ABAP Select data from SAP table IAPISINVOICE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IAPISINVOICE
*  INTO TABLE @DATA(IT_IAPISINVOICE2).
*--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_IAPISINVOICE INDEX 1 INTO DATA(WA_IAPISINVOICE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IAPISINVOICE>-MANDT = 1.
<IAPISINVOICE>-SUPPLIERINVOICEUPLOADUUID = 1.
<IAPISINVOICE>-ROOTDRAFTKEY = 1.
<IAPISINVOICE>-CREATIONDATE = 1.
<IAPISINVOICE>-SUPPLIERINVOICEUPLOADSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IAPISINVOICE-SUPPLIERINVOICE, sy-vline,
  WA_IAPISINVOICE-FISCALYEAR, sy-vline,
  WA_IAPISINVOICE-INVOICINGPARTY, sy-vline,
  WA_IAPISINVOICE-DOCUMENTDATE, sy-vline,
  WA_IAPISINVOICE-POSTINGDATE, sy-vline,
  WA_IAPISINVOICE-DOCUMENTCURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IAPISINVOICE 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_IAPISINVOICE 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_IAPISINVOICE INTO WA_IAPISINVOICE.


*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_IAPISINVOICE-SUPPLIERINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAPISINVOICE-SUPPLIERINVOICE.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field PAYTSLIPWTHREFREFERENCE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IAPISINVOICE-PAYTSLIPWTHREFREFERENCE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IAPISINVOICE-PAYTSLIPWTHREFREFERENCE.
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_IAPISINVOICE_STR, 
MANDT TYPE STRING,
SUPPLIERINVOICEUPLOADUUID TYPE STRING,
ROOTDRAFTKEY TYPE STRING,
CREATIONDATE TYPE STRING,
SUPPLIERINVOICEUPLOADSTATUS TYPE STRING,
SUPPLIERINVOICE TYPE STRING,
FISCALYEAR TYPE STRING,
INVOICINGPARTY TYPE STRING,
DOCUMENTDATE TYPE STRING,
POSTINGDATE TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
SUPPLIERINVOICEORIGIN TYPE STRING,
CREATEDBYUSER TYPE STRING,
SUPPLIERINVOICEIDBYINVCGPARTY TYPE STRING,
COMPANYCODE TYPE STRING,
DUECALCULATIONBASEDATE TYPE STRING,
CASHDISCOUNT1DAYS TYPE STRING,
CASHDISCOUNT1PERCENT TYPE STRING,
DOCUMENTHEADERTEXT TYPE STRING,
INVOICEGROSSAMOUNT TYPE STRING,
SUPPLIERINVOICESTATUS TYPE STRING,
PAYMENTBLOCKINGREASON TYPE STRING,
MANUALCASHDISCOUNT TYPE STRING,
PAYMENTMETHOD TYPE STRING,
PAYMENTREFERENCE TYPE STRING,
INVOICEREFERENCE TYPE STRING,
INVOICEREFERENCEFISCALYEAR TYPE STRING,
PAYMENTTERMS TYPE STRING,
CASHDISCOUNT2DAYS TYPE STRING,
CASHDISCOUNT2PERCENT TYPE STRING,
NETPAYMENTDAYS TYPE STRING,
FIXEDCASHDISCOUNT TYPE STRING,
UNPLANNEDDELIVERYCOST TYPE STRING,
UNPLANNEDDELIVERYCOSTTAXCODE TYPE STRING,
UNPLNDDELIVCOSTTAXJURISDICTION TYPE STRING,
ASSIGNMENTREFERENCE TYPE STRING,
SUPPLIERPOSTINGLINEITEMTEXT TYPE STRING,
PAYTSLIPWTHREFSUBSCRIBER TYPE STRING,
PAYTSLIPWTHREFCHECKDIGIT TYPE STRING,
BUSINESSPLACE TYPE STRING,
PAYTSLIPWTHREFREFERENCE TYPE STRING,
BUSINESSNETWORKORIGIN TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
INVOICESTATUSANDORIGIN TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
ISDOUBLEINVOICE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IAPISINVOICE_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_IAPISINVOICE_STR-MANDT sy-vline 
WA_IAPISINVOICE_STR-SUPPLIERINVOICEUPLOADUUID sy-vline 
WA_IAPISINVOICE_STR-ROOTDRAFTKEY sy-vline 
WA_IAPISINVOICE_STR-CREATIONDATE sy-vline 
WA_IAPISINVOICE_STR-SUPPLIERINVOICEUPLOADSTATUS sy-vline 
WA_IAPISINVOICE_STR-SUPPLIERINVOICE sy-vline 
WA_IAPISINVOICE_STR-FISCALYEAR sy-vline 
WA_IAPISINVOICE_STR-INVOICINGPARTY sy-vline 
WA_IAPISINVOICE_STR-DOCUMENTDATE sy-vline 
WA_IAPISINVOICE_STR-POSTINGDATE sy-vline 
WA_IAPISINVOICE_STR-DOCUMENTCURRENCY sy-vline 
WA_IAPISINVOICE_STR-SUPPLIERINVOICEORIGIN sy-vline 
WA_IAPISINVOICE_STR-CREATEDBYUSER sy-vline 
WA_IAPISINVOICE_STR-SUPPLIERINVOICEIDBYINVCGPARTY sy-vline 
WA_IAPISINVOICE_STR-COMPANYCODE sy-vline 
WA_IAPISINVOICE_STR-DUECALCULATIONBASEDATE sy-vline 
WA_IAPISINVOICE_STR-CASHDISCOUNT1DAYS sy-vline 
WA_IAPISINVOICE_STR-CASHDISCOUNT1PERCENT sy-vline 
WA_IAPISINVOICE_STR-DOCUMENTHEADERTEXT sy-vline 
WA_IAPISINVOICE_STR-INVOICEGROSSAMOUNT sy-vline 
WA_IAPISINVOICE_STR-SUPPLIERINVOICESTATUS sy-vline 
WA_IAPISINVOICE_STR-PAYMENTBLOCKINGREASON sy-vline 
WA_IAPISINVOICE_STR-MANUALCASHDISCOUNT sy-vline 
WA_IAPISINVOICE_STR-PAYMENTMETHOD sy-vline 
WA_IAPISINVOICE_STR-PAYMENTREFERENCE sy-vline 
WA_IAPISINVOICE_STR-INVOICEREFERENCE sy-vline 
WA_IAPISINVOICE_STR-INVOICEREFERENCEFISCALYEAR sy-vline 
WA_IAPISINVOICE_STR-PAYMENTTERMS sy-vline 
WA_IAPISINVOICE_STR-CASHDISCOUNT2DAYS sy-vline 
WA_IAPISINVOICE_STR-CASHDISCOUNT2PERCENT sy-vline 
WA_IAPISINVOICE_STR-NETPAYMENTDAYS sy-vline 
WA_IAPISINVOICE_STR-FIXEDCASHDISCOUNT sy-vline 
WA_IAPISINVOICE_STR-UNPLANNEDDELIVERYCOST sy-vline 
WA_IAPISINVOICE_STR-UNPLANNEDDELIVERYCOSTTAXCODE sy-vline 
WA_IAPISINVOICE_STR-UNPLNDDELIVCOSTTAXJURISDICTION sy-vline 
WA_IAPISINVOICE_STR-ASSIGNMENTREFERENCE sy-vline 
WA_IAPISINVOICE_STR-SUPPLIERPOSTINGLINEITEMTEXT sy-vline 
WA_IAPISINVOICE_STR-PAYTSLIPWTHREFSUBSCRIBER sy-vline 
WA_IAPISINVOICE_STR-PAYTSLIPWTHREFCHECKDIGIT sy-vline 
WA_IAPISINVOICE_STR-BUSINESSPLACE sy-vline 
WA_IAPISINVOICE_STR-PAYTSLIPWTHREFREFERENCE sy-vline 
WA_IAPISINVOICE_STR-BUSINESSNETWORKORIGIN sy-vline 
WA_IAPISINVOICE_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_IAPISINVOICE_STR-INVOICESTATUSANDORIGIN sy-vline 
WA_IAPISINVOICE_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_IAPISINVOICE_STR-ISDOUBLEINVOICE sy-vline      INTO ld_text SEPARATED BY SPACE.

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