Doctrine oridinal number with mysql (Error: Expected Literal, got '@')

Question

我需要 mysql 数据库中的序号。我发现如何在 mysql 中模拟 row_num 是这样的：

    SET @row=0;
    SELECT * FROM (
     SELECT (@row:=@row+1) AS no, id,  name FROM `attribute` ORDER BY id
     ) t WHERE name LIKE "%Jo%"

我开始编写代码：

$this->getEntityManager()->getConnection()->exec("SET @counter = 0");

我试过了：

        $this->result = $this->createQueryBuilder('a')
            ->select('a')
            ->where($expr->in('att.ordinal_number', $this->createQueryBuilder('att')->
                    select('(@counter:=@counter+1) AS ordinal_number')->
                    from(\App\Entity\Attribute::class, 'att')->
                    orderBy('att.id')->getDQL()))

我试过了：

        $this->result = $this->createQueryBuilder('a')
            ->select('a')
            ->addSelect('(SELECT (@counter:=@counter+1) AS oridinal_number, id, '
                    .' name FROM App:Entity:Atrribute ORDER BY id)')

以上给我：

Error: Expected Literal, got '@'

有人知道如何用 mysql 模仿 row_number 在教义上吗？提前致谢。

Answer 1

AFAIK 没有直接的方法将这些数据库变量合并到 DQL 或查询构建器中，您需要执行 Native SQL and then use ResultSetMapping class 将查询结果映射到您的实体

SQL

SELECT * 
FROM (
    SELECT (@row:=@row+1) AS no, 
            id,
            name
    FROM `attribute` ,(SELECT @row:=0) t
    ORDER BY id
) t WHERE name LIKE "%Jo%"

结果集映射

$rsm = new ResultSetMapping;
$rsm->addEntityResult('Attribute', 'a');
$rsm->addFieldResult('a', 'id', 'id');
$rsm->addFieldResult('a', 'name', 'name');
$rsm->addScalarResult('no', 'no');

$query = $this->_em->createNativeQuery('SELECT * 
                                        FROM (
                                            SELECT (@row:=@row+1) AS no, 
                                                    id,
                                                    name
                                            FROM attribute ,(SELECT @row:=0) t
                                            ORDER BY id
                                        ) t WHERE name LIKE ?',$rsm);
$query->setParameter(1, '%Jo%');
$users = $query->getResult();

Doctrine oridinal number with mysql (Error: Expected Literal, got '@')

Doctrine oridinal number with mysql (Error: Expected Literal, got '@')

mysql

doctrine

row-number