[postgis-users] polygons with holes

[Emilia Venturato]

Hi,
there are someone who know how work in Postgis with polygons with holes?
I imported shapefile through GRASS in PostGIS and I had polygons with holes 
that are not valid (isvalid()=false).
If I check validity I has this message:
NOTICE:  Ring Self-intersection

if I try to select, for example:
select a.*, b.the_geom from table a join table b on a.eco_code=b.eco_code;

I have:
Segmentation fault

Someone can help me?
Thank's
Lia


-- 
Emilia Venturato
email+jabber: venturato at faunalia.it
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