ABAP Select data from SAP table TXW_B_PTRV_DOC_IT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_B_PTRV_DOC_IT 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_B_PTRV_DOC_IT. 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_B_PTRV_DOC_IT 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_B_PTRV_DOC_IT TYPE STANDARD TABLE OF TXW_B_PTRV_DOC_IT,
      WA_TXW_B_PTRV_DOC_IT TYPE TXW_B_PTRV_DOC_IT,
      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_B_PTRV_DOC_IT> TYPE TXW_B_PTRV_DOC_IT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_B_PTRV_DOC_IT
*  INTO TABLE @DATA(IT_TXW_B_PTRV_DOC_IT2).
*--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_B_PTRV_DOC_IT INDEX 1 INTO DATA(WA_TXW_B_PTRV_DOC_IT2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_B_PTRV_DOC_IT-KTOSL, sy-vline,
  WA_TXW_B_PTRV_DOC_IT-HKONT, sy-vline,
  WA_TXW_B_PTRV_DOC_IT-KUNNR, sy-vline,
  WA_TXW_B_PTRV_DOC_IT-LIFNR, sy-vline,
  WA_TXW_B_PTRV_DOC_IT-VBUND, sy-vline,
  WA_TXW_B_PTRV_DOC_IT-MWSKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_B_PTRV_DOC_IT 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_B_PTRV_DOC_IT 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_B_PTRV_DOC_IT INTO WA_TXW_B_PTRV_DOC_IT.


*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_B_PTRV_DOC_IT-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_B_PTRV_DOC_IT-AWREF.
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_B_PTRV_DOC_IT_STR, 
CLIENT TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWLIN TYPE STRING,
BUKRS TYPE STRING,
KTOSL TYPE STRING,
HKONT TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
VBUND TYPE STRING,
MWSKZ TYPE STRING,
TXJCD TYPE STRING,
PERNR TYPE STRING,
GSBER TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
KSTRG TYPE STRING,
POSNR TYPE STRING,
NPLNR TYPE STRING,
VORNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
FISTL TYPE STRING,
FIPOS TYPE STRING,
GEBER TYPE STRING,
EXBEL TYPE STRING,
SGTXT TYPE STRING,
KOKEY TYPE STRING,
DATV1 TYPE STRING,
DATB1 TYPE STRING,
ANTRG TYPE STRING,
ABREC TYPE STRING,
ZFBDT TYPE STRING,
ZLSCH TYPE STRING,
CURTP TYPE STRING,
WAERS TYPE STRING,
WRBTR TYPE STRING,
FWBAS TYPE STRING,
FKBER TYPE STRING,
GRANT_NBR TYPE STRING,
FIPEX TYPE STRING,
BELNR TYPE STRING,
BELDT TYPE STRING,
TRANR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_B_PTRV_DOC_IT_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_B_PTRV_DOC_IT_STR-CLIENT sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-AWREF sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-AWORG sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-AWLIN sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-BUKRS sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KTOSL sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-HKONT sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KUNNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-LIFNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-VBUND sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-MWSKZ sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-TXJCD sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-PERNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-GSBER sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KOKRS sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KOSTL sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-AUFNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KSTRG sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-POSNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-NPLNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-VORNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KDAUF sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KDPOS sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-FISTL sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-FIPOS sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-GEBER sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-EXBEL sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-SGTXT sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-KOKEY sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-DATV1 sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-DATB1 sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-ANTRG sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-ABREC sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-ZFBDT sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-ZLSCH sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-CURTP sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-WAERS sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-WRBTR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-FWBAS sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-FKBER sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-GRANT_NBR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-FIPEX sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-BELNR sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-BELDT sy-vline 
WA_TXW_B_PTRV_DOC_IT_STR-TRANR sy-vline      INTO ld_text SEPARATED BY SPACE.

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