How To Move Or Rebuild A Lob Partition [ID 761388.1]
改动时间 29-JUN-2010 类型 HOWTO 状态 MODERATED In this Document Goal Solution References Platforms: 1-914CU; This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) process and therefore has not been subject to an independent technical review. Applies to: Oracle Server - Enterprise Edition - Version: 9.2.0.8 to 11.1.0.7 - Release: 9.2 to 11.1 Information in this document applies to any platform. Goal How to move or rebuild a LOB partition since if use traditional syntax, it will fail. SQL> alter table SHOW_LOB_STORAGE move lob(DDD) 2 store as (tablespace PARTFORLOB03); alter table SHOW_LOB_STORAGE move lob(DDD) * ERROR at line 1: ORA-14511: cannot perform operation on a partitioned objectSolution
The syntax to move a LOB partition is the following. alter table <table name> move partition <table partition name> lob (<lob column name>) store as <optional lob partition name> (tablespace <lob tablespace name>); -or- alter table <table name> move partition <table partition name> lob (<lob column name>) store as (tablespace <lob tablespace name>); A working example. SQL> connect testlob/testlob Connected. 1. Create a partitioned table that contains a LOB. SQL> create table show_lob_storage 2 (aaa number(5), 3 bbb varchar2(10), 4 ccc number(5), 5 ddd CLOB ) 6 PARTITION BY RANGE(aaa) 7 (PARTITION p1 VALUES LESS THAN (50) tablespace part01 8 LOB (ddd) STORE AS (tablespace partforlob01), 9 PARTITION p2 VALUES LESS THAN (100) tablespace part02 10 LOB (ddd) STORE AS (tablespace partforlob02), 11 PARTITION p3 VALUES LESS THAN (MAXVALUE) tablespace part03 12 LOB (ddd) STORE AS (tablespace partforlob03)); Table created. 2. Show objects created on DB from above SQL. SQL> set pagesize 10000 SQL> col segment_name format a25 SQL> col segment_type format a16 SQL> col tablespace_name format a13 SQL> col partition_name format a15 SQL> select segment_name, segment_type, tablespace_name, 2 partition_name from user_segments 3 order by segment_name, partition_name; SEGMENT_NAME SEGMENT_TYPE TABLESPACE_NA PARTITION_NAME ------------------------- ---------------- ------------- --------------- SHOW_LOB_STORAGE TABLE PARTITION PART01 P1 SHOW_LOB_STORAGE TABLE PARTITION PART02 P2 SHOW_LOB_STORAGE TABLE PARTITION PART03 P3 SYS_IL0000054529C00004$$ INDEX PARTITION PARTFORLOB01 SYS_IL_P150 SYS_IL0000054529C00004$$ INDEX PARTITION PARTFORLOB02 SYS_IL_P151 SYS_IL0000054529C00004$$ INDEX PARTITION PARTFORLOB03 SYS_IL_P152 SYS_LOB0000054529C00004$$ LOB PARTITION PARTFORLOB01 SYS_LOB_P147 SYS_LOB0000054529C00004$$ LOB PARTITION PARTFORLOB02 SYS_LOB_P148 SYS_LOB0000054529C00004$$ LOB PARTITION PARTFORLOB03 SYS_LOB_P149 9 rows selected. 3. Show the partition name corresponding to each LOB partition. SQL> select partition_name, lob_partition_name, tablespace_name 2 from user_lob_partitions where table_name = 'SHOW_LOB_STORAGE'; PARTITION_NAME LOB_PARTITION_NAME TABLESPACE_NA --------------- ------------------------------ ------------- P1 SYS_LOB_P147 PARTFORLOB01 P2 SYS_LOB_P148 PARTFORLOB02 P3 SYS_LOB_P149 PARTFORLOB03 4. Move LOB partition SYS_LOB_P147 to tablespace PARTFORLOB3. SQL> alter table SHOW_LOB_STORAGE move partition P1 tablespace PART01 2 lob(DDD) store as SYS_LOB_P147 (tablespace PARTFORLOB03); Table altered. 5. Show location of LOB partition after the move. SQL> select partition_name, lob_partition_name, tablespace_name 2 from user_lob_partitions where table_name = 'SHOW_LOB_STORAGE'; PARTITION_NAME LOB_PARTITION_NAME TABLESPACE_NA --------------- ------------------------------ ------------- P1 SYS_LOB_P147 PARTFORLOB03 P2 SYS_LOB_P148 PARTFORLOB02 P3 SYS_LOB_P149 PARTFORLOB03 6. Show the LOB index partition followed the LOB partition to new tablespace. SQL> select partition_name, tablespace_name, status from user_ind_partitions; PARTITION_NAME TABLESPACE_NA STATUS --------------- ------------- -------- SYS_IL_P151 PARTFORLOB02 USABLE SYS_IL_P152 PARTFORLOB03 USABLE SYS_IL_P154 PARTFORLOB03 USABLE 7. Syntax if just want to rebuild a LOB partition on the existing tablespace. SQL> alter table SHOW_LOB_STORAGE move partition P2 2 lob(DDD) store as (tablespace PARTFORLOB02); Table altered.