[postgis-devel] Re: [postgis-users] how to identify the_geom that cause : RelateOperation called withLWGEOMCOLLECTION type

Kevin Neufeld kneufeld at refractions.net
Mon Dec 8 10:47:18 PST 2008

Ghislain Geniaux wrote:
> otm=# create table info_nonvoue1 as
> otm-# select b.id_parc, z.niv from bd_dispo_finalc as b, ZS2c as z
> otm-# where z.niv=1 and intersects(centroid(b.the_geom),z.the_geom) and 
> b.the_geom && z.the_geom and isvalid(b.the_geom) and isvalid(z.the_geom);
> ERROR:  Relate Operation called with a LWGEOMCOLLECTION type.  This is 
> unsupported
> otm=#


Is it fairly trivial to change the elog in lwgeom_geos.c to your fancy errhint so that when the error is thrown the user 
has an idea where the problem occurs?

The attached patch seems to work, but I got lost when trying to limit the output of the LWGEOMCOLLECTION to the first 
say 128 characters of the WKT representation.


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