ABAP Select data from SAP table TXW_BWPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_BWPOS
*  INTO TABLE @DATA(IT_TXW_BWPOS2).
*--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_TXW_BWPOS INDEX 1 INTO DATA(WA_TXW_BWPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_BWPOS>-MANDT = 1.
<TXW_BWPOS>-LAUFD = 1.
<TXW_BWPOS>-LAUFI = 1.
<TXW_BWPOS>-UMBWM = 1.
<TXW_BWPOS>-ZBUKR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_BWPOS-GRUPPE, sy-vline,
  WA_TXW_BWPOS-KOART, sy-vline,
  WA_TXW_BWPOS-KUNNR, sy-vline,
  WA_TXW_BWPOS-LIFNR, sy-vline,
  WA_TXW_BWPOS-BUKRS, sy-vline,
  WA_TXW_BWPOS-BELNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_BWPOS 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_TXW_BWPOS 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_TXW_BWPOS INTO WA_TXW_BWPOS.


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

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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field REBZJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TXW_BWPOS-REBZJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_BWPOS-REBZJ.
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_TXW_BWPOS_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
UMBWM TYPE STRING,
ZBUKR TYPE STRING,
GRUPPE TYPE STRING,
KOART TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
HKONT TYPE STRING,
BWBER TYPE STRING,
GSBER TYPE STRING,
VBUND TYPE STRING,
XBLNR TYPE STRING,
ZUONR TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
CPUDT TYPE STRING,
ZFBDT TYPE STRING,
FAEDT TYPE STRING,
BLART TYPE STRING,
BSCHL TYPE STRING,
MSCHL TYPE STRING,
MANSP TYPE STRING,
MABER TYPE STRING,
MADAT TYPE STRING,
UMSKS TYPE STRING,
UMSKZ TYPE STRING,
SHKZG TYPE STRING,
WAERS TYPE STRING,
DMSHB TYPE STRING,
WRSHB TYPE STRING,
REBZG TYPE STRING,
REBZJ TYPE STRING,
REBZZ TYPE STRING,
LAND1 TYPE STRING,
MWSKZ TYPE STRING,
DMSHB_BAS TYPE STRING,
X_BSBM TYPE STRING,
WBRSL TYPE STRING,
OVDUE TYPE STRING,
ZINSO TYPE STRING,
XMANU TYPE STRING,
XEXTR TYPE STRING,
PWBTR TYPE STRING,
BWSHB_GROS TYPE STRING,
BWSHB_OLD TYPE STRING,
BWSHB_NET TYPE STRING,
XCLEAR TYPE STRING,
FUTURE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_BWPOS_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_TXW_BWPOS_STR-MANDT sy-vline 
WA_TXW_BWPOS_STR-LAUFD sy-vline 
WA_TXW_BWPOS_STR-LAUFI sy-vline 
WA_TXW_BWPOS_STR-UMBWM sy-vline 
WA_TXW_BWPOS_STR-ZBUKR sy-vline 
WA_TXW_BWPOS_STR-GRUPPE sy-vline 
WA_TXW_BWPOS_STR-KOART sy-vline 
WA_TXW_BWPOS_STR-KUNNR sy-vline 
WA_TXW_BWPOS_STR-LIFNR sy-vline 
WA_TXW_BWPOS_STR-BUKRS sy-vline 
WA_TXW_BWPOS_STR-BELNR sy-vline 
WA_TXW_BWPOS_STR-GJAHR sy-vline 
WA_TXW_BWPOS_STR-BUZEI sy-vline 
WA_TXW_BWPOS_STR-HKONT sy-vline 
WA_TXW_BWPOS_STR-BWBER sy-vline 
WA_TXW_BWPOS_STR-GSBER sy-vline 
WA_TXW_BWPOS_STR-VBUND sy-vline 
WA_TXW_BWPOS_STR-XBLNR sy-vline 
WA_TXW_BWPOS_STR-ZUONR sy-vline 
WA_TXW_BWPOS_STR-BUDAT sy-vline 
WA_TXW_BWPOS_STR-BLDAT sy-vline 
WA_TXW_BWPOS_STR-CPUDT sy-vline 
WA_TXW_BWPOS_STR-ZFBDT sy-vline 
WA_TXW_BWPOS_STR-FAEDT sy-vline 
WA_TXW_BWPOS_STR-BLART sy-vline 
WA_TXW_BWPOS_STR-BSCHL sy-vline 
WA_TXW_BWPOS_STR-MSCHL sy-vline 
WA_TXW_BWPOS_STR-MANSP sy-vline 
WA_TXW_BWPOS_STR-MABER sy-vline 
WA_TXW_BWPOS_STR-MADAT sy-vline 
WA_TXW_BWPOS_STR-UMSKS sy-vline 
WA_TXW_BWPOS_STR-UMSKZ sy-vline 
WA_TXW_BWPOS_STR-SHKZG sy-vline 
WA_TXW_BWPOS_STR-WAERS sy-vline 
WA_TXW_BWPOS_STR-DMSHB sy-vline 
WA_TXW_BWPOS_STR-WRSHB sy-vline 
WA_TXW_BWPOS_STR-REBZG sy-vline 
WA_TXW_BWPOS_STR-REBZJ sy-vline 
WA_TXW_BWPOS_STR-REBZZ sy-vline 
WA_TXW_BWPOS_STR-LAND1 sy-vline 
WA_TXW_BWPOS_STR-MWSKZ sy-vline 
WA_TXW_BWPOS_STR-DMSHB_BAS sy-vline 
WA_TXW_BWPOS_STR-X_BSBM sy-vline 
WA_TXW_BWPOS_STR-WBRSL sy-vline 
WA_TXW_BWPOS_STR-OVDUE sy-vline 
WA_TXW_BWPOS_STR-ZINSO sy-vline 
WA_TXW_BWPOS_STR-XMANU sy-vline 
WA_TXW_BWPOS_STR-XEXTR sy-vline 
WA_TXW_BWPOS_STR-PWBTR sy-vline 
WA_TXW_BWPOS_STR-BWSHB_GROS sy-vline 
WA_TXW_BWPOS_STR-BWSHB_OLD sy-vline 
WA_TXW_BWPOS_STR-BWSHB_NET sy-vline 
WA_TXW_BWPOS_STR-XCLEAR sy-vline 
WA_TXW_BWPOS_STR-FUTURE sy-vline      INTO ld_text SEPARATED BY SPACE.

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