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Diffstat (limited to 'maintenance/cleanupDupes.inc')
| -rw-r--r-- | maintenance/cleanupDupes.inc | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/maintenance/cleanupDupes.inc b/maintenance/cleanupDupes.inc new file mode 100644 index 00000000..18daab08 --- /dev/null +++ b/maintenance/cleanupDupes.inc @@ -0,0 +1,131 @@ +<?php +# Copyright (C) 2004 Brion Vibber <brion@pobox.com> +# http://www.mediawiki.org/ +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# http://www.gnu.org/copyleft/gpl.html + +/** + * If on the old non-unique indexes, check the cur table for duplicate + * entries and remove them... + * + * @package MediaWiki + * @subpackage Maintenance + */ + +function fixDupes( $fixthem = false) { + $dbw =& wfGetDB( DB_MASTER ); + $cur = $dbw->tableName( 'cur' ); + $old = $dbw->tableName( 'old' ); + $dbw->query( "LOCK TABLES $cur WRITE, $old WRITE" ); + echo "Checking for duplicate cur table entries... (this may take a while on a large wiki)\n"; + $res = $dbw->query( <<<END +SELECT cur_namespace,cur_title,count(*) as c,min(cur_id) as id + FROM $cur + GROUP BY cur_namespace,cur_title +HAVING c > 1 +END + ); + $n = $dbw->numRows( $res ); + echo "Found $n titles with duplicate entries.\n"; + if( $n > 0 ) { + if( $fixthem ) { + echo "Correcting...\n"; + } else { + echo "Just a demo...\n"; + } + while( $row = $dbw->fetchObject( $res ) ) { + $ns = intval( $row->cur_namespace ); + $title = $dbw->addQuotes( $row->cur_title ); + + # Get the first responding ID; that'll be the one we keep. + $id = $dbw->selectField( 'cur', 'cur_id', array( + 'cur_namespace' => $row->cur_namespace, + 'cur_title' => $row->cur_title ) ); + + echo "$ns:$row->cur_title (canonical ID $id)\n"; + if( $id != $row->id ) { + echo " ** minimum ID $row->id; "; + $timeMin = $dbw->selectField( 'cur', 'cur_timestamp', array( + 'cur_id' => $row->id ) ); + $timeFirst = $dbw->selectField( 'cur', 'cur_timestamp', array( + 'cur_id' => $id ) ); + if( $timeMin == $timeFirst ) { + echo "timestamps match at $timeFirst; ok\n"; + } else { + echo "timestamps don't match! min: $timeMin, first: $timeFirst; "; + if( $timeMin > $timeFirst ) { + $id = $row->id; + echo "keeping minimum: $id\n"; + } else { + echo "keeping first: $id\n"; + } + } + } + + if( $fixthem ) { + $dbw->query( <<<END +INSERT + INTO $old + (old_namespace, old_title, old_text, + old_comment, old_user, old_user_text, + old_timestamp, old_minor_edit, old_flags, + inverse_timestamp) +SELECT cur_namespace, cur_title, cur_text, + cur_comment, cur_user, cur_user_text, + cur_timestamp, cur_minor_edit, '', + inverse_timestamp + FROM $cur + WHERE cur_namespace=$ns + AND cur_title=$title + AND cur_id != $id +END + ); + $dbw->query( <<<END +DELETE + FROM $cur + WHERE cur_namespace=$ns + AND cur_title=$title + AND cur_id != $id +END + ); + } + } + } + $dbw->query( 'UNLOCK TABLES' ); + if( $fixthem ) { + echo "Done.\n"; + } else { + echo "Run again with --fix option to delete the duplicates.\n"; + } +} + +function checkDupes( $fixthem = false, $indexonly = false ) { + global $wgDBname; + $dbw =& wfGetDB( DB_MASTER ); + if( $dbw->indexExists( 'cur', 'name_title' ) && + $dbw->indexUnique( 'cur', 'name_title' ) ) { + echo "$wgDBname: cur table has the current unique index; no duplicate entries.\n"; + } elseif( $dbw->indexExists( 'cur', 'name_title_dup_prevention' ) ) { + echo "$wgDBname: cur table has a temporary name_title_dup_prevention unique index; no duplicate entries.\n"; + } else { + echo "$wgDBname: cur table has the old non-unique index and may have duplicate entries.\n"; + if( !$indexonly ) { + fixDupes( $fixthem ); + } + } +} + +?>
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