The fallowing SQL generates false error from your language serve: /* Replace with your SQL commands */ DROP TABLE kittens;  The additional editor highlighting is supplied by "Error Lens" which makes the messages more visable but performs no checks of its own. A similar message is displayed for: /* Replace with your SQL commands */ ALTER TABLE kittens DROP COLUMN age; And even: /* Replace with your SQL commands */ That a comment fallowed by a blank line which is not an error in SQL.