当我运行以下查询时，我得到一个错误:
SELECT
`a`.`sl_id` AS `sl_id`,
`a`.`quote_id` AS `quote_id`,
`a`.`sl_date` AS `sl_date`,
`a`.`sl_type` AS `sl_type`,
`a`.`sl_status` AS `sl_status`,
`b`.`client_id` AS `client_id`,
`b`.`business` AS `business`,
`b`.`affaire_type` AS `affaire_type`,
`b`.`quotation_date` AS `quotation_date`,
`b`.`total_sale_price_with_tax` AS `total_sale_price_with_tax`,
`b`.`STATUS` AS `status`,
`b`.`customer_name` AS `customer_name`
FROM `tbl_supplier_list` `a`
LEFT JOIN `view_quotes` `b`
ON (`b`.`quote_id` = `a`.`quote_id`)
LIMIT 0, 30
错误信息是:
#1449 - The user specified as a definer ('web2vi'@'%') does not exist
为什么会出现这个错误?我该怎么解决呢?
另外，要更改触发器的定义器(ALTER不起作用)，可以这样做:
为每个触发器生成一个DROP和CREATE命令:
SELECT CONCAT("DROP TRIGGER ", trigger_name, ";", " CREATE TRIGGER ", TRIGGER_NAME, " AFTER ", EVENT_MANIPULATION, " ON ", EVENT_OBJECT_SCHEMA, ".", EVENT_OBJECT_TABLE, " FOR EACH ROW ", ACTION_STATEMENT, ";") AS sqlCommand FROM information_schema.triggers WHERE EVENT_OBJECT_SCHEMA = "yourdatabase";
在foreach中执行它。我在我的应用程序中使用这个，当我把生产数据库带到我的开发机器上，用一个foreach遍历所有命令并自动重新创建触发器。这让我可以选择自动化它。
PHP/Laravel中的例子:
$this->info('DROP and CREATE TRIGGERS');
$pdo = DB::connection()->getPdo();
$sql = 'SELECT CONCAT("DROP TRIGGER ", trigger_name, ";", " CREATE TRIGGER ", TRIGGER_NAME, " AFTER ", EVENT_MANIPULATION, " ON ", EVENT_OBJECT_SCHEMA, ".", EVENT_OBJECT_TABLE, " FOR EACH ROW ", ACTION_STATEMENT, ";") AS sqlCommand FROM information_schema.triggers WHERE EVENT_OBJECT_SCHEMA = "mydatabase";';
$stmt = $pdo->prepare($sql, [PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true]);
$stmt->execute();
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
$stmt->closeCursor();
foreach($result as $rs){
$pdo = DB::unprepared($rs['sqlCommand']);
break;
}
提示:我必须用pdo来做，因为mysql缓冲区查询问题，在这里描述
为什么会出现这个错误?我该怎么解决呢?
我花了一个小时才对这样的问题做出决定。但是，在我的例子中，我运行了这个:
mysql> UPDATE `users` SET `somefield` = 1 WHERE `user_id` = 2;
ERROR 1449 (HY000): The user specified as a definer ('root'@'%') does not exist
如果你真的想找到问题，只需要逐个运行这些命令:
SHOW PROCEDURE STATUS;
SHOW FUNCTION STATUS;
SHOW TRIGGERS;
SHOW FULL TABLES IN database_name WHERE TABLE_TYPE LIKE 'VIEW';
.．.然后，在每个字段之后，查找字段'definer'。
在我的例子中，它是一个老旧的触发器，某个开发人员忘记删除了。
