Re: SQL functions and indexes

Dear Sean,
that clause is correct but may cause some misunderstanding. If you use SQL functions in the where predicate of SQL statement Oracle could'nt use index defined on the column which referenced in that function.Therefore poor performance is the expected result of using SQL functions. Actually function indexes in Oracle8i close this gap.

Good luck in exam.
Emine

On Tue, 28 Nov 2000 01:46:08 -0800 "O'Neill, Sean" <Sean.ONeill_at_organon.ie> wrote:
> Last night doing some study for OCP exam I came across a note I had written
> in course material for PL/SQL, "SQL functions ignore table indexes and
> therefore can impact on performance.". So now I'm wondering if this is
> correct or did I take a confused message. Anyone know?
>
> Sean :)
>
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Received on Tue Nov 28 2000 - 06:43:15 CST