| Index: branches/wmf/1.16wmf4/maintenance/populateRevisionLength.php |
| — | — | @@ -0,0 +1,98 @@ |
| | 2 | +<?php |
| | 3 | +/* |
| | 4 | + * Populates the rev_len field for old revisions created before MW 1.10. |
| | 5 | + * |
| | 6 | + * This program is free software; you can redistribute it and/or modify |
| | 7 | + * it under the terms of the GNU General Public License as published by |
| | 8 | + * the Free Software Foundation; either version 2 of the License, or |
| | 9 | + * (at your option) any later version. |
| | 10 | + * |
| | 11 | + * This program is distributed in the hope that it will be useful, |
| | 12 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 13 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 14 | + * GNU General Public License for more details. |
| | 15 | + * |
| | 16 | + * You should have received a copy of the GNU General Public License along |
| | 17 | + * with this program; if not, write to the Free Software Foundation, Inc., |
| | 18 | + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| | 19 | + * http://www.gnu.org/copyleft/gpl.html |
| | 20 | + * |
| | 21 | + * @ingroup Maintenance |
| | 22 | + */ |
| | 23 | + |
| | 24 | +require_once( dirname(__FILE__) . '/Maintenance.php' ); |
| | 25 | + |
| | 26 | +class PopulateRevisionLength extends Maintenance { |
| | 27 | + public function __construct() { |
| | 28 | + parent::__construct(); |
| | 29 | + $this->mDescription = "Populates rev_len"; |
| | 30 | + $this->setBatchSize( 200 ); |
| | 31 | + } |
| | 32 | + |
| | 33 | + public function execute() { |
| | 34 | + $db = wfGetDB( DB_MASTER ); |
| | 35 | + if ( !$db->tableExists( 'revision' ) ) { |
| | 36 | + $this->error( "revision table does not exist", true ); |
| | 37 | + } |
| | 38 | + $this->output( "Populating rev_len column\n" ); |
| | 39 | + $start = $db->selectField( 'revision', 'MIN(rev_id)', false, __FUNCTION__ ); |
| | 40 | + $end = $db->selectField( 'revision', 'MAX(rev_id)', false, __FUNCTION__ ); |
| | 41 | + if( is_null( $start ) || is_null( $end ) ){ |
| | 42 | + $this->output( "...revision table seems to be empty.\n" ); |
| | 43 | + $db->insert( 'updatelog', |
| | 44 | + array( 'ul_key' => 'populate rev_len' ), |
| | 45 | + __METHOD__, |
| | 46 | + 'IGNORE' ); |
| | 47 | + return; |
| | 48 | + } |
| | 49 | + # Do remaining chunks |
| | 50 | + $blockStart = intval( $start ); |
| | 51 | + $blockEnd = intval( $start ) + $this->mBatchSize - 1; |
| | 52 | + $count = 0; |
| | 53 | + $missing = 0; |
| | 54 | + while( $blockStart <= $end ) { |
| | 55 | + $this->output( "...doing rev_id from $blockStart to $blockEnd\n" ); |
| | 56 | + $res = $db->select( 'revision', |
| | 57 | + Revision::selectFields(), |
| | 58 | + array( "rev_id >= $blockStart", |
| | 59 | + "rev_id <= $blockEnd", |
| | 60 | + "rev_len IS NULL" ), |
| | 61 | + __METHOD__ ); |
| | 62 | + # Go through and update rev_len from these rows. |
| | 63 | + foreach( $res as $row ) { |
| | 64 | + $rev = new Revision( $row ); |
| | 65 | + $text = $rev->getRawText(); |
| | 66 | + if( !is_string( $text ) ) { |
| | 67 | + # This should not happen, but sometimes does (bug 20757) |
| | 68 | + $this->output("Text of revision {$row->rev_id} unavailable!\n"); |
| | 69 | + $missing++; |
| | 70 | + } |
| | 71 | + else { |
| | 72 | + # Update the row... |
| | 73 | + $db->update( 'revision', |
| | 74 | + array( 'rev_len' => strlen( $text ) ), |
| | 75 | + array( 'rev_id' => $row->rev_id ), |
| | 76 | + __METHOD__ ); |
| | 77 | + $count++; |
| | 78 | + } |
| | 79 | + } |
| | 80 | + $blockStart += $this->mBatchSize; |
| | 81 | + $blockEnd += $this->mBatchSize; |
| | 82 | + wfWaitForSlaves( 5 ); |
| | 83 | + } |
| | 84 | + $logged = $db->insert( 'updatelog', |
| | 85 | + array( 'ul_key' => 'populate rev_len' ), |
| | 86 | + __METHOD__, |
| | 87 | + 'IGNORE' ); |
| | 88 | + if( $logged ) { |
| | 89 | + $this->output( "rev_len population complete ... {$count} rows changed ({$missing} missing)\n" ); |
| | 90 | + return true; |
| | 91 | + } else { |
| | 92 | + $this->output( "Could not insert rev_len population row.\n" ); |
| | 93 | + return false; |
| | 94 | + } |
| | 95 | + } |
| | 96 | +} |
| | 97 | + |
| | 98 | +$maintClass = "PopulateRevisionLength"; |
| | 99 | +require_once( DO_MAINTENANCE ); |