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RFC - Remote Function Call →
RFC Overview →
RFC Restrictions
In contrast to the normal function module call, the following restrictions apply to an RFC:
- A database commit is performed in every call that uses
synchronous and asynchronous RFC. For this reason, synchronous or asynchronous RFC must not be used between Open SQL statements that open or close a
database cursor. An exception to this are
updates. When updates are running,
sRFC and
aRFC do not cause work processes to be switched or database commits to be executed.
- In a remotely called function module, you cannot use statements that close the current
context and, in doing so, the connection. An example
of this is the statement LEAVE PROGRAM, or SUBMIT without the addition RETURN.
- As only pass by value is used for the RFC, when exceptions do occur, you can never access interim
results when a synchronous RFC is made. TABLES parameters are an exception
to this. When the exception SYSTEM_FAILURE is raised, these parameters behave in the same way as when
the function module is executed locally, in which case they are passed by reference. The data held by a parameter of this type before the exception is passed to the client.