ABAP Dictionary is one the best tool of ABAP workbench and it is a central repository for data definitions in SAP system. It is used to store the data definitions, create and maintain user defined types.
ABAP Dictionary provides various tools to edit the SAP screen fields like assigning a field to input help (f4).
ABAP dictionary is a central storage area for the description where we can create the objects and changing, deleting the objects related to data base. The main object type of ABAP dictionary are-
- Database tables
- View
- Data types
- Type groups
- Search Help
- Domains and
- Lock objects.
Database tables: – It helps in create and maintain the tables, table should begin with letter Y or Z and length up to 16 characters.
View : – It act as virtual table and helps in retrieve the data.
Data type: – It helps in creating the user defined data elements, structure and tables.
Type group: – It creates the data group types in dictionary
Search help: – It defines the search help (F4) for the fields of database table and helps in providing the values for a user search queries
Domains: – Domain specifies the technical characters of a field such as data type field and length.
Lock objects : – It is used to synchronize the same data by one user or multiple users. SAP provides three types of lock objects- Read lock, write lock, enhanced lock.
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