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ABAPPERFORM_OBSOLETE - PERFORM OBSOLETE

ABAPPERFORM_OBSOLETE - PERFORM OBSOLETE

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PERFORM subr(prog)

Short Reference



PERFORM subr(prog) $[IF FOUND$] $[parameter_list$].

Effect

A variant of the external subroutine call that is not allowed in classes. The statement PERFORM calls the statically specified subroutine subr of a statically specified program prog.

  • The existence of the specified program and subroutine is not checked by the syntax check. Only the extended program check reports a nonexistent program or subroutine as an error by default. If the addition IF FOUND is specified, the extended program check does not perform a check either.
  • If the specified subroutine or program does not exist at runtime, a catchable exception of the class CX_SY_DYN_CALL_ILLEGAL_FORM or CX_SY_PROGRAM_NOT_FOUND is raised by default. If the addition IF FOUND is specified, the statement PERFORM is skipped.

Notes

  • In this variant, the program name prog is specified directly in parentheses. Since parentheses in operand positions indicate a dynamic specification in all other cases, this form of the name is obsolete. The specification with the addition IN PROGRAM should be used instead.
  • External calls of subroutines are obsolete anyway. Instead of subroutines, methods and function modules can be used as explicit functional interfaces of a program.
  • Furthermore, external calls of subroutines are critical, since it cannot usually be statically determined to which program groups the compilation unit is assigned.





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