oh, sorry, I thought I was replying to the GeoServer-users mailing list, hence I pointed you to the WFS spec.
ok, so you're using GeoTools. The way to limit the returned properties is by using a Query object. Check out the GeoTools query tutorial: <http://docs.geotools.org/latest/userguide/tutorial/filter/query.html> Cheers, Gabriel On Wed, Apr 18, 2012 at 12:22 AM, Gabriel Roldan <[email protected]> wrote: > Filter and CQL are only predicate languages. The WFS spec allows you > to chose which feature properties to return by means of the > propertyName=<property1>[,propertyN]+ parameter for a GetFeature > request using HTTP GET method, or the ogc:PropertyName inside the > wfs:Query element in an XML GetFeature request using HTTP POST method > (perhaps a mixin of both is allowed? don't recall). > > In any case, take a look at the demo requests in your geoserver > default install, and check out the OGC WFS 1.1 specification [1] for > more detail on how to perform data queries. > > Hope that helps, > Gabriel. > > [1] <http://portal.opengeospatial.org/files/?artifact_id=8339> > > On Tue, Apr 17, 2012 at 1:50 PM, Zheng Xudong <[email protected]> wrote: >> Hi all, >> >> I use postgis as my spatial database, and the table contains many columns, >> then when I get the features may lead more overhead of database operation >> and network communication. But not every columns is really needed for my >> each operation. So I want to know, could I choose some columns by Filter or >> CQL when I getting features? It seems that there are no these type of Filter >> or CQL syntax, then could I have any other solutions? >> >> Thanks in advance. >> >> -- >> Zheng Xudong >> State Key Laboratory of Software Development Environment >> School of Computer Science and Engineer, BeiHang University >> >> ------------------------------------------------------------------------------ >> Better than sec? Nothing is better than sec when it comes to >> monitoring Big Data applications. Try Boundary one-second >> resolution app monitoring today. Free. >> http://p.sf.net/sfu/Boundary-dev2dev >> _______________________________________________ >> GeoTools-GT2-Users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >> > > > > -- > Gabriel Roldan > OpenGeo - http://opengeo.org > Expert service straight from the developers. -- Gabriel Roldan OpenGeo - http://opengeo.org Expert service straight from the developers. ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ GeoTools-GT2-Users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
