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If it was mandatory, the lazy implementer could just call
"DescribeSchema" internally <br>
and return the requested subset.<br>
<br>
So, as I see it, there is little reason not to make it mandatory, but
then again, <br>
I have not not actually created a provider myself.<br>
<br>
<pre class="moz-signature" cols="72">Regards, Kenneth Skovhede, GEOGRAF A/S
</pre>
<br>
<br>
Tom Fukushima skrev:
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<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Hi
Kenneth,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Good
point on the OGR provider.
We should remove the reference to file-based providers since it is
incorrect. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">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?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Tom<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif"; color: windowtext;">From:</span></b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif"; color: windowtext;">
<a class="moz-txt-link-abbreviated" href="mailto:fdo-internals-bounces@lists.osgeo.org">fdo-internals-bounces@lists.osgeo.org</a>
[<a class="moz-txt-link-freetext" href="mailto:fdo-internals-bounces@lists.osgeo.org">mailto:fdo-internals-bounces@lists.osgeo.org</a>] <b>On Behalf Of </b>Kenneth
Skovhede, GEOGRAF A/S<br>
<b>Sent:</b> Thursday, July 10, 2008 12:42 AM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> Re: [fdo-internals] RFC 23 for Review<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I disagree with your views that file-based
providers do not
have this problem.<br>
Some of our customers have a folder with many tables.<br>
This folder is accessed through the OGR provider.<br>
<br>
The customers usually require that the folder is placed on network
storage.<br>
Enumerating and evaluating all files can cause significant delays.<br>
<br>
I suggest that the RFC is updated to include all FDO providers.<br>
<br>
<br>
<o:p></o:p></p>
<pre>Regards, Kenneth Skovhede, GEOGRAF A/S<o:p></o:p></pre>
<p class="MsoNormal"><br>
<br>
Ronnie Louie skrev: <o:p></o:p></p>
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">RFC 23 (<a moz-do-not-send="true"
href="http://trac.osgeo.org/fdo/wiki/FDORfc23">http://trac.osgeo.org/fdo/wiki/FDORfc23</a>)
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.<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">Ronnie<o:p></o:p></p>
<pre><o:p> </o:p></pre>
<pre style="text-align: center;">
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<pre><o:p> </o:p></pre>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>fdo-internals mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true"
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<pre><a moz-do-not-send="true"
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<pre> <o:p></o:p></pre>
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