ABAP Select data from SAP table OPR_WC_REF_CLS_DATA_INTERFACE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OPR_WC_REF_CLS_DATA_INTERFACE
*  INTO TABLE @DATA(IT_OPR_WC_REF_CLS_DATA_INTERFACE2).
*--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_OPR_WC_REF_CLS_DATA_INTERFACE INDEX 1 INTO DATA(WA_OPR_WC_REF_CLS_DATA_INTERFACE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OPR_WC_REF_CLS_DATA_INTERFACE>-PLNTY = 1.
<OPR_WC_REF_CLS_DATA_INTERFACE>-PLNNR = 1.
<OPR_WC_REF_CLS_DATA_INTERFACE>-PLNAL = 1.
<OPR_WC_REF_CLS_DATA_INTERFACE>-PLNFL = 1.
<OPR_WC_REF_CLS_DATA_INTERFACE>-AENNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OPR_WC_REF_CLS_DATA_INTERFACE-DATUV, sy-vline,
  WA_OPR_WC_REF_CLS_DATA_INTERFACE-AENNR_AUS, sy-vline,
  WA_OPR_WC_REF_CLS_DATA_INTERFACE-DATUB, sy-vline,
  WA_OPR_WC_REF_CLS_DATA_INTERFACE-LOEKZ, sy-vline,
  WA_OPR_WC_REF_CLS_DATA_INTERFACE-OPRID, sy-vline,
  WA_OPR_WC_REF_CLS_DATA_INTERFACE-VORNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OPR_WC_REF_CLS_DATA_INTERFACE 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_OPR_WC_REF_CLS_DATA_INTERFACE 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_OPR_WC_REF_CLS_DATA_INTERFACE INTO WA_OPR_WC_REF_CLS_DATA_INTERFACE.


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

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

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

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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_OPR_WC_REF_CLS_DATA_INTERFACE-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OPR_WC_REF_CLS_DATA_INTERFACE-VORNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field VPLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OPR_WC_REF_CLS_DATA_INTERFACE-VPLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OPR_WC_REF_CLS_DATA_INTERFACE-VPLAL.
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_OPR_WC_REF_CLS_DATA_INTERFACE_STR, 
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
AENNR TYPE STRING,
DATUV TYPE STRING,
AENNR_AUS TYPE STRING,
DATUB TYPE STRING,
LOEKZ TYPE STRING,
OPRID TYPE STRING,
VORNR TYPE STRING,
VPLNR TYPE STRING,
VPLAL TYPE STRING,
VINTV TYPE STRING,
ARBPL TYPE STRING,
WERKS TYPE STRING,
STEUS TYPE STRING,
VERDART TYPE STRING,
KTSCH TYPE STRING,
LTXA1 TYPE STRING,
FLG_TSK_GROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OPR_WC_REF_CLS_DATA_INTERFACE_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_OPR_WC_REF_CLS_DATA_INTERFACE_STR-PLNTY sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-PLNNR sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-PLNAL sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-PLNFL sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-AENNR sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-DATUV sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-AENNR_AUS sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-DATUB sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-LOEKZ sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-OPRID sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-VORNR sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-VPLNR sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-VPLAL sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-VINTV sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-ARBPL sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-WERKS sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-STEUS sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-VERDART sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-KTSCH sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-LTXA1 sy-vline 
WA_OPR_WC_REF_CLS_DATA_INTERFACE_STR-FLG_TSK_GROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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