diff --git a/src/lib/editor/index.ts b/src/lib/editor/index.ts
index 69afc6e..c563bf8 100644
--- a/src/lib/editor/index.ts
+++ b/src/lib/editor/index.ts
@@ -1,2 +1,2 @@
 export { ClickHouseDialect } from './SQLDialect';
-export { tablesToSQLNamespace } from './utils';
+export { extendsDialect, tablesToSQLNamespace } from './utils';
diff --git a/src/lib/editor/utils.ts b/src/lib/editor/utils.ts
index 3f7bfca..ebc8ac8 100644
--- a/src/lib/editor/utils.ts
+++ b/src/lib/editor/utils.ts
@@ -1,5 +1,6 @@
 import type { ColumnDescriptor, Table } from '$lib/olap-engine';
 import type { Completion } from '@codemirror/autocomplete';
+import { SQLDialect } from '@codemirror/lang-sql';
 
 export function tablesToSQLNamespace(tables: Table[]) {
 	return tables.reduce((acc, table) => {
@@ -12,3 +13,12 @@ export function tablesToSQLNamespace(tables: Table[]) {
 function columnDescriptorToCompletion(cd: ColumnDescriptor): Completion {
 	return { label: cd.name, detail: cd.type, type: 'property' };
 }
+
+export function extendsDialect(dialect: SQLDialect, keywords: string[]) {
+	if (!keywords.length) return dialect;
+
+	return SQLDialect.define({
+		...dialect.spec,
+		keywords: dialect.spec.keywords + ' ' + keywords.join(' ')
+	});
+}
diff --git a/src/lib/olap-engine/engine-chdb.ts b/src/lib/olap-engine/engine-chdb.ts
index 198ee3d..a246cc0 100644
--- a/src/lib/olap-engine/engine-chdb.ts
+++ b/src/lib/olap-engine/engine-chdb.ts
@@ -1,8 +1,9 @@
 import { invoke } from '@tauri-apps/api/core';
 import type { OLAPEngine, OLAPResponse, Table } from './index';
-
 import { Logger } from './Logger';
+
 import CLICKHOUSE_GET_SCHEMA from './queries/clickhouse_get_schema.sql?raw';
+import CLICKHOUSE_GET_UDFS from './queries/clickhouse_get_udfs.sql?raw';
 import CLICKHOUSE_INIT_DB from './queries/clickhouse_init_db.sql?raw';
 
 export class CHDBEngine extends Logger implements OLAPEngine {
@@ -28,4 +29,11 @@ export class CHDBEngine extends Logger implements OLAPEngine {
 		if (!response) return [];
 		return response.data as Table[];
 	}
+
+	async getUDFs() {
+		const response = await this.exec(CLICKHOUSE_GET_UDFS);
+		if (!response) return [];
+
+		return response.data.map((row) => row.name as string);
+	}
 }
diff --git a/src/lib/olap-engine/engine-remote.ts b/src/lib/olap-engine/engine-remote.ts
index d70fc48..77b88dd 100644
--- a/src/lib/olap-engine/engine-remote.ts
+++ b/src/lib/olap-engine/engine-remote.ts
@@ -2,6 +2,7 @@ import type { OLAPEngine, OLAPResponse, Table } from './index';
 import { Logger } from './Logger';
 
 import CLICKHOUSE_GET_SCHEMA from './queries/clickhouse_get_schema.sql?raw';
+import CLICKHOUSE_GET_UDFS from './queries/clickhouse_get_udfs.sql?raw';
 
 export class RemoteEngine extends Logger implements OLAPEngine {
 	async init() {}
@@ -33,6 +34,13 @@ export class RemoteEngine extends Logger implements OLAPEngine {
 		if (!response) return [];
 		return response.data as Table[];
 	}
+
+	async getUDFs() {
+		const response = await this.exec(CLICKHOUSE_GET_UDFS);
+		if (!response) return [];
+
+		return response.data.map((row) => row.name as string);
+	}
 }
 
 interface RemoteEngineException {
diff --git a/src/lib/olap-engine/index.ts b/src/lib/olap-engine/index.ts
index 8540334..fe1f6ac 100644
--- a/src/lib/olap-engine/index.ts
+++ b/src/lib/olap-engine/index.ts
@@ -28,6 +28,7 @@ export interface OLAPEngine extends ILogger {
 	init(): Promise<void>;
 	exec(query: string): Promise<OLAPResponse | undefined>;
 	getSchema(): Promise<Table[]>;
+	getUDFs(): Promise<string[]>;
 }
 
 export const engine: OLAPEngine = PLATFORM === 'WEB' ? new RemoteEngine() : new CHDBEngine();
diff --git a/src/lib/olap-engine/queries/clickhouse_get_udfs.sql b/src/lib/olap-engine/queries/clickhouse_get_udfs.sql
new file mode 100644
index 0000000..6641376
--- /dev/null
+++ b/src/lib/olap-engine/queries/clickhouse_get_udfs.sql
@@ -0,0 +1,6 @@
+select
+  name
+from
+  system.functions
+where
+  origin != 'System'
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index f635548..82a618d 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -9,7 +9,7 @@
 	import TabComponent from '$lib/components/Tab.svelte';
 	import TimeCounter from '$lib/components/TimeCounter.svelte';
 	import { setAppContext } from '$lib/context';
-	import { ClickHouseDialect, tablesToSQLNamespace } from '$lib/editor';
+	import { ClickHouseDialect, extendsDialect, tablesToSQLNamespace } from '$lib/editor';
 	import Bars3 from '$lib/icons/Bars3.svelte';
 	import PanelBottom from '$lib/icons/PanelBottom.svelte';
 	import PanelLeft from '$lib/icons/PanelLeft.svelte';
@@ -26,11 +26,14 @@
 	import { SplitPane } from '@rich_harris/svelte-split-pane';
 	import debounce from 'p-debounce';
 	import { tick, type ComponentProps } from 'svelte';
+	import type { PageData } from './$types';
 
 	let response = $state.raw<OLAPResponse>();
 	let loading = $state(false);
 	let counter = $state<ReturnType<typeof TimeCounter>>();
 
+	let { data }: { data: PageData } = $props();
+
 	async function handleExec() {
 		const query = currentTab.contents;
 		if (loading || !query) {
@@ -311,7 +314,7 @@
 									<Editor
 										bind:value={tab.contents}
 										schema={tablesToSQLNamespace(tables)}
-										dialect={ClickHouseDialect}
+										dialect={extendsDialect(ClickHouseDialect, data.udfs)}
 										placeholder="Type your query..."
 									/>
 								</div>
diff --git a/src/routes/+page.ts b/src/routes/+page.ts
index cdaa54a..d6e52ce 100644
--- a/src/routes/+page.ts
+++ b/src/routes/+page.ts
@@ -3,6 +3,7 @@ import type { PageLoad } from './$types';
 
 export const load = (async () => {
 	await engine.init();
+	const udfs = await engine.getUDFs();
 
-	return {};
+	return { udfs };
 }) satisfies PageLoad;