How to move lobsegment and lobindex to a different Tablespace

Question

Oracle Version: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit
Os: Solaris 10
Hello Everybody,
I want to move a lobsegment and a lobindex to a differrent tablespace.
But when i am executing the following statement in order to move the LOBINDEX I am getting the errors listed below:
SQL> ALTER INDEX SYS_IL0000012358C00008$$ REBUILD TABLESPACE INDX;
ALTER INDEX SYS_IL0000012358C00008$$ REBUILD TABLESPACE INDX
ERROR at line 1:
ORA-02327: cannot create index on expression with datatype LOB
Is there any differrent commands/methods of moving the LOBSEGMENT/LOBINDEX to a differrent tablespace.
Any help Appreciated..
Regards,
Prosenjit Mukherjee.

Answer 1

Hi,
Assuming that I have table "TEST" in USERS TableSpace
CREATE TABLE TEST
TEST_ID NUMBER NOT NULL,
TEST_NAME CLOB,
CONSTRAINT PK_TEST PRIMARY KEY(TEST_ID)
SQL> ALTER TABLE TEST MOVE TABLESPACE EXAMPLE;
Above command will move the table to new tablespace but will not move the CLOB segment and it will still be in original tablespace. This is because LOB data is stored outside of the table.
Check the tablespace of the CLOB column by issuing following sql.
SQL> SELECT index_name, tablespace_name
FROM user_indexes WHERE table_name = ‘TEST’;
INDEX_NAME TABLESPACE_NAME
SYS_IL0000073575C00002$$ USERS
In order to move CLOB column to different tablespace, we have to issue following command.
SQL> ALTER TABLE TEST MOVE LOB(TEST_NAME) STORE AS (TABLESPACE EXAMPLE);
In above example, TEST_NAME is the CLOB column which we want to move to new tablespace and EXAMPLE is target tablespace. Above command will successfully move LOB segments to the new tablespace. We can verify it by issuing same sql again.
SQL> SELECT index_name, tablespace_name
FROM user_indexes WHERE table_name = ‘TEST’;
INDEX_NAME TABLESPACE_NAME
SYS_IL0000073575C00002$$ EXAMPLE
- Pavan Kumar N