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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 mysql_fulltext_drop extends \phpbb\db\migration\migration | |
{ | |
protected $indexes; | |
public function effectively_installed() | |
{ | |
// This migration is irrelevant for all non-MySQL DBMSes. | |
if (strpos($this->db->get_sql_layer(), 'mysql') === 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 MySQL 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 PHPBB3-11621). | |
*/ | |
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; | |
} | |
} |