ABAP Select data from SAP table KKALKKAG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKALKKAG
*  INTO TABLE @DATA(IT_KKALKKAG2).
*--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_KKALKKAG INDEX 1 INTO DATA(WA_KKALKKAG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKALKKAG>-PROTOKOLL = 1.
<KKALKKAG>-PROTKL_KLS = 1.
<KKALKKAG>-PROTKL_VON = 1.
<KKALKKAG>-PROTKL_BIS = 1.
<KKALKKAG>-VERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKALKKAG-ABGRPERIOD, sy-vline,
  WA_KKALKKAG-AUFTRAGSNR, sy-vline,
  WA_KKALKKAG-ABGRBEGINN, sy-vline,
  WA_KKALKKAG-OFFENBEGIN, sy-vline,
  WA_KKALKKAG-ABGRENDE, sy-vline,
  WA_KKALKKAG-PERIODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKALKKAG 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_KKALKKAG 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_KKALKKAG INTO WA_KKALKKAG.


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

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

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

*Conversion exit ABPSN, internal->external for field PROJEKTID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_KKALKKAG-PROJEKTID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKALKKAG-PROJEKTID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PRJSTRPLID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_KKALKKAG-PRJSTRPLID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKALKKAG-PRJSTRPLID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field BIS_ABGR_J
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KKALKKAG-BIS_ABGR_J
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKALKKAG-BIS_ABGR_J.
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_KKALKKAG_STR, 
PROTOKOLL TYPE STRING,
PROTKL_KLS TYPE STRING,
PROTKL_VON TYPE STRING,
PROTKL_BIS TYPE STRING,
VERSION TYPE STRING,
ABGRPERIOD TYPE STRING,
AUFTRAGSNR TYPE STRING,
ABGRBEGINN TYPE STRING,
OFFENBEGIN TYPE STRING,
ABGRENDE TYPE STRING,
PERIODE TYPE STRING,
FLGPERIODE TYPE STRING,
COMMITWORK TYPE STRING,
KUMULIERT TYPE STRING,
KOKRS TYPE STRING,
BUKRS TYPE STRING,
OBJEKTNR TYPE STRING,
EROFNG_DAT TYPE STRING,
ABGR_SCHL TYPE STRING,
OBJEKTART TYPE STRING,
AUFTRAGTYP TYPE STRING,
LEDGER TYPE STRING,
ABGRUPDATE TYPE STRING,
EINZELPOST TYPE STRING,
PROJEKTID TYPE STRING,
PRJSTRPLID TYPE STRING,
KOPFGRUPPE TYPE STRING,
VERTRBSBLG TYPE STRING,
VERTRBLGPS TYPE STRING,
ANKREUZFLD TYPE STRING,
CONFIRM TYPE STRING,
MASCH_LOE TYPE STRING,
MAN_LOE TYPE STRING,
MANV_LOE TYPE STRING,
MASCH_DP_LOE TYPE STRING,
R_MESSAGE TYPE STRING,
B_MESSAGE TYPE STRING,
V_MESSAGE TYPE STRING,
KATEGORIE TYPE STRING,
BELEGNR TYPE STRING,
BIS_ABGR_J TYPE STRING,
BIS_ABGR_M TYPE STRING,
LF_END_DAT TYPE STRING,
NUR_MANUEL TYPE STRING,
OBJ_WAER_R TYPE STRING,
WAEHRS_MAN TYPE STRING,
ENQUEUE TYPE STRING,
TABG_DAT TYPE STRING,
KUMUL_LOE TYPE STRING,
NUR_MASCHI TYPE STRING,
ABGR_TYP TYPE STRING,
ERLOES_OBJ TYPE STRING,
ABGR_CHANGED TYPE STRING,
WAEHRS_OBJ_FORCE TYPE STRING,
PROT_SICHERN TYPE STRING,
PROT_MIT_INFO TYPE STRING,
MIT_ARB_VORRAT TYPE STRING,
OHNE_0ZEILEN TYPE STRING,
VERSION_SETZEN TYPE STRING,
EINZEL_VERARB TYPE STRING,
ZEITFIBU TYPE STRING,
LESEN_OBJ_LDB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKALKKAG_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_KKALKKAG_STR-PROTOKOLL sy-vline 
WA_KKALKKAG_STR-PROTKL_KLS sy-vline 
WA_KKALKKAG_STR-PROTKL_VON sy-vline 
WA_KKALKKAG_STR-PROTKL_BIS sy-vline 
WA_KKALKKAG_STR-VERSION sy-vline 
WA_KKALKKAG_STR-ABGRPERIOD sy-vline 
WA_KKALKKAG_STR-AUFTRAGSNR sy-vline 
WA_KKALKKAG_STR-ABGRBEGINN sy-vline 
WA_KKALKKAG_STR-OFFENBEGIN sy-vline 
WA_KKALKKAG_STR-ABGRENDE sy-vline 
WA_KKALKKAG_STR-PERIODE sy-vline 
WA_KKALKKAG_STR-FLGPERIODE sy-vline 
WA_KKALKKAG_STR-COMMITWORK sy-vline 
WA_KKALKKAG_STR-KUMULIERT sy-vline 
WA_KKALKKAG_STR-KOKRS sy-vline 
WA_KKALKKAG_STR-BUKRS sy-vline 
WA_KKALKKAG_STR-OBJEKTNR sy-vline 
WA_KKALKKAG_STR-EROFNG_DAT sy-vline 
WA_KKALKKAG_STR-ABGR_SCHL sy-vline 
WA_KKALKKAG_STR-OBJEKTART sy-vline 
WA_KKALKKAG_STR-AUFTRAGTYP sy-vline 
WA_KKALKKAG_STR-LEDGER sy-vline 
WA_KKALKKAG_STR-ABGRUPDATE sy-vline 
WA_KKALKKAG_STR-EINZELPOST sy-vline 
WA_KKALKKAG_STR-PROJEKTID sy-vline 
WA_KKALKKAG_STR-PRJSTRPLID sy-vline 
WA_KKALKKAG_STR-KOPFGRUPPE sy-vline 
WA_KKALKKAG_STR-VERTRBSBLG sy-vline 
WA_KKALKKAG_STR-VERTRBLGPS sy-vline 
WA_KKALKKAG_STR-ANKREUZFLD sy-vline 
WA_KKALKKAG_STR-CONFIRM sy-vline 
WA_KKALKKAG_STR-MASCH_LOE sy-vline 
WA_KKALKKAG_STR-MAN_LOE sy-vline 
WA_KKALKKAG_STR-MANV_LOE sy-vline 
WA_KKALKKAG_STR-MASCH_DP_LOE sy-vline 
WA_KKALKKAG_STR-R_MESSAGE sy-vline 
WA_KKALKKAG_STR-B_MESSAGE sy-vline 
WA_KKALKKAG_STR-V_MESSAGE sy-vline 
WA_KKALKKAG_STR-KATEGORIE sy-vline 
WA_KKALKKAG_STR-BELEGNR sy-vline 
WA_KKALKKAG_STR-BIS_ABGR_J sy-vline 
WA_KKALKKAG_STR-BIS_ABGR_M sy-vline 
WA_KKALKKAG_STR-LF_END_DAT sy-vline 
WA_KKALKKAG_STR-NUR_MANUEL sy-vline 
WA_KKALKKAG_STR-OBJ_WAER_R sy-vline 
WA_KKALKKAG_STR-WAEHRS_MAN sy-vline 
WA_KKALKKAG_STR-ENQUEUE sy-vline 
WA_KKALKKAG_STR-TABG_DAT sy-vline 
WA_KKALKKAG_STR-KUMUL_LOE sy-vline 
WA_KKALKKAG_STR-NUR_MASCHI sy-vline 
WA_KKALKKAG_STR-ABGR_TYP sy-vline 
WA_KKALKKAG_STR-ERLOES_OBJ sy-vline 
WA_KKALKKAG_STR-ABGR_CHANGED sy-vline 
WA_KKALKKAG_STR-WAEHRS_OBJ_FORCE sy-vline 
WA_KKALKKAG_STR-PROT_SICHERN sy-vline 
WA_KKALKKAG_STR-PROT_MIT_INFO sy-vline 
WA_KKALKKAG_STR-MIT_ARB_VORRAT sy-vline 
WA_KKALKKAG_STR-OHNE_0ZEILEN sy-vline 
WA_KKALKKAG_STR-VERSION_SETZEN sy-vline 
WA_KKALKKAG_STR-EINZEL_VERARB sy-vline 
WA_KKALKKAG_STR-ZEITFIBU sy-vline 
WA_KKALKKAG_STR-LESEN_OBJ_LDB sy-vline      INTO ld_text SEPARATED BY SPACE.

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