Create or replace trigger postgres

Question

I want to \"create or replace\" a trigger for a postgres table. However, there is not such sql expression.

I see that I can do a \"DROP TRIGGER IF EXISTS\"

Answer 1

you can use below code.

DO $$ BEGIN

CREATE (trigger, type , ...);

EXCEPTION
  WHEN others THEN null;
END $$;

sample:

DO $$ BEGIN

CREATE TRIGGER trigger_workIDExist
  BEFORE INSERT OR UPDATE ON "GalleryModel"
  FOR EACH ROW EXECUTE PROCEDURE check_workIDExist();

EXCEPTION
  WHEN others THEN null;
END $$;