[fdo-internals] RFC 23 for Review

[Kenneth Skovhede, GEOGRAF A/S]

If it was mandatory, the lazy implementer could just call 
"DescribeSchema" internally
and return the requested subset.

So, as I see it, there is little reason not to make it mandatory, but 
then again,
I have not not actually created a provider myself.

Regards, Kenneth Skovhede, GEOGRAF A/S



Tom Fukushima skrev:
>
> Hi Kenneth,
>
>  
>
> Good point on the OGR provider.  We should remove the reference to 
> file-based providers since it is incorrect. 
>
>  
>
> Currently, the implementation of these APIs are optional so we could 
> do the problematic providers. Are you saying that we should make these 
> APIs mandatory so that all provider writers now have to implement this?
>
>  
>
> Thanks
>
> Tom
>
>  
>
>  
>
>  
>
> *From:* fdo-internals-bounces at lists.osgeo.org 
> [mailto:fdo-internals-bounces at lists.osgeo.org] *On Behalf Of *Kenneth 
> Skovhede, GEOGRAF A/S
> *Sent:* Thursday, July 10, 2008 12:42 AM
> *To:* FDO Internals Mail List
> *Subject:* Re: [fdo-internals] RFC 23 for Review
>
>  
>
> I disagree with your views that file-based providers do not have this 
> problem.
> Some of our customers have a folder with many tables.
> This folder is accessed through the OGR provider.
>
> The customers usually require that the folder is placed on network 
> storage.
> Enumerating and evaluating all files can cause significant delays.
>
> I suggest that the RFC is updated to include all FDO providers.
>
>
> Regards, Kenneth Skovhede, GEOGRAF A/S
>
>
>
> Ronnie Louie skrev:
>
> Hi,
>
>  
>
> RFC 23 (http://trac.osgeo.org/fdo/wiki/FDORfc23) has been posted.  
> This RFC proposes APIs for retrieving feature class information 
> without having to perform a full DescribeSchema.  The main benefit 
> will be improved performance in applications connecting to RDBMS 
> datasources.  Please review the proposal and reply to this list with 
> your comments by July 15, 2008.
>
>  
>
> Thanks
>
> Ronnie
>
>  
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