ABAP Select data from SAP table GTCN_S_VERIF_DOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GTCN_S_VERIF_DOC
*  INTO TABLE @DATA(IT_GTCN_S_VERIF_DOC2).
*--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_GTCN_S_VERIF_DOC INDEX 1 INTO DATA(WA_GTCN_S_VERIF_DOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GTCN_S_VERIF_DOC>-MANDT = 1.
<GTCN_S_VERIF_DOC>-VERIF_DOC_ID = 1.
<GTCN_S_VERIF_DOC>-VERIF_LOT_ID = 1.
<GTCN_S_VERIF_DOC>-SYSTEM_STATUS = 1.
<GTCN_S_VERIF_DOC>-USER_STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GTCN_S_VERIF_DOC-COMPANY_EXP_ID, sy-vline,
  WA_GTCN_S_VERIF_DOC-PAYMENT_METHOD, sy-vline,
  WA_GTCN_S_VERIF_DOC-EST_PAYMENT_DATE, sy-vline,
  WA_GTCN_S_VERIF_DOC-CREATED_ON, sy-vline,
  WA_GTCN_S_VERIF_DOC-CREATED_BY, sy-vline,
  WA_GTCN_S_VERIF_DOC-CHANGED_ON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GTCN_S_VERIF_DOC 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_GTCN_S_VERIF_DOC 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_GTCN_S_VERIF_DOC INTO WA_GTCN_S_VERIF_DOC.


*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 VERIF_DOC_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GTCN_S_VERIF_DOC-VERIF_DOC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GTCN_S_VERIF_DOC-VERIF_DOC_ID.
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_GTCN_S_VERIF_DOC_STR, 
MANDT TYPE STRING,
VERIF_DOC_ID TYPE STRING,
VERIF_LOT_ID TYPE STRING,
SYSTEM_STATUS TYPE STRING,
USER_STATUS TYPE STRING,
COMPANY_EXP_ID TYPE STRING,
PAYMENT_METHOD TYPE STRING,
EST_PAYMENT_DATE TYPE STRING,
CREATED_ON TYPE STRING,
CREATED_BY TYPE STRING,
CHANGED_ON TYPE STRING,
CHANGED_BY TYPE STRING,
PROCESSED_BY TYPE STRING,
ASSIGNED_ON TYPE STRING,
ASSIGNED_BY TYPE STRING,
ASSIGNED_BEHALF TYPE STRING,
COMPL_CUST_DECL_ON TYPE STRING,
COMPL_CUST_DECL_BY TYPE STRING,
CUST_DECL_YEAR TYPE STRING,
CUST_DECL_DOC_NO TYPE STRING,
CUST_DECL_REG_NO TYPE STRING,
WRITE_OFF_DUE TYPE STRING,
COMPL_WRITE_OFF_ON TYPE STRING,
COMPL_WRITE_OFF_BY TYPE STRING,
OTHER_REGIST_ON TYPE STRING,
TAX_REFUND_DUE TYPE STRING,
COMPL_REFUND_ON TYPE STRING,
COMPL_REFUND_BY TYPE STRING,
CLOSED_ON TYPE STRING,
CLOSED_BY TYPE STRING,
VOID_ON TYPE STRING,
VOID_BY TYPE STRING,
VOID_REASON_CODE TYPE STRING,
VOID_MEMO TYPE STRING,
TRANSLATION_DATE TYPE STRING,
PLANNED_RETURN_DATE TYPE STRING,
ADDITIONAL_DATA1 TYPE STRING,
ADDITIONAL_DATA2 TYPE STRING,
ADDITIONAL_DATA3 TYPE STRING,
ADDITIONAL_DATA4 TYPE STRING,
ADDITIONAL_DATA5 TYPE STRING,
ADDITIONAL_DATA6 TYPE STRING,
ADDITIONAL_DATA7 TYPE STRING,
ADDITIONAL_DATA8 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GTCN_S_VERIF_DOC_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_GTCN_S_VERIF_DOC_STR-MANDT sy-vline 
WA_GTCN_S_VERIF_DOC_STR-VERIF_DOC_ID sy-vline 
WA_GTCN_S_VERIF_DOC_STR-VERIF_LOT_ID sy-vline 
WA_GTCN_S_VERIF_DOC_STR-SYSTEM_STATUS sy-vline 
WA_GTCN_S_VERIF_DOC_STR-USER_STATUS sy-vline 
WA_GTCN_S_VERIF_DOC_STR-COMPANY_EXP_ID sy-vline 
WA_GTCN_S_VERIF_DOC_STR-PAYMENT_METHOD sy-vline 
WA_GTCN_S_VERIF_DOC_STR-EST_PAYMENT_DATE sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CREATED_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CREATED_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CHANGED_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CHANGED_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-PROCESSED_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ASSIGNED_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ASSIGNED_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ASSIGNED_BEHALF sy-vline 
WA_GTCN_S_VERIF_DOC_STR-COMPL_CUST_DECL_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-COMPL_CUST_DECL_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CUST_DECL_YEAR sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CUST_DECL_DOC_NO sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CUST_DECL_REG_NO sy-vline 
WA_GTCN_S_VERIF_DOC_STR-WRITE_OFF_DUE sy-vline 
WA_GTCN_S_VERIF_DOC_STR-COMPL_WRITE_OFF_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-COMPL_WRITE_OFF_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-OTHER_REGIST_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-TAX_REFUND_DUE sy-vline 
WA_GTCN_S_VERIF_DOC_STR-COMPL_REFUND_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-COMPL_REFUND_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CLOSED_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-CLOSED_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-VOID_ON sy-vline 
WA_GTCN_S_VERIF_DOC_STR-VOID_BY sy-vline 
WA_GTCN_S_VERIF_DOC_STR-VOID_REASON_CODE sy-vline 
WA_GTCN_S_VERIF_DOC_STR-VOID_MEMO sy-vline 
WA_GTCN_S_VERIF_DOC_STR-TRANSLATION_DATE sy-vline 
WA_GTCN_S_VERIF_DOC_STR-PLANNED_RETURN_DATE sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA1 sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA2 sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA3 sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA4 sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA5 sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA6 sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA7 sy-vline 
WA_GTCN_S_VERIF_DOC_STR-ADDITIONAL_DATA8 sy-vline      INTO ld_text SEPARATED BY SPACE.

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