symfony - How i can use full outer join in symfony2 by query builder? -


i want use full outer join querybuilder function. left join used code:

$qb = $qb->select('person')         ->from('s118ebrahimibundle:personentity', 'person')         ->leftjoin('person.phoneentities', 'phone');

but dont know how can perform full outer join!

as can see doctrine2 documentation, isn't possible perform outerjoin (with query builder help, obviously).
2 operation can perform leftjoin , innerjoin

i suppose have write (as plain query, not through query builder)


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