Hi all,
Am 15.07.2013 17:41, schrieb Carsten Fuchs:
we have two queries/QuerySets Q_a and Q_b, each of which use INNER joins
in the generated SQL when evaluated individually.
When I use a Q object to "OR" these two QuerySets, the INNER joins turn
into LEFT OUTER joins -- which in turn cause a huge performance drop
(several hundred times slower than with INNER joins).
Why is this, and can I do anything against it at the Django ORM level?
Can someone provide some help or insights into this, please?
Best regards,
Carsten
--
Dipl.-Inf. Carsten Fuchs
Carsten Fuchs Software
Industriegebiet 3, c/o Rofu, 55768 Hoppstädten-Weiersbach, Germany
Internet: http://www.cafu.de | E-Mail: i...@cafu.de
Cafu - the open-source game and graphics engine for multiplayer 3D action
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