ABAP Keyword Documentation → ABAP − Reference → Obsolete Language Elements → Obsolete Processing of External Data → Logical Databases (Obsolete)
Logical Databases - Components
The main features of a logical database are
- a hierarchical structure
- selections as a standalone standard selection screen
- a database program written in ABAP
- Further elements, which add to the functions.
When an executable program is created, it can be assigned to a logical database using the Logical Database attribute. This allows the standard selection screen and the program flow to be combined with the selection screen and flow of the logical database.
Furthermore, logical databases can call the function module LDB_PROCESS. This function module can be used to call multiple logical database from a single program and nested as required. A logical database can also be called more than once in a program, if programmed accordingly.
7.31 | 7.40 | 7.54
When creating a logical database in Logical Database Builder, the following order should be kept, since this then makes it easier to generate proposal for the remaining components from the those already created. Some of the most important properties of a logical database are defined at the same time as its structure. After the definition of the structure, a proposal is created for the selection include. The structure and selection include are used to generate a template for the database program. These components can then quickly be used to create a ready-to-run logical database, in which further requirements can be implemented.
Logical Databases - Selections
Logical Databases - Database Program