How to move the lob segment in a partitioned table

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• move the lob segment fails with invalid identifier

  Why this fails:
  
  SQL > desc APPLSYS. WF_INBOUND_TABLE
  Name Null? Type
  ----------------------------------------- -------- ----------------------------
  Q_NAME VARCHAR2 (30)
  MSGID NOT NULL RAW (16)
  CORRID'ART VARCHAR2 (128)
  PRIORITY NUMBER
  NUMBER OF THE STATE
  TIMESTAMP DELAY (6)
  NUMBER OF EXPIRY
  TIME_MANAGER_INFO TIMESTAMP (6)
  NUMBER OF LOCAL_ORDER_NO
  NUMBER OF CHAIN_NO
  NUMBER OF THE CSCN
  DSCN NUMBER
  ENQ_TIME TIMESTAMP (6)
  NUMBER OF ENQ_UID
  ENQ_TID VARCHAR2 (30)
  DEQ_TIME TIMESTAMP (6)
  NUMBER OF DEQ_UID
  DEQ_TID VARCHAR2 (30)
  NUMBER OF RETRY_COUNT
  EXCEPTION_QSCHEMA VARCHAR2 (30)
  EXCEPTION_QUEUE VARCHAR2 (30)
  NUMBER OF STEP_NO
  NUMBER OF RECIPIENT_KEY
  DEQUEUE_MSGID RAW (16)
  USER_DATA SYSTEM. WF_PAYLOAD_T
  SENDER_NAME VARCHAR2 (30)
  SENDER_ADDRESS VARCHAR2 (1024)
  NUMBER OF SENDER_PROTOCOL
  ANYDATA USER_PROP
  
  
  SQL > alter table APPLSYS. WF_INBOUND_TABLE move TABLESPACE APPS_TS_TX_DATA;
  
  Modified table.
  
  SQL > ALTER TABLE APPLSYS. WF_INBOUND_TABLE MOVE LOB (USER_PROP) STORE DID (TABLESPACE APPS_TS_TX_DATA);
  *
  ERROR on line 1:
  ORA-00904: "USER_PROP": invalid identifier

  user600570 wrote:
  Well, no matter what the type is be, how to move to this segment?

  The segment does not move when the corresponding table is moved to new tablespace?
  At least that's what I see.

  SQL> select * from v$version ;
  
  BANNER
  ----------------------------------------------------------------
  Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
  PL/SQL Release 10.2.0.4.0 - Production
  CORE     10.2.0.4.0     Production
  TNS for Solaris: Version 10.2.0.4.0 - Production
  NLSRTL Version 10.2.0.4.0 - Production
  
  SQL> create table t nologging as select * from applsys.wf_inbound_table where 1 = 2 ;
  
  Table created.
  
  SQL> select dbms_metadata.get_ddl('TABLE','T') from dual ;
  
  DBMS_METADATA.GET_DDL('TABLE','T')
  --------------------------------------------------------------------------------
  
    CREATE TABLE "APPS"."T"
     (     "Q_NAME" VARCHAR2(30),
       "MSGID" RAW(16),
       "CORRID" VARCHAR2(128),
       "PRIORITY" NUMBER,
       "STATE" NUMBER,
       "DELAY" TIMESTAMP (6),
       "EXPIRATION" NUMBER,
       "TIME_MANAGER_INFO" TIMESTAMP (6),
       "LOCAL_ORDER_NO" NUMBER,
       "CHAIN_NO" NUMBER,
       "CSCN" NUMBER,
       "DSCN" NUMBER,
       "ENQ_TIME" TIMESTAMP (6),
       "ENQ_UID" NUMBER,
       "ENQ_TID" VARCHAR2(30),
       "DEQ_TIME" TIMESTAMP (6),
       "DEQ_UID" NUMBER,
       "DEQ_TID" VARCHAR2(30),
       "RETRY_COUNT" NUMBER,
       "EXCEPTION_QSCHEMA" VARCHAR2(30),
       "EXCEPTION_QUEUE" VARCHAR2(30),
       "STEP_NO" NUMBER,
       "RECIPIENT_KEY" NUMBER,
       "DEQUEUE_MSGID" RAW(16),
       "USER_DATA" "SYSTEM"."WF_PAYLOAD_T" ,
       "SENDER_NAME" VARCHAR2(30),
       "SENDER_ADDRESS" VARCHAR2(1024),
       "SENDER_PROTOCOL" NUMBER,
       "USER_PROP" "SYS"."ANYDATA"
     ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS NOLOGGING
    STORAGE(INITIAL 40960 NEXT 40960 MINEXTENTS 1 MAXEXTENTS 505
    PCTINCREASE 50 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
    TABLESPACE "APPLSYSD"
   OPAQUE TYPE "USER_PROP" STORE AS LOB (
    ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10
    CACHE
    STORAGE(INITIAL 40960 NEXT 40960 MINEXTENTS 1 MAXEXTENTS 505
    PCTINCREASE 50 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT))
  
  SQL> select owner, table_name, column_name, segment_name, tablespace_name from dba_lobs
    2  where table_name = 'T' ;
  
  OWNER                          TABLE_NAME
  ------------------------------ ------------------------------
  COLUMN_NAME
  -----------------------------------------------------------------------------------------------------------------------------------
  SEGMENT_NAME                   TABLESPACE_NAME
  ------------------------------ ------------------------------
  APPS                           T
  USER_PROP
  SYS_LOB0000365381C00035$$      APPLSYSD
  
  SQL> alter table t move tablespace APPLSYSX ;
  
  Table altered.
  
  SQL> select dbms_metadata.get_ddl('TABLE','T') from dual ;
  
  DBMS_METADATA.GET_DDL('TABLE','T')
  --------------------------------------------------------------------------------
  
    CREATE TABLE "APPS"."T"
     (     "Q_NAME" VARCHAR2(30),
       "MSGID" RAW(16),
       "CORRID" VARCHAR2(128),
       "PRIORITY" NUMBER,
       "STATE" NUMBER,
       "DELAY" TIMESTAMP (6),
       "EXPIRATION" NUMBER,
       "TIME_MANAGER_INFO" TIMESTAMP (6),
       "LOCAL_ORDER_NO" NUMBER,
       "CHAIN_NO" NUMBER,
       "CSCN" NUMBER,
       "DSCN" NUMBER,
       "ENQ_TIME" TIMESTAMP (6),
       "ENQ_UID" NUMBER,
       "ENQ_TID" VARCHAR2(30),
       "DEQ_TIME" TIMESTAMP (6),
       "DEQ_UID" NUMBER,
       "DEQ_TID" VARCHAR2(30),
       "RETRY_COUNT" NUMBER,
       "EXCEPTION_QSCHEMA" VARCHAR2(30),
       "EXCEPTION_QUEUE" VARCHAR2(30),
       "STEP_NO" NUMBER,
       "RECIPIENT_KEY" NUMBER,
       "DEQUEUE_MSGID" RAW(16),
       "USER_DATA" "SYSTEM"."WF_PAYLOAD_T" ,
       "SENDER_NAME" VARCHAR2(30),
       "SENDER_ADDRESS" VARCHAR2(1024),
       "SENDER_PROTOCOL" NUMBER,
       "USER_PROP" "SYS"."ANYDATA"
     ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS NOLOGGING
    STORAGE(INITIAL 40960 NEXT 40960 MINEXTENTS 1 MAXEXTENTS 505
    PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
    TABLESPACE "APPLSYSX"
   OPAQUE TYPE "USER_PROP" STORE AS LOB (
    ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10
    CACHE
    STORAGE(INITIAL 40960 NEXT 40960 MINEXTENTS 1 MAXEXTENTS 505
    PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT))
  
  SQL> select owner, table_name, column_name, segment_name, tablespace_name from dba_lobs
    2  where table_name = 'T' ;
  
  OWNER                          TABLE_NAME
  ------------------------------ ------------------------------
  COLUMN_NAME
  -----------------------------------------------------------------------------------------------------------------------------------
  SEGMENT_NAME                   TABLESPACE_NAME
  ------------------------------ ------------------------------
  APPS                           T
  USER_PROP
  SYS_LOB0000365381C00035$$      APPLSYSX
  
  SQL> drop table t purge ;
  
  Table dropped.
  

  If you want to be able to move the segment to a different tablespace to the table, I guess that's not possible. Oracle only allows LOB to be stored in a separate tablespace as the corresponding table provided that they are defined as the LOBs explicitly during the creation of the table, unlike the LOB created by oracle internally because of the column datatype being ANYDATA as in this case.

• Calculate the free space of the lob segment / reclaim space?

  Friends...

  DB: 11 GR 2

  OS: Linux

  I am trying shrink lob segment and recover the free space between the business segments.

  This area in Oracle DB is new to me so try to learn and to shrink the segment.

  I went through various metalink doco (386341.1) but not be able to get answers for below...

  Issues related to the:

  1. how much free space is available in the lob segment?

  2 can I assume 'no LOB DATA' as the free space currently and even will be recovered once the segment will be shrunk?

  3. no disadvantage of using "ALTER TABLE... SHRINK SPACE.

  4. is it true if storage segment is 100 GB as many redo will be generated when trying to alter table... shrink the space?

  I'm following the steps below.

  1 find Segment name-> sys_lob123

  2. find the size of storage - > 100 GB

  3. find the size of the LOB data-> 70

  4. find the size of the data not LOB-> 30

  2. the storage size

  Select 'storage' from dba_extents bytes

  where nom_segment = 'sys_lob123. '

  100 GB

  3. the size of the LOB

  Select dbms_lob.getlength (col_lob) in the table_lob;

  70 GB

  4. the size of the LOB data not

  100-70 = 30 GB (i.e. #3 - #2)

  Thanks in advance and enjoy your time looking into this...

  Use DBMS_REDEFINITION to reorganize the LOB segment, it is the best way to retrieve a LOB segment space. Also use the clause "MEANS of COMPRESS" and SECURE LEADER, creating the temp table. There is no reason that you can use the BASIC FILE. It's online process, which means that your app can stay up to... However, make sure that monitor you the database when executing redef, as it can cause conflicts and slow down your application, in which case you must kill the reorg...

  If this process is not feasible or overwhelms you, "ALTER TABLE MOVE" is another option.

  With 'Displacement of Alter table', you need to rebuild all indexes after you move the LOB segment. Don't forget this is an offline process and your application needs a time out while you do this.

  Here is the query to list the 10 LOBs albums in your database-

  fixed line 160

  Col a20 PROPRIETARY format

  Col TABLE_NAME format a30

  Col COLUMN_NAME format a30

  Col nom_segment format a30

  size col 999 999 999 format

  SELECT *.

  FROM (SELECT b.owner,

  b.table_name,

  b.column_name,

  a.segment_name,

  SUM (a.bytes) / (1024 * 1024) "size".

  FROM dba_segments a, b dba_lobs

  WHERE a.segment_name LIKE '% SYS_LOB '.

  AND a.segment_name = b.segment_name

  AND a.owner NOT IN ('SYS', 'SYSTEM', 'GENERAL', "OUTLN")

  B.owner GROUP,

  b.table_name,

  b.column_name,

  a.segment_name

  ORDER BY DESC 5)

  WHERE ROWNUM<>

• Displacement of the LOB segments.

  Is there a a way to move LOB segment, keeping the segment of the table? The statement:

  ALTER table < tab > move lob (< lob >) store as (tablespace < TBS >)

  moves not only the LOB segment, but also table segments, so consumes a lot of resources, needs to rebuild indexes etc.

  Thank you.

  If you move the lob segment, then the data of the line must change because the lob is in a different place. There is no way around that. The row stores a pointer to LOB. Oracle has decided to implement this in a way that makes all change of rowid (you can't influence that).

  So, as I said - it's life.

• Move the LOB to a new tablespace

  I want the users tablespace LOB to some other tablespace. But when I tried I got the error set-aside. I moved all the objects corresponding to the particular schema, but not the LOB. Can you please explain why Cant I move the LOB. And if you can explain that I want to know the importance of the lob indexex. Thank you in advance.
  
  SQL > select TABLE_NAME, INDEX_NAME, TABLESPACE_NAME from dba_lobs where owner = 'PC_DOM ';
  
  TABLESPACE_NAME INDEX_NAME TABLE_NAME
  ------------------------------ ------------------------------ ------------------------------
  PCSF_DOMAIN SYS_IL0000077924C00002$ $ USERS
  PCSF_CPU_USAGE_SUMMARY SYS_IL0000077933C00006$ $ USERS
  PCSF_REPO_USAGE_SUMMARY SYS_IL0000077936C00005$ $ USERS
  PCSF_USER SYS_IL0000077940C00002$ $ USERS
  PCSF_GROUP SYS_IL0000077944C00002$ $ USERS
  PCSF_ROLE SYS_IL0000077948C00002$ $ USERS
  PCSF_DOMAIN_USER_PRIVILEGE SYS_IL0000077952C00002$ $ USERS
  PCSF_DOMAIN_GROUP_PRIVILEGE SYS_IL0000077956C00002$ $ USERS
  
  8 selected lines.
  
  SQL > alter table PCSF_DOMAIN move lob (SYS_IL0000077924C00002$) store as (tablespace TS_PC_DOM);
  ALTER table PCSF_DOMAIN move lob (SYS_IL0000077924C00002$) store as (tablespace TS_PC_DOM)
  *
  ERROR on line 1:
  ORA-00942: table or view does not exist

  Do not use segment name of LOB but about the name of the column in the table and qualify the name of the table with the owner of the table if you are not logged in as owner of the table:

  Try:

  alter table PC_DOM.PCSF_DOMAIN move lob () store as ( tablespace TS_PC_DOM );
  

  Each LOB column is materialized with 2 segments:
  -a LOB segment containing LOB data
  -a LOB index that is a structure designed to facilitate access to the LOB data in the LOB segment.

  Edited by: P. Forstmann on 22 July. 2011 20:48

  Edited by: P. Forstmann on 22 July. 2011 20:52

• How to move a LOB to a different tablespace

  Hello
  I have a PRODUCT table where one of its fields is a LOB.
  The table has been created the TBL1 tablespace and Lob his field to a tablespace dedicad TBL_LB1
  I have to move the table to a different tablespace.
  The statement that I would use is
  
  ALTER TABLE PRODUCT MOVE TABLESPACE storage TBL2 (initial then the 4M 4 M);
  
  Can you tell me how to write the statement to move the Lob field to the new tablespace TBL_LB2?
  I don't know what syntax to use to move the Lob of TBL_LB1 to TBL_LB2 field
  
  Thank you
  
  Published by: user12180597 on 14-Dec-2009 6.20

  Hello

  Something like that

  ALTER TABLE Product
      MOVE LOB() STORE AS (
          TABLESPACE TBL_LB2
      )
  

  Concerning
  Anurag

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  Lorien - MCSA/MCSE/network + / has + - if this post solves your problem, please click the 'Mark as answer' or 'Useful' button at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.