What are logical databases? What are the advantages/ disadvantages of logical databases?
To read data from a database tables we use logical database. A logical database provides read-only access to a group of related tables to an ABAP/4 program. Advantages: i)check functions which check that user input is complete, correct, and plausible. ii)Meaningful data selection. iii)central authorization checks for database accesses. iv)good read access performance while retaining the hierarchical data view determined by the application logic.
disadvantages: i)If you do not specify a logical database in the program attributes, the GET
events never occur. ii)There is no ENDGET command, so the code block associated with an event ends with the next event statement (such as another GET or an END-OF-SELECTION).
disadvantages: i)If you do not specify a logical database in the program attributes, the GET
events never occur. ii)There is no ENDGET command, so the code block associated with an event ends with the next event statement (such as another GET or an END-OF-SELECTION).