标签: mysql-error

我有book和store_order桌子。

我想制作触发器（但它包含错误）：

DELIMITER $$
    
CREATE TRIGGER t1 
BEFORE DELETE ON store_order
FOR EACH ROW 
BEGIN
    
    UPDATE book SET number = number + NEW.quantity WHERE ISBN = NEW.ISBN;
    
END
$$
    
DELIMITER ;

我正在尝试在 phpMyAdmin 中创建以下存储过程。但是，我不断收到此错误：#1313 - RETURN is only allowed in a FUNCTION

CREATE PROCEDURE IS_POINT_IN_POLYGON()
BEGIN
DECLARE n INT DEFAULT 0;
DECLARE pX DECIMAL(19,16);
DECLARE pY DECIMAL(19,16);
DECLARE ls LINESTRING;
DECLARE poly1 POINT;
DECLARE poly1X DECIMAL(19,16);
DECLARE poly1Y DECIMAL(19,16);
DECLARE poly2 POINT;
DECLARE poly2X DECIMAL(19,16);
DECLARE poly2Y DECIMAL(19,16);
DECLARE i INT DEFAULT 0;
DECLARE result INT(1) DEFAULT 0;
SET pX = X(p);
SET pY = Y(p);
SET ls = ExteriorRing(poly);
SET poly2 = EndPoint(ls);
SET poly2X = X(poly2);
SET poly2Y …