ABAP Select data from SAP table IAPRESTRINV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IAPRESTRINV
*  INTO TABLE @DATA(IT_IAPRESTRINV2).
*--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_IAPRESTRINV INDEX 1 INTO DATA(WA_IAPRESTRINV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IAPRESTRINV>-MANDT = 1.
<IAPRESTRINV>-SUPPLIERINVOICE = 1.
<IAPRESTRINV>-FISCALYEAR = 1.
<IAPRESTRINV>-SUPPLIERINVOICEITEM = 1.
<IAPRESTRINV>-PURCHASEORDER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IAPRESTRINV-PURCHASEORDERITEM, sy-vline,
  WA_IAPRESTRINV-PLANT, sy-vline,
  WA_IAPRESTRINV-SUPPLIERINVOICEITEMTEXT, sy-vline,
  WA_IAPRESTRINV-PURCHASEORDERITEMMATERIAL, sy-vline,
  WA_IAPRESTRINV-PURCHASEORDERQUANTITYUNIT, sy-vline,
  WA_IAPRESTRINV-QUANTITYINPURCHASEORDERUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IAPRESTRINV 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_IAPRESTRINV 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_IAPRESTRINV INTO WA_IAPRESTRINV.


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

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

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

*Conversion exit MATN1, internal->external for field PURCHASEORDERITEMMATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IAPRESTRINV-PURCHASEORDERITEMMATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAPRESTRINV-PURCHASEORDERITEMMATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PURCHASEORDERQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IAPRESTRINV-PURCHASEORDERQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAPRESTRINV-PURCHASEORDERQUANTITYUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PURCHASEORDERPRICEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IAPRESTRINV-PURCHASEORDERPRICEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAPRESTRINV-PURCHASEORDERPRICEUNIT.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field INVOICINGPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IAPRESTRINV-INVOICINGPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAPRESTRINV-INVOICINGPARTY.
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_IAPRESTRINV_STR, 
MANDT TYPE STRING,
SUPPLIERINVOICE TYPE STRING,
FISCALYEAR TYPE STRING,
SUPPLIERINVOICEITEM TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
PLANT TYPE STRING,
SUPPLIERINVOICEITEMTEXT TYPE STRING,
PURCHASEORDERITEMMATERIAL TYPE STRING,
PURCHASEORDERQUANTITYUNIT TYPE STRING,
QUANTITYINPURCHASEORDERUNIT TYPE STRING,
PURCHASEORDERPRICEUNIT TYPE STRING,
QTYINPURCHASEORDERPRICEUNIT TYPE STRING,
SUPLRINVCDELIVERYCOSTCNDNTYPE TYPE STRING,
SUPLRINVCDELIVERYCOSTCNDNSTEP TYPE STRING,
SUPLRINVCDELIVERYCOSTCNDNCOUNT TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
SUPPLIERINVOICEITEMAMOUNT TYPE STRING,
ISSUBSEQUENTDEBITCREDIT TYPE STRING,
TAXCODE TYPE STRING,
TAXJURISDICTION TYPE STRING,
REFERENCEDOCUMENT TYPE STRING,
REFERENCEDOCUMENTFISCALYEAR TYPE STRING,
REFERENCEDOCUMENTITEM TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
DEBITCREDITCODE TYPE STRING,
FREIGHTSUPPLIER TYPE STRING,
ISNOTCASHDISCOUNTLIABLE TYPE STRING,
PURCHASINGDOCUMENTITEMCATEGORY TYPE STRING,
SUPLRINVCITEMHASPRICEVARIANCE TYPE STRING,
SUPLRINVCITEMHASQTYVARIANCE TYPE STRING,
SUPLRINVCITEMHASDATEVARIANCE TYPE STRING,
SUPLRINVCITEMHASORDPRCQTYVARC TYPE STRING,
SUPLRINVCITEMHASOTHERVARIANCE TYPE STRING,
SUPLRINVCITEMHASAMOUNTOUTSDTOL TYPE STRING,
SUPLRINVCITMHASQUALITYVARIANCE TYPE STRING,
INVOICINGPARTY TYPE STRING,
POSTINGDATE TYPE STRING,
DOCUMENTDATE TYPE STRING,
PAYMENTBLOCKINGREASON TYPE STRING,
SUPPLIERINVOICEIDBYINVCGPARTY TYPE STRING,
ISINVOICE TYPE STRING,
INVOICEGROSSAMOUNT TYPE STRING,
CREATEDBYUSER TYPE STRING,
SUPPLIERINVOICESTATUS TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
COMPANYCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IAPRESTRINV_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_IAPRESTRINV_STR-MANDT sy-vline 
WA_IAPRESTRINV_STR-SUPPLIERINVOICE sy-vline 
WA_IAPRESTRINV_STR-FISCALYEAR sy-vline 
WA_IAPRESTRINV_STR-SUPPLIERINVOICEITEM sy-vline 
WA_IAPRESTRINV_STR-PURCHASEORDER sy-vline 
WA_IAPRESTRINV_STR-PURCHASEORDERITEM sy-vline 
WA_IAPRESTRINV_STR-PLANT sy-vline 
WA_IAPRESTRINV_STR-SUPPLIERINVOICEITEMTEXT sy-vline 
WA_IAPRESTRINV_STR-PURCHASEORDERITEMMATERIAL sy-vline 
WA_IAPRESTRINV_STR-PURCHASEORDERQUANTITYUNIT sy-vline 
WA_IAPRESTRINV_STR-QUANTITYINPURCHASEORDERUNIT sy-vline 
WA_IAPRESTRINV_STR-PURCHASEORDERPRICEUNIT sy-vline 
WA_IAPRESTRINV_STR-QTYINPURCHASEORDERPRICEUNIT sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCDELIVERYCOSTCNDNTYPE sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCDELIVERYCOSTCNDNSTEP sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCDELIVERYCOSTCNDNCOUNT sy-vline 
WA_IAPRESTRINV_STR-DOCUMENTCURRENCY sy-vline 
WA_IAPRESTRINV_STR-SUPPLIERINVOICEITEMAMOUNT sy-vline 
WA_IAPRESTRINV_STR-ISSUBSEQUENTDEBITCREDIT sy-vline 
WA_IAPRESTRINV_STR-TAXCODE sy-vline 
WA_IAPRESTRINV_STR-TAXJURISDICTION sy-vline 
WA_IAPRESTRINV_STR-REFERENCEDOCUMENT sy-vline 
WA_IAPRESTRINV_STR-REFERENCEDOCUMENTFISCALYEAR sy-vline 
WA_IAPRESTRINV_STR-REFERENCEDOCUMENTITEM sy-vline 
WA_IAPRESTRINV_STR-PURCHASECONTRACT sy-vline 
WA_IAPRESTRINV_STR-PURCHASECONTRACTITEM sy-vline 
WA_IAPRESTRINV_STR-DEBITCREDITCODE sy-vline 
WA_IAPRESTRINV_STR-FREIGHTSUPPLIER sy-vline 
WA_IAPRESTRINV_STR-ISNOTCASHDISCOUNTLIABLE sy-vline 
WA_IAPRESTRINV_STR-PURCHASINGDOCUMENTITEMCATEGORY sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCITEMHASPRICEVARIANCE sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCITEMHASQTYVARIANCE sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCITEMHASDATEVARIANCE sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCITEMHASORDPRCQTYVARC sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCITEMHASOTHERVARIANCE sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCITEMHASAMOUNTOUTSDTOL sy-vline 
WA_IAPRESTRINV_STR-SUPLRINVCITMHASQUALITYVARIANCE sy-vline 
WA_IAPRESTRINV_STR-INVOICINGPARTY sy-vline 
WA_IAPRESTRINV_STR-POSTINGDATE sy-vline 
WA_IAPRESTRINV_STR-DOCUMENTDATE sy-vline 
WA_IAPRESTRINV_STR-PAYMENTBLOCKINGREASON sy-vline 
WA_IAPRESTRINV_STR-SUPPLIERINVOICEIDBYINVCGPARTY sy-vline 
WA_IAPRESTRINV_STR-ISINVOICE sy-vline 
WA_IAPRESTRINV_STR-INVOICEGROSSAMOUNT sy-vline 
WA_IAPRESTRINV_STR-CREATEDBYUSER sy-vline 
WA_IAPRESTRINV_STR-SUPPLIERINVOICESTATUS sy-vline 
WA_IAPRESTRINV_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_IAPRESTRINV_STR-COMPANYCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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