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Index on nullable columns

From: Dirk Köser <D.Koeser_at_DeutschePost.de>
Date: 2000/06/19
Message-ID: <8il1vl$qpq1@ppd00021.deutschepost.de>#1/1 






Hello all



As for Oracle v7.3 I know that:


If there is an index on a nullable column
then no information is stored for rows with NULL-values
which causes full table scans for query predicates like
"col IS NULL"



Has this behaviour changed for version 8.0 / 8.1 ?



Thanks for any comments



Dirk
Received on Mon Jun 19 2000 - 00:00:00 CDT












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