Modifying a Range Partition

Hi! Guys
I have a table partitioned by a date column.. My current highest partition is:
SPSWEEK14 VALUES LESS THAN (TO_DATE(' 2008-02-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
How can I modify this partition to 2008-04-01?
Thanks in advance
Babu Yalamanchi
P.S. We are using Oracle 9.2

I dont think so, we can not modify range of any partition. What I suggest here is we can add partition and then merge that partition with higher value, So at the end you will get one partition with higher value. But make sure to take care of invalid index and all that.

Similar Messages

Subpartition existing range partition in Oracle

I have table xyz with following structure
xyz ( vld_dte date,
prd_typ varchar2(100),
sales number
table XYZ is partitioned by range on field vld_dte and partitions are monthly partitions like JAN-2009 , FEB-2009....DEC-2009 and so on.table is currently loaded with data.
How can I modify existing range partition into composite range-list partition so that every partiton is subpartitioned on prd_typ , basically three sub-partitions for every partition 1- Grocery , 2-Home decoration,3-OTHERS

ORA-14759: SET INTERVAL is not legal on this table.
Cause: ALTER TABLE SET INTERVAL is only legal on a range partitioned table with a single partitioning column. Additionally this table cannot have a maxvalue partition.
Action: Use SET INTERVAL only on a valid table
mark answered post as helpful / correct*

Modify HUGE HASH partition table to RANGE partition and HASH subpartition

I have a table with 130,000,000 rows hash partitioned as below
----RANGE PARTITION--
CREATE TABLE TEST_PART(
C_NBR CHAR(12),
YRMO_NBR NUMBER(6),
LINE_ID CHAR(2))
PARTITION BY RANGE (YRMO_NBR)(
PARTITION TEST_PART_200009 VALUES LESS THAN(200009),
PARTITION TEST_PART_200010 VALUES LESS THAN(200010),
PARTITION TEST_PART_200011 VALUES LESS THAN(200011),
PARTITION TEST_PART_MAX VALUES LESS THAN(MAXVALUE)
CREATE INDEX TEST_PART_IX_001 ON TEST_PART(C_NBR, LINE_ID);
Data: -
INSERT INTO TEST_PART
VALUES ('2000',200001,'CM');
INSERT INTO TEST_PART
VALUES ('2000',200009,'CM');
INSERT INTO TEST_PART
VALUES ('2000',200010,'CM');
VALUES ('2006',NULL,'CM');
COMMIT;
Now, I need to keep this table from growing by deleting records that fall b/w a specific range of YRMO_NBR. I think it will be easy if I create a range partition on YRMO_NBR field and then create the current hash partition as a sub-partition.
How do I change the current partition of the table from HASH partition to RANGE partition and a sub-partition (HASH) without losing the data and existing indexes?
The table after restructuring should look like the one below
COMPOSIT PARTITION-- RANGE PARTITION & HASH SUBPARTITION --
CREATE TABLE TEST_PART(
C_NBR CHAR(12),
YRMO_NBR NUMBER(6),
LINE_ID CHAR(2))
PARTITION BY RANGE (YRMO_NBR)
SUBPARTITION BY HASH (C_NBR) (
PARTITION TEST_PART_200009 VALUES LESS THAN(200009) SUBPARTITIONS 2,
PARTITION TEST_PART_200010 VALUES LESS THAN(200010) SUBPARTITIONS 2,
PARTITION TEST_PART_200011 VALUES LESS THAN(200011) SUBPARTITIONS 2,
PARTITION TEST_PART_MAX VALUES LESS THAN(MAXVALUE) SUBPARTITIONS 2
CREATE INDEX TEST_PART_IX_001 ON TEST_PART(C_NBR,LINE_ID);
Pls advice
Thanks in advance

Sorry for the confusion in the first part where I had given a RANGE PARTITION instead of HASH partition. Pls read as follows;
I have a table with 130,000,000 rows hash partitioned as below
----HASH PARTITION--
CREATE TABLE TEST_PART(
C_NBR CHAR(12),
YRMO_NBR NUMBER(6),
LINE_ID CHAR(2))
PARTITION BY HASH (C_NBR)
PARTITIONS 2
STORE IN (PCRD_MBR_MR_02, PCRD_MBR_MR_01);
CREATE INDEX TEST_PART_IX_001 ON TEST_PART(C_NBR,LINE_ID);
Data: -
INSERT INTO TEST_PART
VALUES ('2000',200001,'CM');
INSERT INTO TEST_PART
VALUES ('2000',200009,'CM');
INSERT INTO TEST_PART
VALUES ('2000',200010,'CM');
VALUES ('2006',NULL,'CM');
COMMIT;
Now, I need to keep this table from growing by deleting records that fall b/w a specific range of YRMO_NBR. I think it will be easy if I create a range partition on YRMO_NBR field and then create the current hash partition as a sub-partition.
How do I change the current partition of the table from hash partition to range partition and a sub-partition (hash) without losing the data and existing indexes?
The table after restructuring should look like the one below
COMPOSIT PARTITION-- RANGE PARTITION & HASH SUBPARTITION --
CREATE TABLE TEST_PART(
C_NBR CHAR(12),
YRMO_NBR NUMBER(6),
LINE_ID CHAR(2))
PARTITION BY RANGE (YRMO_NBR)
SUBPARTITION BY HASH (C_NBR) (
PARTITION TEST_PART_200009 VALUES LESS THAN(200009) SUBPARTITIONS 2,
PARTITION TEST_PART_200010 VALUES LESS THAN(200010) SUBPARTITIONS 2,
PARTITION TEST_PART_200011 VALUES LESS THAN(200011) SUBPARTITIONS 2,
PARTITION TEST_PART_MAX VALUES LESS THAN(MAXVALUE) SUBPARTITIONS 2
CREATE INDEX TEST_PART_IX_001 ON TEST_PART(C_NBR,LINE_ID);
Pls advice
Thanks in advance

Range Partitioning on Varchar2 column???

We hava table and it has a date column and its type is varchar2.
This column's format is '16021013' ('ddmmyyyy').
We want to make range partition on this column. What will be the best way?
do you think virtal column partitioning will be efficient?

>
I'm not a new DBA:-) You can be sure. I asked only about range partitioning trick with varchar2 column because we did our examination about this table. We will need to archive this table quarter by quarter to the other archive database. Then, off course, nearly all queries are coming firstly by using this date column and they can have different filtering inside "where" conditions. Already, this table has index on this column but with huge number of data, index performance is not enough for us. This is a 7x24 banking system and we are lately joined to this project. Because of this, we cant change everything like changing data type of that column after this moment.
>
You are taking things way too personally. No one said anything about whether you were, or were not, a DBA or made any other comments about your skill or abilities.
What we ask was for you to tell us WHAT the problem was that you were trying to solve and WHY you thought partitioning would solve it.
And now, after several generic posts, you have finally provided that information. We can only comment based on the information that you post. We can't guess as to what types of queries you use or what kinds of predicates you use in those queries. But we need to know that information in order to provide the best advice.
Next time you post put the important information in your original question:
1. A table column is VARCHAR2 but contains a date value. We are unable to change the datatype of this column.
2. We need to archive data quarterly based on this date value
3. Nearly all queries use this date value and then also may have additional filter conditions
4. This date column is indexed but we would like to improve the performance beyond what this index can give us.
The above is a summary that includes all important information that is needed to know how best to help you.
And I made a pretty good guess since two replies ago I provided you with example code that shows just how to partition the table.
>
Now, our only aim is how to make range partitioning this varchar2 date column.
>
As I showed you in my example code earlier you can add a virtual column to the table and partition on it. My example code creates a monthly partitioned table that allows you to archive by month or archive every three months to archive by quarter.
You can modify that example to use quarterly partitions if you want but I would recommend that you use standard monthly partitions since they will satisfy the widest range of predicates.

Alter range partition table to Interval partitioning table.

Hi DBA's,
I have a very big range partitioned table.
Recently we have upgraded our database to 11gR2 which has a feautre called interval partitioning.
Now i want to modify that existing range partitioned table to Interval Partitioning.
can we alter the range partitioned table to interval partitioning table?
I googled for the syntax but i didn't find it, can any one help[ me out on this?
Thanks.

If you ignore the "alter session set NLS_CALENDAR=PERSIAN;" during create/alter, everything else seems to work.
When you set the "alter session..." during inserts, the rows gets inserted into the correct partitions.
Only thing is when you look at HIGH_VALUE, you need to convert from the default GREGORIAN to PERSIAN.

Create range partition

hi ,
Oracle 10.2.0.1.0
I'm getting error while creating a range partition to already existing table (method employed : partition swap method ) .
PF screen shot of error
SQL> ed
Wrote file afiedt.buf
1 create table employee_details_temp partition by range (eid) (
2 partition eid_1r values less than (1000)
3 partition eid_2r values less than (20000)
4 partition eid_3r values less than (40000)
5 partition eid_3r values less than (maxvalue)
6* )
SQL> /
partition eid_2r values less than (20000)
ERROR at line 3:
ORA-14020: this physical attribute may not be specified for a table partitionalso ,
SQL> ed
Wrote file afiedt.buf
1 create table employee_details_temp partition by range (eid) (
2 partition eid_1r values less than (1000)
3 partition eid_2r values less than (20000)
4 partition eid_3r values less than (40000)
5 partition eid_3r values less than (maxvalue)
6 ) as select * from employee_details where 1=1;
7* /
SQL> /
partition eid_2r values less than (20000)
ERROR at line 3:
ORA-14020: this physical attribute may not be specified for a table partition please help .

answered .

How to find out the min & max partition_id in a range partition?

Hi we have a table set up by range partition
In the table creation script. It goes something like:
PARTITION PARTD_CUST_3_1_NEW VALUES LESS THAN ('39500')
so how we can find out this number '39500' from some of the data_dictionary view?
What we want to do is to set up parallel processing (do-it-yourself) based on partition.
So the number of parallel process will be based on this ID-range.
I can find out how many partitions are there by using something like this:
SELECT COUNT(*)
FROM all_tab_partitions WHERE table_owner='OWNER_NAME' AND table_name='TABLE_NAME'
We have 5 partitions now but the table structure can change in the near future even this table has moer than 130Million rows
I do not want to hardcode this "39500" just in case the table structure changes (partition structure changes)
Any idea ??

vxwo0owxv wrote:
Hi we have a table set up by range partition
In the table creation script. It goes something like:
PARTITION PARTD_CUST_3_1_NEW VALUES LESS THAN ('39500')
so how we can find out this number '39500' from some of the data_dictionary view?
What we want to do is to set up parallel processing (do-it-yourself) based on partition.
So the number of parallel process will be based on this ID-range.
I can find out how many partitions are there by using something like this:
SELECT COUNT(*)
FROM all_tab_partitions WHERE table_owner='OWNER_NAME' AND table_name='TABLE_NAME'
We have 5 partitions now but the table structure can change in the near future even this table has moer than 130Million rows
I do not want to hardcode this "39500" just in case the table structure changes (partition structure changes)
Any idea ??query DBA_TAB_PARTITIONS.HIGH_VALUE

Non-Partitioned Global Index on Range-Partitioned Table.

Hi All,
Is it possible to create Non-Partitioned Global Index on Range-Partitioned Table?
We have 4 indexes on CS_BILLING range-partitioned table, in which one is CBS_CLIENT_CODE(*local partitioned index*) and others are unknown types of index to me??
Means other 3 indexes are what type indexes ...either non-partitioned global index OR non-partitioned normal index??
Also if we create index as :(create index i_name on t_name(c_name)) By default it will create Global index. Please correct me......
Please help me in identifying other 3 indexes types by referring below ouputs!!!
select INDEX_NAME,TABLE_NAME,PARTITIONING_TYPE,LOCALITY from dba_part_indexes where TABLE_NAME='CS_BILLING';
INDEX_NAME TABLE_NAME PARTITI LOCALI
CSB_CLIENT_CODE CS_BILLING RANGE LOCAL
select index_name,index_type,table_name,table_type,PARTITIONED from dba_indexes where table_name='CS_BILLING';
INDEX_NAME INDEX_TYPE TABLE_NAME TABLE_TYPE PAR
CSB_CREATE_DATE NORMAL CS_BILLING TABLE NO
CSB_SUBMIT_ORDER NORMAL CS_BILLING TABLE NO
CSB_CLIENT_CODE NORMAL CS_BILLING TABLE YES
CSB_ORDER_NBR NORMAL CS_BILLING TABLE NO
select INDEX_OWNER,INDEX_NAME,TABLE_NAME,COLUMN_NAME from dba_ind_columns where TABLE_NAME='CS_BILLING';
INDEX_OWNER INDEX_NAME TABLE_NAME COLUMN_NAME
RPADMIN CSB_CREATE_DATE CS_BILLING CREATE_DATE
RPADMIN CSB_SUBMIT_ORDER CS_BILLING SUBMIT_TO_INVOICE
RPADMIN CSB_SUBMIT_ORDER CS_BILLING ORDER_NBR
RPADMIN CSB_CLIENT_CODE CS_BILLING CLIENT_CODE
RPADMIN CSB_ORDER_NBR CS_BILLING ORDER_NBR
select dip.index_name, dpi.locality, dip.partition_name, dip.status
from dba_part_indexes dpi, dba_ind_partitions dip
where dpi.table_name ='CS_BILLING'
and dpi.index_name = dip.index_name;
INDEX_NAME LOCALI PARTITION_NAME STATUS
CSB_CLIENT_CODE LOCAL CSB_2006_4Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2006_3Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2007_1Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2007_2Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2007_3Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2007_4Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2008_1Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2008_2Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2008_3Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2008_4Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2009_1Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2009_2Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2009_3Q USABLE
CSB_CLIENT_CODE LOCAL CSB_2009_4Q USABLE
select * from dba_part_indexes
where table_name ='CS_BILLING'
and locality = 'GLOBAL';
no rows selected
-Yasser
Edited by: YasserRACDBA on Mar 5, 2009 11:45 PM

Yaseer,
Is it possible to create Non-Partitioned and Global Index on Range-Partitioned Table?
Yes
We have 4 indexes on CS_BILLING range-partitioned table, in which one is CBS_CLIENT_CODE(*local partitioned index*) and others are unknown types of index to me??
Means other 3 indexes are what type indexes ...either non-partitioned global index OR non-partitioned normal index??
You got local index and 3 non-partitioned "NORMAL" b-tree tyep indexes
Also if we create index as :(create index i_name on t_name(c_name)) By default it will create Global index. Please correct me......
Above staement will create non-partitioned index
Here is an example of creating global partitioned indexes
CREATE INDEX month_ix ON sales(sales_month)
   GLOBAL PARTITION BY RANGE(sales_month)
      (PARTITION pm1_ix VALUES LESS THAN (2)
       PARTITION pm2_ix VALUES LESS THAN (3)
       PARTITION pm3_ix VALUES LESS THAN (4)
        PARTITION pm12_ix VALUES LESS THAN (MAXVALUE));Regards

NULL partition key in RANGE partition

All,
This is regarding partitioning a table using RANGE partition method. But the partition key contains null. How do I handle this situation? This is because there is no DEFAULT partition in RANGE partition though its present in LIST partition. Will rows with NULL partition key fall in MAXVALUE partition? Seeking your guidence.
Thanks,
...

NULLS would fit into the MAXVAL partition yes.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/partconc.htm#sthref2590
Thanks
Paul

How to Implement 30 days Range Partitioning with Date column. Not Interval

Hi,
I am using the db:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit
Current table structure is:
CREATE TABLE A
a NUMBER,
CreationDate DATE
PARTITION BY RANGE (CreationDate)
INTERVAL ( NUMTODSINTERVAL (30, 'DAY') )
(PARTITION P_FIRST
VALUES LESS THAN (TIMESTAMP ' 2001-01-01 00:00:00'))
How can I define virtual column based partitioning with RANGE partitioning without using INTERVAL partitioning.
And that is with Intervals of 30 days.
For monthly I am trying as
CREATE TABLE A
a NUMBER,
CreationDate DATE,
monthly_interval date as (to_char(CreationDate,'MM-YYYY')) VIRTUAL
PARTITION BY RANGE (monthly_interval)
partition p_AUG12 values less than (to_date('08-2012','mm-yyyy')),
partition p_SEP12 values less than (to_date('09-2012','mm-yyyy')),
partition p_OCT12 values less than (to_date('10-2012','mm-yyyy'))
Enable ROw Movement
BUT CAN'T INSERT the data even for that:
Insert into a (a, CreationDate)
Values (1, '12-10-2012')
Insert into a (a, CreationDate)
Values (1, '12-10-2012')
Please suggest..

Hi rp,
Interval Partitioned to Range. Created Daily Partitions from Monthly Part. got complicated so I am posting here.
Basically,
I know Interval Partitioning is a kind of Range partitioning. But explicitly for Interval Partitioned tables XML Indexes are not allowed as discussed here:
XMLIndexes on an Interval Partitioned Table??
I can do monthly partitions as :
CREATE TABLE A
a NUMBER,
CreationDate DATE,
monthly_interval varchar2(8) as (to_char(CreationDate,'MM-YYYY')) VIRTUAL
PARTITION BY RANGE (monthly_interval)
partition p_AUG12 values less than ('09-2012'),
partition p_SEP12 values less than ('10-2012'),
partition p_OCT12 values less than ('11-2012')
) Enable ROw Movement
Insert into a (a, CreationDate)
Values (1, '12-SEP-2012')
Insert into a (a, CreationDate)
Values (1, '14-SEP-2012')
Select * from A partition (p_SEP12)
Select * from A partition (p_AUG12)
Select * from A partition (p_OCT12)
Can we do it for 30 days partitions, instead of the monthly partitions. ANY suggestions..
Thanks..

Is there any plan of allowing non-range partitioning of spatial indexes

our application is really lacking the ability of spatial index being partitioned by list. We are binning information in our data warehouse by spatial locations, and when we query it (actually, MapViewer is generating a tile), entire geometry set is searched because table is list-partitioned and we cannot have local spatial index.

Hi,
I'm not in a position to answer the question about list partitioning, but would a pseudo-list partition implemented as a range partition work? For example, something like this:
CREATE TABLE customers (
first_name    VARCHAR2(20),
last_name     VARCHAR2(20),
address_1     VARCHAR2(20),
address_2     VARCHAR2(20),
city          VARCHAR2(20),
state_abrv    VARCHAR2(3),
postal_code   VARCHAR2(10),
customer_id   NUMBER NOT NULL UNIQUE)
PARTITION BY RANGE (state_abrv)
   PARTITION ALASKA         VALUES LESS THAN ('AKz'),
   PARTITION ALABAMA        VALUES LESS THAN ('ALz'),
   PARTITION ARKANSAS       VALUES LESS THAN ('ARz'),
   PARTITION AMERICANSAMOA VALUES LESS THAN ('ASz'),
   PARTITION ARIZONA        VALUES LESS THAN ('AZz'),
   PARTITION CALIFORNIA     VALUES LESS THAN ('CAz'),
   PARTITION WYOMING        VALUES LESS THAN ('WYz')
   );I've used this method in the past, although I agree a list partitioning solution is much preferred.
Dan

Problem with a 2 columns Range Partitioning for a indexed organized table

have an indexed organized table with a 2 column PK. the first field (datum) is a date field the second field (installatieid) is a number(2) field.
Every minute a 7 records are inserted (installatieid 0-6).
I like to partition this table with one partition per year per installatieid.
I tried to do it with:
partition by range(datum,installatieid)
(partition P_2004_0 values less than (to_date('2004-01,'yyyy-mm'),1)
,partition P_2004_6 values less than (to_date('2004-01','yyyy-mm'),7)
partition P_2005_0 values less than (to_date('2005-01','yyyy-mm'),1)
,partition P_2005_6 values less than (to_date('2005-01','yyyy-mm'),7)
but now only the P_2004_0 and P_2005_0 are filled.
I thought about to combine a range partition on datum with a list subpartition on installatieid, but I read this is not allowed with an index organized table.
How can I solve this problem.

partition by range(datum,installatieid)
(partition P_2004_0 values less than
(to_date('2004-01,'yyyy-mm'))
,partition P_2004_6 values less than
(to_date('2004-07','yyyy-mm'))
partition P_2005_0 values less than
(to_date('2005-01','yyyy-mm'))
,partition P_2005_6 values less than
(to_date('2005-07','yyyy-mm'))
? Sorry haven't got time to test it this morning ;0)

Partition Pruning on Interval Range Partitioned Table not happening when SYSDATE used in Where Clause

We have tables that are interval range partitioned on a DATE column, with a partition for each day - all very standard and straight out of Oracle doc.
A 3rd party application queries the tables to find number of rows based on date range that is on the column used for the partition key.
This application uses date range specified relative to current date - i.e. for last two days would be "..startdate > SYSDATE -2 " - but partition pruning does not take place and the explain plan shows that every partition is included.
By presenting the query using the date in a variable partition pruning does table place, and query obviously performs much better.
DB is 11.2.0.3 on RHEL6, and default parameters set - i.e. nothing changed that would influence optimizer behavior to something unusual.
I can't work out why this would be so. It very easy to reproduce with simple test case below.
I'd be very interested to hear any thoughts on why it is this way and whether anything can be done to permit the partition pruning to work with a query including SYSDATE as it would be difficult to get the application code changed.
Furthermore to make a case to change the code I would need an explanation of why querying using SYSDATE is not good practice, and I don't know of any such information.
1) Create simple partitioned table
CREATETABLE part_test
   (id                      NUMBER NOT NULL,
    starttime               DATE NOT NULL,
    CONSTRAINT pk_part_test PRIMARY KEY (id))
PARTITION BY RANGE (starttime) INTERVAL (NUMTODSINTERVAL(1,'day')) (PARTITION p0 VALUES LESS THAN (TO_DATE('01-01-2013','DD-MM-YYYY')));
2) Populate table 1million rows spread between 10 partitions
BEGIN
    FOR i IN 1..1000000
    LOOP
        INSERT INTO part_test (id, starttime) VALUES (i, SYSDATE - DBMS_RANDOM.value(low => 1, high => 10));
    END LOOP;
END;
EXEC dbms_stats.gather_table_stats('SUPER_CONF','PART_TEST');
3) Query the Table for data from last 2 days using SYSDATE in clause
EXPLAIN PLAN FOR
SELECT count(*)
FROM    part_test
WHERE   starttime >= SYSDATE - 2;
| Id | Operation                 | Name      | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT          |           |     1 |     8 | 7895 (1)| 00:00:01 |       |       |
|   1 | SORT AGGREGATE           |           |     1 |     8 |            |          |       |       |
|   2 |   PARTITION RANGE ITERATOR|           |   111K|   867K| 7895   (1)| 00:00:01 |   KEY |1048575|
|* 3 |    TABLE ACCESS FULL      | PART_TEST |   111K|   867K| 7895   (1)| 00:00:01 |   KEY |1048575|
Predicate Information (identified by operation id):
   3 - filter("STARTTIME">=SYSDATE@!-2)
4) Now do the same query but with SYSDATE - 2 presented as a literal value.
This query returns the same answer but very different cost.
EXPLAIN PLAN FOR
SELECT count(*)
FROM part_test
WHERE starttime >= (to_date('23122013:0950','DDMMYYYY:HH24MI'))-2;
| Id | Operation                 | Name      | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT          |           |     1 |     8 |   131 (0)| 00:00:01 |       |       |
|   1 | SORT AGGREGATE           |           |     1 |     8 |            |          |       |       |
|   2 |   PARTITION RANGE ITERATOR|           |   111K|   867K|   131   (0)| 00:00:01 |   356 |1048575|
|* 3 |    TABLE ACCESS FULL      | PART_TEST |   111K|   867K|   131   (0)| 00:00:01 |   356 |1048575|
Predicate Information (identified by operation id):
   3 - filter("STARTTIME">=TO_DATE(' 2013-12-21 09:50:00', 'syyyy-mm-dd hh24:mi:ss'))
thanks in anticipation
Jim

As Jonathan has already pointed out there are situations where the CBO knows that partition pruning will occur but is unable to identify those partitions at parse time. The CBO will then use a dynamic pruning which means determine the partitions to eliminate dynamically at run time. This is why you see the KEY information instead of a known partition number. This is to occur mainly when you compare a function to your partition key i.e. where partition_key = function. And SYSDATE is a function. For the other bizarre PSTOP number (1048575) see this blog
http://hourim.wordpress.com/2013/11/08/interval-partitioning-and-pstop-in-execution-plan/
Best regards
Mohamed Houri

Range Partitioning a table. Max value to be defined

Hi,
I am using a range partitioned table, range partitioned on date, and have defined max value as 6 months after the Creation Date.
I have a proc which creates the partitions I want in advance by splitting up the max partition.
- Now what do I do when max partition is reached after 6 months?
- If I define max partition one year or two year after the current date instead of the currently defined 6 months after creation date. What are the negatives attached with it?
I can't use Interval Partition and have to use Range only.
Kindly suggest.
Thanks..

>
I am using a range partitioned table, range partitioned on date, and have defined max value as 6 months after the Creation Date.
I have a proc which creates the partitions I want in advance by splitting up the max partition.
- Now what do I do when max partition is reached after 6 months?
- If I define max partition one year or two year after the current date instead of the currently defined 6 months after creation date. What are the negatives attached with it?
>
Any data with a partition key that does NOT match any partition will cause your INSERT query to fail.
Any partition that has no data to match it will simply remain empty.
A common partitioning scheme is to define one partition for all old data, one partition with a high max value and then split the max value partition to get the partitions you want in the middle.
Let's say you want monthly partitions but don't have that much data from before the current year, 2012.
1. Create one partition for dates < 1/1/2012
2. One partition each for the 12 months of 2012
3. One max value partition to be 1/1/4000
You would just split the max value partition to create each month of 2013. The split could be done ahead of time or a month at a time as you choose.
The only negative is that any data inserted by mistake that has a super-high date will go into the max value partition. But that is going to happen anyway. If you accidentally enter a date of 3/23/3882 it won't be rejected.
But it is easy to query periodically to see if you have any 'bad' data like that. And the alternative is that an INSERT would fail because of the one bad record and all of your good data would be rejected anyway so it's not really much of a negative.
Remember - for best management performance each partition should have its own tablespace and the indexes should all be local if possible.

Oracle 11g List - Range Partition - Help Needed

Hi All,
I want to create a composite partition (LIST-RANGE) but RANGE partition should using interval partition
This is my query .
CREATE TABLE "DMSDB"."DEVICE_UTILS"
(     "ULID" VARCHAR2(100 CHAR),
     "IP_ADDRESS" VARCHAR2(24 CHAR),
     "PORT" VARCHAR2(8 CHAR),
     "SHUTDOWN" NUMBER(10,0),
     "LINE_TYPE" NUMBER(10,0) DEFAULT '0',
     "OCCUPIED" NUMBER(10,0),
     "UTILIZATION" NUMBER(10,0),
     "IDLE_TIME" VARCHAR2(32 CHAR),
     "ACTIVATION_TIME" VARCHAR2(32 CHAR),
     "PULLED_DATE" TIMESTAMP (6) DEFAULT SYSDATE,
     "ACCESS_TIME" TIMESTAMP (6) DEFAULT SYSDATE
PARTITION BY LIST(ULID)
          PARTITION PART_DEVUTILS_ULID VALUES (DEFAULT)
     SUBPARTITION BY RANGE( PULLED_DATE)
     PARTITION PART_DEVUTILS_WEEK INTERVAL (NUMTOYMINTERVAL(1,'WEEK'))
Somehow its not working. can you please suggest where i am making mistake?

Interval partitioning is not supported at the subpartition level.
http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_7002.htm#BABCDDIA
Regards
Girish Sharma

Modifying a Range Partition

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