SELECT 
            st_astext(ST_PointOnSurface(ST_Buffer(z.geom,0.1))) as geom, 
            z.zonelib as titre,  
            c.cimetierelib||' '||zt.libelle||' '||z.zonelib||' ('||z.zone||')' as description, 
            z.zone as idx
        FROM &DB_PREFIXEzone z
            JOIN &DB_PREFIXEcimetiere c 
                ON c.cimetiere=z.cimetiere 
            JOIN &DB_PREFIXEzone_type zt 
                ON zt.zone_type=z.zonetype 
        WHERE
            z.cimetiere IN (SELECT distinct cimetiere FROM &DB_PREFIXEzone WHERE zone IN (&idx))