Question

我一直在尝试将以下原始sql转移到dql中，我无法做四个小时，你能帮助我吗？此查询在数据库中查找重复的哈希值，并为我提供订单的ID

SELECT h.order_id
FROM `Hash` h
INNER JOIN (SELECT `order_id`,hash
FROM `Hash`
GROUP BY `hash`
HAVING COUNT(*)  > 1
) dt ON h.hash=dt.hash ;

和我的dql现在：

    SELECT h FROM PaymentBundle:Hash h 
JOIN
 (SELECT h1.order, h1.hash FROM PaymentBundle:Hash h1 GROUP BY h1.hash HAVING COUNT(h1)  > 1) 
dt WITH h.hash = dt.hash

但是h1.order给出了语法错误，以及其他所有内容：

  [Semantical Error] line 0, col 40 near '(SELECT h1.hash': Error: Class '(' is not defined.

我尝试将其作为子查询：

$subDql = 'SELECT h1 FROM PaymentBundle:Hash h1 GROUP BY h1.hash HAVING COUNT(h1)  > 1';
$subQuery = $this->getEntityManager()
 ->createQuery($subDql);

$dql = 'SELECT h FROM PaymentBundle:Hash h JOIN ('.$subQuery->getDQL().') dt ON h.hash = dt.hash';
$query = $this->getEntityManager()
  ->createQuery($dql);
return $query->getResult();

它给了我：

[学说\ ORM \查询\ QueryException]
  [语义错误]第0行，第40列附近'（SELECT h1 FROM'：错误：类   '（'未定义。

[学说\ ORM \查询\ QueryException]
  SELECT h FROM PaymentBundle：Hash h JOIN（SELECT h1 FROM   PaymentBundle：Hash h1 GROUP BY h1.hash HAVING COUNT（h1）＆gt; 1）dt ON   h.hash = dt.hash

Answer 1

我的解决方案：

$rsm = new ResultSetMappingBuilder($this->getEntityManager());
        $rsm->addRootEntityFromClassMetadata('PaymentBundle:Hash', 'h');

        $qb = $this->getEntityManager()->createNativeQuery("
               SELECT h.id, h.order_id
FROM `Hash` as h
INNER JOIN (SELECT `order_id`,hash
FROM `Hash`
GROUP BY `hash`
HAVING COUNT(*)  > 1
) dt ON h.hash = dt.hash
                 ", $rsm);
        return $qb->getResult();

Doctrine Query加入子查询语法

1 个答案: