$this->addWhereFld( $this->prefix . '_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
$this->addWhereFld( $this->prefix . '_namespace', $params['namespace'] );
$this->addWhereFld( $this->prefix . '_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
$this->addWhereFld( $this->prefix . '_namespace', $params['namespace'] );