ABAP Select data from SAP table RFFMFGAPCRN_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFFMFGAPCRN_ALV table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to RFFMFGAPCRN_ALV. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the RFFMFGAPCRN_ALV table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_RFFMFGAPCRN_ALV TYPE STANDARD TABLE OF RFFMFGAPCRN_ALV,
      WA_RFFMFGAPCRN_ALV TYPE RFFMFGAPCRN_ALV,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <RFFMFGAPCRN_ALV> TYPE RFFMFGAPCRN_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFFMFGAPCRN_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFFMFGAPCRN_ALV
  INTO TABLE IT_RFFMFGAPCRN_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFFMFGAPCRN_ALV
*  INTO TABLE @DATA(IT_RFFMFGAPCRN_ALV2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_RFFMFGAPCRN_ALV INDEX 1 INTO DATA(WA_RFFMFGAPCRN_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFFMFGAPCRN_ALV ASSIGNING <RFFMFGAPCRN_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFFMFGAPCRN_ALV>-EBELN = 1.
<RFFMFGAPCRN_ALV>-EBELP = 1.
<RFFMFGAPCRN_ALV>-MSGTYP = 1.
<RFFMFGAPCRN_ALV>-ANLN1 = 1.
<RFFMFGAPCRN_ALV>-ANLN2 = 1.

ENDLOOP.

LOOP AT IT_RFFMFGAPCRN_ALV INTO WA_RFFMFGAPCRN_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFFMFGAPCRN_ALV-BUKRS, sy-vline,
  WA_RFFMFGAPCRN_ALV-VALUE, sy-vline,
  WA_RFFMFGAPCRN_ALV-IDNUM, sy-vline,
  WA_RFFMFGAPCRN_ALV-OUTTYP, sy-vline,
  WA_RFFMFGAPCRN_ALV-MSGTXT, sy-vline,
  WA_RFFMFGAPCRN_ALV-MSGVAR1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFFMFGAPCRN_ALV you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_RFFMFGAPCRN_ALV TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_RFFMFGAPCRN_ALV INTO WA_RFFMFGAPCRN_ALV.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFFMFGAPCRN_ALV-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFFMFGAPCRN_ALV-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFFMFGAPCRN_ALV-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFFMFGAPCRN_ALV-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFFMFGAPCRN_ALV-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFFMFGAPCRN_ALV-ANLN2.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFFMFGAPCRN_ALV_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
MSGTYP TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
BUKRS TYPE STRING,
VALUE TYPE STRING,
IDNUM TYPE STRING,
OUTTYP TYPE STRING,
MSGTXT TYPE STRING,
MSGVAR1 TYPE STRING,
MSGVAR2 TYPE STRING,
MSGVAR3 TYPE STRING,
MSGVAR4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFFMFGAPCRN_ALV_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_RFFMFGAPCRN_ALV_STR-EBELN sy-vline 
WA_RFFMFGAPCRN_ALV_STR-EBELP sy-vline 
WA_RFFMFGAPCRN_ALV_STR-MSGTYP sy-vline 
WA_RFFMFGAPCRN_ALV_STR-ANLN1 sy-vline 
WA_RFFMFGAPCRN_ALV_STR-ANLN2 sy-vline 
WA_RFFMFGAPCRN_ALV_STR-BUKRS sy-vline 
WA_RFFMFGAPCRN_ALV_STR-VALUE sy-vline 
WA_RFFMFGAPCRN_ALV_STR-IDNUM sy-vline 
WA_RFFMFGAPCRN_ALV_STR-OUTTYP sy-vline 
WA_RFFMFGAPCRN_ALV_STR-MSGTXT sy-vline 
WA_RFFMFGAPCRN_ALV_STR-MSGVAR1 sy-vline 
WA_RFFMFGAPCRN_ALV_STR-MSGVAR2 sy-vline 
WA_RFFMFGAPCRN_ALV_STR-MSGVAR3 sy-vline 
WA_RFFMFGAPCRN_ALV_STR-MSGVAR4 sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.