Explain logical databases

Question

Give a brief explanation of the logical databases. And also write down merits and demerits of it.

Answer 1

To read data from the database tables we use logical database. A logical database offers read-only access to the group of related tables to the ABAP/4 program.

Merits:

i) Check functions which check that user input is exact, complete and reasonable.

ii) Meaningfulness of data selection.

iii) Central authorization checks for the database accesses.

iv) Good read access performance while retaining hierarchical data view determined by application logic.

Disadvantages:

i) If you don’t specify the logical database in program attributes, the GET events not at all happen.

ii) There is no ENDGET command; consequently the code block associated with the event ends with next event statement (such as another GET or END-OF-SELECTION).