ABAP Select data from SAP table TXW_DL_HD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_DL_HD 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_DL_HD. 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_DL_HD 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_DL_HD TYPE STANDARD TABLE OF TXW_DL_HD,
      WA_TXW_DL_HD TYPE TXW_DL_HD,
      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_DL_HD> TYPE TXW_DL_HD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_DL_HD
*  INTO TABLE @DATA(IT_TXW_DL_HD2).
*--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_DL_HD INDEX 1 INTO DATA(WA_TXW_DL_HD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_DL_HD>-MANDT = 1.
<TXW_DL_HD>-VBELN = 1.
<TXW_DL_HD>-LFDAT = 1.
<TXW_DL_HD>-VBTYP = 1.
<TXW_DL_HD>-WADAT_IST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_DL_HD-BOLNR, sy-vline,
  WA_TXW_DL_HD-KUNNR, sy-vline,
  WA_TXW_DL_HD-KUNAG, sy-vline,
  WA_TXW_DL_HD-WAERK, sy-vline,
  WA_TXW_DL_HD-VSTEL, sy-vline,
  WA_TXW_DL_HD-KALSM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_DL_HD 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_DL_HD 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_DL_HD INTO WA_TXW_DL_HD.


*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_DL_HD-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_DL_HD-VBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_DL_HD-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_DL_HD-KUNAG.
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_DL_HD_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
LFDAT TYPE STRING,
VBTYP TYPE STRING,
WADAT_IST TYPE STRING,
BOLNR TYPE STRING,
KUNNR TYPE STRING,
KUNAG TYPE STRING,
WAERK TYPE STRING,
VSTEL TYPE STRING,
KALSM TYPE STRING,
BUKRS TYPE STRING,
VKORG TYPE STRING,
EXNUM TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_DL_HD_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_DL_HD_STR-MANDT sy-vline 
WA_TXW_DL_HD_STR-VBELN sy-vline 
WA_TXW_DL_HD_STR-LFDAT sy-vline 
WA_TXW_DL_HD_STR-VBTYP sy-vline 
WA_TXW_DL_HD_STR-WADAT_IST sy-vline 
WA_TXW_DL_HD_STR-BOLNR sy-vline 
WA_TXW_DL_HD_STR-KUNNR sy-vline 
WA_TXW_DL_HD_STR-KUNAG sy-vline 
WA_TXW_DL_HD_STR-WAERK sy-vline 
WA_TXW_DL_HD_STR-VSTEL sy-vline 
WA_TXW_DL_HD_STR-KALSM sy-vline 
WA_TXW_DL_HD_STR-BUKRS sy-vline 
WA_TXW_DL_HD_STR-VKORG sy-vline 
WA_TXW_DL_HD_STR-EXNUM sy-vline 
WA_TXW_DL_HD_STR-ERDAT sy-vline 
WA_TXW_DL_HD_STR-ERNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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