Support OR REPLACE in CREATE FUNCTION of PostgreSQL

Refs #813

Author: nene

src/languages/postgresql/postgresql.formatter.ts

@@ -126,7 +126,7 @@ const tabularOnelineClauses = expandPhrases([
   'CREATE EXTENSION',
   'CREATE FOREIGN DATA WRAPPER',
   'CREATE FOREIGN TABLE',
-  'CREATE FUNCTION',
+  'CREATE [OR REPLACE] FUNCTION',
   'CREATE GROUP',
   'CREATE INDEX',
   'CREATE LANGUAGE',

test/postgresql.test.ts

@@ -383,4 +383,11 @@ describe('PostgreSqlFormatter', () => {
         foo operator ( !== ) bar;
     `);
   });
+
+  // Issue #813
+  it('supports OR REPLACE in CREATE FUNCTION', () => {
+    expect(format(`CREATE OR REPLACE FUNCTION foo ();`)).toBe(dedent`
+      CREATE OR REPLACE FUNCTION foo ();
+    `);
+  });
 });