Hi DBAs,

Oracle 8.1.6 on Sun; DW environment:

Have a table that gets populated by SQL*Loader and thereafter lots of
queries go against this table using different combinations of 4 columns
(date, varchar2(6), varchar2(5), char(1)). Once a row is processed, the
char(1) column gets updated from null to 'Y'. There are no updates to any
other columns or no deletes. Roughly 1000 rows gets inserted to this table
every day.

When I tried 'explain plain' for different queries, I find that a bitmap
index on these 4 columns performs much better than a normal index. Before
implementing this, would like to get your ideas on this.

Appreciate any help!

Prakash
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Author: Bala, Prakash
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