function relationName( $relationType )
    {
        $names = array( eZDBInterface::RELATION_TABLE => 'TABLE',
                        eZDBInterface::RELATION_SEQUENCE => 'SEQUENCE',
                        eZDBInterface::RELATION_TRIGGER => 'TRIGGER',
                        eZDBInterface::RELATION_VIEW => 'VIEW',
                        eZDBInterface::RELATION_INDEX => 'INDEX' );
        if ( !isset( $names[$relationType] ) )
            return false;
        return $names[$relationType];
    }