ABAP Select data from SAP table ISCABILLGREQDOCHEADERTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISCABILLGREQDOCHEADERTP
*  INTO TABLE @DATA(IT_ISCABILLGREQDOCHEADERTP2).
*--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_ISCABILLGREQDOCHEADERTP INDEX 1 INTO DATA(WA_ISCABILLGREQDOCHEADERTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISCABILLGREQDOCHEADERTP>-KEY = 1.
<ISCABILLGREQDOCHEADERTP>-PARENT_KEY = 1.
<ISCABILLGREQDOCHEADERTP>-ROOT_KEY = 1.
<ISCABILLGREQDOCHEADERTP>-CABILLGREQDOCUMENT = 1.
<ISCABILLGREQDOCHEADERTP>-CABILLGREQCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISCABILLGREQDOCHEADERTP-CABILLGREQTYPE, sy-vline,
  WA_ISCABILLGREQDOCHEADERTP-CABILLGREQREASON, sy-vline,
  WA_ISCABILLGREQDOCHEADERTP-CAAPPLICATIONAREA, sy-vline,
  WA_ISCABILLGREQDOCHEADERTP-CONTRACTACCOUNT, sy-vline,
  WA_ISCABILLGREQDOCHEADERTP-BUSINESSPARTNER, sy-vline,
  WA_ISCABILLGREQDOCHEADERTP-CAINVOICINGDOCUMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISCABILLGREQDOCHEADERTP 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_ISCABILLGREQDOCHEADERTP 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_ISCABILLGREQDOCHEADERTP INTO WA_ISCABILLGREQDOCHEADERTP.


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

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISCABILLGREQDOCHEADERTP-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISCABILLGREQDOCHEADERTP-BUSINESSPARTNER.
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_ISCABILLGREQDOCHEADERTP_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
CABILLGREQDOCUMENT TYPE STRING,
CABILLGREQCATEGORY TYPE STRING,
CABILLGREQTYPE TYPE STRING,
CABILLGREQREASON TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CAINVOICINGDOCUMENT TYPE STRING,
CABILLGREQDESCRIPTION TYPE STRING,
CABILLGREQSTATUS TYPE STRING,
CABILLGREQTOTALAMOUNT TYPE STRING,
CABILLGREQTOTALAMOUNTCURRENCY TYPE STRING,
CABILLGREQCREATIONUSER TYPE STRING,
CABILLGREQCREATIONDATE TYPE STRING,
CABILLGREQCREATIONTIME TYPE STRING,
CABILLGREQCHANGEUSER TYPE STRING,
CABILLGREQCHANGEDATE TYPE STRING,
CABILLGREQCHANGETIME TYPE STRING,
CACLRFCTNEXIST TYPE STRING,
CABILLGREQREFERENCE TYPE STRING,
CABILLGREQREASONTEXT TYPE STRING,
CABILLGREQSTATUSTEXT TYPE STRING,
CABILLGREQCATEGORYTEXT TYPE STRING,
CABILLGREQTYPETEXT TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
ISACTIVEENTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISCABILLGREQDOCHEADERTP_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_ISCABILLGREQDOCHEADERTP_STR-KEY sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-PARENT_KEY sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-ROOT_KEY sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQDOCUMENT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCATEGORY sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQTYPE sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQREASON sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CAAPPLICATIONAREA sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CONTRACTACCOUNT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-BUSINESSPARTNER sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CAINVOICINGDOCUMENT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQDESCRIPTION sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQSTATUS sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQTOTALAMOUNT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQTOTALAMOUNTCURRENCY sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCREATIONUSER sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCREATIONDATE sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCREATIONTIME sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCHANGEUSER sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCHANGEDATE sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCHANGETIME sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CACLRFCTNEXIST sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQREFERENCE sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQREASONTEXT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQSTATUSTEXT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQCATEGORYTEXT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-CABILLGREQTYPETEXT sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-HASACTIVEENTITY sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_ISCABILLGREQDOCHEADERTP_STR-ISACTIVEENTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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