RE: Pushing predicates and Analytic Functions (problem)

From: Khedr, Waleed <Waleed.Khedr_at_FMR.COM>
Date: Thu, 5 Aug 2004 15:20:56 -0400
Message-ID: <42BBD772AC30EA428B057864E203C9991159E1@MSGBOSCLF2WIN.DMN1.FMR.COM>

Solaris and Oracle 9.2.0.4.=20
I looked the bug you mentioned, but I don't have union. The test case I sent earlier is very simple and shows the bug.

Thanks

Waleed

-----Original Message-----

From: Bobak, Mark [mailto:Mark.Bobak_at_il.proquest.com]=20 Sent: Thursday, August 05, 2004 1:26 PM
To: oracle-l_at_freelists.org
Subject: RE: Pushing predicates and Analytic Functions (problem)

Waleed,

What platform/version???

Reference base bug #3607226, still open as I write this. I have an active TAR which I am pursuing. I have a test case that shows:

8.1.7.4 is fine
9.2.0.5 is broken
9.2.0.5+patch for 3607226 fixes SQL but not PL/SQL

10.1.0.2 is broken

I'm currently waiting for development to correct the patch they released to fix the PL/SQL as well as the SQL case.

I can send you my test case, if you're interested. It's pretty large, though.

-Mark

Mark J. Bobak
Oracle DBA
ProQuest Company
Ann Arbor, MI

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Khedr, Waleed Sent: Thursday, August 05, 2004 12:39 PM To: oracle-l_at_freelists.org
Subject: Pushing predicates and Analytic Functions (problem)

I'm having difficulty pushing a predicate into a view that has an analytic function.
Optimizer is determined to keep it as a filter on the last step of the execution plan instead of pushing it to run earlier and does them filtering using the index.

Test case:

create table test_d1 ( c1 number not null, c2 number not null); create index bx1 on test_d1 (c2);

create table test_f1 ( c1 number not null, c2 number not null); create index bx2 on test_f1 (c1);

create or replace view test_bug as
select --+ ordered index(a,bx1) use_nl(b) index(b,x2)

     a.c2,
     rank() over (partition by b.c1 order by b.c2 desc) m_rnk

from test_d1 a, test_f1 b
where a.c1 =3D3D3D b.c1;

create or replace view test_bug1 as
select --+ ordered index(a,bx1) use_nl(b) index(b,x2)

a.c2=3D3D20
from test_d1 a, test_f1 b
where a.c1 =3D3D3D b.c1

select *
from test_bug
where c2 =3D3D3D 10;

Does a full index scan on BX1, I don't like it
Did not push the predicate

select *
from test_bug1
where c2 =3D3D3D 10;

Uses the index correctly (range scan) and drives the NL
The view has no rank function

Any ideas?

Waleed

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Received on Thu Aug 05 2004 - 14:17:21 CDT