ABAP Select data from SAP table RKLIS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKLIS
*  INTO TABLE @DATA(IT_RKLIS2).
*--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_RKLIS INDEX 1 INTO DATA(WA_RKLIS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKLIS>-KOKRS = 1.
<RKLIS>-VERSN = 1.
<RKLIS>-VVERS = 1.
<RKLIS>-GJAHR = 1.
<RKLIS>-VJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKLIS-PERIO, sy-vline,
  WA_RKLIS-PERAB, sy-vline,
  WA_RKLIS-PERBI, sy-vline,
  WA_RKLIS-VPERV, sy-vline,
  WA_RKLIS-VPERB, sy-vline,
  WA_RKLIS-KOSTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKLIS 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_RKLIS 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_RKLIS INTO WA_RKLIS.


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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RKLIS-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKLIS-MEINH.
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_RKLIS_STR, 
KOKRS TYPE STRING,
VERSN TYPE STRING,
VVERS TYPE STRING,
GJAHR TYPE STRING,
VJAHR TYPE STRING,
PERIO TYPE STRING,
PERAB TYPE STRING,
PERBI TYPE STRING,
VPERV TYPE STRING,
VPERB TYPE STRING,
KOSTL TYPE STRING,
KSGRU TYPE STRING,
LSTAR TYPE STRING,
HLSTA TYPE STRING,
KSTRG TYPE STRING,
HSTRG TYPE STRING,
PRZNR TYPE STRING,
PHINR TYPE STRING,
STAGR TYPE STRING,
BELNR TYPE STRING,
LISBTR TYPE STRING,
SMEBTR TYPE STRING,
MEINH TYPE STRING,
TESTLAUF TYPE STRING,
LISTFLG TYPE STRING,
BATCHFLG TYPE STRING,
KZKOSTL TYPE STRING,
KZKSGRU TYPE STRING,
KZALLEKST TYPE STRING,
KZPRZNR TYPE STRING,
KZPHINR TYPE STRING,
KZALLEPRZ TYPE STRING,
KZKSTRG TYPE STRING,
KZHSTRG TYPE STRING,
KZALLEKTR TYPE STRING,
KZLSTAR TYPE STRING,
KZHLSTA TYPE STRING,
KZALLELST TYPE STRING,
UP_DATE TYPE STRING,
NOUPDATE TYPE STRING,
ZUSATZ TYPE STRING,
ZUSATZ1 TYPE STRING,
PARAMETER TYPE STRING,
WARNUNG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKLIS_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_RKLIS_STR-KOKRS sy-vline 
WA_RKLIS_STR-VERSN sy-vline 
WA_RKLIS_STR-VVERS sy-vline 
WA_RKLIS_STR-GJAHR sy-vline 
WA_RKLIS_STR-VJAHR sy-vline 
WA_RKLIS_STR-PERIO sy-vline 
WA_RKLIS_STR-PERAB sy-vline 
WA_RKLIS_STR-PERBI sy-vline 
WA_RKLIS_STR-VPERV sy-vline 
WA_RKLIS_STR-VPERB sy-vline 
WA_RKLIS_STR-KOSTL sy-vline 
WA_RKLIS_STR-KSGRU sy-vline 
WA_RKLIS_STR-LSTAR sy-vline 
WA_RKLIS_STR-HLSTA sy-vline 
WA_RKLIS_STR-KSTRG sy-vline 
WA_RKLIS_STR-HSTRG sy-vline 
WA_RKLIS_STR-PRZNR sy-vline 
WA_RKLIS_STR-PHINR sy-vline 
WA_RKLIS_STR-STAGR sy-vline 
WA_RKLIS_STR-BELNR sy-vline 
WA_RKLIS_STR-LISBTR sy-vline 
WA_RKLIS_STR-SMEBTR sy-vline 
WA_RKLIS_STR-MEINH sy-vline 
WA_RKLIS_STR-TESTLAUF sy-vline 
WA_RKLIS_STR-LISTFLG sy-vline 
WA_RKLIS_STR-BATCHFLG sy-vline 
WA_RKLIS_STR-KZKOSTL sy-vline 
WA_RKLIS_STR-KZKSGRU sy-vline 
WA_RKLIS_STR-KZALLEKST sy-vline 
WA_RKLIS_STR-KZPRZNR sy-vline 
WA_RKLIS_STR-KZPHINR sy-vline 
WA_RKLIS_STR-KZALLEPRZ sy-vline 
WA_RKLIS_STR-KZKSTRG sy-vline 
WA_RKLIS_STR-KZHSTRG sy-vline 
WA_RKLIS_STR-KZALLEKTR sy-vline 
WA_RKLIS_STR-KZLSTAR sy-vline 
WA_RKLIS_STR-KZHLSTA sy-vline 
WA_RKLIS_STR-KZALLELST sy-vline 
WA_RKLIS_STR-UP_DATE sy-vline 
WA_RKLIS_STR-NOUPDATE sy-vline 
WA_RKLIS_STR-ZUSATZ sy-vline 
WA_RKLIS_STR-ZUSATZ1 sy-vline 
WA_RKLIS_STR-PARAMETER sy-vline 
WA_RKLIS_STR-WARNUNG sy-vline      INTO ld_text SEPARATED BY SPACE.

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