What is a function pool?

Question

What is a function pool? How is it related to function group?

Answer 1

HI,
The introductory statement FUNCTION-POOL declares a program in which you can define function modules. At runtime, it has the effect that u2013 during program loading u2013 a new program group with its own screens and its own shared data areas is created in the internal session of the calling program. For this reason, function groups must always begin with a FUNCTION-POOL statement. The statement FUNCTION-POOL is usually generated by the Function Builder. Other programs (executable programs, module pools, and subroutine pools) should not begin with a FUNCTION-POOLstatement, since they would then not share common data areas with the caller when loaded by an external subroutine call. However, in exceptional cases, you can force processing of your own screens for externally called subroutines if you introduce executable programs or module pools with FUNCTION-POOL. As in the REPORT and PROGRAMstatements, you can specify the message class for the program and the standard list formatting options of the program using FUNCTION-POOL.
In simple Term,,,,
The FUNCTION-POOL statement is equivalent to the REPORT statement and introduces a function group.
A function group contains function modules introduced by the FUNCTION statement and called
with the CALL FUNCTION statement.
Hope this is useful for u...