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List:       postgis-users
Subject:    Re: [postgis-users] GeometryCollection(Empty)
From:       Mark Cave-Ayland <mark.cave-ayland () siriusit ! co ! uk>
Date:       2008-09-30 9:56:36
Message-ID: 48E1F7D4.4000405 () siriusit ! co ! uk
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Charlie Savage wrote:

> To recap:
> 
> * NULL values cause functions such as ST_UNION to return NULL
> * This is counter to postgresql's built in aggregates, such as 
> avg/max/min, which ignore the NULL values
> 
> 
> I think PostGis should change to match the postgresql semantics.

Yes, that sounds entirely sensible.


ATB,

Mark.

-- 
Mark Cave-Ayland
Sirius Corporation - The Open Source Experts
http://www.siriusit.co.uk
T: +44 870 608 0063
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