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 should use two statements: one for drop trigger and another for creating a trigger.

Example:

DROP TRIGGER IF EXISTS my_trigger
  ON my_schema.my_table;
CREATE TRIGGER my_trigger
  BEFORE INSERT OR UPDATE
  ON my_schema.my_table
  FOR EACH ROW EXECUTE PROCEDURE my_schema.my_function();