$this->addWhereIf( $idField . ' != page_latest', isset( $show['!top'] ) );
$this->addWhereIf( $idField . ' = page_latest', isset( $show['top'] ) );
$this->addWhereIf( 'rev_parent_id != 0', isset( $show['!new'] ) );
$this->addWhereIf( $idField . ' != page_latest', isset( $show['!top'] ) );
$this->addWhereIf( $idField . ' = page_latest', isset( $show['top'] ) );
$this->addWhereIf( 'rev_parent_id != 0', isset( $show['!new'] ) );