[postgis-users] ST_GeomUnion, ST_Union
robe.dnd at cityofboston.gov
Wed Aug 22 06:04:25 PDT 2007
Thanks for the explanation. Actually now I see I was wrong that there
actually isn't an ST_GeomUnion function as I had thought, so things are
But that means the documentation is wrong
Since it says there is an ST_GeomUnion function when there isn't.
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Mark
Sent: Wednesday, August 22, 2007 8:38 AM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] ST_GeomUnion, ST_Union
On Wed, 2007-08-22 at 08:19 -0400, Obe, Regina wrote:
> I notice that in the 1.3.1 that the aggregate function is called
> ST_Union instead of ST_GeomUnion and that the regular function is
> ST_GeomUnion(geom, geom)
> Since the old aggregate was call GeomUnion I had assumed the new would
> just have an ST_ prepended to it.
> I assume this is intended because of some OGC requirement. I'm just
> wondering why they aren't named consistently the same like
> ST_collect aggregate and regular functions.
The reason GeomUnion() exists instead of being just Union() is that
UNION is a PostgreSQL reserved word and so can't be used as a function
ILande - Open Source Consultancy
postgis-users mailing list
postgis-users at postgis.refractions.net
The substance of this message, including any attachments, may be
confidential, legally privileged and/or exempt from disclosure
pursuant to Massachusetts law. It is intended
solely for the addressee. If you received this in error, please
contact the sender and delete the material from any computer.
More information about the postgis-users