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I just re-read the RFC.<br>
<br>
What are your reasons for not storing BBOX releated data in the data
table?<br>
<br>
I would suggest adding four columns, like minx, maxx, miny, max
(perhaps name them via. the geometry_columns table?).<br>
With that approach, and index on the pairs would move the BBOX query
load/optimization into the DBMS.<br>
BBOX queries are simple, and does not require reading the actual column
data.<br>
<br>
Your extended spatial index algorithm might read these values to
produce the search tree.<br>
<br>
Another suggestion, would be to store the search tree in a blob column.<br>
That would enable a much faster load of data.<br>
<br>
To avoid the requirement that all data updaters know the algorithm, it
might be legal to just clear the BLOB data on updates.<br>
<br>
I wrote a short paper on a similar mechanism some time ago, with a
friend:<br>
<a class="moz-txt-link-freetext" href="http://www.hexad.dk/opensource/spatialdbms.pdf">http://www.hexad.dk/opensource/spatialdbms.pdf</a><br>
<br>
<br>
<pre class="moz-signature" cols="72">Regards, Kenneth, GEOGRAF A/S
</pre>
<br>
<br>
Traian Stanev skrev:
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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I just posted FDO RFC #16. Fresh off the virtual
presses (printed
on 100% recycled electrons, for you green-minded folks):<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a moz-do-not-send="true"
href="http://trac.osgeo.org/fdo/wiki/FDORfc16">http://trac.osgeo.org/fdo/wiki/FDORfc16</a><o:p></o:p></p>
<p class="MsoNormal"><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">Traian<o:p></o:p></p>
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