ABAP Select data from SAP table IDGT_S_CANC 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_CANC 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_CANC. 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_CANC 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_CANC TYPE STANDARD TABLE OF IDGT_S_CANC,
      WA_IDGT_S_CANC TYPE IDGT_S_CANC,
      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_CANC> TYPE IDGT_S_CANC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDGT_S_CANC
*  INTO TABLE @DATA(IT_IDGT_S_CANC2).
*--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_CANC INDEX 1 INTO DATA(WA_IDGT_S_CANC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDGT_S_CANC>-VBELN = 1.
<IDGT_S_CANC>-REFVBELN = 1.
<IDGT_S_CANC>-SFAKN = 1.
<IDGT_S_CANC>-COMBINEID = 1.
<IDGT_S_CANC>-GTVBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDGT_S_CANC-INVTYP, sy-vline,
  WA_IDGT_S_CANC-TYPCODE, sy-vline,
  WA_IDGT_S_CANC-GTSTATUS, sy-vline,
  WA_IDGT_S_CANC-VUSNAM, sy-vline,
  WA_IDGT_S_CANC-CUSNAM, sy-vline,
  WA_IDGT_S_CANC-SENTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDGT_S_CANC 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_CANC 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_CANC INTO WA_IDGT_S_CANC.


*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_CANC-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDGT_S_CANC-VBELN.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field INVTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDGT_S_CANC-INVTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDGT_S_CANC-INVTYP.
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_CANC_STR, 
VBELN TYPE STRING,
REFVBELN TYPE STRING,
SFAKN TYPE STRING,
COMBINEID TYPE STRING,
GTVBELN TYPE STRING,
INVTYP TYPE STRING,
TYPCODE TYPE STRING,
GTSTATUS TYPE STRING,
VUSNAM TYPE STRING,
CUSNAM TYPE STRING,
SENTDATE TYPE STRING,
VBTYP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
BUKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDGT_S_CANC_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_CANC_STR-VBELN sy-vline 
WA_IDGT_S_CANC_STR-REFVBELN sy-vline 
WA_IDGT_S_CANC_STR-SFAKN sy-vline 
WA_IDGT_S_CANC_STR-COMBINEID sy-vline 
WA_IDGT_S_CANC_STR-GTVBELN sy-vline 
WA_IDGT_S_CANC_STR-INVTYP sy-vline 
WA_IDGT_S_CANC_STR-TYPCODE sy-vline 
WA_IDGT_S_CANC_STR-GTSTATUS sy-vline 
WA_IDGT_S_CANC_STR-VUSNAM sy-vline 
WA_IDGT_S_CANC_STR-CUSNAM sy-vline 
WA_IDGT_S_CANC_STR-SENTDATE sy-vline 
WA_IDGT_S_CANC_STR-VBTYP sy-vline 
WA_IDGT_S_CANC_STR-VKORG sy-vline 
WA_IDGT_S_CANC_STR-VTWEG sy-vline 
WA_IDGT_S_CANC_STR-SPART sy-vline 
WA_IDGT_S_CANC_STR-BUKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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