ABAP Select data from SAP table TXW_VBKD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_VBKD 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_VBKD. 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_VBKD 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_VBKD TYPE STANDARD TABLE OF TXW_VBKD,
      WA_TXW_VBKD TYPE TXW_VBKD,
      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_VBKD> TYPE TXW_VBKD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_VBKD
*  INTO TABLE @DATA(IT_TXW_VBKD2).
*--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_VBKD INDEX 1 INTO DATA(WA_TXW_VBKD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_VBKD>-MANDT = 1.
<TXW_VBKD>-VBELN = 1.
<TXW_VBKD>-POSNR = 1.
<TXW_VBKD>-KONDA = 1.
<TXW_VBKD>-KDGRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_VBKD-BZIRK, sy-vline,
  WA_TXW_VBKD-PLTYP, sy-vline,
  WA_TXW_VBKD-INCO1, sy-vline,
  WA_TXW_VBKD-INCO2, sy-vline,
  WA_TXW_VBKD-PERFK, sy-vline,
  WA_TXW_VBKD-PERRL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_VBKD 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_VBKD 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_VBKD INTO WA_TXW_VBKD.


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

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

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

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

*Conversion exit ALPHA, internal->external for field POSEX_E
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_VBKD-POSEX_E
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_VBKD-POSEX_E.
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_VBKD_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
KONDA TYPE STRING,
KDGRP TYPE STRING,
BZIRK TYPE STRING,
PLTYP TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
PERFK TYPE STRING,
PERRL TYPE STRING,
KURRF TYPE STRING,
VALTG TYPE STRING,
VALDT TYPE STRING,
ZTERM TYPE STRING,
ZLSCH TYPE STRING,
KTGRD TYPE STRING,
KURSK TYPE STRING,
PRSDT TYPE STRING,
FKDAT TYPE STRING,
FBUDA TYPE STRING,
GJAHR TYPE STRING,
POPER TYPE STRING,
MSCHL TYPE STRING,
MANSP TYPE STRING,
FPLNR TYPE STRING,
WAKTION TYPE STRING,
ABSSC TYPE STRING,
LCNUM TYPE STRING,
BSTKD TYPE STRING,
BSTDK TYPE STRING,
BSARK TYPE STRING,
IHREZ TYPE STRING,
BSTKD_E TYPE STRING,
BSTDK_E TYPE STRING,
BSARK_E TYPE STRING,
IHREZ_E TYPE STRING,
POSEX_E TYPE STRING,
KURSK_DAT TYPE STRING,
KURRF_DAT TYPE STRING,
WKWAE TYPE STRING,
WKKUR TYPE STRING,
AKWAE TYPE STRING,
AKKUR TYPE STRING,
AKPRZ TYPE STRING,
BSTKD_M TYPE STRING,
DELCO TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_VBKD_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_VBKD_STR-MANDT sy-vline 
WA_TXW_VBKD_STR-VBELN sy-vline 
WA_TXW_VBKD_STR-POSNR sy-vline 
WA_TXW_VBKD_STR-KONDA sy-vline 
WA_TXW_VBKD_STR-KDGRP sy-vline 
WA_TXW_VBKD_STR-BZIRK sy-vline 
WA_TXW_VBKD_STR-PLTYP sy-vline 
WA_TXW_VBKD_STR-INCO1 sy-vline 
WA_TXW_VBKD_STR-INCO2 sy-vline 
WA_TXW_VBKD_STR-PERFK sy-vline 
WA_TXW_VBKD_STR-PERRL sy-vline 
WA_TXW_VBKD_STR-KURRF sy-vline 
WA_TXW_VBKD_STR-VALTG sy-vline 
WA_TXW_VBKD_STR-VALDT sy-vline 
WA_TXW_VBKD_STR-ZTERM sy-vline 
WA_TXW_VBKD_STR-ZLSCH sy-vline 
WA_TXW_VBKD_STR-KTGRD sy-vline 
WA_TXW_VBKD_STR-KURSK sy-vline 
WA_TXW_VBKD_STR-PRSDT sy-vline 
WA_TXW_VBKD_STR-FKDAT sy-vline 
WA_TXW_VBKD_STR-FBUDA sy-vline 
WA_TXW_VBKD_STR-GJAHR sy-vline 
WA_TXW_VBKD_STR-POPER sy-vline 
WA_TXW_VBKD_STR-MSCHL sy-vline 
WA_TXW_VBKD_STR-MANSP sy-vline 
WA_TXW_VBKD_STR-FPLNR sy-vline 
WA_TXW_VBKD_STR-WAKTION sy-vline 
WA_TXW_VBKD_STR-ABSSC sy-vline 
WA_TXW_VBKD_STR-LCNUM sy-vline 
WA_TXW_VBKD_STR-BSTKD sy-vline 
WA_TXW_VBKD_STR-BSTDK sy-vline 
WA_TXW_VBKD_STR-BSARK sy-vline 
WA_TXW_VBKD_STR-IHREZ sy-vline 
WA_TXW_VBKD_STR-BSTKD_E sy-vline 
WA_TXW_VBKD_STR-BSTDK_E sy-vline 
WA_TXW_VBKD_STR-BSARK_E sy-vline 
WA_TXW_VBKD_STR-IHREZ_E sy-vline 
WA_TXW_VBKD_STR-POSEX_E sy-vline 
WA_TXW_VBKD_STR-KURSK_DAT sy-vline 
WA_TXW_VBKD_STR-KURRF_DAT sy-vline 
WA_TXW_VBKD_STR-WKWAE sy-vline 
WA_TXW_VBKD_STR-WKKUR sy-vline 
WA_TXW_VBKD_STR-AKWAE sy-vline 
WA_TXW_VBKD_STR-AKKUR sy-vline 
WA_TXW_VBKD_STR-AKPRZ sy-vline 
WA_TXW_VBKD_STR-BSTKD_M sy-vline 
WA_TXW_VBKD_STR-DELCO sy-vline 
WA_TXW_VBKD_STR-ERNAM sy-vline 
WA_TXW_VBKD_STR-ERDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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