What is the selectivity of the columns emp_st, emp_status and match?
If there are just 3-4 distinct values in the column, do not use b-tree index
on them. Just drop the Indexes on those columns and try again. If still slow
then try bitmap indexes on those low selectivity columns.
Sanjay
-----Original Message-----
Sent: 23 July, 2002 11:24 PM
To: Multiple recipients of list ORACLE-L
Hi
I am executing following query adn this query hits a number of indices on
this table.let me know what is wrong please.all in where clause are having
indexes.
select name,last_access, reg_date from empmaster where emp_id<1000000
and reg_date>to_date('2001-01-01','YYYY-MM-DD') and
emp_st='valid' and last_access>to_date ('2001-01-01','YYYY-MM-DD')
and emp_status='S' and match='FIRST'
Here all conditions in where clause are having indexes.
How to rewrite this query.
The primary key is emp_id.
Thanks
-Seema
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