ABAP Select data from SAP table WTYBRF_MWTY_CTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WTYBRF_MWTY_CTR
*  INTO TABLE @DATA(IT_WTYBRF_MWTY_CTR2).
*--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_WTYBRF_MWTY_CTR INDEX 1 INTO DATA(WA_WTYBRF_MWTY_CTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WTYBRF_MWTY_CTR>-HANDLE = 1.
<WTYBRF_MWTY_CTR>-PNGUID = 1.
<WTYBRF_MWTY_CTR>-MANDT = 1.
<WTYBRF_MWTY_CTR>-MGANR = 1.
<WTYBRF_MWTY_CTR>-POSNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WTYBRF_MWTY_CTR-GAZPS, sy-vline,
  WA_WTYBRF_MWTY_CTR-GAZNA, sy-vline,
  WA_WTYBRF_MWTY_CTR-GAZAL, sy-vline,
  WA_WTYBRF_MWTY_CTR-RANGF, sy-vline,
  WA_WTYBRF_MWTY_CTR-GAZWT, sy-vline,
  WA_WTYBRF_MWTY_CTR-GAZWTI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WTYBRF_MWTY_CTR 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_WTYBRF_MWTY_CTR 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_WTYBRF_MWTY_CTR INTO WA_WTYBRF_MWTY_CTR.


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

*Conversion exit CUNIT, internal->external for field RECDU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WTYBRF_MWTY_CTR-RECDU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WTYBRF_MWTY_CTR-RECDU.
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_WTYBRF_MWTY_CTR_STR, 
HANDLE TYPE STRING,
PNGUID TYPE STRING,
MANDT TYPE STRING,
MGANR TYPE STRING,
POSNM TYPE STRING,
GAZPS TYPE STRING,
GAZNA TYPE STRING,
GAZAL TYPE STRING,
RANGF TYPE STRING,
GAZWT TYPE STRING,
GAZWTI TYPE STRING,
GAZWV TYPE STRING,
GAZWVI TYPE STRING,
DELTA TYPE STRING,
DELTAI TYPE STRING,
RECDU TYPE STRING,
EXPON TYPE STRING,
DECIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WTYBRF_MWTY_CTR_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_WTYBRF_MWTY_CTR_STR-HANDLE sy-vline 
WA_WTYBRF_MWTY_CTR_STR-PNGUID sy-vline 
WA_WTYBRF_MWTY_CTR_STR-MANDT sy-vline 
WA_WTYBRF_MWTY_CTR_STR-MGANR sy-vline 
WA_WTYBRF_MWTY_CTR_STR-POSNM sy-vline 
WA_WTYBRF_MWTY_CTR_STR-GAZPS sy-vline 
WA_WTYBRF_MWTY_CTR_STR-GAZNA sy-vline 
WA_WTYBRF_MWTY_CTR_STR-GAZAL sy-vline 
WA_WTYBRF_MWTY_CTR_STR-RANGF sy-vline 
WA_WTYBRF_MWTY_CTR_STR-GAZWT sy-vline 
WA_WTYBRF_MWTY_CTR_STR-GAZWTI sy-vline 
WA_WTYBRF_MWTY_CTR_STR-GAZWV sy-vline 
WA_WTYBRF_MWTY_CTR_STR-GAZWVI sy-vline 
WA_WTYBRF_MWTY_CTR_STR-DELTA sy-vline 
WA_WTYBRF_MWTY_CTR_STR-DELTAI sy-vline 
WA_WTYBRF_MWTY_CTR_STR-RECDU sy-vline 
WA_WTYBRF_MWTY_CTR_STR-EXPON sy-vline 
WA_WTYBRF_MWTY_CTR_STR-DECIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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