how to initialize DB triggers in Spring boot

I am using Spring boot, I put some DDLs inside schemal.sql and it works well, but it seems it can't parse trigger functions

CREATE OR REPLACE FUNCTION updated_column() RETURNS TRIGGER AS $$
BEGIN
    NEW.updated = now();
    RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TRIGGER updated_time BEFORE UPDATE ON entries FOR EACH ROW EXECUTE PROCEDURE  updated_column();

this throws exceptions while Spring starts up. How should I initialize triggers?