ABAP Select data from SAP table PKHDCALC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKHDCALC
*  INTO TABLE @DATA(IT_PKHDCALC2).
*--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_PKHDCALC INDEX 1 INTO DATA(WA_PKHDCALC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKHDCALC>-BEHMG = 1.
<PKHDCALC>-KCART = 1.
<PKHDCALC>-KCPRF = 1.
<PKHDCALC>-PKSTE = 1.
<PKHDCALC>-PKSTF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKHDCALC-PKSTU, sy-vline,
  WA_PKHDCALC-KCSAF, sy-vline,
  WA_PKHDCALC-KCCON, sy-vline,
  WA_PKHDCALC-PKRMG, sy-vline,
  WA_PKHDCALC-KWBZD, sy-vline,
  WA_PKHDCALC-KWBZM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKHDCALC 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_PKHDCALC 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_PKHDCALC INTO WA_PKHDCALC.


*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 TSTRN, internal->external for field KWBZM
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_PKHDCALC-KWBZM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHDCALC-KWBZM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field KNFZM
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_PKHDCALC-KNFZM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHDCALC-KNFZM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field KWTZM
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_PKHDCALC-KWTZM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHDCALC-KWTZM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field KITZM
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_PKHDCALC-KITZM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHDCALC-KITZM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field PINTVM
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_PKHDCALC-PINTVM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHDCALC-PINTVM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PKHDCALC-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHDCALC-MEINS.
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_PKHDCALC_STR, 
BEHMG TYPE STRING,
KCART TYPE STRING,
KCPRF TYPE STRING,
PKSTE TYPE STRING,
PKSTF TYPE STRING,
PKSTU TYPE STRING,
KCSAF TYPE STRING,
KCCON TYPE STRING,
PKRMG TYPE STRING,
KWBZD TYPE STRING,
KWBZM TYPE STRING,
KNFZD TYPE STRING,
KNFZM TYPE STRING,
KWTZD TYPE STRING,
KWTZM TYPE STRING,
KITZD TYPE STRING,
KITZM TYPE STRING,
KDMBUF TYPE STRING,
KSPBUF TYPE STRING,
PINTVD TYPE STRING,
PINTVM TYPE STRING,
MEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKHDCALC_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_PKHDCALC_STR-BEHMG sy-vline 
WA_PKHDCALC_STR-KCART sy-vline 
WA_PKHDCALC_STR-KCPRF sy-vline 
WA_PKHDCALC_STR-PKSTE sy-vline 
WA_PKHDCALC_STR-PKSTF sy-vline 
WA_PKHDCALC_STR-PKSTU sy-vline 
WA_PKHDCALC_STR-KCSAF sy-vline 
WA_PKHDCALC_STR-KCCON sy-vline 
WA_PKHDCALC_STR-PKRMG sy-vline 
WA_PKHDCALC_STR-KWBZD sy-vline 
WA_PKHDCALC_STR-KWBZM sy-vline 
WA_PKHDCALC_STR-KNFZD sy-vline 
WA_PKHDCALC_STR-KNFZM sy-vline 
WA_PKHDCALC_STR-KWTZD sy-vline 
WA_PKHDCALC_STR-KWTZM sy-vline 
WA_PKHDCALC_STR-KITZD sy-vline 
WA_PKHDCALC_STR-KITZM sy-vline 
WA_PKHDCALC_STR-KDMBUF sy-vline 
WA_PKHDCALC_STR-KSPBUF sy-vline 
WA_PKHDCALC_STR-PINTVD sy-vline 
WA_PKHDCALC_STR-PINTVM sy-vline 
WA_PKHDCALC_STR-MEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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