Need a advice here ..
Table "A"
Col1 - PK
Col2 - Low cardinality column ( say 2 or 3 distinct values)
Col3- Low cardinality column
col4- Log Cardinality column
which of the following options is appropriate for the queries like this(
Ours is a high OLTP APPLICATION)
select * from A where col2='a' and col3='1' and col4 = 'b' ;
a) Separate bitmap indexes on each of the columns(col1, col2, col3)
b) Composite bitmap index on the columns col1,col2,col3.
c) Composite b*tree index on the columns col1,col2,col3.
** I remember reading that bitmap is not suitable for high transactional
applications..because of the locks on the blocks..but what is the another
alternative ..
Thanks, Siva
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Author: Valiveru, Siva
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