Support for fid-based queries for MapServer WFS support.

[sdlime]

In version 4.8 it became possible to define an item to use for generating 
feature ID for output GML objects. However it is not possible to query based on 
fid: either using a FILTER or using the FEATUREID request parameters.

The most recent email exchange between myself and Assefa is included below for 
completeness.

Steve

------------------------------- snip ------------------------------

Steve,

  Yes using the fid is a valif filter request. Please enter a bug on it 
I will wirk on it in a next weeks (unless it is urgent and I could do it 
next week.)

Thanks.

Steve Lime wrote:

>I was thinking more about the shortcut method (but your example makes send 
too). As I understand it from the WFS spec you can do:
>
>  http://...&SERVICE=WFS&VERSION=1.1.0&REQUEST=GetFeature&TYPENAME=lakes 
>  or  
http://...&SERVICE=WFS&VERSION=1.1.0&REQUEST=GetFeature&TYPENAME=lakes&BBOX=...
>  or  
http://...&SERVICE=WFS&VERSION=1.1.0&REQUEST=GetFeature&TYPENAME=lakes&FILTER=..
.
>  or  
http://...&SERVICE=WFS&VERSION=1.1.0&REQUEST=GetFeature&FEATUREID=lakes.1,lakes.
35,lakes.124 
>
>It's this last request type that is not supported but perhaps should be. I 
can't tell id the fid is valid within a filter request or not. Let me know
>if this makes sense (or not) and I'll create the bug. There already is one for 
adding fid to the output (bug 1413).
>
>Steve
>
>  
>
>>>>Yewondwossen Assefa <assefa@dmsolutions.ca> 02/06/06 6:40 PM >>>
>>>>        
>>>>
>Steve,
>
> The support should be simple. A featureid request in the filter 
>encoding looks soemthing like :
>
><ogc:Filter>
><ogc:FeatureId fid="1234"/>
></ogc:Filter>
>
> From what I understand, there is a gml_featureid that is defined on a 
>layer (?). If that is the case, It is a simple parse of the filter and 
>transform it into "gm_featureid=value" expression.  Is this what yiu 
>have in mind ?  If that is the case, I could add it pretty soon. You 
>could enter a bug on it and assign it to me.
> I am working on the Sensor Web stuff and I would have time to add it.
>
>Later,
>
>
>Steve Lime wrote:
>
>  
>
>>Assefa: Version 4.8 allows folks to define a feature ID item to use when 
producing GML. Given that folks will
>>naturally want to do getFeature requests. How hard would that be to add?
>>
>>Steve

[tomkralidis]

Assefa: I think we support this now?

[assefa]

Yes. Bug related to it is #2102.