如何在理论中使用mysql变量 [英] How to use mysql variables in doctrine

问题描述

https://stackoverflow.com/a/12772507/1507546

我想通过学说执行此查询，但下面出现错误

I want to execute this query through doctrine but I'm getting the error below

[Doctrine \ DBAL \ Driver \ PDOException]SQLSTATE [42000]:语法错误或访问冲突:1064 SQL语法有错误；检查与您的MariaDB服务器版本相对应的手册，以在附近使用正确的语法第1行的'@counter:= 0'

[Doctrine\DBAL\Driver\PDOException] SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '@counter := 0' at line 1

这是我的代码

$sql = <<<S
    SET @counter = 0; 
    Select sub.orderid,sub.value,(@counter := @counter +1) as counter
    FROM
    (
        select orderid, 
          round(sum(unitprice * quantity),2) as value
        from order_details
        group by orderid
    ) sub
    order by 2 desc
    limit 10
S;

stmt = $this->_em->getConnection()->prepare($sql);

$stmt->execute();

return $stmt->fetchAll(AbstractQuery::HYDRATE_ARRAY);

推荐答案

大多数sql API在没有额外配置的情况下都不允许多个语句.您需要将它们作为单独的语句传递:

Most sql APIs don't allow multiple statements without extra configuration. You'll need to pass them in as separate statements:

$this->_em->getConnection()->exec("SET @counter = 0"); // May need tweaking, I'm not familiar with Doctrine
$sql = <<<S
    Select sub.orderid,sub.value,(@counter := @counter +1) as counter
    FROM
    (
        select orderid, 
          round(sum(unitprice * quantity),2) as value
        from order_details
        group by orderid
    ) sub
    order by 2 desc
    limit 10
S;

stmt = $this->_em->getConnection()->prepare($sql);

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