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 complex
Affects Versions: 2.4.5
Reporter: Ben Caradoc-Davies
Assignee: Ben Caradoc-Davies
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:[EMAIL
PROTECTED]'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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