ABAP Select data from SAP table WCOL_S into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCOL_S
*  INTO TABLE @DATA(IT_WCOL_S2).
*--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_WCOL_S INDEX 1 INTO DATA(WA_WCOL_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCOL_S>-MODOP = 1.
<WCOL_S>-XFELD = 1.
<WCOL_S>-LIFNR = 1.
<WCOL_S>-NAME1 = 1.
<WCOL_S>-ATINN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCOL_S-ATFOR, sy-vline,
  WA_WCOL_S-ATNAM, sy-vline,
  WA_WCOL_S-ATBEZ, sy-vline,
  WA_WCOL_S-VORLI, sy-vline,
  WA_WCOL_S-VORNA, sy-vline,
  WA_WCOL_S-SEITE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCOL_S 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_WCOL_S 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_WCOL_S INTO WA_WCOL_S.


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

*Conversion exit ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_WCOL_S-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCOL_S-ATINN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VORLI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCOL_S-VORLI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCOL_S-VORLI.
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_WCOL_S_STR, 
MODOP TYPE STRING,
XFELD TYPE STRING,
LIFNR TYPE STRING,
NAME1 TYPE STRING,
ATINN TYPE STRING,
ATFOR TYPE STRING,
ATNAM TYPE STRING,
ATBEZ TYPE STRING,
VORLI TYPE STRING,
VORNA TYPE STRING,
SEITE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCOL_S_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_WCOL_S_STR-MODOP sy-vline 
WA_WCOL_S_STR-XFELD sy-vline 
WA_WCOL_S_STR-LIFNR sy-vline 
WA_WCOL_S_STR-NAME1 sy-vline 
WA_WCOL_S_STR-ATINN sy-vline 
WA_WCOL_S_STR-ATFOR sy-vline 
WA_WCOL_S_STR-ATNAM sy-vline 
WA_WCOL_S_STR-ATBEZ sy-vline 
WA_WCOL_S_STR-VORLI sy-vline 
WA_WCOL_S_STR-VORNA sy-vline 
WA_WCOL_S_STR-SEITE sy-vline      INTO ld_text SEPARATED BY SPACE.

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