ABAP Select data from SAP table IDGT_S_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDGT_S_HEADER
*  INTO TABLE @DATA(IT_IDGT_S_HEADER2).
*--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_IDGT_S_HEADER INDEX 1 INTO DATA(WA_IDGT_S_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDGT_S_HEADER>-VBELN = 1.
<IDGT_S_HEADER>-COMBINEID = 1.
<IDGT_S_HEADER>-SENTDATE = 1.
<IDGT_S_HEADER>-USERNAME = 1.
<IDGT_S_HEADER>-VBTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDGT_S_HEADER-KUNNR, sy-vline,
  WA_IDGT_S_HEADER-VKORG, sy-vline,
  WA_IDGT_S_HEADER-VTWEG, sy-vline,
  WA_IDGT_S_HEADER-SPART, sy-vline,
  WA_IDGT_S_HEADER-BUKRS, sy-vline,
  WA_IDGT_S_HEADER-CTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDGT_S_HEADER 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_IDGT_S_HEADER 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_IDGT_S_HEADER INTO WA_IDGT_S_HEADER.


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

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

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

*Conversion exit EXCRT, internal->external for field KURRF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_IDGT_S_HEADER-KURRF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDGT_S_HEADER-KURRF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDGT_S_HEADER-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDGT_S_HEADER-KUNAG.
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_IDGT_S_HEADER_STR, 
VBELN TYPE STRING,
COMBINEID TYPE STRING,
SENTDATE TYPE STRING,
USERNAME TYPE STRING,
VBTYP TYPE STRING,
KUNNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
BUKRS TYPE STRING,
CTYPE TYPE STRING,
KNAME1 TYPE STRING,
KSTCD5 TYPE STRING,
KSTRAS TYPE STRING,
KBANKA TYPE STRING,
VUSNAM TYPE STRING,
CUSNAM TYPE STRING,
VBANKA TYPE STRING,
VSTRAS TYPE STRING,
VSTCD1 TYPE STRING,
NETWR_DOC TYPE STRING,
CURRENCY TYPE STRING,
NOTE TYPE STRING,
POS_VBELN TYPE STRING,
SENT_FLAG TYPE STRING,
KURRF TYPE STRING,
FWBTR TYPE STRING,
FWAER TYPE STRING,
KUNAG TYPE STRING,
NOTE2 TYPE STRING,
DOC_DATE TYPE STRING,
DOC_TIME TYPE STRING,
GTKEY1 TYPE STRING,
GTKEY2 TYPE STRING,
GTKEY3 TYPE STRING,
GTOTYPE TYPE STRING,
BUYER_BUSTYP TYPE STRING,
BUYER_PHONE TYPE STRING,
BUYER_MOBILE TYPE STRING,
BUYER_PROVINCE TYPE STRING,
BUYER_EMAIL TYPE STRING,
SELLER_NAME TYPE STRING,
SELLER_PHONE TYPE STRING,
SEND_TYPE TYPE STRING,
RED_NOTE_IND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDGT_S_HEADER_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_IDGT_S_HEADER_STR-VBELN sy-vline 
WA_IDGT_S_HEADER_STR-COMBINEID sy-vline 
WA_IDGT_S_HEADER_STR-SENTDATE sy-vline 
WA_IDGT_S_HEADER_STR-USERNAME sy-vline 
WA_IDGT_S_HEADER_STR-VBTYP sy-vline 
WA_IDGT_S_HEADER_STR-KUNNR sy-vline 
WA_IDGT_S_HEADER_STR-VKORG sy-vline 
WA_IDGT_S_HEADER_STR-VTWEG sy-vline 
WA_IDGT_S_HEADER_STR-SPART sy-vline 
WA_IDGT_S_HEADER_STR-BUKRS sy-vline 
WA_IDGT_S_HEADER_STR-CTYPE sy-vline 
WA_IDGT_S_HEADER_STR-KNAME1 sy-vline 
WA_IDGT_S_HEADER_STR-KSTCD5 sy-vline 
WA_IDGT_S_HEADER_STR-KSTRAS sy-vline 
WA_IDGT_S_HEADER_STR-KBANKA sy-vline 
WA_IDGT_S_HEADER_STR-VUSNAM sy-vline 
WA_IDGT_S_HEADER_STR-CUSNAM sy-vline 
WA_IDGT_S_HEADER_STR-VBANKA sy-vline 
WA_IDGT_S_HEADER_STR-VSTRAS sy-vline 
WA_IDGT_S_HEADER_STR-VSTCD1 sy-vline 
WA_IDGT_S_HEADER_STR-NETWR_DOC sy-vline 
WA_IDGT_S_HEADER_STR-CURRENCY sy-vline 
WA_IDGT_S_HEADER_STR-NOTE sy-vline 
WA_IDGT_S_HEADER_STR-POS_VBELN sy-vline 
WA_IDGT_S_HEADER_STR-SENT_FLAG sy-vline 
WA_IDGT_S_HEADER_STR-KURRF sy-vline 
WA_IDGT_S_HEADER_STR-FWBTR sy-vline 
WA_IDGT_S_HEADER_STR-FWAER sy-vline 
WA_IDGT_S_HEADER_STR-KUNAG sy-vline 
WA_IDGT_S_HEADER_STR-NOTE2 sy-vline 
WA_IDGT_S_HEADER_STR-DOC_DATE sy-vline 
WA_IDGT_S_HEADER_STR-DOC_TIME sy-vline 
WA_IDGT_S_HEADER_STR-GTKEY1 sy-vline 
WA_IDGT_S_HEADER_STR-GTKEY2 sy-vline 
WA_IDGT_S_HEADER_STR-GTKEY3 sy-vline 
WA_IDGT_S_HEADER_STR-GTOTYPE sy-vline 
WA_IDGT_S_HEADER_STR-BUYER_BUSTYP sy-vline 
WA_IDGT_S_HEADER_STR-BUYER_PHONE sy-vline 
WA_IDGT_S_HEADER_STR-BUYER_MOBILE sy-vline 
WA_IDGT_S_HEADER_STR-BUYER_PROVINCE sy-vline 
WA_IDGT_S_HEADER_STR-BUYER_EMAIL sy-vline 
WA_IDGT_S_HEADER_STR-SELLER_NAME sy-vline 
WA_IDGT_S_HEADER_STR-SELLER_PHONE sy-vline 
WA_IDGT_S_HEADER_STR-SEND_TYPE sy-vline 
WA_IDGT_S_HEADER_STR-RED_NOTE_IND sy-vline      INTO ld_text SEPARATED BY SPACE.

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