无法更新存储函数/触发器中的表“事务”，因为它已被调用此存储函数/触发器的语句使用

Posted 2023-05-09

【中文标题】无法更新存储函数/触发器中的表“事务”，因为它已被调用此存储函数/触发器的语句使用

【英文标题】：Can't update table 'transaction' in stored function/trigger because it is already used by statement which invoked this stored function/trigger

【发布时间】：2014-05-22 13:25:40

【问题描述】：

我的触发器有问题。

DELIMITER $$
CREATE TRIGGER complete_transation
AFTER INSERT ON transaction
FOR EACH ROW BEGIN

DECLARE id_trans INT;
DECLARE id_stock INT;
DECLARE type_transaction BIT(1);
DECLARE id_match INT;

SET @id_trans = NEW.idTransaction;
SET @id_stock = NEW.stock_idStocks;
SET @type_transaction = NEW.type;

IF(@type_transaction = 1) THEN
    SET @id_match = (SELECT idTransaction FROM transaction WHERE stock_idStocks = @id_stock AND type = 0);
    UPDATE transaction SET status = 1 WHERE idTransaction = @id_match;
END IF;
IF(@type_transaction = 0) THEN
    SET @id_match = (SELECT idTransaction FROM transaction WHERE stock_idStocks = @id_stock AND type = 1);
    UPDATE transaction SET status = 1 WHERE idTransaction = @id_match;
END IF;



END$$
DELIMITER ;

是否有机会更改调用触发器的表中的其他记录？

【参考方案1】：

在存储的函数或触发器中，不允许修改已被调用函数或触发器的语句使用（用于读取或写入）的表。 当触发器触发时，它可能会锁定表。