ABAP Select data from SAP table ICAINVBILL_PY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICAINVBILL_PY
*  INTO TABLE @DATA(IT_ICAINVBILL_PY2).
*--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_ICAINVBILL_PY INDEX 1 INTO DATA(WA_ICAINVBILL_PY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICAINVBILL_PY>-MANDT = 1.
<ICAINVBILL_PY>-CABILLGDOCUMENT = 1.
<ICAINVBILL_PY>-CABILLGDOCPAYMENTITEM = 1.
<ICAINVBILL_PY>-CABILLGGRPGOFPAYMENTDATA = 1.
<ICAINVBILL_PY>-CABILLGPAYMENTREFERENCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICAINVBILL_PY-CABILLGPAYMENTAMOUNT, sy-vline,
  WA_ICAINVBILL_PY-TRANSACTIONCURRENCY, sy-vline,
  WA_ICAINVBILL_PY-CABILLGDOCPAYTITMEXTSYST, sy-vline,
  WA_ICAINVBILL_PY-CAINVCGDOCITEMISREVERSAL, sy-vline,
  WA_ICAINVBILL_PY-CAPAYMENTMETHOD, sy-vline,
  WA_ICAINVBILL_PY-CABANKOFALTVBPFORPAYMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICAINVBILL_PY 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_ICAINVBILL_PY 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_ICAINVBILL_PY INTO WA_ICAINVBILL_PY.


*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 CAALTVBPFORPAYMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICAINVBILL_PY-CAALTVBPFORPAYMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICAINVBILL_PY-CAALTVBPFORPAYMENT.
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_ICAINVBILL_PY_STR, 
MANDT TYPE STRING,
CABILLGDOCUMENT TYPE STRING,
CABILLGDOCPAYMENTITEM TYPE STRING,
CABILLGGRPGOFPAYMENTDATA TYPE STRING,
CABILLGPAYMENTREFERENCE TYPE STRING,
CABILLGPAYMENTAMOUNT TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CABILLGDOCPAYTITMEXTSYST TYPE STRING,
CAINVCGDOCITEMISREVERSAL TYPE STRING,
CAPAYMENTMETHOD TYPE STRING,
CABANKOFALTVBPFORPAYMENT TYPE STRING,
CAALTVBPFORPAYMENT TYPE STRING,
CAKEYFORPAYMENTCARDSUPPLEMENT TYPE STRING,
CAPAYMENTBILLINGSTATUS TYPE STRING,
CABILLGDOCPAYMENTITEMPRIORITY TYPE STRING,
CABILLGGROUPINGSOURCEITEMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICAINVBILL_PY_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_ICAINVBILL_PY_STR-MANDT sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGDOCUMENT sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGDOCPAYMENTITEM sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGGRPGOFPAYMENTDATA sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGPAYMENTREFERENCE sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGPAYMENTAMOUNT sy-vline 
WA_ICAINVBILL_PY_STR-TRANSACTIONCURRENCY sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGDOCPAYTITMEXTSYST sy-vline 
WA_ICAINVBILL_PY_STR-CAINVCGDOCITEMISREVERSAL sy-vline 
WA_ICAINVBILL_PY_STR-CAPAYMENTMETHOD sy-vline 
WA_ICAINVBILL_PY_STR-CABANKOFALTVBPFORPAYMENT sy-vline 
WA_ICAINVBILL_PY_STR-CAALTVBPFORPAYMENT sy-vline 
WA_ICAINVBILL_PY_STR-CAKEYFORPAYMENTCARDSUPPLEMENT sy-vline 
WA_ICAINVBILL_PY_STR-CAPAYMENTBILLINGSTATUS sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGDOCPAYMENTITEMPRIORITY sy-vline 
WA_ICAINVBILL_PY_STR-CABILLGGROUPINGSOURCEITEMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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