ABAP Select data from SAP table WCOCOP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCOCOP
*  INTO TABLE @DATA(IT_WCOCOP2).
*--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_WCOCOP INDEX 1 INTO DATA(WA_WCOCOP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCOCOP>-CLIENT = 1.
<WCOCOP>-NUM = 1.
<WCOCOP>-PARTNER_GUID = 1.
<WCOCOP>-PARVW = 1.
<WCOCOP>-PARZA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCOCOP-GUID, sy-vline,
  WA_WCOCOP-ERNAM, sy-vline,
  WA_WCOCOP-ERDAT, sy-vline,
  WA_WCOCOP-LIFNR, sy-vline,
  WA_WCOCOP-KUNNR, sy-vline,
  WA_WCOCOP-DEFPA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCOCOP 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_WCOCOP 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_WCOCOP INTO WA_WCOCOP.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ADDR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCOCOP-ADDR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCOCOP-ADDR.
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_WCOCOP_STR, 
CLIENT TYPE STRING,
NUM TYPE STRING,
PARTNER_GUID TYPE STRING,
PARVW TYPE STRING,
PARZA TYPE STRING,
GUID TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
DEFPA TYPE STRING,
PARNR TYPE STRING,
PERNR TYPE STRING,
ADRNR TYPE STRING,
ADRDA TYPE STRING,
HISTUNR TYPE STRING,
ADDR TYPE STRING,
ITEM_GUID TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCOCOP_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_WCOCOP_STR-CLIENT sy-vline 
WA_WCOCOP_STR-NUM sy-vline 
WA_WCOCOP_STR-PARTNER_GUID sy-vline 
WA_WCOCOP_STR-PARVW sy-vline 
WA_WCOCOP_STR-PARZA sy-vline 
WA_WCOCOP_STR-GUID sy-vline 
WA_WCOCOP_STR-ERNAM sy-vline 
WA_WCOCOP_STR-ERDAT sy-vline 
WA_WCOCOP_STR-LIFNR sy-vline 
WA_WCOCOP_STR-KUNNR sy-vline 
WA_WCOCOP_STR-DEFPA sy-vline 
WA_WCOCOP_STR-PARNR sy-vline 
WA_WCOCOP_STR-PERNR sy-vline 
WA_WCOCOP_STR-ADRNR sy-vline 
WA_WCOCOP_STR-ADRDA sy-vline 
WA_WCOCOP_STR-HISTUNR sy-vline 
WA_WCOCOP_STR-ADDR sy-vline 
WA_WCOCOP_STR-ITEM_GUID sy-vline 
WA_WCOCOP_STR-_DATAAGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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