ABAP Select data from SAP table CRETSREFDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRETSREFDOC
*  INTO TABLE @DATA(IT_CRETSREFDOC2).
*--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_CRETSREFDOC INDEX 1 INTO DATA(WA_CRETSREFDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRETSREFDOC>-MANDT = 1.
<CRETSREFDOC>-RETURNSREFERENCEDOCUMENT = 1.
<CRETSREFDOC>-SDDOCUMENTCATEGORY = 1.
<CRETSREFDOC>-DOCUMENTTYPE = 1.
<CRETSREFDOC>-DOCUMENTTYPENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRETSREFDOC-PURCHASEORDERBYCUSTOMER, sy-vline,
  WA_CRETSREFDOC-SOLDTOPARTY, sy-vline,
  WA_CRETSREFDOC-SOLDTOPARTYNAME, sy-vline,
  WA_CRETSREFDOC-SHIPTOPARTY, sy-vline,
  WA_CRETSREFDOC-SHIPTOPARTYNAME, sy-vline,
  WA_CRETSREFDOC-DOCUMENTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRETSREFDOC 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_CRETSREFDOC 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_CRETSREFDOC INTO WA_CRETSREFDOC.


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

*Conversion exit AUART, internal->external for field DOCUMENTTYPE
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_CRETSREFDOC-DOCUMENTTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRETSREFDOC-DOCUMENTTYPE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SHIPTOPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRETSREFDOC-SHIPTOPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRETSREFDOC-SHIPTOPARTY.
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_CRETSREFDOC_STR, 
MANDT TYPE STRING,
RETURNSREFERENCEDOCUMENT TYPE STRING,
SDDOCUMENTCATEGORY TYPE STRING,
DOCUMENTTYPE TYPE STRING,
DOCUMENTTYPENAME TYPE STRING,
PURCHASEORDERBYCUSTOMER TYPE STRING,
SOLDTOPARTY TYPE STRING,
SOLDTOPARTYNAME TYPE STRING,
SHIPTOPARTY TYPE STRING,
SHIPTOPARTYNAME TYPE STRING,
DOCUMENTDATE TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CREATEDBYUSER TYPE STRING,
RESPONSIBLEEMPLOYEE TYPE STRING,
SALESORGANIZATION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
ORGANIZATIONDIVISION TYPE STRING,
SALESGROUP TYPE STRING,
SALESOFFICE TYPE STRING,
PRICINGDATE TYPE STRING,
OVERALLSDPROCESSSTATUS TYPE STRING,
OVERALLSDPROCESSSTATUSDESC TYPE STRING,
CREATEACTIONISENABLED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRETSREFDOC_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_CRETSREFDOC_STR-MANDT sy-vline 
WA_CRETSREFDOC_STR-RETURNSREFERENCEDOCUMENT sy-vline 
WA_CRETSREFDOC_STR-SDDOCUMENTCATEGORY sy-vline 
WA_CRETSREFDOC_STR-DOCUMENTTYPE sy-vline 
WA_CRETSREFDOC_STR-DOCUMENTTYPENAME sy-vline 
WA_CRETSREFDOC_STR-PURCHASEORDERBYCUSTOMER sy-vline 
WA_CRETSREFDOC_STR-SOLDTOPARTY sy-vline 
WA_CRETSREFDOC_STR-SOLDTOPARTYNAME sy-vline 
WA_CRETSREFDOC_STR-SHIPTOPARTY sy-vline 
WA_CRETSREFDOC_STR-SHIPTOPARTYNAME sy-vline 
WA_CRETSREFDOC_STR-DOCUMENTDATE sy-vline 
WA_CRETSREFDOC_STR-TOTALNETAMOUNT sy-vline 
WA_CRETSREFDOC_STR-TRANSACTIONCURRENCY sy-vline 
WA_CRETSREFDOC_STR-CREATEDBYUSER sy-vline 
WA_CRETSREFDOC_STR-RESPONSIBLEEMPLOYEE sy-vline 
WA_CRETSREFDOC_STR-SALESORGANIZATION sy-vline 
WA_CRETSREFDOC_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_CRETSREFDOC_STR-ORGANIZATIONDIVISION sy-vline 
WA_CRETSREFDOC_STR-SALESGROUP sy-vline 
WA_CRETSREFDOC_STR-SALESOFFICE sy-vline 
WA_CRETSREFDOC_STR-PRICINGDATE sy-vline 
WA_CRETSREFDOC_STR-OVERALLSDPROCESSSTATUS sy-vline 
WA_CRETSREFDOC_STR-OVERALLSDPROCESSSTATUSDESC sy-vline 
WA_CRETSREFDOC_STR-CREATEACTIONISENABLED sy-vline      INTO ld_text SEPARATED BY SPACE.

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