[fdo-internals] New RFC posted

Frank Warmerdam warmerdam at pobox.com
Tue Jul 17 15:36:30 EDT 2007

Thomas Knoell wrote:
> Hi,
> A new RFC (*/FDO RFC 5/*) to enhance the FDO API for a function 
> definition has been posted. Please review the RFC and let me know if 
> additional information is required to make a final decision on the RFC.


For those who might like to know before digging into this RFC, it adds
a means to classify FdoFunctionDefinitions, for instance as Aggregate,
Conversion, Date, Math, Numeric, String or Unknown.  The RFC can be
directly accessed at:


Thomas, can you comment on the rationale and use of this new classification
system?  I'm also embarrassed to admit I don't know anything about the role
of these FdoFunctionDefinitions.  Are these functions that can be applied in
expressions on attributes of features for attribute filters?

I'm pleased to see that the change adds a defaulted parameters, and so
presumably doesn't require changes in providers or most other code.  I do
think think it is worth mentioning that this is an ABI change, and (presumably)
that it will be introduced into FDO Trunk.

I'd be +0 on the RFC if we had started voting.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo, http://osgeo.org

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