[fdo-internals] resetting a feature reader

Orest Halustchak orest.halustchak at autodesk.com
Fri Jan 26 13:36:27 EST 2007

Unless the provider internally has cached the results of the select or
provided some other tracking of the select results (e.g. as needed by
the new scrollable feature reader), the provider effectively would have
to re-execute the query anyway. So, I don't think you'd be saving


From: fdo-internals-bounces at lists.osgeo.org
[mailto:fdo-internals-bounces at lists.osgeo.org] On Behalf Of Traian
Sent: Friday, January 26, 2007 12:23 PM
To: fdo-internals at lists.osgeo.org
Subject: [fdo-internals] resetting a feature reader

How hard would it be to provide a Reset() capability for the
FdoIFeatureReader interface?
The example use for that would be for two-pass rendering of features.
I know that one could re-execute the Select command to get the same
reader, but this would in theory incur a higher penalty, since it would
have to redo a spatial query for example.
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