Merge PR #457: Support empty SELECT; statement

Author: nene

src/parser/grammar.ne

@@ -92,6 +92,13 @@ select_clause -> %RESERVED_SELECT (all_columns_asterisk expression:* | asteriskl
     children: [exp, ...expressions],
   })
 %}
+select_clause -> %RESERVED_SELECT {%
+  ([nameToken]) => ({
+    type: NodeType.clause,
+    name: toKeywordNode(nameToken),
+    children: [],
+  })
+%}
 
 all_columns_asterisk -> %ASTERISK {%
   () => ({ type: NodeType.all_columns_asterisk })

test/postgresql.test.ts

@@ -204,6 +204,13 @@ describe('PostgreSqlFormatter', () => {
     `);
   });
 
+  // Regression test for issue #447
+  it('formats empty SELECT', () => {
+    expect(format('SELECT;')).toBe(dedent`
+      SELECT;
+    `);
+  });
+
   // Regression test for issue #391
   it('formats TIMESTAMP WITH TIME ZONE syntax', () => {
     expect(