentity, newHost: string): string;
   alterPasswordSql?(user: DatabaseUserIdentity, password: string): string;
   alterLoginSql?(user: DatabaseUserIdentity, enabled: boolean): string;
   dropUserSql?(user: DatabaseUserIdentity): string;
@@ -163,6 +164,10 @@ export function mysqlCreateUserSql(input: CreatePrincipalInput): string {
   return `CREATE USER ${mysqlUserAccount(input)} IDENTIFIED BY ${quoteMySqlString(input.password)};`;
 }
 
+export function mysqlRenameUserHostSql(user: DatabaseUserIdentity, newHost: string): string {
+  return `RENAME USER ${mysqlUserAccount(user)} TO ${mysqlUserAccount({ ...user, host: newHost })};`;
+}
+
 export function mysqlAlterUserPasswordSql(user: DatabaseUserIdentity, password: string): string {
   return `ALTER USER ${mysqlUserAccount(user)} IDENTIFIED BY ${quoteMySqlString(password)};`;
 }
@@ -702,6 +707,11 @@ export const mysqlUserAdminProvider: DatabaseUserAdminProvider = {
   privilegeSelectionFromGrants: mysqlPrivilegeSelectionFromGrants,
 };
 
+export const nativeMysqlUserAdminProvider: DatabaseUserAdminProvider = {
+  ...mysqlUserAdminProvider,
+  renameUserSql: mysqlRenameUserHostSql,
+};
+
 export const postgresUserAdminProvider: DatabaseUserAdminProvider = {
   dialect: "postgres",
   defaultScope: "database",
@@ -787,6 +797,9 @@ const DATABASE_USER_ADMIN_PROVIDER_BY_TYPE = new Map<DatabaseType, DatabaseUserA
 
 export function getDatabaseUserAdminProvider(dbType: DatabaseType | undefined, connection?: ConnectionConfig): DatabaseUserAdminProvider | null {
   if (!dbType) return null;
+  if (dbType === "mysql" && connection?.db_type === "mysql" && (!connection.driver_profile?.trim() || connection.driver_profile.trim().toLowerCase() === "mysql")) {
+    return nativeMysqlUserAdminProvider;
+  }
   // GaussDB M mode (MySQL-compatible) uses backtick quoting and treats "user"
   // as a reserved keyword, so a dedicated provider with backtick-quoted aliases
   // is required.