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<?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 ) {
$dbw =& wfGetDB( DB_MASTER );
if( $dbw->indexExists( 'cur', 'name_title' ) &&
$dbw->indexUnique( 'cur', 'name_title' ) ) {
echo wfWikiID().": cur table has the current unique index; no duplicate entries.\n";
} elseif( $dbw->indexExists( 'cur', 'name_title_dup_prevention' ) ) {
echo wfWikiID().": cur table has a temporary name_title_dup_prevention unique index; no duplicate entries.\n";
} else {
echo wfWikiID().": cur table has the old non-unique index and may have duplicate entries.\n";
if( !$indexonly ) {
fixDupes( $fixthem );
}
}
}
?>
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