ABAP Select data from SAP table CDOCLGRREF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDOCLGRREF
*  INTO TABLE @DATA(IT_CDOCLGRREF2).
*--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_CDOCLGRREF INDEX 1 INTO DATA(WA_CDOCLGRREF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDOCLGRREF>-MANDT = 1.
<CDOCLGRREF>-INVOICEREFERENCE = 1.
<CDOCLGRREF>-INVOICEREFERENCEFISCALYEAR = 1.
<CDOCLGRREF>-MATERIALDOCUMENTITEM = 1.
<CDOCLGRREF>-PURCHASEORDER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDOCLGRREF-PURCHASEORDERITEM, sy-vline,
  WA_CDOCLGRREF-REFERENCEDOCUMENT, sy-vline,
  WA_CDOCLGRREF-REFERENCEDOCUMENTFISCALYEAR, sy-vline,
  WA_CDOCLGRREF-REFERENCEDOCUMENTITEM, sy-vline,
  WA_CDOCLGRREF-ACCOUNTINGDOCUMENTITEM1, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CDOCLGRREF 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_CDOCLGRREF 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_CDOCLGRREF INTO WA_CDOCLGRREF.


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

*Conversion exit GJAHR, internal->external for field INVOICEREFERENCEFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CDOCLGRREF-INVOICEREFERENCEFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDOCLGRREF-INVOICEREFERENCEFISCALYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field REFERENCEDOCUMENTFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CDOCLGRREF-REFERENCEDOCUMENTFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDOCLGRREF-REFERENCEDOCUMENTFISCALYEAR.
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_CDOCLGRREF_STR, 
MANDT TYPE STRING,
INVOICEREFERENCE TYPE STRING,
INVOICEREFERENCEFISCALYEAR TYPE STRING,
MATERIALDOCUMENTITEM TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
REFERENCEDOCUMENT TYPE STRING,
REFERENCEDOCUMENTFISCALYEAR TYPE STRING,
REFERENCEDOCUMENTITEM TYPE STRING,
ACCOUNTINGDOCUMENTITEM1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDOCLGRREF_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_CDOCLGRREF_STR-MANDT sy-vline 
WA_CDOCLGRREF_STR-INVOICEREFERENCE sy-vline 
WA_CDOCLGRREF_STR-INVOICEREFERENCEFISCALYEAR sy-vline 
WA_CDOCLGRREF_STR-MATERIALDOCUMENTITEM sy-vline 
WA_CDOCLGRREF_STR-PURCHASEORDER sy-vline 
WA_CDOCLGRREF_STR-PURCHASEORDERITEM sy-vline 
WA_CDOCLGRREF_STR-REFERENCEDOCUMENT sy-vline 
WA_CDOCLGRREF_STR-REFERENCEDOCUMENTFISCALYEAR sy-vline 
WA_CDOCLGRREF_STR-REFERENCEDOCUMENTITEM sy-vline 
WA_CDOCLGRREF_STR-ACCOUNTINGDOCUMENTITEM1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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