Question

如何在程序中更改definer并使用MySQL触发？

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

Answer 1

对于触发器和视图，可以使用它，正如我所描述的here。对于“过程”，表information_schema.routines应该使用相同的东西。

原始帖子：我知道这是一则旧文章，但也许可以对某人有所帮助。

我使用此sql查询生成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";

当我将生产数据库带到开发机器并在所有命令上使用foreach进行操作并自动重新创建触发器时，我在应用程序中使用了此功能。这给了我自动化的选择。

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，我必须使用pdo进行操作，here

我的观点也一样（在这里您可以使用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']);
    }

希望有帮助。

更新MySQL中的触发器定义器？

1 个答案: