Question

我有一个存储过程

CREATE PROCEDURE `DeleteAttachmentsByIDs`(IN p_ids nvarchar(1024), IN p_modifiedBy varchar(100), IN p_modifiedDate datetime)
BEGIN
    update attachments set
    `IsDeleted` = 1
    , `ModifiedBy` = p_modifiedBy
    , `ModifiedDate` = p_modifiedDate
    where 
    id IN (p_ids);
END

现在我打电话给

CALL `DeleteAttachmentsByIDs`('12479,12480,12481', 'admin', '2019-04-02 15:32:30.558178')

出现错误

Error Code: 1292. Truncated incorrect DOUBLE value: '12479,12480,12481'

附件表的创建表命令为

CREATE TABLE `attachments` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `ObjectID` int(11) DEFAULT NULL,
  `ObjectName` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
  `Category` varchar(100) CHARACTER SET utf8 DEFAULT NULL,
  `ContentType` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
  `ContentLength` bigint(20) DEFAULT NULL,
  `FileName` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
  `Data` longblob,
  `Description` varchar(500) CHARACTER SET utf8 DEFAULT NULL,
  `CreatedBy` varchar(100) CHARACTER SET utf8 DEFAULT NULL,
  `CreatedDate` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `ModifiedBy` varchar(100) CHARACTER SET utf8 DEFAULT NULL,
  `ModifiedDate` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `IsDeleted` tinyint(1) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `Index1` (`id`,`ObjectID`,`ObjectName`,`IsDeleted`)
) ENGINE=InnoDB AUTO_INCREMENT=12482 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

我认为这可能是由需要数组的' in '条件引起的，但是传入了字符串。我认为我需要将字符串拆分为数组以使' in ”的作品。那是正确的，我该怎么做？

Answer 1

在这种情况下，您可以使用FIND_IN_SET：

CREATE PROCEDURE `DeleteAttachmentsByIDs` (IN p_ids NVARCHAR(1024), IN p_modifiedBy VARCHAR(100), IN p_modifiedDate DATETIME)
BEGIN
    UPDATE attachments SET
        `IsDeleted` = 1,
        `ModifiedBy` = p_modifiedBy,
        `ModifiedDate` = p_modifiedDate
    WHERE FIND_IN_SET(id, p_ids) > 0 AND id <> 0; -- AND id <> 0 to support safe-mode.
END

另一个解决方案可以是，将字符串与LIKE进行比较：

CREATE PROCEDURE `DeleteAttachmentsByIDs` (IN p_ids NVARCHAR(1024), IN p_modifiedBy VARCHAR(100), IN p_modifiedDate DATETIME)
BEGIN
    UPDATE attachments SET
        `IsDeleted` = 1,
        `ModifiedBy` = p_modifiedBy,
        `ModifiedDate` = p_modifiedDate
    WHERE CONCAT(',', p_ids, ',') LIKE CONCAT('%,', id, ',%') AND id <> 0; -- AND id <> 0 to support safe-mode.
END

默认情况下，MySQL Workbench使用安全模式。因此，您可以添加AND id <> 0来抑制MySQL Workbench引发的错误。在这里阅读有关安全模式的更多信息：MySQL error code: 1175 during UPDATE in MySQL Workbench

Mysql截断了不正确的DOUBLE值错误，用于字符串检查

1 个答案: