ABAP Select data from SAP table MCQAVEB_BW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCQAVEB_BW
*  INTO TABLE @DATA(IT_MCQAVEB_BW2).
*--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_MCQAVEB_BW INDEX 1 INTO DATA(WA_MCQAVEB_BW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCQAVEB_BW>-ROCANCEL = 1.
<MCQAVEB_BW>-MANDANT = 1.
<MCQAVEB_BW>-PRUEFLOS = 1.
<MCQAVEB_BW>-KZART = 1.
<MCQAVEB_BW>-ZAEHLER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCQAVEB_BW-VKATART, sy-vline,
  WA_MCQAVEB_BW-VWERKS, sy-vline,
  WA_MCQAVEB_BW-VAUSWAHLMG, sy-vline,
  WA_MCQAVEB_BW-VCODEGRP, sy-vline,
  WA_MCQAVEB_BW-VCODE, sy-vline,
  WA_MCQAVEB_BW-VERSIONAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCQAVEB_BW 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_MCQAVEB_BW 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_MCQAVEB_BW INTO WA_MCQAVEB_BW.


*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 PRUEFLOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCQAVEB_BW-PRUEFLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCQAVEB_BW-PRUEFLOS.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field EINHTAG
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCQAVEB_BW-EINHTAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCQAVEB_BW-EINHTAG.
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_MCQAVEB_BW_STR, 
ROCANCEL TYPE STRING,
MANDANT TYPE STRING,
PRUEFLOS TYPE STRING,
KZART TYPE STRING,
ZAEHLER TYPE STRING,
VKATART TYPE STRING,
VWERKS TYPE STRING,
VAUSWAHLMG TYPE STRING,
VCODEGRP TYPE STRING,
VCODE TYPE STRING,
VERSIONAM TYPE STRING,
VERSIONCD TYPE STRING,
VBEWERTUNG TYPE STRING,
DBEWERTUNG TYPE STRING,
VFOLGEAKTI TYPE STRING,
QKENNZAHL TYPE STRING,
LTEXTKZ TYPE STRING,
VNAME TYPE STRING,
VDATUM TYPE STRING,
VEZEITERF TYPE STRING,
VAENAME TYPE STRING,
VAEDATUM TYPE STRING,
VEZEITAEN TYPE STRING,
STAFO TYPE STRING,
TEILLOS TYPE STRING,
VORGLFNR TYPE STRING,
QFOL_UP_EXE TYPE STRING,
DUMMY_QAVE_INCL_EEW_PS TYPE STRING,
ANTEIL TYPE STRING,
LMENGE01 TYPE STRING,
LMENGE02 TYPE STRING,
LMENGE03 TYPE STRING,
LMENGE04 TYPE STRING,
LMENGE05 TYPE STRING,
LMENGE06 TYPE STRING,
LMENGE07 TYPE STRING,
LMENGEZUB TYPE STRING,
LMENGELZ TYPE STRING,
LMENGEPR TYPE STRING,
LMENGEZER TYPE STRING,
LMENGESCH TYPE STRING,
EINHPROBE TYPE STRING,
ZHLQAVE_ACC TYPE STRING,
ZHLQAVE_REJ TYPE STRING,
QTYQAVE_ACC TYPE STRING,
QTYQAVE_REJ TYPE STRING,
DURATION_INT TYPE STRING,
DURATION_EXT TYPE STRING,
EINHTAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCQAVEB_BW_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_MCQAVEB_BW_STR-ROCANCEL sy-vline 
WA_MCQAVEB_BW_STR-MANDANT sy-vline 
WA_MCQAVEB_BW_STR-PRUEFLOS sy-vline 
WA_MCQAVEB_BW_STR-KZART sy-vline 
WA_MCQAVEB_BW_STR-ZAEHLER sy-vline 
WA_MCQAVEB_BW_STR-VKATART sy-vline 
WA_MCQAVEB_BW_STR-VWERKS sy-vline 
WA_MCQAVEB_BW_STR-VAUSWAHLMG sy-vline 
WA_MCQAVEB_BW_STR-VCODEGRP sy-vline 
WA_MCQAVEB_BW_STR-VCODE sy-vline 
WA_MCQAVEB_BW_STR-VERSIONAM sy-vline 
WA_MCQAVEB_BW_STR-VERSIONCD sy-vline 
WA_MCQAVEB_BW_STR-VBEWERTUNG sy-vline 
WA_MCQAVEB_BW_STR-DBEWERTUNG sy-vline 
WA_MCQAVEB_BW_STR-VFOLGEAKTI sy-vline 
WA_MCQAVEB_BW_STR-QKENNZAHL sy-vline 
WA_MCQAVEB_BW_STR-LTEXTKZ sy-vline 
WA_MCQAVEB_BW_STR-VNAME sy-vline 
WA_MCQAVEB_BW_STR-VDATUM sy-vline 
WA_MCQAVEB_BW_STR-VEZEITERF sy-vline 
WA_MCQAVEB_BW_STR-VAENAME sy-vline 
WA_MCQAVEB_BW_STR-VAEDATUM sy-vline 
WA_MCQAVEB_BW_STR-VEZEITAEN sy-vline 
WA_MCQAVEB_BW_STR-STAFO sy-vline 
WA_MCQAVEB_BW_STR-TEILLOS sy-vline 
WA_MCQAVEB_BW_STR-VORGLFNR sy-vline 
WA_MCQAVEB_BW_STR-QFOL_UP_EXE sy-vline 
WA_MCQAVEB_BW_STR-DUMMY_QAVE_INCL_EEW_PS sy-vline 
WA_MCQAVEB_BW_STR-ANTEIL sy-vline 
WA_MCQAVEB_BW_STR-LMENGE01 sy-vline 
WA_MCQAVEB_BW_STR-LMENGE02 sy-vline 
WA_MCQAVEB_BW_STR-LMENGE03 sy-vline 
WA_MCQAVEB_BW_STR-LMENGE04 sy-vline 
WA_MCQAVEB_BW_STR-LMENGE05 sy-vline 
WA_MCQAVEB_BW_STR-LMENGE06 sy-vline 
WA_MCQAVEB_BW_STR-LMENGE07 sy-vline 
WA_MCQAVEB_BW_STR-LMENGEZUB sy-vline 
WA_MCQAVEB_BW_STR-LMENGELZ sy-vline 
WA_MCQAVEB_BW_STR-LMENGEPR sy-vline 
WA_MCQAVEB_BW_STR-LMENGEZER sy-vline 
WA_MCQAVEB_BW_STR-LMENGESCH sy-vline 
WA_MCQAVEB_BW_STR-EINHPROBE sy-vline 
WA_MCQAVEB_BW_STR-ZHLQAVE_ACC sy-vline 
WA_MCQAVEB_BW_STR-ZHLQAVE_REJ sy-vline 
WA_MCQAVEB_BW_STR-QTYQAVE_ACC sy-vline 
WA_MCQAVEB_BW_STR-QTYQAVE_REJ sy-vline 
WA_MCQAVEB_BW_STR-DURATION_INT sy-vline 
WA_MCQAVEB_BW_STR-DURATION_EXT sy-vline 
WA_MCQAVEB_BW_STR-EINHTAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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