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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\v32x; | |
class user_notifications_table_remove_duplicates extends \phpbb\db\migration\migration | |
{ | |
static public function depends_on() | |
{ | |
return array( | |
'\phpbb\db\migration\data\v32x\user_notifications_table_temp_index', | |
); | |
} | |
public function update_data() | |
{ | |
return array( | |
array('custom', array(array($this, 'remove_duplicates'))), | |
); | |
} | |
public function remove_duplicates() | |
{ | |
$insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, $this->table_prefix . 'user_notifications'); | |
$sql = "SELECT item_type, item_id, user_id, method, MAX(notify) AS notify | |
FROM {$this->table_prefix}user_notifications | |
GROUP BY item_type, item_id, user_id, method | |
HAVING COUNT(item_type) > 1"; | |
$result = $this->sql_query($sql); | |
while ($row = $this->db->sql_fetchrow($result)) | |
{ | |
// Delete the duplicate entries | |
$this->sql_query("DELETE FROM {$this->table_prefix}user_notifications | |
WHERE user_id = {$row['user_id']} | |
AND item_type = '{$row['item_type']}' | |
AND method = '{$row['method']}'"); | |
// And re-insert as a single one | |
$insert_buffer->insert($row); | |
} | |
$this->db->sql_freeresult($result); | |
} | |
} |