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SAP reference · Lesson

Function modules

Quick answer

Function modules are building blocks of ABAP and integration.

Key takeaways

  • A function module is a callable procedure with a defined interface (import/export/tables/exceptions), grouped into function groups.
  • Use SE37 (Function Builder) to view/test a function module.
  • Search by name pattern for the area you need.
  • Watch out: Guessing instead of using the reference tools.

What it is

A function module is a callable procedure with a defined interface (import/export/tables/exceptions), grouped into function groups. SAP delivers thousands (for conversions, reads, postings); BAPIs are a special, released, remote-enabled kind.

How to find/use it

  • Use SE37 (Function Builder) to view/test a function module.
  • Search by name pattern for the area you need.
  • Check whether it is remote-enabled (RFC) for integration.
  • Prefer released/BAPI function modules for stable use.

Why it matters

Function modules are building blocks of ABAP and integration. Finding the right existing one (rather than reinventing it) is a key skill, and knowing whether it is released/remote-enabled matters for safe, upgrade-proof use.

Common pitfalls

  • Guessing instead of using the reference tools.
  • Editing/using without understanding the object.
  • Relying on memory for details you can look up.

Want to learn this properly?

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Check your understanding

  1. Which statement is true of Function modules?

    • A. A function module is a callable procedure with a defined interface (import/export/tables/exceptions), grouped…
    • B. In Fiori, roles (PFCG business roles) tie everything together: they grant the backend authorizations and…
    • C. SAP’s classic architecture is a three-tier client-server model, presentation, application and database…
    Show answer

    A. A function module is a callable procedure with a defined interface (import/export/tables/exceptions), grouped…

    Covered in the “What it is” section of this lesson.

  2. Which of these also applies to Function modules?

    • A. Following steps without understanding the concept.
    • B. SAP delivers thousands (for conversions, reads, postings); BAPIs are a special, released, remote-enabled kind.
    • C. Inactive OData service, the classic "app not working".
    Show answer

    B. SAP delivers thousands (for conversions, reads, postings); BAPIs are a special, released, remote-enabled kind.

    Covered in the “What it is” section of this lesson.

  3. Which part of the Learn SAP curriculum covers Function modules?

    • A. SAP reference
    • B. SAP Fiori
    • C. SAP ABAP development
    Show answer

    A. SAP reference

    This lesson sits in the SAP reference section of the Learn SAP course.

Frequently asked questions

What does the term Function modules refer to in SAP?

Function modules are reusable ABAP procedures, many delivered by SAP, that perform specific tasks and can be called locally or remotely (RFC). This reference explains them and how to find them.

Which transaction codes come up with Function modules?

Use SE37 (Function Builder) to view/test a function module. Search by name pattern for the area you need. Check whether it is remote-enabled (RFC) for integration.

What else is worth knowing about Function modules?

Function modules are building blocks of ABAP and integration.

What tends to go wrong with Function modules?

Guessing instead of using the reference tools. Editing/using without understanding the object. Relying on memory for details you can look up.
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