ABAP Select data from SAP table WCSOBJLST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCSOBJLST
*  INTO TABLE @DATA(IT_WCSOBJLST2).
*--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_WCSOBJLST INDEX 1 INTO DATA(WA_WCSOBJLST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCSOBJLST>-BUTTON = 1.
<WCSOBJLST>-SFIELD = 1.
<WCSOBJLST>-TPLNR = 1.
<WCSOBJLST>-EQUNR = 1.
<WCSOBJLST>-STXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCSOBJLST-SRAUM, sy-vline,
  WA_WCSOBJLST-SWERK, sy-vline,
  WA_WCSOBJLST-STORT, sy-vline,
  WA_WCSOBJLST-BEBER, sy-vline,
  WA_WCSOBJLST-SWERKTXT, sy-vline,
  WA_WCSOBJLST-STORTTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCSOBJLST 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_WCSOBJLST 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_WCSOBJLST INTO WA_WCSOBJLST.


*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 TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_WCSOBJLST-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSOBJLST-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSOBJLST-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSOBJLST-EQUNR.
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_WCSOBJLST_STR, 
BUTTON TYPE STRING,
SFIELD TYPE STRING,
TPLNR TYPE STRING,
EQUNR TYPE STRING,
STXT TYPE STRING,
SRAUM TYPE STRING,
SWERK TYPE STRING,
STORT TYPE STRING,
BEBER TYPE STRING,
SWERKTXT TYPE STRING,
STORTTXT TYPE STRING,
FINGTXT TYPE STRING,
TELETXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCSOBJLST_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_WCSOBJLST_STR-BUTTON sy-vline 
WA_WCSOBJLST_STR-SFIELD sy-vline 
WA_WCSOBJLST_STR-TPLNR sy-vline 
WA_WCSOBJLST_STR-EQUNR sy-vline 
WA_WCSOBJLST_STR-STXT sy-vline 
WA_WCSOBJLST_STR-SRAUM sy-vline 
WA_WCSOBJLST_STR-SWERK sy-vline 
WA_WCSOBJLST_STR-STORT sy-vline 
WA_WCSOBJLST_STR-BEBER sy-vline 
WA_WCSOBJLST_STR-SWERKTXT sy-vline 
WA_WCSOBJLST_STR-STORTTXT sy-vline 
WA_WCSOBJLST_STR-FINGTXT sy-vline 
WA_WCSOBJLST_STR-TELETXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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