$this->output( "Building content page file cache from page {$start}!\n" );
$dbr = wfGetDB( DB_SLAVE );
$start = $start > 0 ? $start : $dbr->selectField( 'page', 'MIN(page_id)', false, __FUNCTION__ );
$end = $dbr->selectField( 'page', 'MAX(page_id)', false, __FUNCTION__ );
$this->output( "Building content page file cache from page {$start}!\n" );
$dbr = wfGetDB( DB_SLAVE );
$start = $start > 0 ? $start : $dbr->selectField( 'page', 'MIN(page_id)', false, __FUNCTION__ );
$end = $dbr->selectField( 'page', 'MAX(page_id)', false, __FUNCTION__ );