数据库-初学mysql过程存储遇到问题

CREATE OR REPLACE PROCEDURE menuinsert
BEGIN
DECLARE pkno VARCHAR(50);
SELECT menu_pkno INTO pkno FROM menu_info WHERE name='系统设置';
INSERT INTO menu_info (menu_pkno,name,parent_pkno,stage,sort)
VALUES
(UUID(), '项目设置', pkno, '2','1');
END;
EXECUTE menuinsert();