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<?php
/**
* Delete old (non-current) revisions from the database
*
* 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
*
* @ingroup Maintenance
* @author Rob Church <robchur@gmail.com>
*/
require_once( dirname( __FILE__ ) . '/Maintenance.php' );
class DeleteOldRevisions extends Maintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "Delete old (non-current) revisions from the database";
$this->addOption( 'delete', 'Actually perform the deletion' );
$this->addOption( 'page_id', 'List of page ids to work on', false );
}
public function execute() {
$this->output( "Delete old revisions\n\n" );
$this->doDelete( $this->hasOption( 'delete' ), $this->mArgs );
}
function doDelete( $delete = false, $args = array() ) {
# Data should come off the master, wrapped in a transaction
$dbw = wfGetDB( DB_MASTER );
$dbw->begin();
$tbl_pag = $dbw->tableName( 'page' );
$tbl_rev = $dbw->tableName( 'revision' );
$pageIdClause = '';
$revPageClause = '';
# If a list of page_ids was provided, limit results to that set of page_ids
if ( sizeof( $args ) > 0 ) {
$pageIdList = implode( ',', $args );
$pageIdClause = " WHERE page_id IN ({$pageIdList})";
$revPageClause = " AND rev_page IN ({$pageIdList})";
$this->output( "Limiting to {$tbl_pag}.page_id IN ({$pageIdList})\n" );
}
# Get "active" revisions from the page table
$this->output( "Searching for active revisions..." );
$res = $dbw->query( "SELECT page_latest FROM $tbl_pag{$pageIdClause}" );
$cur = array();
foreach ( $res as $row ) {
$cur[] = $row->page_latest;
}
$this->output( "done.\n" );
# Get all revisions that aren't in this set
$old = array();
$this->output( "Searching for inactive revisions..." );
$set = implode( ', ', $cur );
$res = $dbw->query( "SELECT rev_id FROM $tbl_rev WHERE rev_id NOT IN ( $set ){$revPageClause}" );
foreach ( $res as $row ) {
$old[] = $row->rev_id;
}
$this->output( "done.\n" );
# Inform the user of what we're going to do
$count = count( $old );
$this->output( "$count old revisions found.\n" );
# Delete as appropriate
if ( $delete && $count ) {
$this->output( "Deleting..." );
$set = implode( ', ', $old );
$dbw->query( "DELETE FROM $tbl_rev WHERE rev_id IN ( $set )" );
$this->output( "done.\n" );
}
# This bit's done
# Purge redundant text records
$dbw->commit();
if ( $delete ) {
$this->purgeRedundantText( true );
}
}
}
$maintClass = "DeleteOldRevisions";
require_once( RUN_MAINTENANCE_IF_MAIN );
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