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Code Issues Releases Wiki Activity

[ticket/8779] Slow search for 'View unread posts'

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Adjust SQL query to speedup search for unread posts (thanks naderman).

PHPBB3-8779
This commit is contained in:
rxu 2011-01-24 00:01:18 +07:00
parent ba5c7d8e63
commit ab9d4b3b63
1 changed files with 3 additions and 2 deletions
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5
phpBB/includes/functions.php
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@ -1698,7 +1698,7 @@ function get_unread_topics($user_id = false, $sql_extra = '', $sql_sort = '', $s
if ($config['load_db_lastread'] && $user->data['is_registered'])
{
// Get list of the unread topics
$last_mark = $user->data['user_lastmark'];
$last_mark = (int) $user->data['user_lastmark'];
$sql_array = array(
'SELECT' => 't.topic_id, t.topic_last_post_time, tt.mark_time as topic_mark_time, ft.mark_time as forum_mark_time',
@ -1717,10 +1717,11 @@ function get_unread_topics($user_id = false, $sql_extra = '', $sql_sort = '', $s
),
'WHERE' => "
t.topic_last_post_time > $last_mark AND
(
(tt.mark_time IS NOT NULL AND t.topic_last_post_time > tt.mark_time) OR
(tt.mark_time IS NULL AND ft.mark_time IS NOT NULL AND t.topic_last_post_time > ft.mark_time) OR
(tt.mark_time IS NULL AND ft.mark_time IS NULL AND t.topic_last_post_time > $last_mark)
(tt.mark_time IS NULL AND ft.mark_time IS NULL)
)
$sql_extra
$sql_sort",