ABAP Select data from SAP table /KYK/ISS_RKATARIF_N into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /KYK/ISS_RKATARIF_N 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 /KYK/ISS_RKATARIF_N. 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 /KYK/ISS_RKATARIF_N 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_/KYK/ISS_RKATARIF_N TYPE STANDARD TABLE OF /KYK/ISS_RKATARIF_N,
      WA_/KYK/ISS_RKATARIF_N TYPE /KYK/ISS_RKATARIF_N,
      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: </KYK/ISS_RKATARIF_N> TYPE /KYK/ISS_RKATARIF_N.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /KYK/ISS_RKATARIF_N
  INTO TABLE IT_/KYK/ISS_RKATARIF_N.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KYK/ISS_RKATARIF_N
*  INTO TABLE @DATA(IT_/KYK/ISS_RKATARIF_N2).
*--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_/KYK/ISS_RKATARIF_N INDEX 1 INTO DATA(WA_/KYK/ISS_RKATARIF_N2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/KYK/ISS_RKATARIF_N ASSIGNING </KYK/ISS_RKATARIF_N>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KYK/ISS_RKATARIF_N>-MEINH = 1.
</KYK/ISS_RKATARIF_N>-KOSTL = 1.
</KYK/ISS_RKATARIF_N>-LSTAR = 1.
</KYK/ISS_RKATARIF_N>-KSKTXT = 1.
</KYK/ISS_RKATARIF_N>-LAKTXT = 1.

ENDLOOP.

LOOP AT IT_/KYK/ISS_RKATARIF_N INTO WA_/KYK/ISS_RKATARIF_N.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KYK/ISS_RKATARIF_N-KWAER, sy-vline,
  WA_/KYK/ISS_RKATARIF_N-TKGMEAN, sy-vline,
  WA_/KYK/ISS_RKATARIF_N-TKVMEAN, sy-vline,
  WA_/KYK/ISS_RKATARIF_N-TKFMEAN, sy-vline,
  WA_/KYK/ISS_RKATARIF_N-TARKZ, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_/KYK/ISS_RKATARIF_N 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_/KYK/ISS_RKATARIF_N 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_/KYK/ISS_RKATARIF_N INTO WA_/KYK/ISS_RKATARIF_N.


*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 CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_RKATARIF_N-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_RKATARIF_N-MEINH.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit AC112, internal->external for field TKGMEAN
CALL FUNCTION 'CONVERSION_EXIT_AC112_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_RKATARIF_N-TKGMEAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_RKATARIF_N-TKGMEAN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC112, internal->external for field TKVMEAN
CALL FUNCTION 'CONVERSION_EXIT_AC112_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_RKATARIF_N-TKVMEAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_RKATARIF_N-TKVMEAN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC112, internal->external for field TKFMEAN
CALL FUNCTION 'CONVERSION_EXIT_AC112_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_RKATARIF_N-TKFMEAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_RKATARIF_N-TKFMEAN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TARKZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_RKATARIF_N-TARKZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_RKATARIF_N-TARKZ.
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_/KYK/ISS_RKATARIF_N_STR, 
MEINH TYPE STRING,
KOSTL TYPE STRING,
LSTAR TYPE STRING,
KSKTXT TYPE STRING,
LAKTXT TYPE STRING,
KWAER TYPE STRING,
TKGMEAN TYPE STRING,
TKVMEAN TYPE STRING,
TKFMEAN TYPE STRING,
TARKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KYK/ISS_RKATARIF_N_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_/KYK/ISS_RKATARIF_N_STR-MEINH sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-KOSTL sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-LSTAR sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-KSKTXT sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-LAKTXT sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-KWAER sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-TKGMEAN sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-TKVMEAN sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-TKFMEAN sy-vline 
WA_/KYK/ISS_RKATARIF_N_STR-TARKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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