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<?php
/**
* Support functions for the deleteOldRevisions script
*
* @file
* @ingroup Maintenance
* @author Rob Church <robchur@gmail.com>
*/
require_once( 'purgeOldText.inc' );
function DeleteOldRevisions( $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})";
echo( "Limiting to {$tbl_pag}.page_id IN ({$pageIdList})\n" );
}
# Get "active" revisions from the page table
echo( "Searching for active revisions..." );
$res = $dbw->query( "SELECT page_latest FROM $tbl_pag{$pageIdClause}" );
while( $row = $dbw->fetchObject( $res ) ) {
$cur[] = $row->page_latest;
}
echo( "done.\n" );
# Get all revisions that aren't in this set
echo( "Searching for inactive revisions..." );
$set = implode( ', ', $cur );
$res = $dbw->query( "SELECT rev_id FROM $tbl_rev WHERE rev_id NOT IN ( $set ){$revPageClause}" );
while( $row = $dbw->fetchObject( $res ) ) {
$old[] = $row->rev_id;
}
echo( "done.\n" );
# Inform the user of what we're going to do
$count = count( $old );
echo( "$count old revisions found.\n" );
# Delete as appropriate
if( $delete && $count ) {
echo( "Deleting..." );
$set = implode( ', ', $old );
$dbw->query( "DELETE FROM $tbl_rev WHERE rev_id IN ( $set )" );
echo( "done.\n" );
}
# This bit's done
# Purge redundant text records
$dbw->commit();
if( $delete ) {
PurgeRedundantText( true );
}
}