Format COMMENT ON as keywords

Refs #924

Author: nene

src/languages/postgresql/postgresql.formatter.ts

@@ -112,6 +112,7 @@ const tabularOnelineClauses = expandPhrases([
   'CHECKPOINT',
   'CLOSE',
   'CLUSTER',
+  'COMMENT ON',
   'COMMIT',
   'COMMIT PREPARED',
   'COPY',

test/postgresql.test.ts

@@ -243,4 +243,11 @@ describe('PostgreSqlFormatter', () => {
       })
     ).toBe(dedent`CREATE TABLE foo (id UUID DEFAULT gen_random_uuid());`);
   });
+
+  // Issue #924
+  it('formats keywords in COMMENT ON', () => {
+    expect(format(`comment on table foo is 'Hello my table';`, { keywordCase: 'upper' })).toBe(
+      dedent`COMMENT ON TABLE foo IS 'Hello my table';`
+    );
+  });
 });