SQL & PL/SQL :: Local Index Creation In Oracle Partitioning?
Jul 6, 2010
I have a table which if approc 5GB in size.I am trying to create a partition table from it. I created the new table,but when i am creating local indexes, i am getting an error when i create a unique key. I ll post the creation scripts:
CREATE TABLE A_PT_ORDREG
(
BUS_UNIT VARCHAR2(5) NOT NULL,
ORDER_NO VARCHAR2(15) NOT NULL,
PT_CODE VARCHAR2(15) NOT NULL,
REG_NO VARCHAR2(15) NOT NULL,
AS_APPLICATION VARCHAR2(5) NOT NULL,
[code].....
THE INDEX:
CREATE UNIQUE INDEX PK_A_PT_ORDREG ON A_PT_ORDREG (BUS_UNIT, ORDER_NO, SEQ_NO) local;
I am getting the following error:
ORA-14039: partitioning columns must form a subset of key columns of a UNIQUE index
I Have created a interval partitioned table with local index.But when automatic partitions are created based record insertion, whether local indexes will be created for each newly created partition or not? If created, how to check
Below is the code which I tried
CREATE TABLE interval_date ( date1 date, days VARCHAR2(50) ) PARTITION BY RANGE(date1) INTERVAL (NUMTODSINTERVAL(45,'DAY'))
I have a huge table (about 60 gb) partition over range. The index on this table is global index created on 4 columns together. I have a query which is running very slowly. The explain plan is showing the use of this global index.Explain plan is not showing pstart and pend because the index is global.
There is a very large fact table that is range partitioned by a column DATE_KEY of type NUMBER(38), such that every hour is a different partition. There is a bitmap index BX$FACT#DATE_KEY on field DATE_KEY, which also is a foreign key referencing DATE_DIM (DATE_KEY). There is a different DATE_KEY for every hour, generated as YYYYMMDDHH24.
When I run
"SELECT * FROM FACT WHERE DATE_KEY >= 2012031207 AND DATE_KEY < 2012031208"
to get all the records for 7 am on March 12th, partition pruning kicks in and sees that only one partition is used. The CBO then decides to do a full scan of the partition. This behavior is correct/desired.
If, however, I run
"SELECT * FROM FACT WHERE DATE_KEY = 2012031207 AND DATE_KEY < 2012031209"
to get all the records for 7 and 8 am, Oracle knows that it will have to scan two partitions. The CBO then decides that using the BX$FACT#DATE_KEY must be a good idea and, instead of doing a full scan of the partitions, does access by local index rowid, which is many times slower.
I think I understand the cause - when more than a single partition is involved, Oracle has to use the global index stats (instead of the local ones, like in the first scenario) and the CBO decides to use it because that the selectivity for the global index is great, when in fact the query will return all the rows for that particular partition (no selectivity).
How to get the CBO to choose a full scan in the second scenario as well? I need to support ad-hoc queries generated by a BI tool, so I cannot add hints to the queries. I also can't get rid of the index on DATE_KEY, because in real life the predicates are on fields of the date dimension, not directly on the key, so I need to join on it.
2day i was dropping few unwanted index from the data base, By mistake i removed the local partitioned index , So i want to recreate that index.i create the index, will the partitioned index updates when we add partitioned to the tables.
I have table with 4 partition by range partition. I am loading the table in bulk mode to latest partition. Before I load , I dropped the index and after Load I will be creating index. So when I am dropping index, it is dropping index from all the partitions and when creating the index, I am creating the index for all partitions. When I am creating index using local, it is telling you have to create local index for all partitions at the same time. because of that I have to drop and recreate all indexes again. Again I have to gather stats for whole table .
I was thinking we can build index for one partition and index should remain as is for old partitions If this is not the case, how do I plan my load for a partitioned table using bulk mode to latest partition.
how data is distributed on a local non prefixed index.Let's say I have a table calles SALES and it holds data for the last year partitioned by a date column called month (So that's 12 partitions, one for each month).Now i'm creating the following index: CREATE INDEX TESTIDX ON SALES(salesman_id) local; What will happen is that I'll have 12 partitions on the index but to which partitions in the table are they referencing ?
ALTER TABLE SNYT.PART_ESTD SPLIT PARTITION ESTD_M13_S22 AT ('ESTD', 13, '22') INTO (PARTITION ESTD_M13_S21, PARTITION ESTD_M13_S22) update indexes;
(per http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1401247200346349807) ================================================================= If Global index used
ALTER TABLE SNYT.PART_ESTD SPLIT PARTITION ESTD_M13_S22 AT ('ESTD', 13, '22') INTO (PARTITION ESTD_M13_S21, PARTITION ESTD_M13_S22) UPDATE GLOBAL INDEXES;
I have a partitioned table like below. I want to create a B-Tree index on SALES_RGN column which is neither the part of Primary key or the Partitioned key. Should I create this index as local or Global ?
CREATE TABLE sales_dtl ( txn_id number (9), salesman_id number(5), salesman_name varchar2(30), sales_rgn varchar2(10), -----------------------------> This column needs to be indexed sales_amount number(10), sales_date date, constraint pk_sales_dtl primary key (txn_id) [code]....
I have a quiet large table (around 140 GB) and i want to create an index on it. I was wondering, before i fire my my create index statement, i know in advance how long will it take to complete? I know after the create index is executed, we can monitor and gets some estimates from longops view. but is there any way we estimate before hand?
Also my database is in archive log mode and what would be the fastest way to create an online index?
I am running Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production on RHEL5. I am busy with data pump import, from the log I can see that my import is busy with the constraints.
I am using parameter EXCLUDE=INDEX during the import and I created the index DDL's.
Now I want to manually create indexes while the import is busy.
Will this be advisable to do or what would be the impact?
My table, HMTX have 10 partitions each of one have 6 millions of rows (average). We have 7 partitioned LOCAL indexes in that table. Every month we load data into a new partition (6 million of rows aprox) and drop the oldest partition in table HMTX.
In order to do that we have a script that contain the next statements:
drop of all indexes drop index n1; drop index n...; drop index n7;
[Code]...
create indexes again with tha same storage and degree parameters CREATE INDEX hmtx_TST_N1 ON hmtx (campo1, campo2, campo3 .... campo8) TABLESPACE xxxx PCTFREE 0 INITRANS 2
[Code]....
My problem is in rhe index creation section, despite use parallel with degree 8 and nologging the index was created in :
Elapsed: 02:43:50.85.
In past months that index was created in : Elapsed: 01:43:36.94 Elapsed: 04:48:31.24 Elapsed: 00:57:16.28
there are another way in order speed the index creation ?? o another way to disable ths index ??
I am rebuilding some UNUSABLE local index partitions on Oracle 8.1.7.4.0 (64bit) database . The platform is a HPUX machine.
The DDL of the partition table/indexes: ========================= CREATE TABLE TESTME ( INST_NO CHAR(3) NOT NULL, ACCT_NO CHAR(16) NOT NULL, REC_NO CHAR(9) NOT NULL, TRAN_TYPE CHAR(2) DEFAULT ' ', STAT CHAR(2) DEFAULT ' ', [code]...
We have a table called address and having the address fields and city ,state etc. The table will store huge amount of data .We need to query on the table. I would like to know how can we fasten the query and improve the performance of the query by creating index on these columns...Query is given below . note that the nullable columns can have data
Is there any way to reduce the index creation time. I have one table which has 7700000 records and every day this table get truncate and we create with create table as select statement and then create the 4 indexes and each index took 5 minutes so in totality it took 20 minutes in index creation.
SNRCTL> stat LISTENER Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for IBM/AIX RISC System/6000: Version 11.2.0.1.0 - Production Start Date 19-JAN-2013 00:50:10 Uptime 0 days 0 hr. 29 min. 51 sec Trace Level off Security ON: Local OS Authentication [code]....
In every oracle documentation for e.g:11.2 Scan and Node TNS Listener Setup Examples [ID 1070607.1] we found the local listener status showing both local-ip and vip. Why is not showing in our case?
I want to install the partitioning option in my oracle database. I have the license. When i run the installer and select the partitioning option, the installation begins from beginning overwriting my old setup files. How can i avoid this and only install partitioning.
I have problem to transfer data in non partitioning table to partitioning table.
I have non partitioning table and i create new table partitioning that have same column and type like in non partitioning. So how can i transfer data from table in non partitioning to table in partitioning?
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