ABAP Select data from SAP table DFKKCRH_GFN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKCRH_GFN
*  INTO TABLE @DATA(IT_DFKKCRH_GFN2).
*--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_DFKKCRH_GFN INDEX 1 INTO DATA(WA_DFKKCRH_GFN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKCRH_GFN>-BUSINESSPARTNER = 1.
<DFKKCRH_GFN>-CALENDARYEAR = 1.
<DFKKCRH_GFN>-CACREDITWORTHINESSJANUARYVALUE = 1.
<DFKKCRH_GFN>-CACREDITWORTHINESSFEBRUARYVAL = 1.
<DFKKCRH_GFN>-CACREDITWORTHINESSMARCHVALUE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKCRH_GFN-CACREDITWORTHINESSAPRILVALUE, sy-vline,
  WA_DFKKCRH_GFN-CACREDITWORTHINESSMAYVALUE, sy-vline,
  WA_DFKKCRH_GFN-CACREDITWORTHINESSJUNEVALUE, sy-vline,
  WA_DFKKCRH_GFN-CACREDITWORTHINESSJULYVALUE, sy-vline,
  WA_DFKKCRH_GFN-CACREDITWORTHINESSAUGUSTVALUE, sy-vline,
  WA_DFKKCRH_GFN-CACREDITWORTHINESSSEPTEMBERVAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKCRH_GFN 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_DFKKCRH_GFN 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_DFKKCRH_GFN INTO WA_DFKKCRH_GFN.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DFKKCRH_GFN_STR, 
BUSINESSPARTNER TYPE STRING,
CALENDARYEAR TYPE STRING,
CACREDITWORTHINESSJANUARYVALUE TYPE STRING,
CACREDITWORTHINESSFEBRUARYVAL TYPE STRING,
CACREDITWORTHINESSMARCHVALUE TYPE STRING,
CACREDITWORTHINESSAPRILVALUE TYPE STRING,
CACREDITWORTHINESSMAYVALUE TYPE STRING,
CACREDITWORTHINESSJUNEVALUE TYPE STRING,
CACREDITWORTHINESSJULYVALUE TYPE STRING,
CACREDITWORTHINESSAUGUSTVALUE TYPE STRING,
CACREDITWORTHINESSSEPTEMBERVAL TYPE STRING,
CACREDITWORTHINESSOCTOBERVALUE TYPE STRING,
CACREDITWORTHINESSNOVEMBERVAL TYPE STRING,
CACREDITWORTHINESSDECEMBERVAL TYPE STRING,
CAMANUALCREDITWORTHINESSVALUE TYPE STRING,
CACREDITWORTHINESSFACTORINPCT TYPE STRING,
CAMANUALCREDITWORTHINESSDATE TYPE STRING,
CANUMBEROFCREDITWORTHINESSITMS TYPE STRING,
CAFROZENCREDITWORTHINESSDATE TYPE STRING,
CAUNFROZENCREDITWORTHINESSDATE TYPE STRING,
CAEXTERNALCREDITWORTHINESSVAL TYPE STRING,
CAEXTERNALCREDITWORTHINESSDATE TYPE STRING,
CACRDTWRTHNSSHASTOBEREPLICATED TYPE STRING,
CACREDITWRTHNSSREPLICATIONDATE TYPE STRING,
CAFROZENCREDITWORTHINESSVALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKCRH_GFN_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_DFKKCRH_GFN_STR-BUSINESSPARTNER sy-vline 
WA_DFKKCRH_GFN_STR-CALENDARYEAR sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSJANUARYVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSFEBRUARYVAL sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSMARCHVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSAPRILVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSMAYVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSJUNEVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSJULYVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSAUGUSTVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSSEPTEMBERVAL sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSOCTOBERVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSNOVEMBERVAL sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSDECEMBERVAL sy-vline 
WA_DFKKCRH_GFN_STR-CAMANUALCREDITWORTHINESSVALUE sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWORTHINESSFACTORINPCT sy-vline 
WA_DFKKCRH_GFN_STR-CAMANUALCREDITWORTHINESSDATE sy-vline 
WA_DFKKCRH_GFN_STR-CANUMBEROFCREDITWORTHINESSITMS sy-vline 
WA_DFKKCRH_GFN_STR-CAFROZENCREDITWORTHINESSDATE sy-vline 
WA_DFKKCRH_GFN_STR-CAUNFROZENCREDITWORTHINESSDATE sy-vline 
WA_DFKKCRH_GFN_STR-CAEXTERNALCREDITWORTHINESSVAL sy-vline 
WA_DFKKCRH_GFN_STR-CAEXTERNALCREDITWORTHINESSDATE sy-vline 
WA_DFKKCRH_GFN_STR-CACRDTWRTHNSSHASTOBEREPLICATED sy-vline 
WA_DFKKCRH_GFN_STR-CACREDITWRTHNSSREPLICATIONDATE sy-vline 
WA_DFKKCRH_GFN_STR-CAFROZENCREDITWORTHINESSVALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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