[postgis-users] Union as an aggregate
pramsey at refractions.net
Mon Sep 29 09:35:17 PDT 2003
> Hello, I'm playing around with GEOS and I wondered why
> there is no aggregate function to use with GEOSUnion.
No reason. It is relatively simple to code up in a dumbass way. Doing it
efficiently is much harder.
> I think an aggregate would be the most natural way to
> use it (does OGC talks about this?).
I agree, it is the way most people will understand union to work. Of
course, OGC makes no mention of such an operating mode at all.
| Paul Ramsey
| Refractions Research
| Email: pramsey at refractions.net
| Phone: (250) 885-0632
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