ABAP Select data from SAP table MCWBRKLB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCWBRKLB
*  INTO TABLE @DATA(IT_MCWBRKLB2).
*--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_MCWBRKLB INDEX 1 INTO DATA(WA_MCWBRKLB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCWBRKLB>-SUPKZ = 1.
<MCWBRKLB>-WBELN_L = 1.
<MCWBRKLB>-POSNR_L = 1.
<MCWBRKLB>-WBELNL_L = 1.
<MCWBRKLB>-LFART_L = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCWBRKLB-WRART_L, sy-vline,
  WA_MCWBRKLB-WFDAT_L, sy-vline,
  WA_MCWBRKLB-ERDAT_L, sy-vline,
  WA_MCWBRKLB-ZTERM_L, sy-vline,
  WA_MCWBRKLB-ZTERMD_L, sy-vline,
  WA_MCWBRKLB-ZBD1T_L, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCWBRKLB 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_MCWBRKLB 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_MCWBRKLB INTO WA_MCWBRKLB.


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

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

*Conversion exit EXCRT, internal->external for field WKURS_P1_L
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCWBRKLB-WKURS_P1_L
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCWBRKLB-WKURS_P1_L.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS_P2_L
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCWBRKLB-WKURS_P2_L
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCWBRKLB-WKURS_P2_L.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS_L
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCWBRKLB-WKURS_L
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCWBRKLB-WKURS_L.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field LFAKS_L
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCWBRKLB-LFAKS_L
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCWBRKLB-LFAKS_L.
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_MCWBRKLB_STR, 
SUPKZ TYPE STRING,
WBELN_L TYPE STRING,
POSNR_L TYPE STRING,
WBELNL_L TYPE STRING,
LFART_L TYPE STRING,
WRART_L TYPE STRING,
WFDAT_L TYPE STRING,
ERDAT_L TYPE STRING,
ZTERM_L TYPE STRING,
ZTERMD_L TYPE STRING,
ZBD1T_L TYPE STRING,
ZBD1P_L TYPE STRING,
ZBD2T_L TYPE STRING,
ZBD2P_L TYPE STRING,
ZBD3T_L TYPE STRING,
ZLSCH_L TYPE STRING,
ZBD1TD_L TYPE STRING,
ZBD1PD_L TYPE STRING,
ZBD2TD_L TYPE STRING,
ZBD2PD_L TYPE STRING,
ZBD3TD_L TYPE STRING,
ZLSCHD_L TYPE STRING,
VALDT_L TYPE STRING,
VALTG_L TYPE STRING,
VALTGD_L TYPE STRING,
VALDTD_L TYPE STRING,
WKURS_P1_L TYPE STRING,
WKURS_P2_L TYPE STRING,
WPYCUR_P1_L TYPE STRING,
WPYCUR_P2_L TYPE STRING,
WKURS_DAT_L TYPE STRING,
WKURS_L TYPE STRING,
WAERL_L TYPE STRING,
KUNRE_L TYPE STRING,
KUNRG_L TYPE STRING,
XBLNR_L TYPE STRING,
KIDNO_L TYPE STRING,
ZUONR_L TYPE STRING,
RFBSK_L TYPE STRING,
ABART_L TYPE STRING,
LIFRE_L TYPE STRING,
LNRZB_L TYPE STRING,
LFGRU_L TYPE STRING,
WDTYP_L TYPE STRING,
ESTATUS_L TYPE STRING,
FKSTO_PART_L TYPE STRING,
FKSTO_PARTY_L TYPE STRING,
POST_PARTY_L TYPE STRING,
LFAKS_L TYPE STRING,
FKSTO_L TYPE STRING,
UPDKZ_L TYPE STRING,
LANDTX_L TYPE STRING,
LAND1TX_L TYPE STRING,
LANDTX_BUKRS_L TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCWBRKLB_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_MCWBRKLB_STR-SUPKZ sy-vline 
WA_MCWBRKLB_STR-WBELN_L sy-vline 
WA_MCWBRKLB_STR-POSNR_L sy-vline 
WA_MCWBRKLB_STR-WBELNL_L sy-vline 
WA_MCWBRKLB_STR-LFART_L sy-vline 
WA_MCWBRKLB_STR-WRART_L sy-vline 
WA_MCWBRKLB_STR-WFDAT_L sy-vline 
WA_MCWBRKLB_STR-ERDAT_L sy-vline 
WA_MCWBRKLB_STR-ZTERM_L sy-vline 
WA_MCWBRKLB_STR-ZTERMD_L sy-vline 
WA_MCWBRKLB_STR-ZBD1T_L sy-vline 
WA_MCWBRKLB_STR-ZBD1P_L sy-vline 
WA_MCWBRKLB_STR-ZBD2T_L sy-vline 
WA_MCWBRKLB_STR-ZBD2P_L sy-vline 
WA_MCWBRKLB_STR-ZBD3T_L sy-vline 
WA_MCWBRKLB_STR-ZLSCH_L sy-vline 
WA_MCWBRKLB_STR-ZBD1TD_L sy-vline 
WA_MCWBRKLB_STR-ZBD1PD_L sy-vline 
WA_MCWBRKLB_STR-ZBD2TD_L sy-vline 
WA_MCWBRKLB_STR-ZBD2PD_L sy-vline 
WA_MCWBRKLB_STR-ZBD3TD_L sy-vline 
WA_MCWBRKLB_STR-ZLSCHD_L sy-vline 
WA_MCWBRKLB_STR-VALDT_L sy-vline 
WA_MCWBRKLB_STR-VALTG_L sy-vline 
WA_MCWBRKLB_STR-VALTGD_L sy-vline 
WA_MCWBRKLB_STR-VALDTD_L sy-vline 
WA_MCWBRKLB_STR-WKURS_P1_L sy-vline 
WA_MCWBRKLB_STR-WKURS_P2_L sy-vline 
WA_MCWBRKLB_STR-WPYCUR_P1_L sy-vline 
WA_MCWBRKLB_STR-WPYCUR_P2_L sy-vline 
WA_MCWBRKLB_STR-WKURS_DAT_L sy-vline 
WA_MCWBRKLB_STR-WKURS_L sy-vline 
WA_MCWBRKLB_STR-WAERL_L sy-vline 
WA_MCWBRKLB_STR-KUNRE_L sy-vline 
WA_MCWBRKLB_STR-KUNRG_L sy-vline 
WA_MCWBRKLB_STR-XBLNR_L sy-vline 
WA_MCWBRKLB_STR-KIDNO_L sy-vline 
WA_MCWBRKLB_STR-ZUONR_L sy-vline 
WA_MCWBRKLB_STR-RFBSK_L sy-vline 
WA_MCWBRKLB_STR-ABART_L sy-vline 
WA_MCWBRKLB_STR-LIFRE_L sy-vline 
WA_MCWBRKLB_STR-LNRZB_L sy-vline 
WA_MCWBRKLB_STR-LFGRU_L sy-vline 
WA_MCWBRKLB_STR-WDTYP_L sy-vline 
WA_MCWBRKLB_STR-ESTATUS_L sy-vline 
WA_MCWBRKLB_STR-FKSTO_PART_L sy-vline 
WA_MCWBRKLB_STR-FKSTO_PARTY_L sy-vline 
WA_MCWBRKLB_STR-POST_PARTY_L sy-vline 
WA_MCWBRKLB_STR-LFAKS_L sy-vline 
WA_MCWBRKLB_STR-FKSTO_L sy-vline 
WA_MCWBRKLB_STR-UPDKZ_L sy-vline 
WA_MCWBRKLB_STR-LANDTX_L sy-vline 
WA_MCWBRKLB_STR-LAND1TX_L sy-vline 
WA_MCWBRKLB_STR-LANDTX_BUKRS_L sy-vline      INTO ld_text SEPARATED BY SPACE.

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