ABAP Select data from SAP table KALKCOM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KALKCOM
*  INTO TABLE @DATA(IT_KALKCOM2).
*--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_KALKCOM INDEX 1 INTO DATA(WA_KALKCOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KALKCOM>-KZKUP = 1.
<KALKCOM>-SANKA = 1.
<KALKCOM>-STLKN = 1.
<KALKCOM>-BWART = 1.
<KALKCOM>-SHKZG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KALKCOM-PSPEL, sy-vline,
  WA_KALKCOM-KZBWS, sy-vline,
  WA_KALKCOM-SOBKZ, sy-vline,
  WA_KALKCOM-SBDKZ, sy-vline,
  WA_KALKCOM-CHARG, sy-vline,
  WA_KALKCOM-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KALKCOM 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_KALKCOM 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_KALKCOM INTO WA_KALKCOM.


*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 ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_KALKCOM-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALKCOM-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KALKCOM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALKCOM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KALKCOM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALKCOM-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KALKCOM-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALKCOM-ERFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_KALKCOM-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALKCOM-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_KALKCOM-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALKCOM-STLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field NET_AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KALKCOM-NET_AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALKCOM-NET_AUFNR.
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_KALKCOM_STR, 
KZKUP TYPE STRING,
SANKA TYPE STRING,
STLKN TYPE STRING,
BWART TYPE STRING,
SHKZG TYPE STRING,
PSPEL TYPE STRING,
KZBWS TYPE STRING,
SOBKZ TYPE STRING,
SBDKZ TYPE STRING,
CHARG TYPE STRING,
MATNR TYPE STRING,
FMENG TYPE STRING,
MEINS TYPE STRING,
BDMNG TYPE STRING,
AMGLG TYPE STRING,
ERFMG TYPE STRING,
AMGKO TYPE STRING,
ERFME TYPE STRING,
KZWSO TYPE STRING,
POSNR TYPE STRING,
BDTER TYPE STRING,
SGTXT TYPE STRING,
MATXT TYPE STRING,
CUOBJ TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STPOZ TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
WAERS TYPE STRING,
GPREIS TYPE STRING,
PEINH TYPE STRING,
FPREIS TYPE STRING,
SAKNR TYPE STRING,
HRKFT TYPE STRING,
HKMAT TYPE STRING,
KZKFG TYPE STRING,
FLGEX TYPE STRING,
DBSKZ TYPE STRING,
PEINH_2 TYPE STRING,
GPREIS_2 TYPE STRING,
FPREIS_2 TYPE STRING,
NET_AUFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KALKCOM_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_KALKCOM_STR-KZKUP sy-vline 
WA_KALKCOM_STR-SANKA sy-vline 
WA_KALKCOM_STR-STLKN sy-vline 
WA_KALKCOM_STR-BWART sy-vline 
WA_KALKCOM_STR-SHKZG sy-vline 
WA_KALKCOM_STR-PSPEL sy-vline 
WA_KALKCOM_STR-KZBWS sy-vline 
WA_KALKCOM_STR-SOBKZ sy-vline 
WA_KALKCOM_STR-SBDKZ sy-vline 
WA_KALKCOM_STR-CHARG sy-vline 
WA_KALKCOM_STR-MATNR sy-vline 
WA_KALKCOM_STR-FMENG sy-vline 
WA_KALKCOM_STR-MEINS sy-vline 
WA_KALKCOM_STR-BDMNG sy-vline 
WA_KALKCOM_STR-AMGLG sy-vline 
WA_KALKCOM_STR-ERFMG sy-vline 
WA_KALKCOM_STR-AMGKO sy-vline 
WA_KALKCOM_STR-ERFME sy-vline 
WA_KALKCOM_STR-KZWSO sy-vline 
WA_KALKCOM_STR-POSNR sy-vline 
WA_KALKCOM_STR-BDTER sy-vline 
WA_KALKCOM_STR-SGTXT sy-vline 
WA_KALKCOM_STR-MATXT sy-vline 
WA_KALKCOM_STR-CUOBJ sy-vline 
WA_KALKCOM_STR-STLTY sy-vline 
WA_KALKCOM_STR-STLNR sy-vline 
WA_KALKCOM_STR-STPOZ sy-vline 
WA_KALKCOM_STR-RSNUM sy-vline 
WA_KALKCOM_STR-RSPOS sy-vline 
WA_KALKCOM_STR-RSART sy-vline 
WA_KALKCOM_STR-WAERS sy-vline 
WA_KALKCOM_STR-GPREIS sy-vline 
WA_KALKCOM_STR-PEINH sy-vline 
WA_KALKCOM_STR-FPREIS sy-vline 
WA_KALKCOM_STR-SAKNR sy-vline 
WA_KALKCOM_STR-HRKFT sy-vline 
WA_KALKCOM_STR-HKMAT sy-vline 
WA_KALKCOM_STR-KZKFG sy-vline 
WA_KALKCOM_STR-FLGEX sy-vline 
WA_KALKCOM_STR-DBSKZ sy-vline 
WA_KALKCOM_STR-PEINH_2 sy-vline 
WA_KALKCOM_STR-GPREIS_2 sy-vline 
WA_KALKCOM_STR-FPREIS_2 sy-vline 
WA_KALKCOM_STR-NET_AUFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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