ABAP Select data from SAP table TXW_BELEG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_BELEG 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_BELEG. 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_BELEG 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_BELEG TYPE STANDARD TABLE OF TXW_BELEG,
      WA_TXW_BELEG TYPE TXW_BELEG,
      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_BELEG> TYPE TXW_BELEG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_BELEG
*  INTO TABLE @DATA(IT_TXW_BELEG2).
*--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_BELEG INDEX 1 INTO DATA(WA_TXW_BELEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_BELEG>-MANDT = 1.
<TXW_BELEG>-PERNR = 1.
<TXW_BELEG>-REINR = 1.
<TXW_BELEG>-PERIO = 1.
<TXW_BELEG>-PDVRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_BELEG-BELNR, sy-vline,
  WA_TXW_BELEG-SPKZL, sy-vline,
  WA_TXW_BELEG-BEART, sy-vline,
  WA_TXW_BELEG-MWSKZ, sy-vline,
  WA_TXW_BELEG-BETRG, sy-vline,
  WA_TXW_BELEG-BLDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_BELEG 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_BELEG 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_BELEG INTO WA_TXW_BELEG.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TXW_BELEG_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
REINR TYPE STRING,
PERIO TYPE STRING,
PDVRS TYPE STRING,
BELNR TYPE STRING,
SPKZL TYPE STRING,
BEART TYPE STRING,
MWSKZ TYPE STRING,
BETRG TYPE STRING,
BLDAT TYPE STRING,
BTEXT TYPE STRING,
WAERS TYPE STRING,
KURSB TYPE STRING,
FFACT TYPE STRING,
TFACT TYPE STRING,
ANZFR TYPE STRING,
LNDFR TYPE STRING,
BERFR TYPE STRING,
RGION TYPE STRING,
TXJCD TYPE STRING,
PAYOT TYPE STRING,
PAYCURR TYPE STRING,
ABOVE_LIMIT TYPE STRING,
PROTECT TYPE STRING,
REFNR TYPE STRING,
PAPER_RECEIPT TYPE STRING,
RECEIPT_VALIDATED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_BELEG_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_BELEG_STR-MANDT sy-vline 
WA_TXW_BELEG_STR-PERNR sy-vline 
WA_TXW_BELEG_STR-REINR sy-vline 
WA_TXW_BELEG_STR-PERIO sy-vline 
WA_TXW_BELEG_STR-PDVRS sy-vline 
WA_TXW_BELEG_STR-BELNR sy-vline 
WA_TXW_BELEG_STR-SPKZL sy-vline 
WA_TXW_BELEG_STR-BEART sy-vline 
WA_TXW_BELEG_STR-MWSKZ sy-vline 
WA_TXW_BELEG_STR-BETRG sy-vline 
WA_TXW_BELEG_STR-BLDAT sy-vline 
WA_TXW_BELEG_STR-BTEXT sy-vline 
WA_TXW_BELEG_STR-WAERS sy-vline 
WA_TXW_BELEG_STR-KURSB sy-vline 
WA_TXW_BELEG_STR-FFACT sy-vline 
WA_TXW_BELEG_STR-TFACT sy-vline 
WA_TXW_BELEG_STR-ANZFR sy-vline 
WA_TXW_BELEG_STR-LNDFR sy-vline 
WA_TXW_BELEG_STR-BERFR sy-vline 
WA_TXW_BELEG_STR-RGION sy-vline 
WA_TXW_BELEG_STR-TXJCD sy-vline 
WA_TXW_BELEG_STR-PAYOT sy-vline 
WA_TXW_BELEG_STR-PAYCURR sy-vline 
WA_TXW_BELEG_STR-ABOVE_LIMIT sy-vline 
WA_TXW_BELEG_STR-PROTECT sy-vline 
WA_TXW_BELEG_STR-REFNR sy-vline 
WA_TXW_BELEG_STR-PAPER_RECEIPT sy-vline 
WA_TXW_BELEG_STR-RECEIPT_VALIDATED sy-vline      INTO ld_text SEPARATED BY SPACE.

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