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A qRFC call is executed in different variants. To ensure efficient qRFC communication it is important that the data is assigned to a correct queue.

The following qRFC variants are possible:

  • A LUW contains qRFC calls with the same destination.

  • A LUW contains qRFC calls with the different destinations.

  • A LUW contains both qRFC and tRFC calls with the same or different destinations (mixed mode).

  • A LUW contains qRFC calls that are not sent but are to be called at a specific time by a local or remote application (NOSEND scenario).

Note the following to ensure that the LUW is assigned correctly for each of these variants:

  • Each application LUW begins with the first (CALL FUNCTION … IN BACKGROUND TASK) tRFC call and finishes with the first COMMIT WORK

  • Each LUW can contain various sub-LUWs.

  • A sub-LUW contains:

    • A tRFC call if the AS SEPARATE UNIT statement was used.

      Caution Caution

      Take care when using a tRFC call with the AS SEPARATE UNIT statement. Each tRFC call with this option represents an independent LUW and does not have its own context.

      End of the caution.
    • An own transaction ID (TID).

  • The qRFC Manager groups the LUWs together by destination, and processes them independently of each other. If a qRFC call contains LUWs with different destination, these are assigned different sub-LUWs. No serialization takes place between the individual sub-LUWs in this case.

    Caution Caution

    A serialization only takes place when multiple LUWs are assigned to the same destination and the same queue name.

    End of the caution.
  • A LUW can contain both tRFC calls and qRFC calls (mixed mode).

  • A transaction can contain both dialog steps and update tasks. This affects the serialization behavior.

More Information

For more information on qRFC variants: