Cross database trigger i Mysql

Ja du kan. Du kan lave en procedure og kalde den i din trigger. Eksempel på procedure:

DELIMITER //

CREATE PROCEDURE delete(in table VARCHAR(300), in db VARCHAR(300), in id INT)
BEGIN

set @query0 = CONCAT('DELETE FROM ', new_db, '.', tabela, ' WHERE id=',id);

PREPARE select_query0 FROM @query0;
EXECUTE select_query0;
DEALLOCATE PREPARE select_query0;

END; //

DELIMITER ;

Og så for at oprette triggeren:

CREATE TRIGGER del_trigger BEFORE DELETE ON table
  FOR EACH ROW BEGIN
    CALL delete(db, table, OLD.id); 
  END;