[postgis-users] GeomUnion() crashes backend?

[strk at refractions.net]

I can reproduce the bug on Postgis-HEAD, PGSQL800.
accum(pgpoly) is enough, so it's not GEOS-related.

One geometry is NULL, and that's the problem.
Tested on PGSQL7.3.4 everything works, so NULL
handling must have changed between PGSQL versions ..

I'm checking this.

--strk;


On Mon, Nov 28, 2005 at 03:11:41PM +0100, Hubert Fröhlich wrote:
> Hi list,
> 
> I am using Postgres on Linux boxes (SuSE 9.3 and 10.2); I use
> 
> PostgreSQL 8.0.3, Geos 2.1.2, Postgis 1.0.2 combination on several HP 
> ProLiant ( Xeon and also Opteron) servers
> PostgreSQL 8.1.0, Geos 2.1.4, Postgis 1.0.4 combination on a pentium4 
> desktop.
> 
> I am doing Postgis GeomUnion() on 3 polygons; 2 of them are relatively 
> large (npoints> 500), one of them is NULL (dont ask me why this is NULL!) .
> 
> The dump is enclosed. (does the attachment get through the firewall? if 
> not, i can mail separately).
> 
> When I try
> testpoly=# select geomunion(pgpoly) from testpoly2;
> server closed the connection unexpectedly
>         This probably means the server terminated abnormally
>         before or while processing the request.
> The connection to the server was lost. Attempting reset: Failed.
> 
> I get a backend crash.
> 
> What has happened?
> 
> 
> 
> I am
> -- 
> Mit freundlichen Grüßen / With kind regards
> 
> Hubert Fröhlich
> 
> -------------------------------------------------------------------------------
> Dr.-Ing. Hubert Fröhlich
> Landesamt für Vermessung und Geoinformation
> Alexandrastr. 4, D-80538 München, GERMANY
> Tel. :+49 (0)89 / 2129 - 2980
> Fax  :+49 (0)89 / 2129 - 2997
> hubert dot froehlich at lvg dot bayern dot de


> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users


-- 

 /"\    ASCII Ribbon Campaign
 \ /    Respect for open standards
  X     No HTML/RTF in email
 / \    No M$ Word docs in email