ABAP Select data from SAP table KPC_LINE_ITEM_PAYMENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPC_LINE_ITEM_PAYMENT
*  INTO TABLE @DATA(IT_KPC_LINE_ITEM_PAYMENT2).
*--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_KPC_LINE_ITEM_PAYMENT INDEX 1 INTO DATA(WA_KPC_LINE_ITEM_PAYMENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPC_LINE_ITEM_PAYMENT>-PROJECT_OBJECT = 1.
<KPC_LINE_ITEM_PAYMENT>-PROJECT_OBJECT = 1.
<KPC_LINE_ITEM_PAYMENT>-OBJECT_TYPE = 1.
<KPC_LINE_ITEM_PAYMENT>-OBJNR = 1.
<KPC_LINE_ITEM_PAYMENT>-VBUND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPC_LINE_ITEM_PAYMENT-KOKRS, sy-vline,
  WA_KPC_LINE_ITEM_PAYMENT-KOKRS_TXT, sy-vline,
  WA_KPC_LINE_ITEM_PAYMENT-BELNR, sy-vline,
  WA_KPC_LINE_ITEM_PAYMENT-BUZEI, sy-vline,
  WA_KPC_LINE_ITEM_PAYMENT-GJAHR, sy-vline,
  WA_KPC_LINE_ITEM_PAYMENT-PERIO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPC_LINE_ITEM_PAYMENT 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_KPC_LINE_ITEM_PAYMENT 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_KPC_LINE_ITEM_PAYMENT INTO WA_KPC_LINE_ITEM_PAYMENT.


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

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

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

*Conversion exit FMCIL, internal->external for field FIPEX
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_KPC_LINE_ITEM_PAYMENT-FIPEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPC_LINE_ITEM_PAYMENT-FIPEX.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field BELNR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KPC_LINE_ITEM_PAYMENT-BELNR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPC_LINE_ITEM_PAYMENT-BELNR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WTGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KPC_LINE_ITEM_PAYMENT-WTGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPC_LINE_ITEM_PAYMENT-WTGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WOGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KPC_LINE_ITEM_PAYMENT-WOGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPC_LINE_ITEM_PAYMENT-WOGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KPC_LINE_ITEM_PAYMENT-WKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPC_LINE_ITEM_PAYMENT-WKGBTR.
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_KPC_LINE_ITEM_PAYMENT_STR, 
PROJECT_OBJECT TYPE STRING,
PROJECT_OBJECT TYPE STRING,
OBJECT_TYPE TYPE STRING,
OBJNR TYPE STRING,
VBUND TYPE STRING,
KOKRS TYPE STRING,
KOKRS_TXT TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
GJAHR TYPE STRING,
PERIO TYPE STRING,
POSIT TYPE STRING,
FIPEX TYPE STRING,
FIPEX_TXT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
REFBN TYPE STRING,
REFBT TYPE STRING,
BELTP TYPE STRING,
BLTXT TYPE STRING,
BUKRS1 TYPE STRING,
BELNR1 TYPE STRING,
BUZEI1 TYPE STRING,
ZHLDT TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
WTGBTR TYPE STRING,
TWAER TYPE STRING,
WOGBTR TYPE STRING,
OWAER TYPE STRING,
WKGBTR TYPE STRING,
KWAER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPC_LINE_ITEM_PAYMENT_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_KPC_LINE_ITEM_PAYMENT_STR-PROJECT_OBJECT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-PROJECT_OBJECT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-OBJECT_TYPE sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-OBJNR sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-VBUND sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-KOKRS sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-KOKRS_TXT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BELNR sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BUZEI sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-GJAHR sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-PERIO sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-POSIT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-FIPEX sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-FIPEX_TXT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-EBELN sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-EBELP sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-REFBN sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-REFBT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BELTP sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BLTXT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BUKRS1 sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BELNR1 sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BUZEI1 sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-ZHLDT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BUDAT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-BLDAT sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-WTGBTR sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-TWAER sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-WOGBTR sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-OWAER sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-WKGBTR sy-vline 
WA_KPC_LINE_ITEM_PAYMENT_STR-KWAER sy-vline      INTO ld_text SEPARATED BY SPACE.

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