RE: nvl affect on idexes

Well, assuming xfoo is a variable, this is not correct...the function is not being used on the indexed field in this case, so the index WILL be used. If xfoo is a column in the table, then I would expect a full table scan to be used.

>>> prakash.bala_at_cingular.com 03/29/01 11:16AM >>>
Eric, Oracle won't use the index in this case. Instead have a function-based index.

Prakash

-----Original Message-----
Sent: Thursday, March 29, 2001 9:43 AM
To: Multiple recipients of list ORACLE-L

Does nvl have any effect on indexes. In other words would it slow down a query if you used the nvl function in the where clause on an indexed field.

i.e.

select *
from foo
where indexField > nvl(xfoo,0);

Thanks,
Eric

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