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<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><a href="http://trac.osgeo.org/fdo/wiki/FDORfc50">http://trac.osgeo.org/fdo/wiki/FDORfc50</a><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I hope you like it. <span style='font-family:Wingdings'>J</span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks very much to Romy Dascalescu for putting this
together and trying out various alternatives.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Please provide your comments and suggestions.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal>Orest.<o:p></o:p></p>
<p class=MsoNormal><i><o:p> </o:p></i></p>
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