How to use mysql variables in doctrine - php

Question

https://stackoverflow.com/a/12772507/1507546
I want to execute this query through doctrine but I'm getting the error below
[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
Here is my code
$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);

Answer 1

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);