Problems Faced with Partitions in Oracle 9i.

Question

I have a doubt regarding the partitions in Oracle 9i can you please help me regarding this?
Create table t1
( x number,
y number,
z number);
insert into t1 values (1,1,1);
insert into t1 values (2,2,2);
insert into t1 values (3,3,3);
Create table t2
x number,
y number,
z number
partition by range(x)
partition p1 values less than(2),
partition p2 values less than(3),
partition p3 values less than(4),
partition p4 values less than(maxvalue)
alter table t2 exchange partition p1 with table t1;
SQL> alter table t2 exchange partition p1 with table t1;
alter table t2 exchange partition p1 with table t1
ERROR at line 1:
ORA-14099: all rows in table do not qualify for specified partition
WHAT DOES THIS ERROR MESSAGE MEAN? I AM NOT ABLE TO UNDERSTAND THIS? WHAT NEED's TO BE DONE TO RESOLVE THIS?
alter table t2 exchange partition p1 with table t1 WITHOUT VALIDATION;
SQL> SELECT * FROM T2;
X Y Z
1 1 1
2 2 2
3 3 3
SQL> SELECT * FROM T2 PARTITION(P1);
X Y Z
1 1 1
2 2 2
3 3 3
SQL> SELECT * FROM T2 PARTITION(P2);
no rows selected
SQL> SELECT * FROM T2 PARTITION(P3);
no rows selected
(i) Why i am facing this error ORA-14099: while partitioning? Can you please brief me about this ?
(ii) why there is not data's in the PARTITIONS p2 &p3 after the partitions is exchanged WITHOUT VALIDATION options?
what is going with this method?
(iii) Also can you please explain me with an example how to partitions a table having milliion of records with EXCHANGE PARTITION Options with MULITPLE partition segment's (say partition based on status id column with 6 differnt values i am thinking to use list partitions using status_id as partition key) ?
Also i have tried the below approch is this a right approch? please correct me if i am wrong.
Create table t1
( x number,
y number,
z number);
insert into t1 values (1,1,1);
insert into t1 values (2,2,2);
insert into t1 values (3,3,3);
commit;
Create table t2
x number,
y number,
z number
partition by range(x)
partition p1 values less than(2),
partition p2 values less than(3),
partition p3 values less than(4),
partition p4 values less than(maxvalue)
SQL> insert into t2 select * from t1;
3 rows created.
SQL> commit;
Commit complete.
SQL> SELECT * FROM T2 PARTITION(P1);
X Y Z
1 1 1
SQL> SELECT * FROM T2 PARTITION(P2);
X Y Z
2 2 2
SQL> SELECT * FROM T2 PARTITION(P3);
X Y Z
3 3 3
SQL> SELECT * FROM T2 PARTITION(P4);
no rows selected
EXPLAIN PLAN
FOR SELECT * FROM T2 WHERE X = 1
| Id | Operation | Name | Rows | Bytes | Cost | Pstart| Pstop |
| 0 | SELECT STATEMENT | | 1 | 9 | 2 | | |
| 1 | TABLE ACCESS FULL | T2 | 1 | 9 | 2 | 1 | 1 |
Now my question is what is problem instead of using EXCHANGE PARTITION why caun't we follow this above approch?
to partition a non-partitioned table?
Thanks,
Rajesh.

Answer 1

The value of 3 should obviously should go into the partition P3.Then why are you putting it into p1?
Your command,
<tt>    alter table t2 exchange partition <b>p1</b> with table t1;</tt>
will swap partition p1 with the contents of table t1, leaving you with partition p1 containing the three values that were in t1. At first it told you there were rows in t1 that did not belong in that partition, but you used FORCE so it put them in anyway.
btw there are notes in the FAQ about how to use ** tags to format your posts.
~Edited by: William Robertson on Oct 15, 2008 6:49 AM~