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Add Database::unionConditionPermutations()
author
Brad Jorsch
<bjorsch@wikimedia.org>
Fri, 16 Jun 2017 17:32:03 +0000
(13:32 -0400)
committer
Anomie
<bjorsch@wikimedia.org>
Fri, 16 Jun 2017 19:39:05 +0000
(19:39 +0000)
Constructs a query for the union of permutations of a set of fields, for
use in situations where the database otherwise makes poor plans due to
inability to use indexes effectively (e.g. T149077 and T168010).
Change-Id: I20980dcada664486c09198b8c45896620bd83e81
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