Where we can use pooled and cluster tables.

Hi Experts,
I have read all the threads and tutorials. all are telling like the difference between pooled and clulster tables are
Pooled table
It can hold small amount of data ( 10 to 100 records) and large number of tables( 100 to 1000 tables). It has fixed structure like Tabname, Varkey, Datain, Vardata.
Cluter tables
It can hold large amount of data but small number of tables. It is also have fixed strucuter like CLKEY1,CLKEY2 , CLKEY3...., Pageno, Timestamp, Pagelg, Vardata.
But i want which situation we can choose pooled table and which situation we can choose cluster table. In general way or Business way.
Thank you,
Srinivas M
Edited by: Srinivas Marapureddy on May 11, 2010 4:39 PM

>
El Tony wrote:
> Those table to manage big data volume, for example BSEG is a cluster table, this help to database for store the data in little amount. Instead the Pooled Table to store the table in other table, so that this help to database for store the data too but in more little amount.
>
> In Background ABAP to control this, because there are source code that help to show the data complete, but in the databse the data is store with alphanumerics. This is a advantage for the database.
Let me correct you, the data is not stored in alphanumeric but in RAW format in pool & cluster tables.
SAP says pool & cluster tables are created so that data from different tables belonging containing similar kind of data are clubbed together. I am not sure if storing data in RAW format compresses its size but SAP recommends storing business data in transperant tables.
Quote from SAP documentation:
"Data of commercial relevance is usually stored in transparent tables."
If data compression were a significant point SAP would have stored data in table clusters & not in transperant tables.
Comments are welcome.
BR,
Suhas

Similar Messages

Which type of information can be hold by pool and cluster tables

hi experts tell me exactly which type of information hold by pooled and cluster tables
thanks in advance

Hi
I hope, you know that Rewarding with Points for the Useful answers is the SDN policy
Pooled table
Pooled tables can be used to store control data (e.g. screen sequences,
program parameters or temporary data). Several pooled tables can be
combined to form a table pool. The table pool corresponds to a physical
table on the database in which all the records of the allocated pooled
tables are stored.
Cluster table
Cluster tables contain continuous text, for example documentation.
Several cluster tables can be combined to form a table cluster. Several
logical lines of different tables are combined to form a physical record
in this table category. This permits object-by-object storage or
object-by-object access. In order to combine tables in clusters, at
least part of the keys must agree. Several cluster tables are stored in
one corresponding table on the database.
Pool Tables (match codes, look up tables)
Should be accessed via primary key or
Should be buffered (SE11->Display Table->technical settings)
No secondary indexes
Select * is Ok because all columns retrieved anyway
Cluster Tables (BSEG,BSEC)
Should be accessed via primary key - very fast retrieval otherwise very slow
No secondary indexes
Select * is Ok because all columns retrieved anyway. Performing an operation on multiple rows is more efficient than single row operations. Therefore you still want to select into an internal table. If many rows are being selected into the internal table, you might still like to retrieve specific columns to cut down on the memory required.
Statistical SQL functions (SUM, AVG, MIN, MAX, etc) not supported
Can not be buffered
Reward points for useful Answers
Regards
Anji

Can we create secondary indexes in pooled and cluster table?

hello all
can we create secondary indexes in pooled and cluster table?

Hi,
Yes, you can.
Refer the below links
[http://www.sap-img.com/abap/the-different-types-of-sap-tables.htm|http://www.sap-img.com/abap/the-different-types-of-sap-tables.htm]
[http://help.sap.com/saphelp_40b/helpdata/en/cf/21f083446011d189700000e8322d00/content.htm|http://help.sap.com/saphelp_40b/helpdata/en/cf/21f083446011d189700000e8322d00/content.htm]
Regards,
SB

What is the differences between Transparent,Pooled and Cluster tables?

Hello all,
What is Pool table?What is the differences between Transparent,Pooled and Cluster tables?
Regards!
Purna

Transparent table:
Tables can be defined independently of the database in the ABAP Dictionary. The fields of the table are defined together with their (database-independent) data types and lengths.
A table definition in the ABAP Dictionary has the following components:
Table fields: The field names and the data types of the fields contained in the table are defined here.
Foreign keys: The foreign keys define the relationships between this table and other tables.
Technical settings: The technical settings define how the table is created on the database.
Indexes: Indexes can be defined for the table to speed up data selection from the table.
There are three categories of database tables in the ABAP Dictionary.
A physical table definition is created in the database for the table definition stored in the ABAP Dictionary for transparent tables when the table is activated. The table definition is translated from the ABAP Dictionary to a definition of the particular database.
On the other hand, pooled tables and cluster tables are not created in the database. The data of these tables is stored in the corresponding table pool or table cluster. It is not necessary to create indexes and technical settings for pooled and cluster tables.
Pooled table
Pooled tables can be used to store control data (e.g. screen sequences, program parameters or temporary data). Several pooled tables can be combined to form a table pool. The table pool corresponds to a physical table on the database in which all the records of the allocated pooled tables are stored.
Cluster table
Cluster tables contain continuous text, for example, documentation. Several cluster tables can be combined to form a table cluster. Several logical lines of different tables are combined to form a physical record in this table type. This permits object-by-object storage or object-by-object access. In order to combine tables in clusters, at least parts of the keys must agree. Several cluster tables are stored in one corresponding table on the database.
Regds,
Manohar

Replicating Pool and Cluster tables in HANA

Hi,
Has anyone been able to successfully replicate the Pool and Cluster tables to HANA? I browsed around but am not able to find any solid material/documents related to the same. Please point me to the same.
yogesh

Hi Yogesh,
Maybe you skiped this one. The sample uses BSEG from cluster RFBLG and it's very well explained by Tobias Koebler
How to enable parallel replication
Regards, Fernando Da Rós

Inforation on Pool tables and cluster tables required.

I want to know about the pool tables and cluster tables like how to create them and how to look the tables associated with the given tables. Like for the table BSEG we have other tables linked BSID etc. I'm new to this concept please guide me.

Pooled Table:
A pooled table in R/3 has a many-to-one relationship with a table in the database (see Figures 3.1 and 3.2). For one table in the database, there are many tables in the R/3 Data Dictionary. The table in the database has a different name than the tables in the DDIC, it has a different number of fields, and the fields have different names as well. Pooled tables are an SAP proprietary construct.
When you look at a pooled table in R/3, you see a description of a table. However, in the database, it is stored along with other pooled tables in a single table called a table pool. A table pool is a database table with a special structure that enables the data of many R/3 tables to be stored within it. It can only hold pooled tables.
R/3 uses table pools to hold a large number (tens to thousands) of very small tables (about 10 to 100 rows each). Table pools reduce the amount of database resources needed when many small tables have to be open at the same time. SAP uses them for system data. You might create a table pool if you need to create hundreds of small tables that each hold only a few rows of data. To implement these small tables as pooled tables, you first create the definition of a table pool in R/3 to hold them all. When activated, an associated single table (the table pool) will be created in the database. You can then define pooled tables within R/3 and assign them all to your table pool.
Pooled tables are primarily used by SAP to hold customizing data.
Cluster Table:
A cluster table is similar to a pooled table. It has a many-to-one relationship with a table in the database. Many cluster tables are stored in a single table in the database called a table cluster.
A table cluster is similar to a table pool. It holds many tables within it. The tables it holds are all cluster tables.
Like pooled tables, cluster tables are another proprietary SAP construct. They are used to hold data from a few (approximately 2 to 10) very large tables. They would be used when these tables have a part of their primary keys in common, and if the data in these tables are all accessed simultaneously.
Table clusters contain fewer tables than table pools and, unlike table pools, the primary key of each table within the table cluster begins with the same field or fields. Rows from the cluster tables are combined into a single row in the table cluster. The rows are combined based on the part of the primary key they have in common. Thus, when a row is read from any one of the tables in the cluster, all related rows in all cluster tables are also retrieved, but only a single I/O is needed.
A cluster is advantageous in the case where data is accessed from multiple tables simultaneously and those tables have at least one of their primary key fields in common. Cluster tables reduce the number of database reads and thereby improve performance.
Restrictions on Pooled and Cluster Tables
1. Pooled and cluster tables are usually used only by SAP and not used by customers, probably because of the proprietary format of these tables within the database and because of technical restrictions placed upon their use within ABAP/4 programs. On a pooled or cluster table:
2. Secondary indexes cannot be created.
3. You cannot use the ABAP/4 constructs select distinct or group by.
4.You cannot use native SQL.
5.You cannot specify field names after the order by clause. order by primary key is the only permitted variation.
For creation of pooled /cluster table, have a look at below link.
http://help.sap.com/saphelp_erp2004/helpdata/en/81/415d363640933fe10000009b38f839/frameset.htm
For creation of table pool /cluster, have a look at below link.
http://help.sap.com/saphelp_erp2004/helpdata/en/81/415d363640933fe10000009b38f839/frameset.htm
Have a look at below link.
http://www.sap-img.com/abap/the-different-types-of-sap-tables.htm
Best Regards,
Vibha
*Please mark all the helpful answers

Cannot use comparisons with column column references in pool and cluste

Hi Experts,
I am facing an issue in a select statement written in 4.6 version and in that the table is a transparent table but when porting it to ECC6.0, it gives the follwing error:
You cannot use comparisons with column column references in pool and cluster tables:'A~MATNR'. refe
The select statement is as below:
SELECT akschl alifnr amatnr aekorg awerks aesokz
         aknumh adatbi a~datab
         bmtart bmatkl
        b~yybcezndr " Commented as not required(IDE)
         cwerks cmmsta c~herkl
            INTO CORRESPONDING FIELDS OF TABLE gt_a017
            FROM a017 AS a
           INNER JOIN mara AS b
            ON bmatnr = amatnr
             INNER JOIN marc AS c
               ON cmatnr = bmatnr
              AND cwerks = awerks
             INNER JOIN lfa1 AS d
             ON dlifnr = alifnr
            WHERE a~kappl = 'M'           AND
                  a~lifnr IN s_lifnr              AND
                  a~matnr IN s_matnr        AND
                  a~ekorg IN s_ekorg        AND
                 a~kschl = v_kschl        AND
                  a~kschl = gv_kschl       .
Kindly help me out in this as A017 is a pooled table in ECC 6.0 . Thanks in advance!!!
Thanks and Best Regards,
Sahil

Hi Sahil,
Refer below code
SELECT KSCHL LIFNR MATNR EKORG WERKS ESOKZ
       KNUMH DATBI DATAB
FROM A017
INTO IT_A017 " internal Table
WHERE KAPPL = 'M' AND
        LIFNR IN S_LIFNR AND
        MATNR IN S_MATNR AND
        EKORG IN S_EKORG AND
*         kschl = v_kschl AND
        KSCHL = GV_KSCHL .
IF IT_A017[] IS NOT INITIAL.
    SELECT MATNR MTART MATKL
          FROM MARA
      INTO TABLE IT_MARA" internal Table
      FOR ALL ENTRIES IN IT_A017
      WHERE MATNR = IT_A017-MATNR.
    SELECT MATNR WERKS MMSTA HERKL
      FROM MARC
      INTO TABLE IT_MARC" internal Table
      FOR ALL ENTRIES IN IT_A017
      WHERE MATNR = IT_A017-MATNR AND
            WERKS = IT_A017-WERKS.
    SELECT LIFNR
      FROM LFA1
      INTO IT_LFA1" internal Table
      FOR ALL ENTRIES IN IT_A017
      WHERE LIFNR = IT_A017-LIFNR.
    ENDIF.
After this use READ statement and fill the data in final internal table..
Please search on SCN for more information about how to use FOR ALL ENTRIES..
Hope it will solve your problem..
Thanks & Regards
ilesh 24x7
ilesh Nandaniya

Why Inner join or Outer join is not used for Pool or Cluster tables ?

Hi SAP-ABAP Experts .
With Due Regards .
May u explain me why Inner join or Outer join is not useful for Pool or Cluster tables ?
because peoples advised not use Joins for Pool and Cluster tables , What harm will take place , If we do this ?
Best Regards to all : Rajneesh

Both Pooled and Cluster Tables are stored as tables within the database. Only the structures of the two table types which represent a single logical view of the data are defined within the ABAP/4 Data Dictionary. The data is actually stored in bulk storage in a different structure. These tables are commonly loaded into memory (i.e., 'buffered') due to the fact they are typically used for storing internal control information and other types of data with little or no external (business) relevance.
Pooled and cluster tables are usually used only by SAP and not used by customers, probably because of the proprietary format of these tables within the database and because of technical restrictions placed upon their use within ABAP/4 programs. On a pooled or cluster table:
Secondary indexes cannot be created.
You cannot use the ABAP/4 constructs select distinct or group by.
You cannot use native SQL.
You cannot specify field names after the order by clause. order by primary key is the only permitted variation.
I hope it helps.
Best Regards,
Vibha
Please mark all the helpful answers

Warnings Pool or cluster table selected to check/collect statistics

Dear all,
I am getting error in in db13 backup.
We are using Sap Ecc5 and
oracle 9i on Window 2003.
Production Server I am facing problem suddenly in db13 the UpdateStatsEnded with Return code:    0001 Success with warnings
BR0819I Number of pool and cluster tables found in DDNTT for owner SAPPRD: 169
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.EPIDXB
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.EPIDXC
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.GLSP
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.GLTP
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.KAPOL
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.KOCLU
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.M_IFLM
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.VBCLU
BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.VBFCL
And in db02
Missing in R/3 DDIC 11   index
MARA_MEINS
MARA_ZEINR
MCHA_VFDAT
VBRP_ARKTX
VBRP_CHARG
VBRP_FKIMG
VBRP_KZWI1
VBRP_MATKL
VBRP_MATNR
VBRP_SPART
VBRP_WERKS
Please guide steps   how to build index and Pool or cluster table problem.
Thanks,
Kumar

> BR0819I Number of pool and cluster tables found in DDNTT for owner SAPPRD: 169
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.EPIDXB
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.EPIDXC
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.GLSP
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.GLTP
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.KAPOL
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.KOCLU
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.M_IFLM
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.VBCLU
> BR0871W Pool or cluster table selected to check/collect statistics: SAPPRD.VBFCL
Upto Oracle 9i the rulebased optimizer was still used for Pool/Clustertables for reasons of plan stability (e.g. always take the index).
To ensure that this is the case, these tables/indexes mustn't have CBO statistics.
Therefore these tables are usually excluded from getting CBO statistics via an DBSTATC entry. You can modify this setting in transaction DB21.
> And in db02
>
>
Missing in R/3 DDIC 11   index
> MARA_MEINS
> MARA_ZEINR
> MCHA_VFDAT
> VBRP_ARKTX
> VBRP_CHARG
> VBRP_FKIMG
> VBRP_KZWI1
> VBRP_MATKL
> VBRP_MATNR
> VBRP_SPART
> VBRP_WERKS
Well, these indexes have been setup just in the database and not (how it is supposed to be) via the SE11. As the indexes have a naming-scheme, that is not supported by the ABAP Dictionary, the easiest way to get away from the warnings is to check which columns are covered by the indexes, drop the indexes on DB level and recreate them via SE11.
Best regards,
Lars

How can I get data in flat file from Pool table and cluster table ?

Hi,
I am working in one Achiving project. My requirement is to get data into flat file from Cluster table and pool table.
Is there any tool avilable to download data into flat file from pool table and cluster table ?
if table name given in the selection screen then data will be downloaded into flat file.
waiting for quick response.
Best Regards,
Bansidhar

Data cannot be retrived directly form the cluster table
as the Cluster results are stored in Cluster Key say for example PCLkey
and form that Key we need to fetch the data
these clustes are not the part of PNP or PNPCE tables
for ur info kindly check

Generic extractors on pool table and Cluster tables

Good Afternoon all,
Can we create generic extractors on Cluster or pool Table. If yes Let me know how?
I am trying to create a Generic Extractor on BSEC Table but it is not allowing me to do this. It throws error that"Extraction from pool tables and cluster tables is not permitted"
Kindly guide me on this
Thanks,
Vaishali.

Hi
you cannot do generic extraction directly on pooled or cluster tables.
You can create a function module, then you can create a Generic Data source based on this..
Hope it helps,
Thanks,
Teja
Edited by: Teja badugu on Apr 15, 2008 12:24 PM

Where we can use standard ODS Object and Trasactional ODS Object ?

Where we can use standard ODS Object and Trasactional ODS Object ?

Hi,
In a standard ODS object, data is stored in different versions (active, delta, modified), whereas a transactional ODS object contains the data in a single version. Therefore, data is stored in precisely the same form in which it was written to the transactional ODS object by the application. In BW, you can use a transaction ODS object as a data target for an analysis process. The transactional ODS object is also required by diverse applications, such as SAP Strategic Enterprise Management (SEM) for example, as well as other external applications.Transactional ODS objects allow data to be available quickly. The data from this kind of ODS object is accessed transactionally, that is, data is written to the ODS object (possibly by several users at the same time) and reread as soon as possible.
It offers no replacement for the standard ODS object. Instead, an additional function displays those that can be used for special applications.
Regards,
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Any problem using bseg and bkpf tables

For fico details i using bseg and bkpf tables.
I noted that programming is very difficult because of these tables are cluster table.
plz give me other tables
if i using these tables any problem will come?

>
mysvijai197715 wrote:
> Hi Aniesh,
>
> BSEG and BKPF are cluster tables. It contains transperant tables like BSIS, BSIK etc. For example to take vendor details usr the BSIK.If you use BSEG and BKPF it will take long time search. suppose your concern having lot of data means may be your server will get shutdown. So use only trasnperant tables like BSIS, BSIK etc.
>
>
> Regards
> R.Vijai
Incorrect. BKPF is a transparent table and not a cluster table and you can use it just like any other transparent table. BSEG is a cluster table but there is no problem selecting from it so long as you use the key of BUKRS, BELNR, GJAHR - unless you are selecting a very large amount of data, but then this can cause problems when selecting from any type of table.
The advantage of using BSEG over the other FI line item tables such as BSIS and BSIK is that it holds all the lines of an FI document while the others will hold only a subset eg BSIK will only hold lines that contain a vendor reference and BSAS holds only cleared GL account lines. Though you can only use it when you have the key. If you need to search on vendor, you can use BSIK as a starting point, but since I usually need to get hold of all the lines on an FI document, I then have to select from BSEG anyway.

How can use Attrib and Trasitive attrib in Infoset in BI7

Hi Experts,
How can use Attrib and Trasitive attrib in Infoset In BI7.
Detail will be great.
Thanks

Hi Saipriya
the code :
data : begin of itab occurs 0,
partner_no like crmd_order_index-partner_no,
gross_value like crmd_pricing_i-gross_value,
end of itab .
data : begin of wa occurs 0,
partner_no like crmd_order_index-partner_no,
gross_value like crmd_pricing_i-gross_value,
end of wa .
data : begin of itab2 occurs 0,
partner_no like crmd_order_index-partner_no,
gross_value like crmd_pricing_i-gross_value,
end of itab2 .
data : begin of wa2,
partner_no like crmd_order_index-partner_no,
gross_value like crmd_pricing_i-gross_value,
end of wa2 .
START-OF-SELECTION.
select partner_no
gross_value
into CORRESPONDING FIELDS OF TABLE itab
from crmd_order_index join crmd_pricing_i on crmd_order_index~item eq
crmd_pricing_i~guid
where crmd_order_index~process_type_ix = 'ZTA'
and crmd_order_index~pft_1 = 'X' .
LOOP AT itab INTO wa .
MOVE-CORRESPONDING wa TO itab2.
COLLECT itab2.
ENDLOOP.
LOOP AT itab2 INTO wa2 .
APPEND BP_GROSS.
actually we don't know how can we benefit from this code in infoset.
table1 :CRMD_ORDER_INDEX (the table we take customer number (CRMD_ORDER_INDEX-PARTNER_NO))
table2 : CRMD_PRICING_I (We take gross value form this table)
We added BP_GROSS field (adtiona filed to infoset) and would like to append the value we have from the code (Total gross per Customer) but it doesn't work in infoset.
Thanks in advance.
M.

Where we can use pooled and cluster tables.

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