Function module to read meta data / signature of function module

martin_reichenecker — Wed, 13 Apr 2022 08:46:06 GMT

Hello fellows,

Besides implementing interfaces with OData, we still need to provide interfaces via RFC. To do this, function modules are implemented, which are then converted into a RESTful service by our middleware WSO2.

We currently have to read out the signature of a function module manually and make it available to our integration colleagues, what means a lot of manual effort.

Example: A function module with the following signature:

Import

- MATERIAL_NR TYPE MATNR

Export

-RETURN TYPE BAPIRET2

tables

-VBAK TYPE VBAK

These would then have to be translated into:

Import

- MATERIAL_NO --> CHAR 18

Export

-BACK -->

{

TYPE SIGN 1

ID SIGN 20

NUMBER DEC 3

MESSAGE SIGN 220

LOG_NO CHAR 20

LOG_MSG_NO CHAR 6

MESSAGE_V1 CHARACTER 50

MESSAGE_V2 CHARACTER 50

MESSAGE_V3 CHARACTER 50

MESSAGE_V4 CHARACTER 50

PARAMETERS CHAR 32

DEC 10 SERIES

FIELD SIGN 30

SYSTEM CHARACTER 10

}

tables

-VBAK-->

[{

MANDT SIGN 3

VBELN SIGN 10

ERDAT SIGN 8

ORE CHAR 6

ERNAM CHAR 12

ANGDT SIGN 8

BNDDT SIGN 8

AUDAT SIGN 8

VBTYPE CHARACTER 1

TRVOG SIGN 1

}]

To speed that up:

Is there a function module / class to read out the signature of a function module?

The Fubas RFC_GET_FUNCTION_INTERFACE, FUNCTION_IMPORT_INTERFACE, BDL_FUNCTION_INTERFACE_GET are already known, but not sufficient. Unfortunately, it only supplies the highest layer of the function module siganture.

I have seen that there is a way to read the meta data in other middleware system like SAP PI/PO, MuleSoft or IBM WebSphere. I was wondering if they deliver their own interfaces to read this or is there a SAP standard module?

Thank you in advance.

Kind regards,

Martin

Re: Function module to read meta data / signature of function module

Sandra_Rossi — Wed, 13 Apr 2022 09:05:19 GMT

The one which is used implicitly by the RFC Libraries is RFC_METADATA_GET. It gives all information.

Re: Function module to read meta data / signature of function module

martin_reichenecker — Wed, 13 Apr 2022 13:17:17 GMT

sandra.rossi Thank you Sandra, thats exactly what we have been looking for! 🙂

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