ABAP Select data from SAP table PRULNKCTINV0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PRULNKCTINV0 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 PRULNKCTINV0. 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 PRULNKCTINV0 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_PRULNKCTINV0 TYPE STANDARD TABLE OF PRULNKCTINV0,
      WA_PRULNKCTINV0 TYPE PRULNKCTINV0,
      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: <PRULNKCTINV0> TYPE PRULNKCTINV0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PRULNKCTINV0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PRULNKCTINV0
  INTO TABLE IT_PRULNKCTINV0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRULNKCTINV0
*  INTO TABLE @DATA(IT_PRULNKCTINV02).
*--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_PRULNKCTINV0 INDEX 1 INTO DATA(WA_PRULNKCTINV02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PRULNKCTINV0 ASSIGNING <PRULNKCTINV0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRULNKCTINV0>-MANDT = 1.
<PRULNKCTINV0>-INTERNALTABLEKEYFIELD = 1.
<PRULNKCTINV0>-COMPANYCODE = 1.
<PRULNKCTINV0>-INVOICE = 1.
<PRULNKCTINV0>-INVOICEYEAR = 1.

ENDLOOP.

LOOP AT IT_PRULNKCTINV0 INTO WA_PRULNKCTINV0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRULNKCTINV0-CORRECTIONINVOICE, sy-vline,
  WA_PRULNKCTINV0-CORRECTIONINVOICEYEAR, sy-vline,
  WA_PRULNKCTINV0-REVISIONNUMBER, sy-vline,
  WA_PRULNKCTINV0-REVISIONINVOICE, sy-vline,
  WA_PRULNKCTINV0-REVISIONINVOICEYEAR, sy-vline,
  WA_PRULNKCTINV0-ORIGINALINVOICEREVISIONNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRULNKCTINV0 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_PRULNKCTINV0 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_PRULNKCTINV0 INTO WA_PRULNKCTINV0.


*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 INVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field INVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CORRECTIONINVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-CORRECTIONINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-CORRECTIONINVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CORRECTIONINVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-CORRECTIONINVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-CORRECTIONINVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REVISIONINVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-REVISIONINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-REVISIONINVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field REVISIONINVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-REVISIONINVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-REVISIONINVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACCOUNTINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-ACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-ACCOUNTINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-FISCALYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RU_INCOMINGINVOICENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-RU_INCOMINGINVOICENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-RU_INCOMINGINVOICENUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RU_INCOMINGINVOICEFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-RU_INCOMINGINVOICEFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-RU_INCOMINGINVOICEFISCALYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INCOMINGCORRECTIONINVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INCOMINGCORRECTIONINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INCOMINGCORRECTIONINVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field INCOMINGCORRECTIONINVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INCOMINGCORRECTIONINVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INCOMINGCORRECTIONINVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INCOMINGREVISIONINVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INCOMINGREVISIONINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INCOMINGREVISIONINVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field INCOMINGREVISIONINVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INCOMINGREVISIONINVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INCOMINGREVISIONINVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INCGINVOICEACCOUNTINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INCGINVOICEACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INCGINVOICEACCOUNTINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field INCGINVOICEACCTGDOCFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-INCGINVOICEACCTGDOCFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-INCGINVOICEACCTGDOCFISCALYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field COMMSNTRADEINVOICELINKEDAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-COMMSNTRADEINVOICELINKEDAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-COMMSNTRADEINVOICELINKEDAMOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field COMMSNTRADEINVCLINKEDVATAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-COMMSNTRADEINVCLINKEDVATAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-COMMSNTRADEINVCLINKEDVATAMOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field BSETTAXAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV0-BSETTAXAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV0-BSETTAXAMOUNT.
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_PRULNKCTINV0_STR, 
MANDT TYPE STRING,
INTERNALTABLEKEYFIELD TYPE STRING,
COMPANYCODE TYPE STRING,
INVOICE TYPE STRING,
INVOICEYEAR TYPE STRING,
CORRECTIONINVOICE TYPE STRING,
CORRECTIONINVOICEYEAR TYPE STRING,
REVISIONNUMBER TYPE STRING,
REVISIONINVOICE TYPE STRING,
REVISIONINVOICEYEAR TYPE STRING,
ORIGINALINVOICEREVISIONNUMBER TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
FISCALYEAR TYPE STRING,
RU_INCOMINGINVOICECOMPANYCODE TYPE STRING,
RU_INCOMINGINVOICENUMBER TYPE STRING,
RU_INCOMINGINVOICEFISCALYEAR TYPE STRING,
INCOMINGCORRECTIONINVOICE TYPE STRING,
INCOMINGCORRECTIONINVOICEYEAR TYPE STRING,
INCOMINGREVISIONNUMBER TYPE STRING,
INCOMINGREVISIONINVOICE TYPE STRING,
INCOMINGREVISIONINVOICEYEAR TYPE STRING,
INCGORIGLINVOICEREVISIONNUMBER TYPE STRING,
INCGINVOICEACCOUNTINGDOCUMENT TYPE STRING,
INCGINVOICEACCTGDOCFISCALYEAR TYPE STRING,
COMMSNTRADEINVOICELINKEDAMOUNT TYPE STRING,
COMMSNTRADEINVCLINKEDVATAMOUNT TYPE STRING,
BSETTAXAMOUNT TYPE STRING,
BSETGROSSAMOUNTINTRANSCRCY TYPE STRING,
COMMSNTRADEINVOICELINKINGCRCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRULNKCTINV0_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_PRULNKCTINV0_STR-MANDT sy-vline 
WA_PRULNKCTINV0_STR-INTERNALTABLEKEYFIELD sy-vline 
WA_PRULNKCTINV0_STR-COMPANYCODE sy-vline 
WA_PRULNKCTINV0_STR-INVOICE sy-vline 
WA_PRULNKCTINV0_STR-INVOICEYEAR sy-vline 
WA_PRULNKCTINV0_STR-CORRECTIONINVOICE sy-vline 
WA_PRULNKCTINV0_STR-CORRECTIONINVOICEYEAR sy-vline 
WA_PRULNKCTINV0_STR-REVISIONNUMBER sy-vline 
WA_PRULNKCTINV0_STR-REVISIONINVOICE sy-vline 
WA_PRULNKCTINV0_STR-REVISIONINVOICEYEAR sy-vline 
WA_PRULNKCTINV0_STR-ORIGINALINVOICEREVISIONNUMBER sy-vline 
WA_PRULNKCTINV0_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_PRULNKCTINV0_STR-FISCALYEAR sy-vline 
WA_PRULNKCTINV0_STR-RU_INCOMINGINVOICECOMPANYCODE sy-vline 
WA_PRULNKCTINV0_STR-RU_INCOMINGINVOICENUMBER sy-vline 
WA_PRULNKCTINV0_STR-RU_INCOMINGINVOICEFISCALYEAR sy-vline 
WA_PRULNKCTINV0_STR-INCOMINGCORRECTIONINVOICE sy-vline 
WA_PRULNKCTINV0_STR-INCOMINGCORRECTIONINVOICEYEAR sy-vline 
WA_PRULNKCTINV0_STR-INCOMINGREVISIONNUMBER sy-vline 
WA_PRULNKCTINV0_STR-INCOMINGREVISIONINVOICE sy-vline 
WA_PRULNKCTINV0_STR-INCOMINGREVISIONINVOICEYEAR sy-vline 
WA_PRULNKCTINV0_STR-INCGORIGLINVOICEREVISIONNUMBER sy-vline 
WA_PRULNKCTINV0_STR-INCGINVOICEACCOUNTINGDOCUMENT sy-vline 
WA_PRULNKCTINV0_STR-INCGINVOICEACCTGDOCFISCALYEAR sy-vline 
WA_PRULNKCTINV0_STR-COMMSNTRADEINVOICELINKEDAMOUNT sy-vline 
WA_PRULNKCTINV0_STR-COMMSNTRADEINVCLINKEDVATAMOUNT sy-vline 
WA_PRULNKCTINV0_STR-BSETTAXAMOUNT sy-vline 
WA_PRULNKCTINV0_STR-BSETGROSSAMOUNTINTRANSCRCY sy-vline 
WA_PRULNKCTINV0_STR-COMMSNTRADEINVOICELINKINGCRCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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