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| 1 | <?php |
| 2 | /** |
| 3 | * Efficient concatenated text storage. |
| 4 | * |
| 5 | * @license GPL-2.0-or-later |
| 6 | * @file |
| 7 | */ |
| 8 | |
| 9 | // NO_NAMESPACE Compatibility with serialized objects in permanent storage |
| 10 | |
| 11 | use MediaWiki\MediaWikiServices; |
| 12 | |
| 13 | /** |
| 14 | * To speed up conversion from 1.4 to 1.5 schema, text rows can refer to the |
| 15 | * leftover cur table as the backend. This avoids expensively copying hundreds |
| 16 | * of megabytes of data during the conversion downtime. |
| 17 | */ |
| 18 | class HistoryBlobCurStub { |
| 19 | /** @var int */ |
| 20 | public $mCurId; |
| 21 | |
| 22 | /** |
| 23 | * @param int $curid The cur_id pointed to |
| 24 | */ |
| 25 | public function __construct( $curid = 0 ) { |
| 26 | $this->mCurId = $curid; |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * Sets the location (cur_id) of the main object to which this object |
| 31 | * points |
| 32 | * |
| 33 | * @param int $id |
| 34 | */ |
| 35 | public function setLocation( $id ) { |
| 36 | $this->mCurId = $id; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * @return string|false |
| 41 | */ |
| 42 | public function getText() { |
| 43 | $dbr = MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase(); |
| 44 | return $dbr->newSelectQueryBuilder() |
| 45 | ->select( 'cur_text' ) |
| 46 | ->from( 'cur' ) |
| 47 | ->where( [ 'cur_id' => $this->mCurId ] ) |
| 48 | ->caller( __METHOD__ ) |
| 49 | ->fetchField(); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | // Blobs generated by MediaWiki < 1.5 on PHP 4 were serialized with the |
| 54 | // class name coerced to lowercase. We can improve efficiency by adding |
| 55 | // autoload entries for the lowercase variants of these classes (T166759). |
| 56 | // The code below is never executed, but it is picked up by the AutoloadGenerator |
| 57 | // parser, which scans for class_alias() calls. |
| 58 | /* |
| 59 | class_alias( HistoryBlobCurStub::class, 'historyblobcurstub' ); |
| 60 | */ |