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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\v310; |
| 15 | |
| 16 | class mysql_fulltext_drop extends \phpbb\db\migration\migration |
| 17 | { |
| 18 | protected $indexes; |
| 19 | |
| 20 | public function effectively_installed() |
| 21 | { |
| 22 | // This migration is irrelevant for all non-MySQL DBMSes. |
| 23 | if (strpos($this->db->get_sql_layer(), 'mysql') === false) |
| 24 | { |
| 25 | return true; |
| 26 | } |
| 27 | |
| 28 | $this->find_indexes_to_drop(); |
| 29 | return empty($this->indexes); |
| 30 | } |
| 31 | |
| 32 | public static function depends_on() |
| 33 | { |
| 34 | return array( |
| 35 | '\phpbb\db\migration\data\v310\dev', |
| 36 | ); |
| 37 | } |
| 38 | |
| 39 | public function update_schema() |
| 40 | { |
| 41 | if (empty($this->indexes)) |
| 42 | { |
| 43 | return array(); |
| 44 | } |
| 45 | |
| 46 | /* |
| 47 | * Drop FULLTEXT indexes related to MySQL fulltext search. |
| 48 | * Doing so is equivalent to dropping the search index from the ACP. |
| 49 | * Possibly time-consuming recreation of the search index (i.e. |
| 50 | * FULLTEXT indexes) is left as a task to the admin to not |
| 51 | * unnecessarily stall the upgrade process. The new search index will |
| 52 | * then require about 40% less table space (also see PHPBB3-11621). |
| 53 | */ |
| 54 | return array( |
| 55 | 'drop_keys' => array( |
| 56 | $this->table_prefix . 'posts' => $this->indexes, |
| 57 | ), |
| 58 | ); |
| 59 | } |
| 60 | |
| 61 | public function find_indexes_to_drop() |
| 62 | { |
| 63 | if ($this->indexes !== null) |
| 64 | { |
| 65 | return $this->indexes; |
| 66 | } |
| 67 | |
| 68 | $this->indexes = array(); |
| 69 | $potential_keys = array('post_subject', 'post_text', 'post_content'); |
| 70 | foreach ($potential_keys as $key) |
| 71 | { |
| 72 | if ($this->db_tools->sql_index_exists($this->table_prefix . 'posts', $key)) |
| 73 | { |
| 74 | $this->indexes[] = $key; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return $this->indexes; |
| 79 | } |
| 80 | } |