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| 1 | <?php |
| 2 | /** |
| 3 | * Resets the page_random field for articles in the provided time range. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup Maintenance |
| 22 | */ |
| 23 | |
| 24 | require_once __DIR__ . '/Maintenance.php'; |
| 25 | |
| 26 | /** |
| 27 | * Maintenance script that resets page_random over a time range. |
| 28 | * |
| 29 | * @ingroup Maintenance |
| 30 | */ |
| 31 | class ResetPageRandom extends Maintenance { |
| 32 | public function __construct() { |
| 33 | parent::__construct(); |
| 34 | $this->addDescription( 'Reset the page_random for articles within given date range' ); |
| 35 | $this->addOption( 'from', |
| 36 | 'From date range selector to select articles to update, ex: 20041011000000', false, true ); |
| 37 | $this->addOption( 'to', |
| 38 | 'To date range selector to select articles to update, ex: 20050708000000', false, true ); |
| 39 | $this->addOption( 'dry', 'Do not update column' ); |
| 40 | $this->addOption( 'batch-start', |
| 41 | 'Optional: Use when you need to restart the reset process from a given page ID offset' |
| 42 | . ' in case a previous reset failed or was stopped' |
| 43 | ); |
| 44 | // Initialize batch size to a good default value and enable the batch size option. |
| 45 | $this->setBatchSize( 200 ); |
| 46 | } |
| 47 | |
| 48 | public function execute() { |
| 49 | $batchSize = $this->getBatchSize(); |
| 50 | $dbw = $this->getPrimaryDB(); |
| 51 | $dbr = $this->getReplicaDB(); |
| 52 | $from = wfTimestampOrNull( TS_MW, $this->getOption( 'from' ) ); |
| 53 | $to = wfTimestampOrNull( TS_MW, $this->getOption( 'to' ) ); |
| 54 | |
| 55 | if ( $from === null || $to === null ) { |
| 56 | $this->output( "--from and --to have to be provided" . PHP_EOL ); |
| 57 | return false; |
| 58 | } |
| 59 | if ( $from >= $to ) { |
| 60 | $this->output( "--from has to be smaller than --to" . PHP_EOL ); |
| 61 | return false; |
| 62 | } |
| 63 | $batchStart = (int)$this->getOption( 'batch-start', 0 ); |
| 64 | $changed = 0; |
| 65 | $dry = (bool)$this->getOption( 'dry' ); |
| 66 | |
| 67 | $message = "Resetting page_random column within date range from $from to $to"; |
| 68 | if ( $batchStart > 0 ) { |
| 69 | $message .= " starting from page ID $batchStart"; |
| 70 | } |
| 71 | $message .= $dry ? ". dry run" : '.'; |
| 72 | |
| 73 | $this->output( $message . PHP_EOL ); |
| 74 | do { |
| 75 | $this->output( " ...doing chunk of $batchSize from $batchStart " . PHP_EOL ); |
| 76 | |
| 77 | // Find the oldest page revision associated with each page_id. Iff it falls in the given |
| 78 | // time range AND it's greater than $batchStart, yield the page ID. If it falls outside the |
| 79 | // time range, it was created before or after the occurrence of T208909 and its page_random |
| 80 | // is considered valid. The replica is used for this read since page_id and the rev_timestamp |
| 81 | // will not change between queries. |
| 82 | $queryBuilder = $dbr->newSelectQueryBuilder() |
| 83 | ->select( 'page_id' ) |
| 84 | ->from( 'page' ) |
| 85 | ->where( $dbr->expr( 'page_id', '>', $batchStart ) ) |
| 86 | ->limit( $batchSize ) |
| 87 | ->orderBy( 'page_id' ); |
| 88 | $subquery = $queryBuilder->newSubquery() |
| 89 | ->select( 'MIN(rev_timestamp)' ) |
| 90 | ->from( 'revision' ) |
| 91 | ->where( 'rev_page=page_id' ); |
| 92 | $queryBuilder->andWhere( |
| 93 | '(' . $subquery->getSQL() . ') BETWEEN ' . |
| 94 | $dbr->addQuotes( $dbr->timestamp( $from ) ) . ' AND ' . $dbr->addQuotes( $dbr->timestamp( $to ) ) |
| 95 | ); |
| 96 | |
| 97 | $res = $queryBuilder->caller( __METHOD__ )->fetchResultSet(); |
| 98 | $row = null; |
| 99 | foreach ( $res as $row ) { |
| 100 | if ( !$dry ) { |
| 101 | # Update the row... |
| 102 | $dbw->newUpdateQueryBuilder() |
| 103 | ->update( 'page' ) |
| 104 | ->set( [ 'page_random' => wfRandom() ] ) |
| 105 | ->where( [ 'page_id' => $row->page_id ] ) |
| 106 | ->caller( __METHOD__ ) |
| 107 | ->execute(); |
| 108 | $changed += $dbw->affectedRows(); |
| 109 | } else { |
| 110 | $changed++; |
| 111 | } |
| 112 | } |
| 113 | if ( $row ) { |
| 114 | $batchStart = $row->page_id; |
| 115 | } else { |
| 116 | // We don't need to set the $batchStart as $res is empty, |
| 117 | // and we don't need to do another loop |
| 118 | // the while() condition will evaluate to false and |
| 119 | // we will leave the do{}while() block. |
| 120 | } |
| 121 | |
| 122 | $this->waitForReplication(); |
| 123 | } while ( $res->numRows() === $batchSize ); |
| 124 | $this->output( "page_random reset complete ... changed $changed rows" . PHP_EOL ); |
| 125 | |
| 126 | return true; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | $maintClass = ResetPageRandom::class; |
| 131 | require_once RUN_MAINTENANCE_IF_MAIN; |