ABAP Select data from SAP table IDCNGA03 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IDCNGA03 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 IDCNGA03. 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 IDCNGA03 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_IDCNGA03 TYPE STANDARD TABLE OF IDCNGA03,
      WA_IDCNGA03 TYPE IDCNGA03,
      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: <IDCNGA03> TYPE IDCNGA03.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IDCNGA03.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IDCNGA03
  INTO TABLE IT_IDCNGA03.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDCNGA03
*  INTO TABLE @DATA(IT_IDCNGA032).
*--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_IDCNGA03 INDEX 1 INTO DATA(WA_IDCNGA032).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IDCNGA03 ASSIGNING <IDCNGA03>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDCNGA03>-IDCN012 = 1.
<IDCNGA03>-IDCN020 = 1.
<IDCNGA03>-IDCN021 = 1.
<IDCNGA03>-IDCN022 = 1.
<IDCNGA03>-IDCN023 = 1.

ENDLOOP.

LOOP AT IT_IDCNGA03 INTO WA_IDCNGA03.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDCNGA03-IDCN024, sy-vline,
  WA_IDCNGA03-IDCN025, sy-vline,
  WA_IDCNGA03-IDCN026, sy-vline,
  WA_IDCNGA03-IDCN027, sy-vline,
  WA_IDCNGA03-IDCN028, sy-vline,
  WA_IDCNGA03-IDCN029, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDCNGA03 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_IDCNGA03 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_IDCNGA03 INTO WA_IDCNGA03.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IDCNGA03_STR, 
IDCN012 TYPE STRING,
IDCN020 TYPE STRING,
IDCN021 TYPE STRING,
IDCN022 TYPE STRING,
IDCN023 TYPE STRING,
IDCN024 TYPE STRING,
IDCN025 TYPE STRING,
IDCN026 TYPE STRING,
IDCN027 TYPE STRING,
IDCN028 TYPE STRING,
IDCN029 TYPE STRING,
IDCN030 TYPE STRING,
IDCN031 TYPE STRING,
IDCN032 TYPE STRING,
IDCN033 TYPE STRING,
IDCN034 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDCNGA03_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_IDCNGA03_STR-IDCN012 sy-vline 
WA_IDCNGA03_STR-IDCN020 sy-vline 
WA_IDCNGA03_STR-IDCN021 sy-vline 
WA_IDCNGA03_STR-IDCN022 sy-vline 
WA_IDCNGA03_STR-IDCN023 sy-vline 
WA_IDCNGA03_STR-IDCN024 sy-vline 
WA_IDCNGA03_STR-IDCN025 sy-vline 
WA_IDCNGA03_STR-IDCN026 sy-vline 
WA_IDCNGA03_STR-IDCN027 sy-vline 
WA_IDCNGA03_STR-IDCN028 sy-vline 
WA_IDCNGA03_STR-IDCN029 sy-vline 
WA_IDCNGA03_STR-IDCN030 sy-vline 
WA_IDCNGA03_STR-IDCN031 sy-vline 
WA_IDCNGA03_STR-IDCN032 sy-vline 
WA_IDCNGA03_STR-IDCN033 sy-vline 
WA_IDCNGA03_STR-IDCN034 sy-vline      INTO ld_text SEPARATED BY SPACE.

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