select count(*) from a_table where a_column = (select cdk(1234567890) from
dual);
Regards,
Waleed
-----Original Message-----
Sent: Wednesday, June 27, 2001 3:01 PM
To: Multiple recipients of list ORACLE-L
My users are writing many of their own functions and it is causing
performance to suffer
on a few simple queries. For example, I have a query that just selects
count(*) from a
table. With the function
select count(*) from a_table where a_column = cdk(1234567890);
It takes 5 minutes
By plugging in the result of the cdk function into the query
select count(*) from a_table where a_column = 0987654321;
It take .18 of a second.
How can I tell the optimizer that the result of the function will be the
same every
time so you don't need to call it for every row? I can do this in the app
but it would
be cool to know if I can do this on the database side also.
Thanks, Dave
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Author: David Turner
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Author: Khedr, Waleed
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