ABAP Select data from SAP table WOD20001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WOD20001 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 WOD20001. 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 WOD20001 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_WOD20001 TYPE STANDARD TABLE OF WOD20001,
      WA_WOD20001 TYPE WOD20001,
      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: <WOD20001> TYPE WOD20001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WOD20001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WOD20001
  INTO TABLE IT_WOD20001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WOD20001
*  INTO TABLE @DATA(IT_WOD200012).
*--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_WOD20001 INDEX 1 INTO DATA(WA_WOD200012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WOD20001 ASSIGNING <WOD20001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WOD20001>-WOD2SHOW = 1.
<WOD20001>-WOD2TOGE = 1.
<WOD20001>-WOD2ZWBI = 1.
<WOD20001>-WOD2SOR1 = 1.
<WOD20001>-WOD2ORDER = 1.

ENDLOOP.

LOOP AT IT_WOD20001 INTO WA_WOD20001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WOD20001-WOD2HEAD, sy-vline,
  WA_WOD20001-WOD2HORIZONT, sy-vline,
  WA_WOD20001-WOD2LTSSPLITT, sy-vline,
  WA_WOD20001-WOD2SHOWP, sy-vline,
  WA_WOD20001-WOD2SOR2, sy-vline,
  WA_WOD20001-WOD2UPBRW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WOD20001 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_WOD20001 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_WOD20001 INTO WA_WOD20001.


*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_WOD20001_STR, 
WOD2SHOW TYPE STRING,
WOD2TOGE TYPE STRING,
WOD2ZWBI TYPE STRING,
WOD2SOR1 TYPE STRING,
WOD2ORDER TYPE STRING,
WOD2HEAD TYPE STRING,
WOD2HORIZONT TYPE STRING,
WOD2LTSSPLITT TYPE STRING,
WOD2SHOWP TYPE STRING,
WOD2SOR2 TYPE STRING,
WOD2UPBRW TYPE STRING,
WOD2KZKONNR TYPE STRING,
WOD2KZRELIF TYPE STRING,
WOD2KZFOREKGRP TYPE STRING,
WOD2CAPA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WOD20001_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_WOD20001_STR-WOD2SHOW sy-vline 
WA_WOD20001_STR-WOD2TOGE sy-vline 
WA_WOD20001_STR-WOD2ZWBI sy-vline 
WA_WOD20001_STR-WOD2SOR1 sy-vline 
WA_WOD20001_STR-WOD2ORDER sy-vline 
WA_WOD20001_STR-WOD2HEAD sy-vline 
WA_WOD20001_STR-WOD2HORIZONT sy-vline 
WA_WOD20001_STR-WOD2LTSSPLITT sy-vline 
WA_WOD20001_STR-WOD2SHOWP sy-vline 
WA_WOD20001_STR-WOD2SOR2 sy-vline 
WA_WOD20001_STR-WOD2UPBRW sy-vline 
WA_WOD20001_STR-WOD2KZKONNR sy-vline 
WA_WOD20001_STR-WOD2KZRELIF sy-vline 
WA_WOD20001_STR-WOD2KZFOREKGRP sy-vline 
WA_WOD20001_STR-WOD2CAPA sy-vline      INTO ld_text SEPARATED BY SPACE.

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