Support IDENTIFIER() syntax in Snowflake

Fixes #883

Author: nene

src/languages/snowflake/snowflake.functions.ts

@@ -219,6 +219,7 @@ export const functions: string[] = [
   'HOUR',
   'MINUTE',
   'SECOND',
+  'IDENTIFIER', // Not technically a function, but works as one for formatting purposes
   'IFF',
   'IFNULL',
   'ILIKE',

test/snowflake.test.ts

@@ -214,4 +214,11 @@ describe('SnowflakeFormatter', () => {
         FILTER(my_arr, a -> a:value >= 50);
     `);
   });
+
+  // Issue #883
+  it('supports IDENTIFIER() syntax', () => {
+    expect(format(`CREATE TABLE identifier($foo);`)).toBe(dedent`
+      CREATE TABLE identifier($foo);
+    `);
+  });
 });