ABAP Select data from SAP table QFMMA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QFMMA 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 QFMMA. 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 QFMMA 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_QFMMA TYPE STANDARD TABLE OF QFMMA,
      WA_QFMMA TYPE QFMMA,
      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: <QFMMA> TYPE QFMMA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QFMMA
*  INTO TABLE @DATA(IT_QFMMA2).
*--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_QFMMA INDEX 1 INTO DATA(WA_QFMMA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QFMMA>-QMNUM = 1.
<QFMMA>-FENUM = 1.
<QFMMA>-URNUM = 1.
<QFMMA>-MANUM = 1.
<QFMMA>-MNKAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QFMMA-MNGRP, sy-vline,
  WA_QFMMA-MNCOD, sy-vline,
  WA_QFMMA-MATXT, sy-vline,
  WA_QFMMA-MAKLS, sy-vline,
  WA_QFMMA-KLAKZ, sy-vline,
  WA_QFMMA-INDTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QFMMA 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_QFMMA 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_QFMMA INTO WA_QFMMA.


*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 QMNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QFMMA-QMNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QFMMA-QMNUM.
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_QFMMA_STR, 
QMNUM TYPE STRING,
FENUM TYPE STRING,
URNUM TYPE STRING,
MANUM TYPE STRING,
MNKAT TYPE STRING,
MNGRP TYPE STRING,
MNCOD TYPE STRING,
MATXT TYPE STRING,
MAKLS TYPE STRING,
KLAKZ TYPE STRING,
INDTX TYPE STRING,
KZMLA TYPE STRING,
MNGFA TYPE STRING,
TXTCD TYPE STRING,
TXTGR TYPE STRING,
TXTCDGR TYPE STRING,
AEKNZ TYPE STRING,
CONTROL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QFMMA_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_QFMMA_STR-QMNUM sy-vline 
WA_QFMMA_STR-FENUM sy-vline 
WA_QFMMA_STR-URNUM sy-vline 
WA_QFMMA_STR-MANUM sy-vline 
WA_QFMMA_STR-MNKAT sy-vline 
WA_QFMMA_STR-MNGRP sy-vline 
WA_QFMMA_STR-MNCOD sy-vline 
WA_QFMMA_STR-MATXT sy-vline 
WA_QFMMA_STR-MAKLS sy-vline 
WA_QFMMA_STR-KLAKZ sy-vline 
WA_QFMMA_STR-INDTX sy-vline 
WA_QFMMA_STR-KZMLA sy-vline 
WA_QFMMA_STR-MNGFA sy-vline 
WA_QFMMA_STR-TXTCD sy-vline 
WA_QFMMA_STR-TXTGR sy-vline 
WA_QFMMA_STR-TXTCDGR sy-vline 
WA_QFMMA_STR-AEKNZ sy-vline 
WA_QFMMA_STR-CONTROL sy-vline      INTO ld_text SEPARATED BY SPACE.

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