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Add note clarifying WHERE, WITH and HAVING

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- A per Ocramius' explanation in #6563
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Greg Bell 2017-07-22 17:40:56 +10:00
parent 80573038ed
commit 624af3df22
1 changed files with 13 additions and 1 deletions
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docs/en/reference/dql-doctrine-query-language.rst
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@ -356,7 +356,8 @@ article-ids:
$query = $em->createQuery('SELECT u.id, a.id as article_id FROM CmsUser u LEFT JOIN u.articles a'); $query = $em->createQuery('SELECT u.id, a.id as article_id FROM CmsUser u LEFT JOIN u.articles a');
$results = $query->getResult(); // array of user ids and every article_id for each user $results = $query->getResult(); // array of user ids and every article_id for each user
Restricting a JOIN clause by additional conditions: Restricting a JOIN clause by additional conditions specified by
WITH:
.. code-block:: php .. code-block:: php
@ -489,6 +490,17 @@ Joins between entities without associations were not possible until version
<?php <?php
$query = $em->createQuery('SELECT u FROM User u JOIN Blacklist b WITH u.email = b.email'); $query = $em->createQuery('SELECT u FROM User u JOIN Blacklist b WITH u.email = b.email');
.. note::
The differences between WHERE, WITH and HAVING clauses may be
confusing.
- WHERE is applied to the results of an entire query
- WITH is applied to a join as an additional condition. For
arbitrary joins (SELECT f, b FROM Foo f, Bar b WITH f.id = b.id)
the WITH is required, even if it is 1 = 1
- HAVING is applied to the results of a query after
aggregation (GROUP BY)
Partial Object Syntax Partial Object Syntax
^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^