[fdo-internals] Counting rows in managed IFeatureReader

Jason Birch Jason.Birch at nanaimo.ca
Wed Apr 23 12:21:54 EDT 2008

Are there any concerns about the number of records changing between the
first SelectAggregates and the Select, or are all providers
transactional across a single session?


-----Original Message-----
From: Robert Fortin
Subject: RE: [fdo-internals] Counting rows in managed IFeatureReader

The 1st select should be a selectaggregate call using function Count()
where it is available.  This will be optimized for most provider, will
avoid a full table scan and will limit the number of trip to the server.
The 2nd is to process those rows as needed.

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