[mapserver-dev] layer->vtable->GetFeatureIDColumn

[Howard Butler]

All,

Bart was asking in a bug [1] if the SDE driver could automatically set  
the ows_featureid METADATA record because it is already known by the  
driver.  After thinking about it a bit, I wonder if we shouldn't add  
another virtual method to the layer to attempt to query the column  
name from the driver.  I know that SDE, OGR (depending on the driver),  
Oracle, and maybe some cases of PostGIS should be able to support  
describing which column name represents the FID.  I also don't know  
how it would play with respect to us doing work on the upcoming single- 
pass querying stuff, but I thought I should ask to see if there is  
general support for such an idea.

- If there's support, does this change warrant an RFC?
- I think this would make a nice Toronto sprint item, and I would  
implement it there for the post-5.4 release.

Howard

[1] http://trac.osgeo.org/mapserver/ticket/2859