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What is a Data Class?
The Data class determines in which tablespace the table is stored when it
is created in the database.
What is a Size Category?
The Size category describes the probable space requirement of the table
in the database.
How Many types of size categories and data classes are there?
There are five size categories (0-4) and 11 data classes, only three of
which are appropriate for application tables:
- APPL0 - Master data (data frequently accessed but rarely updated)
- APPL1 - Transaction data (data that is changed frequnetly)
- APPL2 - Organisational data (customizing data that is entered when system is
configured and then rarely changed)
What are control tables?
The values specified for the size category and data class are mapped to
database-specific values via control tables.
What is the function of the transport system and workbench organiser?
The function of the transport system and the Workbench Organizer is to
manage any changes made to objects of the ABAP/4 Development Workbench
and to transport these changes between different SAP systems.
What is a table pool?
A table pool (or pool) is used to combine several logical tables in the
ABAP/4 Dictionary. The definition of a pool consists of at least two key
fields and a long argument field (VARDATA).
What are pooled tables?
These are logical tables which must be assigned to a table pool when they
are defined. Pooled tables can be used to store control data (such as
screen sequences or program parameters).
What is a table cluster?
A table cluster combines several logical tables in the ABAP/4 Dictionary.
Several logical rows from different cluster tables are brought together
in a single physical record. The records from the cluster tables
assigned to a cluster are thus stored in a single common table in the
database.
Which objects are independent transport objects?
Domains, Data elements, Tables, Technical settings for tables,
Secondary indexes for transparent tables,
Structures, Views,
Matchcode objects, Matchcode IDs, Lock objects.
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