ABAP Select data from SAP table PRUCNSINV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRUCNSINV
*  INTO TABLE @DATA(IT_PRUCNSINV2).
*--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_PRUCNSINV INDEX 1 INTO DATA(WA_PRUCNSINV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRUCNSINV>-MANDT = 1.
<PRUCNSINV>-COMPANYCODE = 1.
<PRUCNSINV>-ACCOUNTINGDOCUMENT = 1.
<PRUCNSINV>-FISCALYEAR = 1.
<PRUCNSINV>-EXTERNALINVOICE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRUCNSINV-INVOICEDATE, sy-vline,
  WA_PRUCNSINV-SUPPLIER, sy-vline,
  WA_PRUCNSINV-CUSTOMER, sy-vline,
  WA_PRUCNSINV-DEBITCREDITCODE_REAL, sy-vline,
  WA_PRUCNSINV-ISREVERSAL, sy-vline,
  WA_PRUCNSINV-ISREVERSED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRUCNSINV 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_PRUCNSINV 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_PRUCNSINV INTO WA_PRUCNSINV.


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

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

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

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

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

*Conversion exit GJAHR, internal->external for field CONNECTEDFISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PRUCNSINV-CONNECTEDFISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRUCNSINV-CONNECTEDFISCALYEAR.
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_PRUCNSINV_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
FISCALYEAR TYPE STRING,
EXTERNALINVOICE TYPE STRING,
INVOICEDATE TYPE STRING,
SUPPLIER TYPE STRING,
CUSTOMER TYPE STRING,
DEBITCREDITCODE_REAL TYPE STRING,
ISREVERSAL TYPE STRING,
ISREVERSED TYPE STRING,
ISPSEUDOREVERSED TYPE STRING,
ISPSEUDOREVERSAL TYPE STRING,
CONNECTEDACCOUNTINGDOCUMENT TYPE STRING,
CONNECTEDFISCALYEAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRUCNSINV_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_PRUCNSINV_STR-MANDT sy-vline 
WA_PRUCNSINV_STR-COMPANYCODE sy-vline 
WA_PRUCNSINV_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_PRUCNSINV_STR-FISCALYEAR sy-vline 
WA_PRUCNSINV_STR-EXTERNALINVOICE sy-vline 
WA_PRUCNSINV_STR-INVOICEDATE sy-vline 
WA_PRUCNSINV_STR-SUPPLIER sy-vline 
WA_PRUCNSINV_STR-CUSTOMER sy-vline 
WA_PRUCNSINV_STR-DEBITCREDITCODE_REAL sy-vline 
WA_PRUCNSINV_STR-ISREVERSAL sy-vline 
WA_PRUCNSINV_STR-ISREVERSED sy-vline 
WA_PRUCNSINV_STR-ISPSEUDOREVERSED sy-vline 
WA_PRUCNSINV_STR-ISPSEUDOREVERSAL sy-vline 
WA_PRUCNSINV_STR-CONNECTEDACCOUNTINGDOCUMENT sy-vline 
WA_PRUCNSINV_STR-CONNECTEDFISCALYEAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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