RE: Disabling local partitioned indexes for load

From: John Weatherman <john.weatherman_at_replacements.com>
Date: Tue, 10 Sep 2002 09:36:09 -0400
Message-Id: <22528.293302@fatcity.com>

Beth,

This seems to be it. If I disable to PK, the ignore for everything else is happy...so, the question becomes...

I have a table that represents quarterly data. The data in it is basically the same for every quarter...adding the period is what makes things unique. What is important from a processing standpoint is that no row in a single period be a duplicate, duplicates sans period are fine across the table.

Due to indexing, loading each successive period is taking way too long, approx. 24 hours. Without indexes this is a matter of a couple hours tops.

In this situation, would it make since to (yes this is heresy) NOT have a PK constraint, but have unique indexes on each partition. The UIs concatenated with the periods effectively ARE the PK, but because all the indexes are made local, I can now disable them on the new period during loads.

Other than religious conviction (and for the record, I routinely tell developers to NEVER request a table without a PK), am I missing a good reason not to do this?

TIA, John P Weatherman
Database Administrator
Replacements Ltd.

-----Original Message-----
From: Seefelt, Beth [mailto:Beth.Seefelt_at_TetleyUSA.com] Sent: Monday, September 09, 2002 5:25 PM To: Multiple recipients of list ORACLE-L Subject: RE: Disabling local partitioned indexes for load

Hi,

I believe there is the caveat that it doesn't apply to pk indexes, because they are required to enforce the integrity constaint, although I can't find that in the documentation at the moment.

Beth

-----Original Message-----
Sent: Monday, September 09, 2002 5:03 PM To: Multiple recipients of list ORACLE-L

Sorry...sent with the wrong heading......

-----Original Message-----
Sent: Monday, September 09, 2002 4:18 PM To: Multiple recipients of list ORACLE-L

Hi all,

I have a large data load to run into a partitioned table. With indexes the
load takes over 24 hours, without on the order of 3 hours, obviously, I don't want to mess with the indexes until after the job completes. So I

try to drop to local indexes and get ORA-14076. Fair enough. I go to metastink and see note 107976.1...exactly what I want. So I try to use it...and get ORA-01502. Has anybody done something like this and found there's an extra caveat from the note? Every other note oracle has seems to point back to the original one I am using. I'm on Solaris 8/Oracle 9.0.1.3.

Any help would be appreciated. Here's the output I'm getting...

SQL> select index_name, status from dba_ind_partitions where partition_name
= 'TYPE13';

INDEX_NAME                     STATUS
------------------------------ --------
I_BUY_PR_PCE_TYPE_HIST_3       USABLE
I_BUY_PR_PCE_TYPE_HIST_2       USABLE
I_BUY_PR_PCE_TYPE_HIST_1       USABLE

PK_BUY_PRICE_PCE_TYPE_HISTORY USABLE SQL> ALTER TABLE buy_price_piece_type_history MODIFY PARTITION type13 2 UNUSABLE LOCAL INDEXES; Table altered.

SQL> select index_name, status from dba_ind_partitions where partition_name
= 'TYPE13';

INDEX_NAME                     STATUS
------------------------------ --------
I_BUY_PR_PCE_TYPE_HIST_3       UNUSABLE
I_BUY_PR_PCE_TYPE_HIST_2       UNUSABLE
I_BUY_PR_PCE_TYPE_HIST_1       UNUSABLE

PK_BUY_PRICE_PCE_TYPE_HISTORY UNUSABLE SQL> ALTER SESSION SET skip_unusable_indexes = true;

Session altered.

SQL> insert into buy_price_piece_type_history partition (type13) select *
from hold_type13;
insert into buy_price_piece_type_history partition (type13) select * from
hold_type13
*
ERROR at line 1:
ORA-01502: index 'RLADMIN.PK_BUY_PRICE_PCE_TYPE_HISTORY' or partition of such
index is in unusable state

SQL> TIA, John P Weatherman
Database Administrator
Replacements Ltd.
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Author: John Weatherman
INET: john.weatherman_at_replacements.com

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Author: Seefelt, Beth
INET: Beth.Seefelt_at_TetleyUSA.com

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