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1 | <?php |
2 | /** |
3 | * |
4 | * This file is part of the phpBB Forum Software package. |
5 | * |
6 | * @copyright (c) phpBB Limited <https://www.phpbb.com> |
7 | * @license GNU General Public License, version 2 (GPL-2.0) |
8 | * |
9 | * For full copyright and license information, please see |
10 | * the docs/CREDITS.txt file. |
11 | * |
12 | */ |
13 | |
14 | namespace phpbb\db\migration\data\v32x; |
15 | |
16 | class user_notifications_table_remove_duplicates extends \phpbb\db\migration\migration |
17 | { |
18 | public static function depends_on() |
19 | { |
20 | return array( |
21 | '\phpbb\db\migration\data\v32x\user_notifications_table_temp_index', |
22 | ); |
23 | } |
24 | |
25 | public function update_data() |
26 | { |
27 | return array( |
28 | array('custom', array(array($this, 'remove_duplicates'))), |
29 | ); |
30 | } |
31 | |
32 | public function remove_duplicates() |
33 | { |
34 | $insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, $this->table_prefix . 'user_notifications'); |
35 | |
36 | $sql = "SELECT item_type, item_id, user_id, method, MAX(notify) AS notify |
37 | FROM {$this->table_prefix}user_notifications |
38 | GROUP BY item_type, item_id, user_id, method |
39 | HAVING COUNT(item_type) > 1"; |
40 | |
41 | $result = $this->sql_query($sql); |
42 | while ($row = $this->db->sql_fetchrow($result)) |
43 | { |
44 | // Delete the duplicate entries |
45 | $this->sql_query("DELETE FROM {$this->table_prefix}user_notifications |
46 | WHERE user_id = {$row['user_id']} |
47 | AND item_type = '{$row['item_type']}' |
48 | AND method = '{$row['method']}'"); |
49 | |
50 | // And re-insert as a single one |
51 | $insert_buffer->insert($row); |
52 | } |
53 | $this->db->sql_freeresult($result); |
54 | } |
55 | } |