A question about parameter passing in Function Call

Former Member — Wed, 12 Sep 2012 03:36:31 GMT

Hello Expert,

In our system, there is on Function which is defined as below:

*--------------------------------------------------------------------------------------------------*
* generator called from SAPMKEA3_NEW                                                              *
* by user XXXXXX                                                                                *
* Date: 20.04.2009 Time: 11:00:48                                                                *
* Release: 600        Version: 029                                                                *
* template program RKEVRK1V                                                                        *
*--------------------------------------------------------------------------------------------------*

FUNCTION RKE_WRITE_ACT_LINE_ITEM_1000.
*"----------------------------------------------------------------------
*"*"Verbuchungsfunktionsbaustein:
*"
*"*"Lokale Schnittstelle:
*" IMPORTING
*"    VALUE(I_SCHEDMAN_KEY) LIKE SCHEDMAN_KEY STRUCTURE SCHEDMAN_KEY
*"      OPTIONAL
*" TABLES
*"      LINE_ITEM_TAB STRUCTURE CE11000
*"----------------------------------------------------------------------

PERFORM WRITE_ACT_LINE_ITEM(RK2A1000_UPDATE)
                                  USING    I_SCHEDMAN_KEY
                                  CHANGING LINE_ITEM_TAB[].

ENDFUNCTION.

In dubugging mode, the function is called via dynamic statement

PERFORM (VBFUNC) IN PROGRAM (TFDIR-PNAME) USING VBID.

The value of each parameter is as below:

VBFUNC: RKE_WRITE_ACT_LINE_ITEM_1000

TFDIR-PNAME: SAPLKEV1

VBID-TIMESTAMP: 504F19F060AE29D0E10080000A19031E

VBID-ID: 1

In debugging mode, I find internal table LINE_ITEM_TAB has two records. My question is, since the calling program doesn't pass the parameter to LINE_ITEM_TAB, why the internal table has two records? Where they come from?

Debug screenshot is also attached.

Can any expert explain to me?

Thanks in advance,

Best Regards,

Johnny.

Re: A question about parameter passing in Function Call

RaymondGiuseppi — Wed, 12 Sep 2012 08:44:42 GMT

No the perform doesn't call the FM it call a FORM which itself call the FM, check source code of the form RKE_WRITE_ACT_LINE_ITEM_1000 in program SAPLKEV1 (function group), it should "recover" data from the VBID structure. (As it is a generated function group I cannot check on my system)

Regards,

Raymond

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A question about parameter passing in Function Call

Re: A question about parameter passing in Function Call