ABAP Select data from SAP table IDOCTOWFINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDOCTOWFINFO
*  INTO TABLE @DATA(IT_IDOCTOWFINFO2).
*--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_IDOCTOWFINFO INDEX 1 INTO DATA(WA_IDOCTOWFINFO2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDOCTOWFINFO-REFERENCEDOCUMENT, sy-vline,
  WA_IDOCTOWFINFO-DOCUMENTDATE, sy-vline,
  WA_IDOCTOWFINFO-FISCALPERIOD, sy-vline,
  WA_IDOCTOWFINFO-LASTCHANGEDATE, sy-vline,
  WA_IDOCTOWFINFO-LEDGERGROUP, sy-vline,
  WA_IDOCTOWFINFO-HEADERDESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDOCTOWFINFO 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_IDOCTOWFINFO 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_IDOCTOWFINFO INTO WA_IDOCTOWFINFO.


*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_IDOCTOWFINFO-ACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDOCTOWFINFO-ACCOUNTINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IDOCTOWFINFO-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDOCTOWFINFO-FISCALYEAR.
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_IDOCTOWFINFO_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
FISCALYEAR TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
REFERENCEDOCUMENT TYPE STRING,
DOCUMENTDATE TYPE STRING,
FISCALPERIOD TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LEDGERGROUP TYPE STRING,
HEADERDESCRIPTION TYPE STRING,
POSTINGDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
ACCOUNTINGDOCUMENTCREATIONDATE TYPE STRING,
OBJECTKEY TYPE STRING,
TRANSACTIONCODE TYPE STRING,
PARKINGTRANSACTIONCODE TYPE STRING,
CURRENCY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
GLOBALCURRENCY TYPE STRING,
FREEDEFINEDCURRENCY1 TYPE STRING,
ACCOUNTINGDOCUMENTCATEGORY TYPE STRING,
ACCOUNTINGDOCUMENTSTATUS TYPE STRING,
JOURNALENTRYWORKFLOWSTATUS TYPE STRING,
WORKFLOW TYPE STRING,
WORKFLOWTASKINTERNALID TYPE STRING,
RELEASEDATETIME TYPE STRING,
WORKITEM TYPE STRING,
WORKFLOWTASKDEFINITION TYPE STRING,
TASKPROCESSINGSTATUS TYPE STRING,
REVERSALREASON TYPE STRING,
PLANNEDREVERSALDATE TYPE STRING,
WORKFLOWTASKTYPE TYPE STRING,
WORKFLOWTASKPRIORITY TYPE STRING,
WORKFLOWTASKSTATUS TYPE STRING,
PARKEDBYUSER TYPE STRING,
BATCH TYPE STRING,
INTERCOMPANYTRANSACTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDOCTOWFINFO_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_IDOCTOWFINFO_STR-MANDT sy-vline 
WA_IDOCTOWFINFO_STR-COMPANYCODE sy-vline 
WA_IDOCTOWFINFO_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_IDOCTOWFINFO_STR-FISCALYEAR sy-vline 
WA_IDOCTOWFINFO_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_IDOCTOWFINFO_STR-REFERENCEDOCUMENT sy-vline 
WA_IDOCTOWFINFO_STR-DOCUMENTDATE sy-vline 
WA_IDOCTOWFINFO_STR-FISCALPERIOD sy-vline 
WA_IDOCTOWFINFO_STR-LASTCHANGEDATE sy-vline 
WA_IDOCTOWFINFO_STR-LEDGERGROUP sy-vline 
WA_IDOCTOWFINFO_STR-HEADERDESCRIPTION sy-vline 
WA_IDOCTOWFINFO_STR-POSTINGDATE sy-vline 
WA_IDOCTOWFINFO_STR-CREATEDBYUSER sy-vline 
WA_IDOCTOWFINFO_STR-CREATIONDATETIME sy-vline 
WA_IDOCTOWFINFO_STR-ACCOUNTINGDOCUMENTCREATIONDATE sy-vline 
WA_IDOCTOWFINFO_STR-OBJECTKEY sy-vline 
WA_IDOCTOWFINFO_STR-TRANSACTIONCODE sy-vline 
WA_IDOCTOWFINFO_STR-PARKINGTRANSACTIONCODE sy-vline 
WA_IDOCTOWFINFO_STR-CURRENCY sy-vline 
WA_IDOCTOWFINFO_STR-COMPANYCODECURRENCY sy-vline 
WA_IDOCTOWFINFO_STR-GLOBALCURRENCY sy-vline 
WA_IDOCTOWFINFO_STR-FREEDEFINEDCURRENCY1 sy-vline 
WA_IDOCTOWFINFO_STR-ACCOUNTINGDOCUMENTCATEGORY sy-vline 
WA_IDOCTOWFINFO_STR-ACCOUNTINGDOCUMENTSTATUS sy-vline 
WA_IDOCTOWFINFO_STR-JOURNALENTRYWORKFLOWSTATUS sy-vline 
WA_IDOCTOWFINFO_STR-WORKFLOW sy-vline 
WA_IDOCTOWFINFO_STR-WORKFLOWTASKINTERNALID sy-vline 
WA_IDOCTOWFINFO_STR-RELEASEDATETIME sy-vline 
WA_IDOCTOWFINFO_STR-WORKITEM sy-vline 
WA_IDOCTOWFINFO_STR-WORKFLOWTASKDEFINITION sy-vline 
WA_IDOCTOWFINFO_STR-TASKPROCESSINGSTATUS sy-vline 
WA_IDOCTOWFINFO_STR-REVERSALREASON sy-vline 
WA_IDOCTOWFINFO_STR-PLANNEDREVERSALDATE sy-vline 
WA_IDOCTOWFINFO_STR-WORKFLOWTASKTYPE sy-vline 
WA_IDOCTOWFINFO_STR-WORKFLOWTASKPRIORITY sy-vline 
WA_IDOCTOWFINFO_STR-WORKFLOWTASKSTATUS sy-vline 
WA_IDOCTOWFINFO_STR-PARKEDBYUSER sy-vline 
WA_IDOCTOWFINFO_STR-BATCH sy-vline 
WA_IDOCTOWFINFO_STR-INTERCOMPANYTRANSACTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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