What's wrong with Postgresql trigger?

Question

PostgreSQL

I'm trying to create a very simple trigger:

CREATE TRIGGER example_trigger AFTER INSERT ON USERS
FOR EACH ROW EXECUTE PROCEDURE insertGUID();

This is what my table is called. I also created a trigger function (insertGUID()).
I get:
`syntax error (approximate position: "ON"`.
UPD: So. It seems to work.

Answer 1

... ON "USERS"...