ABAP Select data from SAP table TXW_PTRV_DOC_TAX into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_PTRV_DOC_TAX 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_PTRV_DOC_TAX. 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_PTRV_DOC_TAX 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_PTRV_DOC_TAX TYPE STANDARD TABLE OF TXW_PTRV_DOC_TAX,
      WA_TXW_PTRV_DOC_TAX TYPE TXW_PTRV_DOC_TAX,
      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_PTRV_DOC_TAX> TYPE TXW_PTRV_DOC_TAX.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_PTRV_DOC_TAX
*  INTO TABLE @DATA(IT_TXW_PTRV_DOC_TAX2).
*--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_PTRV_DOC_TAX INDEX 1 INTO DATA(WA_TXW_PTRV_DOC_TAX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_PTRV_DOC_TAX>-CLIENT = 1.
<TXW_PTRV_DOC_TAX>-AWREF = 1.
<TXW_PTRV_DOC_TAX>-AWORG = 1.
<TXW_PTRV_DOC_TAX>-AWLIN = 1.
<TXW_PTRV_DOC_TAX>-KSCHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_PTRV_DOC_TAX-KTOSL, sy-vline,
  WA_TXW_PTRV_DOC_TAX-HKONT, sy-vline,
  WA_TXW_PTRV_DOC_TAX-BUKRS, sy-vline,
  WA_TXW_PTRV_DOC_TAX-SGTXT, sy-vline,
  WA_TXW_PTRV_DOC_TAX-MWSKZ, sy-vline,
  WA_TXW_PTRV_DOC_TAX-TXJCD_DEEP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_PTRV_DOC_TAX 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_PTRV_DOC_TAX 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_PTRV_DOC_TAX INTO WA_TXW_PTRV_DOC_TAX.


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

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_PTRV_DOC_TAX-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_PTRV_DOC_TAX-HKONT.
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_PTRV_DOC_TAX_STR, 
CLIENT TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWLIN TYPE STRING,
KSCHL TYPE STRING,
KTOSL TYPE STRING,
HKONT TYPE STRING,
BUKRS TYPE STRING,
SGTXT TYPE STRING,
MWSKZ TYPE STRING,
TXJCD_DEEP TYPE STRING,
TXJCD TYPE STRING,
CURTP TYPE STRING,
WAERS TYPE STRING,
WRBTR TYPE STRING,
MSATZ TYPE STRING,
FWBAS TYPE STRING,
TXDAT TYPE STRING,
KSTAT TYPE STRING,
TXJLV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_PTRV_DOC_TAX_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_PTRV_DOC_TAX_STR-CLIENT sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-AWREF sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-AWORG sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-AWLIN sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-KSCHL sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-KTOSL sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-HKONT sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-BUKRS sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-SGTXT sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-MWSKZ sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-TXJCD_DEEP sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-TXJCD sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-CURTP sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-WAERS sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-WRBTR sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-MSATZ sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-FWBAS sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-TXDAT sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-KSTAT sy-vline 
WA_TXW_PTRV_DOC_TAX_STR-TXJLV sy-vline      INTO ld_text SEPARATED BY SPACE.

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