ABAP Select data from SAP table TDWZKSJ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDWZKSJ 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 TDWZKSJ. 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 TDWZKSJ 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_TDWZKSJ TYPE STANDARD TABLE OF TDWZKSJ,
      WA_TDWZKSJ TYPE TDWZKSJ,
      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: <TDWZKSJ> TYPE TDWZKSJ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDWZKSJ
*  INTO TABLE @DATA(IT_TDWZKSJ2).
*--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_TDWZKSJ INDEX 1 INTO DATA(WA_TDWZKSJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDWZKSJ>-DWZ_SART = 1.
<TDWZKSJ>-KURS_KZ = 1.
<TDWZKSJ>-FILLER1 = 1.
<TDWZKSJ>-WP_KENN = 1.
<TDWZKSJ>-FILLER2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDWZKSJ-KURS, sy-vline,
  WA_TDWZKSJ-FILLER3, sy-vline,
  WA_TDWZKSJ-FILLER4, sy-vline,
  WA_TDWZKSJ-FILLER5, sy-vline,
  WA_TDWZKSJ-FILLER6, sy-vline,
  WA_TDWZKSJ-FILLER7, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDWZKSJ 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_TDWZKSJ 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_TDWZKSJ INTO WA_TDWZKSJ.


*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_TDWZKSJ_STR, 
DWZ_SART TYPE STRING,
KURS_KZ TYPE STRING,
FILLER1 TYPE STRING,
WP_KENN TYPE STRING,
FILLER2 TYPE STRING,
KURS TYPE STRING,
FILLER3 TYPE STRING,
FILLER4 TYPE STRING,
FILLER5 TYPE STRING,
FILLER6 TYPE STRING,
FILLER7 TYPE STRING,
WAER TYPE STRING,
LAND TYPE STRING,
BOERSE TYPE STRING,
K_ZUSATZ TYPE STRING,
NOTART TYPE STRING,
MARKT TYPE STRING,
PRUF TYPE STRING,
DIV_MERK TYPE STRING,
FILLER8 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDWZKSJ_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_TDWZKSJ_STR-DWZ_SART sy-vline 
WA_TDWZKSJ_STR-KURS_KZ sy-vline 
WA_TDWZKSJ_STR-FILLER1 sy-vline 
WA_TDWZKSJ_STR-WP_KENN sy-vline 
WA_TDWZKSJ_STR-FILLER2 sy-vline 
WA_TDWZKSJ_STR-KURS sy-vline 
WA_TDWZKSJ_STR-FILLER3 sy-vline 
WA_TDWZKSJ_STR-FILLER4 sy-vline 
WA_TDWZKSJ_STR-FILLER5 sy-vline 
WA_TDWZKSJ_STR-FILLER6 sy-vline 
WA_TDWZKSJ_STR-FILLER7 sy-vline 
WA_TDWZKSJ_STR-WAER sy-vline 
WA_TDWZKSJ_STR-LAND sy-vline 
WA_TDWZKSJ_STR-BOERSE sy-vline 
WA_TDWZKSJ_STR-K_ZUSATZ sy-vline 
WA_TDWZKSJ_STR-NOTART sy-vline 
WA_TDWZKSJ_STR-MARKT sy-vline 
WA_TDWZKSJ_STR-PRUF sy-vline 
WA_TDWZKSJ_STR-DIV_MERK sy-vline 
WA_TDWZKSJ_STR-FILLER8 sy-vline      INTO ld_text SEPARATED BY SPACE.

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