gnu-social/lib/notices/tagnoticestream.php
Alexei Sorokin e9d1c5593d [CORE] Avoid materialisation in the TagNoticeStream query
The notice.created sort forced the notice_tag by notice join plain to employ
materialisation, which can have a serious performance penalty depending on the
size of the database.
Sort by notice_tag.created instead, which should be exactly the same.
2021-07-16 19:44:37 +01:00

119 lines
3.3 KiB
PHP

<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* Stream of notices with a given tag
*
* @category Stream
* @package GNUsocial
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
defined('GNUSOCIAL') || die();
/**
* Stream of notices with a given tag
*
* @category Stream
* @package GNUsocial
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class TagNoticeStream extends ScopingNoticeStream
{
public function __construct($tag, Profile $scoped=null)
{
parent::__construct(
new CachingNoticeStream(
new RawTagNoticeStream($tag),
'notice_tag:notice_ids:' . Cache::keyize($tag)
),
$scoped
);
}
}
/**
* Raw stream of notices with a given tag
*
* @category Stream
* @package GNUsocial
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class RawTagNoticeStream extends NoticeStream
{
protected $tag;
public function __construct($tag)
{
$this->tag = $tag;
}
public function getNoticeIds($offset, $limit, $since_id, $max_id)
{
$nt = new Notice_tag();
$nt->tag = $this->tag;
$nt->selectAdd();
$nt->selectAdd('notice_id');
Notice::addWhereSinceId($nt, $since_id, 'notice_id');
Notice::addWhereMaxId($nt, $max_id, 'notice_id');
if (!empty($this->selectVerbs)) {
$nt->joinAdd(array('notice_id', 'notice:id'));
$filter = array_keys(array_filter($this->selectVerbs));
if (!empty($filter)) {
// include verbs in selectVerbs with values that equate to true
$nt->whereAddIn('notice.verb', $filter, 'string');
}
$filter = array_keys(array_filter($this->selectVerbs, function ($v) {
return !$v;
}));
if (!empty($filter)) {
// exclude verbs in selectVerbs with values that equate to false
$nt->whereAddIn('!notice.verb', $filter, 'string');
}
}
$nt->orderBy('notice_tag.created DESC, notice_id DESC');
if (!is_null($offset)) {
$nt->limit($offset, $limit);
}
$ids = array();
if ($nt->find()) {
while ($nt->fetch()) {
$ids[] = $nt->notice_id;
}
}
return $ids;
}
}