[postgis-users] ST_<function> vs <function>

[Obe, Regina]

Steve,
 
Just to add to what Mark said.  There is a little bit more going on than simply a renaming.
 
Most if not all of the ST relation functions have automatic index use enabled in them.
 
For example
 
the old within is really closer to the hidden _ST_Within  and the new 
ST_Within function is equivalent to writing the old 
 
geom1 && geom2 AND Within(geom1, geom2) 
 
Same goes for ST_Contains, ST_Overlap etc.
 
Hope that helps,
Regina

________________________________

From: postgis-users-bounces at postgis.refractions.net on behalf of Mark Cave-Ayland
Sent: Sun 9/9/2007 4:30 PM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] ST_<function> vs <function>



On Sun, 2007-09-09 at 16:03 -0400, Stephen Woodbridge wrote:
> Hi all,
>
> I seem to have missed reading some vital post or something.
>
> What is the difference between ST_<function>() and <function>()?
> Is this just a renaming for namespace issues?
> Are the <function>() names deprecated?
> Are there other benefits to this renaming?
>
> Please explain or point me to the relevant docs.
>
> Thanks,
>    -Steve


Hi Stephen,

I don't remember there being much discussion about this, but the
relevant commit can be found here:
http://postgis.refractions.net/pipermail/postgis-commits/2007-June/000074..html. In short, the old function names are deprecated, and new applications should start to use the ST_ prefix functions instead.


ATB,

Mark.

--
ILande - Open Source Consultancy
http://www.ilande.co.uk <http://www.ilande.co.uk/> 


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