Refresh a specific partition of the table, materialized

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• Column of type BLOB in own tablespace in partition in the table, tablespace to move

  Hi all

  First off I use Oracle Database 11.2.0.2 on AIX 5.3.

  We have a table is partitioned on a monthly basis.

  In this table, there is a partition (BOTTOM), this lower score is 1.5 TB in size thanks to a BLOB column called (ATTACHMENT).

  The rest of the table is not large, about 30 GB, it's the BLOB column that uses all the space.

  The lower part is in its own default tablespace (DefaultTablespace), the BLOB column in the lower score is also in its own tablespace (TABLESPACE_LOB) - 1.5 to

  I was invited in order to free up space by moving the TABELSPACE_LOB (from the low partition) to a data archive, confirming the data is there and then remove the lower score of the production.

  I do not have enough free space (or time) make an expdp, I think not only its doable with data so much.

  CREATE TABLE tablename
  (
    xx                          VARCHAR2(14 BYTE),          
    xx                          NUMBER(8),    
    xx         NUMBER,
    ATTACHMENT   BLOB,
    xx             DATE,
    xx             VARCHAR2(100 BYTE),
    xx                     INTEGER,
  )
  LOB (ATTACHMENT) STORE AS (
    TABLESPACE  DefaultTablespace
    ENABLE      STORAGE IN ROW
  NOCOMPRESS
  TABLESPACE DefaultTablespace
  RESULT_CACHE (MODE DEFAULT)
  
  
  PARTITION BY RANGE (xx)
  ( 
    PARTITION LOWER VALUES LESS THAN ('xx')
      LOGGING
      COMPRESS BASIC
      TABLESPACE DefaultTablespace
      LOB (ATTACHMENT) STORE AS (
        TABLESPACE  TABLESPACE_LOB
        ENABLE      STORAGE IN ROW
  )
  
  ...>>
  
  

  My idea was to take a table, excluding the attachment column datapump, export using external tables.

  Then to create the table on the database archive 'with' the attachment column.

  Import data only, as I understand that if you use a dump file that has too many columns Oracle he will manage, I hope it will work the other way around.

  Then on the production, make the TABLESPACE_LOB read-only and move it to the new file system.

  It's a little more complicated that a normal gesture of tablespace because of how the table is split.

  Any advice would be much appreciated.

  I was thinking about an approach as:

  SWAP PARTITION allows to separate the partition of the table

  • Create a non-partitioned table which is otherwise identical in structure to tablename (nonpart_tablename)
  • ALTER TABLE TableName LOWER WITH nonpart_tablename SWAP PARTITION

  Move the segment of the table at TABLESPACE_LOB, or to a different tablespace on its own. It is, as you say, only 30 GB and I think (but not strongly enough to go forward without testing/validation on a smaller scale) that the displacement of the segment of the table in this way does not disrupt the LOB segment, as long as you don't say MOVE LOB.

  • ALTER TABLE nonpart_tablename MOVE TABLESPACE TABLESPACE_LOB

  Now the TABLESPACE_LOB tablespace is self-contained and you can make it transportable.

• Adding new partition in the table are

  Hello
  
  Oracle 9i
  Windows 2003 operating system
  
  The main entry/exit table is one of the base tables that has a large number of records and a very high success rate, and to avoid poor performance that may occur in such cases, Oracle Table partitioning technique has been examined in the early stages of the implementation of the system.
  
  Unfortunately, the technique used to divide data based on the year of the transaction considered the year 2010 as the last specific partition, so all records created after this year is gathered in a single partition and this may cause poor performance in the years to come.
  
  Are required to add another 10 partitions; up to the year 2020 taking into account that the downtime should be close to zero.
  
  Ground:
  
  According to my knowledge
  
  for this, so we can create a new table with the same columns and add required 10 more partitions, and if we take 2 scenarios like
  
  export/imp
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  Concerning
  873393

  In my script, I have a DROP TABLE because I'll put up a reproducible demonstration. I can run the script repeatedly and regenerate the same demo data!
  In your environment you would not fall off the table!
  To simplify the demo for you: IGNORE the DROP TABLE command. Pretend it does not exist.

  Hemant K Collette

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• HowTo archive several Partitions of the Table to a new table?

  We have a very big_table partitioned on the TRAN_DATE column per month.
  
  PARTITION 'P200310' VALUES LESS THAN (TO_DATE (' 2003-11-01 00:00:00 ',' SYYYY-MM-DD HH24:MI:SS ',' NLS_CALENDAR = GREGORIAN '))
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  We wanted sheet music archive (consolidated) "P200812" "P200811" "P200810"... and below in a new_table.
  
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  I think a merger of all the partitions P200812 and below in a single partition and make the Exchange. What is the quickest way?
  
  Any help or pointers will be greatly appreciated.
  
  Thank you.
  
  Edited by: joey_p May 14, 2010 12:45 AM

  create new_table as select * from big_table where 1=2;  -- create an empty, non-partitioned table
  alter new_table nologging;
  alter session enable parallel dml;
  insert /*+ APPEND PARALLEL (n 2) */ into new_table n
  select /*+ PARALLEL (b 2) */ * from big_table partition (first_partition_name);
  commit;
  insert /*+ APPEND PARALLEL (n 2) */ into new_table n
  select /*+ PARALLEL (b 2) */ * from big_table partition (second_partition_name);
  commit;
  alter table big_table truncate partition (first_partition_name);
  alter table big_table truncate partition (second_partition_name);
  alter table big_table merge partition ....
  

  TRUNCATE and MERGE orders that you would do once you have verified that all the data has been copied to the new table. (and, preferably, after a BACKUP was taken, because integration into new_table was made without redoing loggging.

  Hemant K Collette
  http://hemantoracledba.blogspot.com

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• Move the partition of the table and get ORA-14006: invalid partition name

  I'm using oracle 11.2.0.4 and I am trying to move a partitioned table to one tablespace to another.  I checked may times and I have the correct table name and the name of the partition.  However, I get the error ora-14006.

  Can see everything what could be the problem?

  SQL > ALTER TABLE GWPROD. QRY_TES_ROLLINGCUREDITS MOVE PARTITION 201112 TABLESPACE GW_PROD_T2 PARALLEL (DEGREE 4) NOLOGGING;

  ALTER TABLE GWPROD. QRY_TES_ROLLINGCUREDITS MOVE PARTITION TABLESPACE GW_PROD_T2 PARALLEL (DEGREE 4) NOLOGGING 201112

  *

  ERROR on line 1:

  ORA-14006: invalid partition name

  Thanks in advance.

  Names that begin with numbers are not legal partition names. A fool created by placing them between double quotes. You will need to do the same.

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• Create index partition in the partition table tablespace

  Hello
  
  I am running a work custom that
  
  * Creates a tablespace by day
  * Creates the daily table partition in the created tablespace
  * Removes the days tablepartition X
  * Removes the storage space for this partition of X + 1 day.
  
  The work above works perfectly, but it has problems with the management of the index for these partitioned tables. In the old database (10g - single node), all indexes and partitions exist in a BIG tablespace and when I imported the table creation script in the new database, I changed all the partitions table & index to go in their respective space.
  
  For example:
  
  Table_name... Nom_partition... Index_Part_name... Tablespace_name
  ============...================............====================...........=================
  TABL1... TABL1_2012_07_16... TABL1_IDX_2012_07_16... TBS_2012_07_16
  TABL1... TABL1_2012_07_15... TABL1_IDX_2012_07_15... TBS_2012_07_15
  
  
  But now, when the job is run, it creates the index in the tablespace TBS_DATA default.
  
  Table_name... Nom_partition... Index_Part_name... Tablespace_name
  ============...================.............====================...........=================
  TABL1... TABL1_2012_08_16... TABL1_IDX_2012_08_16... TBS_DATA
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  I can issue alter index rebuild to move the index to its tablespace default, but how can I make sure that the index is created in the designated tablespace?
  
  NOTE: the partition/tablespace management work that I run only creates the partition of the table and not the index.
  
  
  The new env is a cluster of CARS of 2 nodes 11 GR 2 on Linux x86_64.
  
  
  Thanks in advance,
  aBBy.

  try something like this

  ALTER table tab_owner.tab_name add the partition v_new_part_nm
  values less (to_date('''|| v_new_part_dt_formatted ||'') ((', "DD-MON-YYYY)) tablespace ' | part_tbs
  update the index (ind1_name (partition ind_partition_name tablespace ind_part_tbs)
  ind2_name (partition tablespace ind_part_tbs ind_partition_name))
  ;

• Table partitioned using the hash partition

  I need to create the table using hash partition and need to specify the number of partitions (for example, 32)
  1. How/where to specify the number of partitions? I checked under "partitioning" tab of the properties of the table, but "system partition" is disabled.
  2. What is the difference between the hash by quantity vs Hash of the list of partitions and which should I use?

  Hello

  To do this, you must set the Partition Type to HASH BY QUANTITY. Then, tab Tablespaces part of hash, you can set the quantity field on HashP to the number of partitions.

  Ownership of the system partition is only enabled if the type of partitioning SYSTEM.
  Hash partition list allows you to add entries in hash Partitions of the Table nsud Partition to set each individual partition.

  David

• Limit the number of partitions of a table can have

  Hello
  
  It has been a while I think about a simple method and the best solution to a performance problem in my application. Benefiting from the table partitioning seems a simpler approach. It involves tiny my application code changes and more, it keeps the logic of global application 100% intact. However, sometimes the number of required partitions can grow to more than 500 thousand. I know another application implementation of partitions that 50 thousand for one of his paintings. I wonder if Oracle recommends or puts a limit to a number of partitions of the table can have. How does that limit, if it exists, varies so each of my partition table contains only a small amount of data. say, no more than 2 thousand records each of size 1 KB. What are the important considerations to keep in mind while creating the huge number of partitions of a table?
  
  All entries on this would be a great help.
  
  
  Thank you
  EXISTING
  
  
  PS: versions of Oracle 10 g from to consider.
  
  Published by: Olivia on December 30, 2009 09:46
  
  Published by: Olivia on December 30, 2009 09:50

  Hello

  Please visit the following link.

  Maximum number of partitions?

  Concerning

• Partition wise joined possible with partitions of the interval?

  Hello

  I want to know the score wise join (NTC) is possible with interval partitioning - I can't find an explicit statement that he isn't, but I can't make it work - I did a simple test case to illustrate the issue.

  below, I have 2 create table scripts - 1 for the case of interval and 1 for the case of hash - I then a simple query on these 2 objects which should produce a NTC.

  In the case of hash, it works very well (see screenshot 2nd with a set of slaves), the first screenshot shows the case of the interval where I find myself with 2 sets of slaves and no NTC.

  No idea if this is possible and I just missed something?

  (for the test case choose the names of schema/storage appropriate for your system)

  Oh and version (I almost forgot... :-))-East 11.2.0.4.1 SLES 11)

  See you soon,.

  Rich

  -case interval

  CREATE TABLE 'SB_DWH_IN '. "' TEST1 '.

  TABLESPACE "SB_DWH_INTEGRATION".

  PARTITION BY RANGE ("OBJECT_ID") INTERVAL (10000)

  (PARTITION 'LESS_THAN_ZERO' VALUES LESS THAN (0) TABLESPACE "SB_DWH_INTEGRATION")

  in select * from DBA_OBJECTS where object_id is not null;

  CREATE TABLE 'SB_DWH_IN '. "" TEST2 ".

  TABLESPACE "SB_DWH_INTEGRATION".

  PARTITION BY RANGE ("OBJECT_ID") INTERVAL (10000)

  (PARTITION 'LESS_THAN_ZERO' VALUES LESS THAN (0) TABLESPACE "SB_DWH_INTEGRATION")

  in select * from DBA_OBJECTS where object_id is not null;

  -case of hash

  CREATE TABLE 'SB_DWH_IN '. "' TEST1 '.

  TABLESPACE "SB_DWH_INTEGRATION".

  8 partitions PARTITION OF HASH ("OBJECT_ID")

  store in ("SB_DWH_INTEGRATION")

  in select * from DBA_OBJECTS where object_id is not null;

  CREATE TABLE 'SB_DWH_IN '. "" TEST2 ".

  TABLESPACE "SB_DWH_INTEGRATION".

  8 partitions PARTITION OF HASH ("OBJECT_ID")

  store in ("SB_DWH_INTEGRATION")

  in select * from DBA_OBJECTS where object_id is not null;

  -query to run

  Select / * + PARALLEL(TEST2,8) PARALLEL(TEST1,8) * / *.

  of 'SB_DWH_IN '. "" TEST2 ","SB_DWH_IN ". "' TEST1 '.

  where TEST1.object_id = test2.object_id

  

  

  It is planned and a consequence of the estimate of the number of parallel slaves.

  To the parallel 41 each slave made 3 passes (i.e. sleeves 3 partitions).

  Add a partition (by table), and a set of slaves will have to manage a 4th pass: the cost of the query using NTC would increase from 33 percent even if the modification of the data is less than 0.8%.

  I guess that in the production Oracle distributes your lines of 1 M for a hash join.

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  /*+

  leading (FAT kid)

  USE_HASH (large)

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  PQ_DISTRIBUTE (wide none none)

  */

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  Concerning

  Jonathan Lewis

• How to extract specific data from the user to view?

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  I have a requirement I need to display only the Session_user-specific data in the table. Scenario is that if the user belongs to a specific region should be able to see data for that specific region only.

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• Daily requirement Auto partitioning on space table

  Hi gurus of the Oracle

  How to configure the Oracle Table for partition of auto every day in space table every day.

  There should be one to a mapping between the space in the partition and the table

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  Our agreement is intended to improve query response time

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