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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\db\migration\data\v310;
class postgres_fulltext_drop extends \phpbb\db\migration\migration
{
protected $indexes;
public function effectively_installed()
{
// This migration is irrelevant for all non-PostgreSQL DBMSes.
if (strpos($this->db->get_sql_layer(), 'postgres') === false)
{
return true;
}
$this->find_indexes_to_drop();
return empty($this->indexes);
}
static public function depends_on()
{
return array(
'\phpbb\db\migration\data\v310\dev',
);
}
public function update_schema()
{
if (empty($this->indexes))
{
return array();
}
/*
* Drop FULLTEXT indexes related to PostgreSQL fulltext search.
* Doing so is equivalent to dropping the search index from the ACP.
* Possibly time-consuming recreation of the search index (i.e.
* FULLTEXT indexes) is left as a task to the admin to not
* unnecessarily stall the upgrade process. The new search index will
* then require about 40% less table space (also see PHPBB3-11040).
*/
return array(
'drop_keys' => array(
$this->table_prefix . 'posts' => $this->indexes,
),
);
}
public function find_indexes_to_drop()
{
if ($this->indexes !== null)
{
return $this->indexes;
}
$this->indexes = array();
$potential_keys = array('post_subject', 'post_text', 'post_content');
foreach ($potential_keys as $key)
{
if ($this->db_tools->sql_index_exists($this->table_prefix . 'posts', $key))
{
$this->indexes[] = $key;
}
}
return $this->indexes;
}
}
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