How do you move a LOB segment?

How do you move a LOB segment?

How to move lob segment to another tablespace

1. Follow below steps from moving lob segment from one tablespace to another.
2. SQL> alter table DBACLASS.
3. SQL> select table_name,COLUMN_NAME,SEGMENT_NAME,TABLESPACE_NAME from dba_lobs where OWNER=’DBACLASS’;

How do you move a table with a LOB column?

Moving oracle tables with lob columns to another tablespace

1. Move table.
2. Rebuild indexes (and move them to the new tablespace if you wish so)
3. Move the lob segment.
4. Enable row movement.
5. Shrink the table and lob segment.

What is LOB tablespace?

LOB table spaces (also known as large object or auxiliary table spaces) hold LOB data, such as graphics, video, or large text strings. If your data does not fit entirely within a data page, you can define one or more columns as LOB columns. LOB objects can do more than store large object data.

How do you reclaim a space LOB segment?

Reclaim unused rows by running the following command: ALTER TABLE SHRINK SPACE; Reclaim unused LOB columns by running the following command: ALTER TABLE MODIFY LOB () (SHRINK SPACE);

How do I defrag a lob in Oracle?

In order to defragment the SecureFiles LOBs, we need to use the shrink_clause. The shrink_clause lets us (in general) manually shrink space in a table, index-organized table or its overflow segment, index, partition, subpartition, LOB segment, materialized view, or materialized view log.

What is Alter table move in Oracle?

The move_table_clause lets you relocate data of a nonpartitioned table or of a partition of a partitioned table into a new segment, optionally in a different tablespace, and optionally modify any of its storage attributes.

How do I move LOB data to another tablespace?

Move Lob Segment to Another Tablespace in Oracle You can move any lob segment to another tablespace as follows. ALTER TABLE OWNER. TABLE_NAME MOVE LOB(LOB_COLUMN) STORE AS (TABLESPACE NEW_TABLESPACE_NAME);

How do you move a table with long data types?

SQL> ALTER TABLE TABLE_CLOB MOVE LOB(DATA) STORE AS (TABLESPACE SYSTEM); Table altered….Solution:-

1. Export the table having column as LONG datatype using datapump.
2. drop the table.
3. Import the table again with remap_tablespace parameter using impdp. I hope this article helped you.

What is Oracle LOB?

Large Objects (LOBs) are a set of datatypes that are designed to hold large amounts of data. A LOB can hold up to a maximum size ranging from 8 terabytes to 128 terabytes depending on how your database is configured. Storing data in LOBs enables you to access and manipulate the data efficiently in your application.

What is Oracle Pctversion?

PCTVERSION is the percentage of all used LOB data space that can be occupied by old versions of LOB data pages. As soon as old versions of LOB data pages start to occupy more than the PCTVERSION amount of used LOB space, Oracle tries to reclaim the old versions and reuse them.

How do you move a LOB segment to another tablespace?

How do you find the table name for the LOB segment?

To get the details of the table to which this LOB segment belong to: SELECT TABLE_NAME, COLUMN_NAME FROM DBA_LOBS WHERE OWNER = ” AND SEGMENT_NAME= ” ; The first thing to do would be to check the space that is actually allocated to the LOB data.