ABAP Select data from SAP table PRULNKCTINV2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PRULNKCTINV2 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 PRULNKCTINV2. 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 PRULNKCTINV2 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_PRULNKCTINV2 TYPE STANDARD TABLE OF PRULNKCTINV2,
      WA_PRULNKCTINV2 TYPE PRULNKCTINV2,
      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: <PRULNKCTINV2> TYPE PRULNKCTINV2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PRULNKCTINV2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PRULNKCTINV2
  INTO TABLE IT_PRULNKCTINV2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRULNKCTINV2
*  INTO TABLE @DATA(IT_PRULNKCTINV22).
*--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_PRULNKCTINV2 INDEX 1 INTO DATA(WA_PRULNKCTINV22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PRULNKCTINV2 ASSIGNING <PRULNKCTINV2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRULNKCTINV2>-MANDT = 1.
<PRULNKCTINV2>-INTERNALTABLEKEYFIELD = 1.
<PRULNKCTINV2>-COMPANYCODE = 1.
<PRULNKCTINV2>-INVOICE = 1.
<PRULNKCTINV2>-INVOICEYEAR = 1.

ENDLOOP.

LOOP AT IT_PRULNKCTINV2 INTO WA_PRULNKCTINV2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRULNKCTINV2-ORIGINALINVOICEREVISIONNUMBER, sy-vline,
  WA_PRULNKCTINV2-CORRECTIONINVOICE, sy-vline,
  WA_PRULNKCTINV2-CORRECTIONINVOICEYEAR, sy-vline,
  WA_PRULNKCTINV2-CORRECTIONINVOICEREVISIONNMBR, sy-vline,
  WA_PRULNKCTINV2-RU_INCOMINGINVOICECOMPANYCODE, sy-vline,
  WA_PRULNKCTINV2-RU_INCOMINGINVOICENUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRULNKCTINV2 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_PRULNKCTINV2 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_PRULNKCTINV2 INTO WA_PRULNKCTINV2.


*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_PRULNKCTINV2-INVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-INVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field INVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-INVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-INVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CORRECTIONINVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-CORRECTIONINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-CORRECTIONINVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CORRECTIONINVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-CORRECTIONINVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-CORRECTIONINVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RU_INCOMINGINVOICENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-RU_INCOMINGINVOICENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-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_PRULNKCTINV2-RU_INCOMINGINVOICEFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-RU_INCOMINGINVOICEFISCALYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INCOMINGCORRECTIONINVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-INCOMINGCORRECTIONINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-INCOMINGCORRECTIONINVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field INCOMINGCORRECTIONINVOICEYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-INCOMINGCORRECTIONINVOICEYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-INCOMINGCORRECTIONINVOICEYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field COMMSNTRADEINVOICELINKEDAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-COMMSNTRADEINVOICELINKEDAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-COMMSNTRADEINVOICELINKEDAMOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field COMMSNTRADEINVCLINKEDVATAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_PRULNKCTINV2-COMMSNTRADEINVCLINKEDVATAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRULNKCTINV2-COMMSNTRADEINVCLINKEDVATAMOUNT.
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_PRULNKCTINV2_STR, 
MANDT TYPE STRING,
INTERNALTABLEKEYFIELD TYPE STRING,
COMPANYCODE TYPE STRING,
INVOICE TYPE STRING,
INVOICEYEAR TYPE STRING,
ORIGINALINVOICEREVISIONNUMBER TYPE STRING,
CORRECTIONINVOICE TYPE STRING,
CORRECTIONINVOICEYEAR TYPE STRING,
CORRECTIONINVOICEREVISIONNMBR TYPE STRING,
RU_INCOMINGINVOICECOMPANYCODE TYPE STRING,
RU_INCOMINGINVOICENUMBER TYPE STRING,
RU_INCOMINGINVOICEFISCALYEAR TYPE STRING,
INCGORIGLINVOICEREVISIONNUMBER TYPE STRING,
INCOMINGCORRECTIONINVOICE TYPE STRING,
INCOMINGCORRECTIONINVOICEYEAR TYPE STRING,
INCGCORRINVOICEREVISIONNMBR TYPE STRING,
COMMSNTRADEINVOICELINKEDAMOUNT TYPE STRING,
COMMSNTRADEINVCLINKEDVATAMOUNT TYPE STRING,
COMMSNTRADEINVOICELINKINGCRCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRULNKCTINV2_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_PRULNKCTINV2_STR-MANDT sy-vline 
WA_PRULNKCTINV2_STR-INTERNALTABLEKEYFIELD sy-vline 
WA_PRULNKCTINV2_STR-COMPANYCODE sy-vline 
WA_PRULNKCTINV2_STR-INVOICE sy-vline 
WA_PRULNKCTINV2_STR-INVOICEYEAR sy-vline 
WA_PRULNKCTINV2_STR-ORIGINALINVOICEREVISIONNUMBER sy-vline 
WA_PRULNKCTINV2_STR-CORRECTIONINVOICE sy-vline 
WA_PRULNKCTINV2_STR-CORRECTIONINVOICEYEAR sy-vline 
WA_PRULNKCTINV2_STR-CORRECTIONINVOICEREVISIONNMBR sy-vline 
WA_PRULNKCTINV2_STR-RU_INCOMINGINVOICECOMPANYCODE sy-vline 
WA_PRULNKCTINV2_STR-RU_INCOMINGINVOICENUMBER sy-vline 
WA_PRULNKCTINV2_STR-RU_INCOMINGINVOICEFISCALYEAR sy-vline 
WA_PRULNKCTINV2_STR-INCGORIGLINVOICEREVISIONNUMBER sy-vline 
WA_PRULNKCTINV2_STR-INCOMINGCORRECTIONINVOICE sy-vline 
WA_PRULNKCTINV2_STR-INCOMINGCORRECTIONINVOICEYEAR sy-vline 
WA_PRULNKCTINV2_STR-INCGCORRINVOICEREVISIONNMBR sy-vline 
WA_PRULNKCTINV2_STR-COMMSNTRADEINVOICELINKEDAMOUNT sy-vline 
WA_PRULNKCTINV2_STR-COMMSNTRADEINVCLINKEDVATAMOUNT sy-vline 
WA_PRULNKCTINV2_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.