ABAP Select data from SAP table RKCT601 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKCT601 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 RKCT601. 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 RKCT601 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_RKCT601 TYPE STANDARD TABLE OF RKCT601,
      WA_RKCT601 TYPE RKCT601,
      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: <RKCT601> TYPE RKCT601.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RKCT601.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RKCT601
  INTO TABLE IT_RKCT601.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKCT601
*  INTO TABLE @DATA(IT_RKCT6012).
*--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_RKCT601 INDEX 1 INTO DATA(WA_RKCT6012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RKCT601 ASSIGNING <RKCT601>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKCT601>-YEARB = 1.
<RKCT601>-PERDE = 1.
<RKCT601>-BUKRS1 = 1.
<RKCT601>-CNTRY = 1.
<RKCT601>-EKUNNR = 1.

ENDLOOP.

LOOP AT IT_RKCT601 INTO WA_RKCT601.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKCT601-ESPART, sy-vline,
  WA_RKCT601-MATNR, sy-vline,
  WA_RKCT601-DISTR, sy-vline,
  WA_RKCT601-VALTY, sy-vline,
  WA_RKCT601-REVEN, sy-vline,
  WA_RKCT601-QUANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKCT601 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_RKCT601 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_RKCT601 INTO WA_RKCT601.


*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_RKCT601_STR, 
YEARB TYPE STRING,
PERDE TYPE STRING,
BUKRS1 TYPE STRING,
CNTRY TYPE STRING,
EKUNNR TYPE STRING,
ESPART TYPE STRING,
MATNR TYPE STRING,
DISTR TYPE STRING,
VALTY TYPE STRING,
REVEN TYPE STRING,
QUANT TYPE STRING,
CONT1 TYPE STRING,
CONT2 TYPE STRING,
CONT3 TYPE STRING,
VARPR TYPE STRING,
VARMA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKCT601_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_RKCT601_STR-YEARB sy-vline 
WA_RKCT601_STR-PERDE sy-vline 
WA_RKCT601_STR-BUKRS1 sy-vline 
WA_RKCT601_STR-CNTRY sy-vline 
WA_RKCT601_STR-EKUNNR sy-vline 
WA_RKCT601_STR-ESPART sy-vline 
WA_RKCT601_STR-MATNR sy-vline 
WA_RKCT601_STR-DISTR sy-vline 
WA_RKCT601_STR-VALTY sy-vline 
WA_RKCT601_STR-REVEN sy-vline 
WA_RKCT601_STR-QUANT sy-vline 
WA_RKCT601_STR-CONT1 sy-vline 
WA_RKCT601_STR-CONT2 sy-vline 
WA_RKCT601_STR-CONT3 sy-vline 
WA_RKCT601_STR-VARPR sy-vline 
WA_RKCT601_STR-VARMA sy-vline      INTO ld_text SEPARATED BY SPACE.

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