[fdo-internals] MOTION: FDO RFC 50 - Extend FDO API to Select from Multiple Classes and Select Joins

[Haris Kurtagic]

+1
Haris

On Thu, Jul 22, 2010 at 5:22 PM, Greg Boone <greg.boone at autodesk.com> wrote:
> Hi All,
>
>
>
> If there are no further comments, I motion for a vote to accept “FDO RFC 50
> - Extend FDO API to Select from Multiple Classes and Select Joins.”
> (http://trac.osgeo.org/fdo/wiki/FDORfc50)
>
> +1
>
>
>
> Regards,
>
> Greg
>
>
>
>
>
> From: fdo-internals-bounces at lists.osgeo.org
> [mailto:fdo-internals-bounces at lists.osgeo.org] On Behalf Of Orest Halustchak
> Sent: Friday, June 04, 2010 10:05 AM
> To: FDO Internals Mail List
> Subject: [fdo-internals] New FDO RFC 50 posted - Extend FDO API to Select
> from Multiple Classes and Select Joins
>
>
>
> Hi,
>
>
>
> Please have a look at a new FDO RFC 50 that proposes to extend the FDO api
> to support the ability to use multiple classes in a select and in a filter.
> This would provide the ability the express joins at the fdo level.
>
>
>
> http://trac.osgeo.org/fdo/wiki/FDORfc50
>
>
>
> It is a common capability that users need, the ability to join together two
> or more classes for a result to support analysis, rendering, or other uses.
> Until now, with FDO, this was done at a higher level such as the client-side
> join capabilities within MapGuide. While that capability is useful, it does
> not perform well and is error prone. This enhancement provides us a clear
> way to push that capability down to providers that support it such that they
> can translate the join into native server expressions. In general, I think
> it adds more power and flexibility to the FDO api.
>
>
>
> As usual, this includes capability functions so that applications can
> discover if a provider supports this. We don’t expect all providers to
> support this, mainly the ones that pass through fdo queries to sql.
>
>
>
> I hope you like it. J
>
>
>
> Thanks very much to Romy Dascalescu for putting this together and trying out
> various alternatives.
>
>
>
> Please provide your comments and suggestions.
>
>
>
> Thanks,
>
> Orest.
>
>
>
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