更新 MySQL 中的触发器定义器？

Question

如何使用 MySQL 更改过程中的定义器和触发器？

UPDATE `mysql`.`trig` p
    SET definer = 'user@%'
    WHERE definer='root@%'`

Answer 1

对于触发器和视图，您可以使用它，正如我所描述的 here。对于过程，同样的事情应该适用于表 information_schema.routines。

原帖： 我知道这是一个旧帖子，但也许它可以帮助某人。

我使用这个 sql 查询来生成一个 DROP 和一个 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";

当我将生产数据库带到我的开发机器并使用 foreach 处理所有命令并自动重新创建触发器时，我在我的应用程序中使用它。这让我可以选择自动化它。

PHP/Laravel 中的示例：

    $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：由于mysql缓冲区查询问题，我必须用pdo来做，描述here

我的观点也是如此（在这里你可以使用 ALTER TABLE）：

    $pdo = DB::connection()->getPdo();
    $sql = 'SELECT CONCAT("ALTER DEFINER=`homestead` VIEW ", table_name," AS ", view_definition,";") AS sqlCommand FROM  information_schema.views WHERE table_schema="mydatabase";';
    $stmt = $pdo->prepare($sql, [PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true]);
    $stmt->execute();
    $result = $stmt->fetchAll(PDO::FETCH_ASSOC);
    $stmt->closeCursor();
    $this->info('View definer changed');

    foreach($result as $rs){
        $pdo = DB::unprepared($rs['sqlCommand']);
    }

希望对你有帮助。