ABAP Select data from SAP table IDGT_GTDH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IDGT_GTDH 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_GTDH. 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_GTDH 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_GTDH TYPE STANDARD TABLE OF IDGT_GTDH,
      WA_IDGT_GTDH TYPE IDGT_GTDH,
      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_GTDH> TYPE IDGT_GTDH.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDGT_GTDH
*  INTO TABLE @DATA(IT_IDGT_GTDH2).
*--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_GTDH INDEX 1 INTO DATA(WA_IDGT_GTDH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDGT_GTDH>-MANDT = 1.
<IDGT_GTDH>-VBELN_GTD = 1.
<IDGT_GTDH>-VKORG = 1.
<IDGT_GTDH>-GTDSTAT = 1.
<IDGT_GTDH>-GTCATG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDGT_GTDH-INVTYP, sy-vline,
  WA_IDGT_GTDH-CANCELIND, sy-vline,
  WA_IDGT_GTDH-GLISTIND, sy-vline,
  WA_IDGT_GTDH-NETWR, sy-vline,
  WA_IDGT_GTDH-TAXAMT, sy-vline,
  WA_IDGT_GTDH-DISC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDGT_GTDH 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_GTDH 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_GTDH INTO WA_IDGT_GTDH.


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

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

*Conversion exit EXCRT, internal->external for field KURRF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_IDGT_GTDH-KURRF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDGT_GTDH-KURRF.
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_GTDH_STR, 
MANDT TYPE STRING,
VBELN_GTD TYPE STRING,
VKORG TYPE STRING,
GTDSTAT TYPE STRING,
GTCATG TYPE STRING,
INVTYP TYPE STRING,
CANCELIND TYPE STRING,
GLISTIND TYPE STRING,
NETWR TYPE STRING,
TAXAMT TYPE STRING,
DISC TYPE STRING,
DISCTAX TYPE STRING,
CURRENCY TYPE STRING,
TAXRATE TYPE STRING,
KUNRG TYPE STRING,
KNAME1 TYPE STRING,
KSTCD5 TYPE STRING,
KSTRAS TYPE STRING,
KBANKA TYPE STRING,
VBANKA TYPE STRING,
VBELN_GTD_REF TYPE STRING,
NOTE TYPE STRING,
REVIEWER TYPE STRING,
RECEIVER TYPE STRING,
SENTDATE TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
GTSENT_TP TYPE STRING,
KURRF TYPE STRING,
FWBTR TYPE STRING,
FWAER TYPE STRING,
VSTRAS TYPE STRING,
IDGT_SDM_STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDGT_GTDH_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_GTDH_STR-MANDT sy-vline 
WA_IDGT_GTDH_STR-VBELN_GTD sy-vline 
WA_IDGT_GTDH_STR-VKORG sy-vline 
WA_IDGT_GTDH_STR-GTDSTAT sy-vline 
WA_IDGT_GTDH_STR-GTCATG sy-vline 
WA_IDGT_GTDH_STR-INVTYP sy-vline 
WA_IDGT_GTDH_STR-CANCELIND sy-vline 
WA_IDGT_GTDH_STR-GLISTIND sy-vline 
WA_IDGT_GTDH_STR-NETWR sy-vline 
WA_IDGT_GTDH_STR-TAXAMT sy-vline 
WA_IDGT_GTDH_STR-DISC sy-vline 
WA_IDGT_GTDH_STR-DISCTAX sy-vline 
WA_IDGT_GTDH_STR-CURRENCY sy-vline 
WA_IDGT_GTDH_STR-TAXRATE sy-vline 
WA_IDGT_GTDH_STR-KUNRG sy-vline 
WA_IDGT_GTDH_STR-KNAME1 sy-vline 
WA_IDGT_GTDH_STR-KSTCD5 sy-vline 
WA_IDGT_GTDH_STR-KSTRAS sy-vline 
WA_IDGT_GTDH_STR-KBANKA sy-vline 
WA_IDGT_GTDH_STR-VBANKA sy-vline 
WA_IDGT_GTDH_STR-VBELN_GTD_REF sy-vline 
WA_IDGT_GTDH_STR-NOTE sy-vline 
WA_IDGT_GTDH_STR-REVIEWER sy-vline 
WA_IDGT_GTDH_STR-RECEIVER sy-vline 
WA_IDGT_GTDH_STR-SENTDATE sy-vline 
WA_IDGT_GTDH_STR-ERNAM sy-vline 
WA_IDGT_GTDH_STR-ERDAT sy-vline 
WA_IDGT_GTDH_STR-ERZET sy-vline 
WA_IDGT_GTDH_STR-GTSENT_TP sy-vline 
WA_IDGT_GTDH_STR-KURRF sy-vline 
WA_IDGT_GTDH_STR-FWBTR sy-vline 
WA_IDGT_GTDH_STR-FWAER sy-vline 
WA_IDGT_GTDH_STR-VSTRAS sy-vline 
WA_IDGT_GTDH_STR-IDGT_SDM_STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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