Jira issue originally created by user @ocramius:
When running following DQL in newly cleared EntityManager, with the provided entities (see attached archive or gist at https://gist.github.com/2473775 ), results in different fetched association:
DQL without join:
SELECT a FROM Entity\A a WHERE a.id = :id
SQL without join:
SELECT a0.a_id AS a_id0, a0_.id AS id1 FROM a a0_ WHERE a0_.aid = ?
Result without join:
$query->getOneOrNullResult()->getB()->getName(); // 'correct'
DQL with fetch join:
SELECT a, b FROM Entity\A a LEFT JOIN a.b b WHERE a.id = :id
SQL with fetch join:
SELECT a0.a_id AS a_id0, b1_.id AS id1, b1_.name AS name2, a0_.id AS id3 FROM a a0_ LEFT JOIN b b1_ ON a0_.id = b1_.id WHERE a0_.aid = ?
Result with fetch join:
$query->getOneOrNullResult()->getB()->getName(); // 'wrong' (different result)
The problem seems to be strictly related with how the @JoinColumn is configured.
Comment created by @ocramius:
Attaching failing test from https://github.com/Ocramius/doctrine2/compare/[DDC-1806](http://www.doctrine-project.org/jira/browse/DDC-1806)
Imported 1 attachments from Jira into https://gist.github.com/beedc9a37c2ef6c093af