ABAP Select data from SAP table IPVACCTGDOCHDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IPVACCTGDOCHDR
*  INTO TABLE @DATA(IT_IPVACCTGDOCHDR2).
*--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_IPVACCTGDOCHDR INDEX 1 INTO DATA(WA_IPVACCTGDOCHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IPVACCTGDOCHDR>-MANDT = 1.
<IPVACCTGDOCHDR>-COMPANYCODE = 1.
<IPVACCTGDOCHDR>-FISCALPERIOD = 1.
<IPVACCTGDOCHDR>-ACCOUNTINGDOCUMENT = 1.
<IPVACCTGDOCHDR>-DOCUMENTDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IPVACCTGDOCHDR-ORIGIN, sy-vline,
  WA_IPVACCTGDOCHDR-ACCOUNTINGDOCUMENTTYPE, sy-vline,
  WA_IPVACCTGDOCHDR-ORIGINREFERENCEDOCUMENT, sy-vline,
  WA_IPVACCTGDOCHDR-ACCOUNTINGDOCUMENTSTATUS, sy-vline,
  WA_IPVACCTGDOCHDR-ACCOUNTINGDOCUMENTISREVERSED, sy-vline,
  WA_IPVACCTGDOCHDR-ACCOUNTINGDOCUMENTCROSSCOREF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IPVACCTGDOCHDR 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_IPVACCTGDOCHDR 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_IPVACCTGDOCHDR INTO WA_IPVACCTGDOCHDR.


*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_IPVACCTGDOCHDR-ACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPVACCTGDOCHDR-ACCOUNTINGDOCUMENT.
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_IPVACCTGDOCHDR_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
FISCALPERIOD TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
DOCUMENTDESCRIPTION TYPE STRING,
ORIGIN TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
ORIGINREFERENCEDOCUMENT TYPE STRING,
ACCOUNTINGDOCUMENTSTATUS TYPE STRING,
ACCOUNTINGDOCUMENTISREVERSED TYPE STRING,
ACCOUNTINGDOCUMENTCROSSCOREF TYPE STRING,
POSTINGDATE TYPE STRING,
DOCUMENTDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
CHANGEDDATETIME TYPE STRING,
NUMBEROFITEMS TYPE STRING,
NUMBEROFREJECTEDITEMS TYPE STRING,
NUMBEROFDOCUMENTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IPVACCTGDOCHDR_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_IPVACCTGDOCHDR_STR-MANDT sy-vline 
WA_IPVACCTGDOCHDR_STR-COMPANYCODE sy-vline 
WA_IPVACCTGDOCHDR_STR-FISCALPERIOD sy-vline 
WA_IPVACCTGDOCHDR_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_IPVACCTGDOCHDR_STR-DOCUMENTDESCRIPTION sy-vline 
WA_IPVACCTGDOCHDR_STR-ORIGIN sy-vline 
WA_IPVACCTGDOCHDR_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_IPVACCTGDOCHDR_STR-ORIGINREFERENCEDOCUMENT sy-vline 
WA_IPVACCTGDOCHDR_STR-ACCOUNTINGDOCUMENTSTATUS sy-vline 
WA_IPVACCTGDOCHDR_STR-ACCOUNTINGDOCUMENTISREVERSED sy-vline 
WA_IPVACCTGDOCHDR_STR-ACCOUNTINGDOCUMENTCROSSCOREF sy-vline 
WA_IPVACCTGDOCHDR_STR-POSTINGDATE sy-vline 
WA_IPVACCTGDOCHDR_STR-DOCUMENTDATE sy-vline 
WA_IPVACCTGDOCHDR_STR-CREATEDBYUSER sy-vline 
WA_IPVACCTGDOCHDR_STR-CREATIONDATETIME sy-vline 
WA_IPVACCTGDOCHDR_STR-LASTCHANGEDBYUSER sy-vline 
WA_IPVACCTGDOCHDR_STR-CHANGEDDATETIME sy-vline 
WA_IPVACCTGDOCHDR_STR-NUMBEROFITEMS sy-vline 
WA_IPVACCTGDOCHDR_STR-NUMBEROFREJECTEDITEMS sy-vline 
WA_IPVACCTGDOCHDR_STR-NUMBEROFDOCUMENTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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