Error: Expected Literal, got 'CASE'

Question

I have the following query which I need to modify to work with symfony2.

SELECT someColumn, COUNT(*) AS n, 
SUM(IF(STATUS = 20,1,0)) AS sent 
FROM someTable 
WHERE ID = :id;

What I have done till now:

$query = ("SELECT myEntity.someField AS someColumn,
            SUM(CASE WHEN myEntity.status = '20' then 1 ELSE 0 END) as sent
            FROM AppRoot\MyBundle\Entity\MyEntity myEntity
            WHERE myEntity.id = :id
            ");

But I get the dreaded error:

Error: Expected Literal, got 'CASE' 

Answer 1

Assuming you call it from an EntityRepository, you can instance a \\Doctrine\\ORM\\QueryBuilder like this:

$em = $this->_em->createQueryBuilder();

Next, you can build the query using:

$qb->select(array(
    'myEntity.someField as someColumn',
    'count(myEntity) as n',
    'SUM(CASE WHEN myEntity.status = :status then 1 ELSE 0 END) as sent',
    ... // add all the columns you need
  ))
  ->from('AppRoot\MyBundle\Entity\MyEntity','MyEntity')
  ->where( $qb->expr()->eq('myEntity.id', ':id') )
  ->setParameters(array(
      'status'=>'20',
      'id' => $theEntityId
  ));

And finally you can retrieve your result like this:

$qb->getQuery()->getResult();

or if you prefer a plain old-style array:

$qb->getQuery()->getArrayResult();

This should work and you may inspect the generated queries with:

$qb->getQuery()->getDQL(); // get the Doctrine Query Language query
$qb->getQuery()->getSQL(); // get the SQL generated query