- SAP Managed Tags
Look at <a href="http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCDWBDIC/BCDWBDIC.pdf">BC - ABAP Dictionary</a>
<b>Pooled and Cluster Tables</b>
Table pools (pools) and table clusters (clusters) are special table types in the ABAP Dictionary.
The data from several different tables can be stored together in a table pool or table cluster.
Tables assigned to a table pool or table cluster are referred to as pooled tables or cluster tables.
A table pool or table cluster should be used exclusively for storing internal control information
(screen sequences, program parameters, temporary data, continuous texts such as
documentation). All data of commercial relevance is stored exclusively in transparent tables!
<b>Table Pools</b>
A table in the database in which all records from the pooled tables assigned to the table pool are
stored corresponds to a table pool.
<b>Table Clusters</b>
Several logical data records from different cluster tables can be stored together in one physical
record in a table cluster.
A cluster key consists of a series of freely definable key fields and a field (Pageno) for
distinguishing continuation records. A cluster also contains a long field (Vardata) that contains
the contents of the data fields of the cluster tables for this key. If the data does not fit into the long
field, continuation records are created. Control information on the structure of the data string is
still written at the beginning of the Vardata field.
Regards
Bluesky