sql语句报错，请教~~~

[miniala]

请教下面这个哪里出错了呢~~~

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7

CREATE TRIGGER trg_task
AFTER UPDATE ON projects
FOR EACH ROW
BEGIN
CASE NEW.project_status
WHEN 'COMPLETED' THEN
UPDATE tasks SET task_percent=100 WHERE project_id = NEW.project_id;
WHEN 'CANCELLED' THEN
UPDATE tasks SET task_percent=-1 WHERE project_id = NEW.project_id;
END CASE;
END

[ACMAIN_CHM]

delimiter //
CREATE TRIGGER trg_task
AFTER UPDATE ON projects
FOR EACH ROW
BEGIN
CASE NEW.project_status
WHEN 'COMPLETED' THEN
UPDATE tasks SET task_percent=100 WHERE project_id = NEW.project_id;
WHEN 'CANCELLED' THEN
UPDATE tasks SET task_percent=-1 WHERE project_id = NEW.project_id;
END CASE;
END

//

[WWWWA]

DELIMITER $$
CREATE TRIGGER trg_task
AFTER UPDATE ON projects
FOR EACH ROW
BEGIN
CASE NEW.project_status
WHEN 'COMPLETED' THEN
UPDATE tasks SET task_percent=100 WHERE project_id = NEW.project_id;
WHEN 'CANCELLED' THEN
UPDATE tasks SET task_percent=-1 WHERE project_id = NEW.project_id;
END CASE;
END$$
DELIMITER ;