Hi all I tried to load in Qgis, by using fast SQL layer, a query like this:
SELECT (select ST_Union(ST_Buffer(geom,500)) FROM public.mytable) as geom; This query make a buffer of the features in mytable and union them in a single polygon (if contiguous). It works in pgadmin and in openjump but not in Qgis, because Qgis need a unique value (integer) column coming from the query. Of course I can make a SELECT INTO mynewtable adding a serial field "gid", but if I have a lot of steps to perform my spatial analysis I fill my db with a lot of temp data. So, is there some way to make a "volatile" integer unique field in the above query so Qgis will be happy with it ;-)? I'm using Qgis 1.8 Postgis 2 Thanks Pietro -- View this message in context: http://osgeo-org.1560.n6.nabble.com/How-to-load-postgis-layer-without-gid-if-possible-tp5014459.html Sent from the Quantum GIS - User mailing list archive at Nabble.com. _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
