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ABENLDB_USAGE - LDB USAGE

- Use

There are two ways of using a logical database.

• Linked with executable programs

• Called using function modules

When logical databases are linked with executable programs, the selections are entered using the selection screen and the data read from the logical database is passed to the program using interface work areas. If called using a function module, the selection screen is not displayed. The calling program must provide special subroutines, which are also referred to as callback routines instead of interface work areas. These routines are called by the function module and filled with data.