ABAP Select data from SAP table ICLN_DOAU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICLN_DOAU
*  INTO TABLE @DATA(IT_ICLN_DOAU2).
*--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_ICLN_DOAU INDEX 1 INTO DATA(WA_ICLN_DOAU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICLN_DOAU>-PROPMAKE = 1.
<ICLN_DOAU>-PROPMODEL = 1.
<ICLN_DOAU>-PLATENO = 1.
<ICLN_DOAU>-PLATECOUNTRY = 1.
<ICLN_DOAU>-PLATEREGION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICLN_DOAU-CONSTYEAR, sy-vline,
  WA_ICLN_DOAU-MILEAGE, sy-vline,
  WA_ICLN_DOAU-MILEAGEUNIT, sy-vline,
  WA_ICLN_DOAU-VIN, sy-vline,
  WA_ICLN_DOAU-LOCATION, sy-vline,
  WA_ICLN_DOAU-XPARKED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICLN_DOAU 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_ICLN_DOAU 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_ICLN_DOAU INTO WA_ICLN_DOAU.


*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 CUNIT, internal->external for field MILEAGEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICLN_DOAU-MILEAGEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLN_DOAU-MILEAGEUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOCATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICLN_DOAU-LOCATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLN_DOAU-LOCATION.
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_ICLN_DOAU_STR, 
PROPMAKE TYPE STRING,
PROPMODEL TYPE STRING,
PLATENO TYPE STRING,
PLATECOUNTRY TYPE STRING,
PLATEREGION TYPE STRING,
CONSTYEAR TYPE STRING,
MILEAGE TYPE STRING,
MILEAGEUNIT TYPE STRING,
VIN TYPE STRING,
LOCATION TYPE STRING,
XPARKED TYPE STRING,
FIRSTREG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICLN_DOAU_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_ICLN_DOAU_STR-PROPMAKE sy-vline 
WA_ICLN_DOAU_STR-PROPMODEL sy-vline 
WA_ICLN_DOAU_STR-PLATENO sy-vline 
WA_ICLN_DOAU_STR-PLATECOUNTRY sy-vline 
WA_ICLN_DOAU_STR-PLATEREGION sy-vline 
WA_ICLN_DOAU_STR-CONSTYEAR sy-vline 
WA_ICLN_DOAU_STR-MILEAGE sy-vline 
WA_ICLN_DOAU_STR-MILEAGEUNIT sy-vline 
WA_ICLN_DOAU_STR-VIN sy-vline 
WA_ICLN_DOAU_STR-LOCATION sy-vline 
WA_ICLN_DOAU_STR-XPARKED sy-vline 
WA_ICLN_DOAU_STR-FIRSTREG sy-vline      INTO ld_text SEPARATED BY SPACE.

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