John:

Optimizer is a smart boy!!! He knows the column has few distinct values
and decides the BITMAP access would be appropriate and making BITMAP
plans from the BTree indexes. If you delete the stats for that index,
you will get the old behavior. 

KG



=====
Have a nice day !!
------------------------------------------------------------
Best Regards,
K Gopalakrishnan,
Bangalore, INDIA.
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Author: K Gopalakrishnan
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