ABAP Select data from SAP table GST_IN_ACCOUNTING_DOCUMENT_ITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GST_IN_ACCOUNTING_DOCUMENT_ITM
*  INTO TABLE @DATA(IT_GST_IN_ACCOUNTING_DOCUMENT_ITM2).
*--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_GST_IN_ACCOUNTING_DOCUMENT_ITM INDEX 1 INTO DATA(WA_GST_IN_ACCOUNTING_DOCUMENT_ITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GST_IN_ACCOUNTING_DOCUMENT_ITM>-COMPANYCODE = 1.
<GST_IN_ACCOUNTING_DOCUMENT_ITM>-ACCOUNTINGDOCUMENT = 1.
<GST_IN_ACCOUNTING_DOCUMENT_ITM>-FISCALYEAR = 1.
<GST_IN_ACCOUNTING_DOCUMENT_ITM>-ACCOUNTINGDOCUMENTITEM = 1.
<GST_IN_ACCOUNTING_DOCUMENT_ITM>-ACCOUNTINGDOCUMENTITEMTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-CLEARINGDATE, sy-vline,
  WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-CLEARINGCREATIONDATE, sy-vline,
  WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-CLEARINGACCOUNTINGDOCUMENT, sy-vline,
  WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-POSTINGKEY, sy-vline,
  WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-FINANCIALACCOUNTTYPE, sy-vline,
  WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-SPECIALGLCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GST_IN_ACCOUNTING_DOCUMENT_ITM 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_GST_IN_ACCOUNTING_DOCUMENT_ITM 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_GST_IN_ACCOUNTING_DOCUMENT_ITM INTO WA_GST_IN_ACCOUNTING_DOCUMENT_ITM.


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

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-FISCALYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field IN_GSTPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-IN_GSTPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GST_IN_ACCOUNTING_DOCUMENT_ITM-IN_GSTPARTNER.
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_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR, 
COMPANYCODE TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
FISCALYEAR TYPE STRING,
ACCOUNTINGDOCUMENTITEM TYPE STRING,
ACCOUNTINGDOCUMENTITEMTYPE TYPE STRING,
CLEARINGDATE TYPE STRING,
CLEARINGCREATIONDATE TYPE STRING,
CLEARINGACCOUNTINGDOCUMENT TYPE STRING,
POSTINGKEY TYPE STRING,
FINANCIALACCOUNTTYPE TYPE STRING,
SPECIALGLCODE TYPE STRING,
SPECIALGLTRANSACTIONTYPE TYPE STRING,
DEBITCREDITCODE TYPE STRING,
BUSINESSAREA TYPE STRING,
TAXCODE TYPE STRING,
WITHHOLDINGTAXCODE TYPE STRING,
AMOUNTINCOMPANYCODECURRENCY TYPE STRING,
AMOUNTINTRANSACTIONCURRENCY TYPE STRING,
TAXBASEAMOUNTINCOCODECRCY TYPE STRING,
TAXBASEAMOUNTINTRANSCRCY TYPE STRING,
TAXITEMGROUP TYPE STRING,
TRANSACTIONTYPEDETERMINATION TYPE STRING,
COSTCENTER TYPE STRING,
BILLINGDOCUMENT TYPE STRING,
SALESORDER TYPE STRING,
SALESORDERITEM TYPE STRING,
GLACCOUNT TYPE STRING,
MATERIAL TYPE STRING,
PROFITCENTER TYPE STRING,
BUSINESSPLACE TYPE STRING,
IN_HSNORSACCODE TYPE STRING,
IN_GSTPARTNER TYPE STRING,
IN_GSTPLACEOFSUPPLY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_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_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-COMPANYCODE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-FISCALYEAR sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-ACCOUNTINGDOCUMENTITEM sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-ACCOUNTINGDOCUMENTITEMTYPE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-CLEARINGDATE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-CLEARINGCREATIONDATE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-CLEARINGACCOUNTINGDOCUMENT sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-POSTINGKEY sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-FINANCIALACCOUNTTYPE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-SPECIALGLCODE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-SPECIALGLTRANSACTIONTYPE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-DEBITCREDITCODE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-BUSINESSAREA sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-TAXCODE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-WITHHOLDINGTAXCODE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-AMOUNTINCOMPANYCODECURRENCY sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-AMOUNTINTRANSACTIONCURRENCY sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-TAXBASEAMOUNTINCOCODECRCY sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-TAXBASEAMOUNTINTRANSCRCY sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-TAXITEMGROUP sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-TRANSACTIONTYPEDETERMINATION sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-COSTCENTER sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-BILLINGDOCUMENT sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-SALESORDER sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-SALESORDERITEM sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-GLACCOUNT sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-MATERIAL sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-PROFITCENTER sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-BUSINESSPLACE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-IN_HSNORSACCODE sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-IN_GSTPARTNER sy-vline 
WA_GST_IN_ACCOUNTING_DOCUMENT_ITM_STR-IN_GSTPLACEOFSUPPLY sy-vline      INTO ld_text SEPARATED BY SPACE.

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