ABAP Select data from SAP table EDOC_IN_IS_ITCREV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDOC_IN_IS_ITCREV
*  INTO TABLE @DATA(IT_EDOC_IN_IS_ITCREV2).
*--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_EDOC_IN_IS_ITCREV INDEX 1 INTO DATA(WA_EDOC_IN_IS_ITCREV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDOC_IN_IS_ITCREV>-FLAG = 1.
<EDOC_IN_IS_ITCREV>-GSTIN = 1.
<EDOC_IN_IS_ITCREV>-FP = 1.
<EDOC_IN_IS_ITCREV>-DOCNUM = 1.
<EDOC_IN_IS_ITCREV>-RULETYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDOC_IN_IS_ITCREV-SUPPGSTIN, sy-vline,
  WA_EDOC_IN_IS_ITCREV-CNAME, sy-vline,
  WA_EDOC_IN_IS_ITCREV-INTERNALINVNUM, sy-vline,
  WA_EDOC_IN_IS_ITCREV-ITEMS, sy-vline,
  WA_EDOC_IN_IS_ITCREV-EXTENSION, sy-vline,
  WA_EDOC_IN_IS_ITCREV-DIFFPERCENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EDOC_IN_IS_ITCREV 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_EDOC_IN_IS_ITCREV 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_EDOC_IN_IS_ITCREV INTO WA_EDOC_IN_IS_ITCREV.


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

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

*Conversion exit ALPHA, internal->external for field GLHEADER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EDOC_IN_IS_ITCREV-GLHEADER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDOC_IN_IS_ITCREV-GLHEADER.
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_EDOC_IN_IS_ITCREV_STR, 
FLAG TYPE STRING,
GSTIN TYPE STRING,
FP TYPE STRING,
DOCNUM TYPE STRING,
RULETYPE TYPE STRING,
SUPPGSTIN TYPE STRING,
CNAME TYPE STRING,
INTERNALINVNUM TYPE STRING,
ITEMS TYPE STRING,
EXTENSION TYPE STRING,
DIFFPERCENT TYPE STRING,
ACCDOCNUM TYPE STRING,
POSTINGDATE TYPE STRING,
BUSINESSDIV TYPE STRING,
VENDORCODE TYPE STRING,
EWAYBILLNUM TYPE STRING,
EWAYBILLGENDATE TYPE STRING,
EWAYBILLVALIDITYDATE TYPE STRING,
VENDORREGION TYPE STRING,
GLHEADER TYPE STRING,
TRANSACTIONTYPE TYPE STRING,
COMPANYCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDOC_IN_IS_ITCREV_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_EDOC_IN_IS_ITCREV_STR-FLAG sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-GSTIN sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-FP sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-DOCNUM sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-RULETYPE sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-SUPPGSTIN sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-CNAME sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-INTERNALINVNUM sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-ITEMS sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-EXTENSION sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-DIFFPERCENT sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-ACCDOCNUM sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-POSTINGDATE sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-BUSINESSDIV sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-VENDORCODE sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-EWAYBILLNUM sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-EWAYBILLGENDATE sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-EWAYBILLVALIDITYDATE sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-VENDORREGION sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-GLHEADER sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-TRANSACTIONTYPE sy-vline 
WA_EDOC_IN_IS_ITCREV_STR-COMPANYCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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