Hi!
Some of our developers are having concerns about using views in the
application. So they approached me and wanted to clarify some of their
issues.
When I issues a "select * from viewname", Oracle executes the underlying
select statement of the view. This underlying statement should be optimized
(using availabale indexes on tables etc.)
If I issue a "select * from viewname where condition < 3" or the like, will
the indexes still be used. Or how is this statement executed? Does Oracle
first run the underlying select statement and then apply the "where
condition < 3" to the returned result set? Or is the statement being
rewritten internally?
The Oracle documentation is not very clear on this. Any ideas would be
appreciated.
This is 8.1.6 on Win2k.
Thanks,
Helmut
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Author: Helmut Daiminger
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