[ 
http://jira.codehaus.org/browse/GEOT-1929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Ben Caradoc-Davies reopened GEOT-1929:
--------------------------------------


Registered function support was removed for Geoserver 2.0-beta2 because it was 
tied to old postgis. It needs to be reimplemented to be more generic and 
complete and work with PostGIS NG..

> Support registered database functions in WFS filter queries
> -----------------------------------------------------------
>
>                 Key: GEOT-1929
>                 URL: http://jira.codehaus.org/browse/GEOT-1929
>             Project: GeoTools
>          Issue Type: New Feature
>          Components: data app-schema
>    Affects Versions: 2.4.5
>            Reporter: Ben Caradoc-Davies
>            Assignee: Ben Caradoc-Davies
>             Fix For: 2.4.5
>
>
> Users want to be able to specify a function in a WFS filter query that is 
> executed on the database server. We are calling these "registered" functions 
> because we anticipate that there will be a register of permitted functions, 
> perhaps listed in a table called "registered_functions".
> This is a more general solution, currently hiding out in 
> community-schemas/jdbc-regfunc on the 2.4.x branch because we are using it 
> for GeoSciML Testbed 3, a community-schemas application. In the future, this 
> functionality should be folded into the regular JDBC and filter support.
> An example of the type of query users wish to use:
> https://www.seegrid.csiro.au/twiki/bin/view/CGIModel/TestBed3UseCase3AProfile
> <ogc:Filter>
>   <ogc:PropertyIsEqualTo>
> <ogc:Function name ="GSML_IS_LITHO"> 
>         
> <ogc:PropertyName>gsml:composition/gsml:CompositionPart/gsml:lithology/gsml:ControlledConcept/gsml:identifi...@codespace='urn:ietf:rfc:2141']</ogc:PropertyName>
>  
>         
> <ogc:Literal>urn:cgi:classifier:CGI:Lithology:2008:wackestone</ogc:Literal > 
>   </ogc:Function> 
>   <ogc:Literal>1</ogc:Literal>
> </ogc:PropertyIsEqualTo>
> </ogc:Filter>

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