symfony2 doctrine select IFNULL
Use COALESCE instead of IFNULL like this
$fields = array('COALESCE(s2.id,s1.id) AS effectiveID','COALESCE(s2.status, s1.status) AS effectiveStatus', 'COALESCE(s2.user_id, s1.user_id) as effectiveUser','COALESCE(s2.likes_count, s1.likes_count) as effectiveLikesCount');COALESCE return the first value not null in the list, so if A is null and B not null, then COALESCE(A,B) will return B.
There is a Doctrine extension that adds this among others.
This is the DQL file from IFNULL. https://github.com/beberlei/DoctrineExtensions/blob/master/src/Query/Mysql/IfNull.php
This chapter explains how you use them.http://symfony.com/doc/2.0/cookbook/doctrine/custom_dql_functions.html