Trigger - Datenbanken

Komplexes BeispielCREATE PROCEDURE DROP_IF_LARGER (IN TABLENAME VARCHAR(20),IN MAXSIZE INT,OUT ACTION_PERFORMED VARCHAR(100))BEGIN ATOMICDECLARE SQLCODE INT DEFAULT 0;DECLARE SIZE INT DEFAULT -1;DECLARE SQL VARCHAR(200);DECLARE C1 CURSOR FOR STMT;DECLARE UNDO HANDLER FOR SQLEXCEPTION BEGINSET ACTION_PERFORMED = 'Ein Fehler ist aufgetreten.';END;SET SQL = 'SELECT COUNT(*) FROM ' || TABLENAME;PREPARE STMT FROM SQL;OPEN C1;FETCH C1 INTO SIZE;CLOSE C1;IF (SIZE