ABAP Select data from SAP table QMFEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QMFEL
*  INTO TABLE @DATA(IT_QMFEL2).
*--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_QMFEL INDEX 1 INTO DATA(WA_QMFEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QMFEL>-MANDT = 1.
<QMFEL>-QMNUM = 1.
<QMFEL>-FENUM = 1.
<QMFEL>-PRUEFLOS = 1.
<QMFEL>-VORGLFNR_HEAD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QMFEL-VORGLFNR, sy-vline,
  WA_QMFEL-MERKNR, sy-vline,
  WA_QMFEL-PROBENR, sy-vline,
  WA_QMFEL-SERIALNR, sy-vline,
  WA_QMFEL-ERNAM, sy-vline,
  WA_QMFEL-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QMFEL 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_QMFEL 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_QMFEL INTO WA_QMFEL.


*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_QMFEL-QMNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QMFEL-QMNUM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GERNR, internal->external for field SERIALNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_QMFEL-SERIALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QMFEL-SERIALNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field BAUTL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_QMFEL-BAUTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QMFEL-BAUTL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field FMGEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_QMFEL-FMGEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QMFEL-FMGEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITFLBEW
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_QMFEL-UNITFLBEW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QMFEL-UNITFLBEW.
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_QMFEL_STR, 
MANDT TYPE STRING,
QMNUM TYPE STRING,
FENUM TYPE STRING,
PRUEFLOS TYPE STRING,
VORGLFNR_HEAD TYPE STRING,
VORGLFNR TYPE STRING,
MERKNR TYPE STRING,
PROBENR TYPE STRING,
SERIALNR TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
FETXT TYPE STRING,
FEKAT TYPE STRING,
FEGRP TYPE STRING,
FECOD TYPE STRING,
FEVER TYPE STRING,
OTKAT TYPE STRING,
OTGRP TYPE STRING,
OTEIL TYPE STRING,
OTVER TYPE STRING,
BAUTL TYPE STRING,
EBORT TYPE STRING,
INDTX TYPE STRING,
KZMLA TYPE STRING,
ERZEIT TYPE STRING,
AEZEIT TYPE STRING,
KZORG TYPE STRING,
WDFEH TYPE STRING,
FEQKLAS TYPE STRING,
FCOAUFNR TYPE STRING,
FMGFRD TYPE STRING,
FMGEIG TYPE STRING,
FMGEIN TYPE STRING,
ANZFEHLER TYPE STRING,
FEHLBEW TYPE STRING,
UNITFLBEW TYPE STRING,
FENUMORG TYPE STRING,
KZSYSFE TYPE STRING,
KZLOESCH TYPE STRING,
POSNR TYPE STRING,
HERPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QMFEL_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_QMFEL_STR-MANDT sy-vline 
WA_QMFEL_STR-QMNUM sy-vline 
WA_QMFEL_STR-FENUM sy-vline 
WA_QMFEL_STR-PRUEFLOS sy-vline 
WA_QMFEL_STR-VORGLFNR_HEAD sy-vline 
WA_QMFEL_STR-VORGLFNR sy-vline 
WA_QMFEL_STR-MERKNR sy-vline 
WA_QMFEL_STR-PROBENR sy-vline 
WA_QMFEL_STR-SERIALNR sy-vline 
WA_QMFEL_STR-ERNAM sy-vline 
WA_QMFEL_STR-ERDAT sy-vline 
WA_QMFEL_STR-AENAM sy-vline 
WA_QMFEL_STR-AEDAT sy-vline 
WA_QMFEL_STR-FETXT sy-vline 
WA_QMFEL_STR-FEKAT sy-vline 
WA_QMFEL_STR-FEGRP sy-vline 
WA_QMFEL_STR-FECOD sy-vline 
WA_QMFEL_STR-FEVER sy-vline 
WA_QMFEL_STR-OTKAT sy-vline 
WA_QMFEL_STR-OTGRP sy-vline 
WA_QMFEL_STR-OTEIL sy-vline 
WA_QMFEL_STR-OTVER sy-vline 
WA_QMFEL_STR-BAUTL sy-vline 
WA_QMFEL_STR-EBORT sy-vline 
WA_QMFEL_STR-INDTX sy-vline 
WA_QMFEL_STR-KZMLA sy-vline 
WA_QMFEL_STR-ERZEIT sy-vline 
WA_QMFEL_STR-AEZEIT sy-vline 
WA_QMFEL_STR-KZORG sy-vline 
WA_QMFEL_STR-WDFEH sy-vline 
WA_QMFEL_STR-FEQKLAS sy-vline 
WA_QMFEL_STR-FCOAUFNR sy-vline 
WA_QMFEL_STR-FMGFRD sy-vline 
WA_QMFEL_STR-FMGEIG sy-vline 
WA_QMFEL_STR-FMGEIN sy-vline 
WA_QMFEL_STR-ANZFEHLER sy-vline 
WA_QMFEL_STR-FEHLBEW sy-vline 
WA_QMFEL_STR-UNITFLBEW sy-vline 
WA_QMFEL_STR-FENUMORG sy-vline 
WA_QMFEL_STR-KZSYSFE sy-vline 
WA_QMFEL_STR-KZLOESCH sy-vline 
WA_QMFEL_STR-POSNR sy-vline 
WA_QMFEL_STR-HERPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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