ABAP Select data from SAP table MCBW_ZUSA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCBW_ZUSA
*  INTO TABLE @DATA(IT_MCBW_ZUSA2).
*--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_MCBW_ZUSA INDEX 1 INTO DATA(WA_MCBW_ZUSA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCBW_ZUSA>-BWBELN = 1.
<MCBW_ZUSA>-BWBLPOS = 1.
<MCBW_ZUSA>-BWEINT = 1.
<MCBW_ZUSA>-BWMNG = 1.
<MCBW_ZUSA>-BWMBE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCBW_ZUSA-BWAPPLNM, sy-vline,
  WA_MCBW_ZUSA-BWDMBE, sy-vline,
  WA_MCBW_ZUSA-BWANZ, sy-vline,
  WA_MCBW_ZUSA-BWBLTYP, sy-vline,
  WA_MCBW_ZUSA-BWBLART, sy-vline,
  WA_MCBW_ZUSA-BWBTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCBW_ZUSA 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_MCBW_ZUSA 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_MCBW_ZUSA INTO WA_MCBW_ZUSA.


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

*Conversion exit AUART, internal->external for field BWBLART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_MCBW_ZUSA-BWBLART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCBW_ZUSA-BWBLART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field BWBJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MCBW_ZUSA-BWBJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCBW_ZUSA-BWBJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field BWKAPRN
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_MCBW_ZUSA-BWKAPRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCBW_ZUSA-BWKAPRN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSN, internal->external for field PS_POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_MCBW_ZUSA-PS_POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCBW_ZUSA-PS_POSID.
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_MCBW_ZUSA_STR, 
BWBELN TYPE STRING,
BWBLPOS TYPE STRING,
BWEINT TYPE STRING,
BWMNG TYPE STRING,
BWMBE TYPE STRING,
BWAPPLNM TYPE STRING,
BWDMBE TYPE STRING,
BWANZ TYPE STRING,
BWBLTYP TYPE STRING,
BWBLART TYPE STRING,
BWBTYP TYPE STRING,
BWBJAHR TYPE STRING,
CHAR03 TYPE STRING,
VOGRU TYPE STRING,
BWGEOO TYPE STRING,
BWGEOD TYPE STRING,
BWGVOD TYPE STRING,
BWGVPD TYPE STRING,
BWPNLD TYPE STRING,
BWGEO TYPE STRING,
BWGVO TYPE STRING,
BWGVP TYPE STRING,
BWOAUMV TYPE STRING,
BWOAUWD TYPE STRING,
BWMATKL TYPE STRING,
BWKAPRN TYPE STRING,
BWKULIF TYPE STRING,
PS_POSID TYPE STRING,
BWGHLP TYPE STRING,
BWINDUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCBW_ZUSA_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_MCBW_ZUSA_STR-BWBELN sy-vline 
WA_MCBW_ZUSA_STR-BWBLPOS sy-vline 
WA_MCBW_ZUSA_STR-BWEINT sy-vline 
WA_MCBW_ZUSA_STR-BWMNG sy-vline 
WA_MCBW_ZUSA_STR-BWMBE sy-vline 
WA_MCBW_ZUSA_STR-BWAPPLNM sy-vline 
WA_MCBW_ZUSA_STR-BWDMBE sy-vline 
WA_MCBW_ZUSA_STR-BWANZ sy-vline 
WA_MCBW_ZUSA_STR-BWBLTYP sy-vline 
WA_MCBW_ZUSA_STR-BWBLART sy-vline 
WA_MCBW_ZUSA_STR-BWBTYP sy-vline 
WA_MCBW_ZUSA_STR-BWBJAHR sy-vline 
WA_MCBW_ZUSA_STR-CHAR03 sy-vline 
WA_MCBW_ZUSA_STR-VOGRU sy-vline 
WA_MCBW_ZUSA_STR-BWGEOO sy-vline 
WA_MCBW_ZUSA_STR-BWGEOD sy-vline 
WA_MCBW_ZUSA_STR-BWGVOD sy-vline 
WA_MCBW_ZUSA_STR-BWGVPD sy-vline 
WA_MCBW_ZUSA_STR-BWPNLD sy-vline 
WA_MCBW_ZUSA_STR-BWGEO sy-vline 
WA_MCBW_ZUSA_STR-BWGVO sy-vline 
WA_MCBW_ZUSA_STR-BWGVP sy-vline 
WA_MCBW_ZUSA_STR-BWOAUMV sy-vline 
WA_MCBW_ZUSA_STR-BWOAUWD sy-vline 
WA_MCBW_ZUSA_STR-BWMATKL sy-vline 
WA_MCBW_ZUSA_STR-BWKAPRN sy-vline 
WA_MCBW_ZUSA_STR-BWKULIF sy-vline 
WA_MCBW_ZUSA_STR-PS_POSID sy-vline 
WA_MCBW_ZUSA_STR-BWGHLP sy-vline 
WA_MCBW_ZUSA_STR-BWINDUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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