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SQL Performance tuning (#952)

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MySQL has problems with executing this subquery efficiently.
This commit is contained in:
Maxim Chistyakov 2016-05-12 17:07:41 +03:00 committed by Franz Liedke
parent 68c4dec763
commit 50bbe32175
1 changed files with 5 additions and 3 deletions
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8
framework/core/src/Core/Repository/PostRepository.php
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@ -146,9 +146,11 @@ class PostRepository
protected function getDiscussionsForPosts($postIds, User $actor) protected function getDiscussionsForPosts($postIds, User $actor)
{ {
return Discussion::whereIn('id', function ($query) use ($postIds) { return Discussion::query()
$query->select('discussion_id')->from('posts')->whereIn('id', $postIds); ->select('discussions.*')
}) ->join('posts', 'posts.discussion_id', '=', 'discussions.id')
->whereIn('posts.id', $postIds)
->groupBy('discussions.id')
->whereVisibleTo($actor) ->whereVisibleTo($actor)
->get(); ->get();
} }