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Abap dictionary 1
- 2. ABAP Dictionary • The ABAP Dictionary is the central repository for all data definitions in the R/3 system. • It permits common , nonredundant description of the data. • Management of data definitions Technical and semantic description Relationships ss • • • • Integration Activation Evaluation F1 and F4 help • It is also used to describe the logical structure of the objects in the application development environment, and shows how they are mapped to structure in the underlying physical database. Physical database
- 3. ABAP Dictionary • Relationships can be defined between different objects to ensure consistency of data. • All the objects maintained in the ABAP Dictionary are available throughout the system. • Changes to objects in the ABAP Dictionary take effect in all relevant system components via the activation technique. • Management of data definitions Technical and semantic description Relationships ss • • • • Integration Activation Evaluation F1 and F4 help Physical database
- 4. Integration with the ABAP Workbench • The ABAP Dictionary is actively integrated in the ABAP Development Workbench. • Changes stay local to the Workbench environment until activation. • Upon activation, the changes that were made are transferred to the runtime environment and then take immediate effect in the relevant ABAP programs and screens. ABAP Development Workbench Screen painter Menu painter Menu painter Runtime Environment Screens ABAP /4 program Dialogue Control Programs Transactions
- 5. ABAP Dictionary ABAP Dictionary T-Code : SE11
- 7. ABAP Dictionary Database Tables Object consisting of a list of fields, which has a physical underlying database table. Views A virtual table not containing any physical data. Data can be derived from one or more database tables. Data Types Describe the usages of a field in a specific business context. Can be one of three types Data element, structure and Table. Domains Describe the technical attributes of a field. Search helps Used to provide end users with input help on a field (F4) Lock Objects Used to manage simultaneous update of tables.
- 10. ABAP Dictionary Display: To view the data rows of table. Maintain : To Insert, update or Delete data rows of the table Read Write
- 11. ABAP Dictionary Program Access Direct Access Read READ/WRITE ?? READ/WRITE READ/W??? RITE Z7EMP
- 12. Technical Settings We must maintain the technical settings when we define a table in the ABAP Dictionary. The technical settings are used individually optimize the storage requirements and accessing behavior of database tables.
- 13. Technical settings Data Class Size Category Buffering
- 14. ABAP Dictionary
- 15. Technical Settings The table is automatically created on the database when it is activated in the ABAP Dictionary. The storage area to be selected (table space) and space allocation settings is determined from the settings for the data class and size category. The settings for buffering define whether and how the table should be buffered.
- 17. Data class Data classes maintained in SAP : Master Data: Master Data is data that is rarely modified. An Example of master data is the data of an Address, for example, the name, address and telephone number. Transaction Data: Transaction Data is data that is frequently modified. An example is the material stock of a warehouse , which can change after each purchase order. Organizational Data: Organizational Data is data that is defined during customizing when the system is installed and that is rarely modified thereafter. The Country keys are an example. System Data: System Data is data that the R/3 system itself needs . The program sources are an Example.
- 18. Data class Table space 1 App:. Mater Data Table Space 2 App:. System Data Table Space 2 App:. Transaction Data Table Space 2 App:. Organizational Data
- 20. ABAP Dictionary