[postgis-devel] Regular expressions in PostGIS sources

[Jorge Arévalo]

On Mon, Nov 15, 2010 at 7:19 PM, Paul Ramsey <pramsey at opengeo.org> wrote:
> There's some regex support in postgresql core. What do you need regex
> for in raster?
>
> P

Hi Paul,

For MapAlgebra implementation at core level. The ST_MapAlgebra
Pl/pgSQL function takes an input argument like "SELECT rast + 3",
meaning "add 3 to all raster's pixels", and it calls a  core function
(via postgresql function) to perform the operation.

Should I parse the expression in PL/pgSQL function, at postgresql
level or at core level? Now, I'm working only at core level.

Thanks!

-- 
Jorge Arévalo
Internet & Mobilty Division, DEIMOS
jorge.arevalo at deimos-space.com
http://mobility.grupodeimos.com/
http://gis4free.wordpress.com


>
> 2010/11/15 Jorge Arévalo <jorge.arevalo at deimos-space.com>:
>> Hi all,
>>
>> Is there any mechanism in PostGIS to deal with regular expressions and
>> string replacement at core level (I mean, C functions)? I'm going to
>> use string replacement in PostGIS Raster but I don't want to reinvent
>> the wheel, if is invented
>>
>> Many thanks in advance,
>>
>> --
>> Jorge Arévalo
>> Internet & Mobilty Division, DEIMOS
>> jorge.arevalo at deimos-space.com
>> http://mobility.grupodeimos.com/
>> http://gis4free.wordpress.com
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>> http://postgis.refractions.net/mailman/listinfo/postgis-devel
>>
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