ABAP Select data from SAP table ICLNOLDOAU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICLNOLDOAU
*  INTO TABLE @DATA(IT_ICLNOLDOAU2).
*--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_ICLNOLDOAU INDEX 1 INTO DATA(WA_ICLNOLDOAU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICLNOLDOAU>-CLIENT = 1.
<ICLNOLDOAU>-NOTICE = 1.
<ICLNOLDOAU>-DAMAGEDOBJ = 1.
<ICLNOLDOAU>-CREATEDBY = 1.
<ICLNOLDOAU>-CREATETIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICLNOLDOAU-CHANGEDBY, sy-vline,
  WA_ICLNOLDOAU-CHANGETIME, sy-vline,
  WA_ICLNOLDOAU-PROPMAKE, sy-vline,
  WA_ICLNOLDOAU-PROPMODEL, sy-vline,
  WA_ICLNOLDOAU-PLATENO, sy-vline,
  WA_ICLNOLDOAU-PLATECOUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICLNOLDOAU 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_ICLNOLDOAU 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_ICLNOLDOAU INTO WA_ICLNOLDOAU.


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

*Conversion exit TSTAM, internal->external for field CREATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICLNOLDOAU-CREATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLNOLDOAU-CREATETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTAM, internal->external for field CHANGETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICLNOLDOAU-CHANGETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLNOLDOAU-CHANGETIME.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LOCATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICLNOLDOAU-LOCATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLNOLDOAU-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_ICLNOLDOAU_STR, 
CLIENT TYPE STRING,
NOTICE TYPE STRING,
DAMAGEDOBJ TYPE STRING,
CREATEDBY TYPE STRING,
CREATETIME TYPE STRING,
CHANGEDBY TYPE STRING,
CHANGETIME TYPE STRING,
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_ICLNOLDOAU_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_ICLNOLDOAU_STR-CLIENT sy-vline 
WA_ICLNOLDOAU_STR-NOTICE sy-vline 
WA_ICLNOLDOAU_STR-DAMAGEDOBJ sy-vline 
WA_ICLNOLDOAU_STR-CREATEDBY sy-vline 
WA_ICLNOLDOAU_STR-CREATETIME sy-vline 
WA_ICLNOLDOAU_STR-CHANGEDBY sy-vline 
WA_ICLNOLDOAU_STR-CHANGETIME sy-vline 
WA_ICLNOLDOAU_STR-PROPMAKE sy-vline 
WA_ICLNOLDOAU_STR-PROPMODEL sy-vline 
WA_ICLNOLDOAU_STR-PLATENO sy-vline 
WA_ICLNOLDOAU_STR-PLATECOUNTRY sy-vline 
WA_ICLNOLDOAU_STR-PLATEREGION sy-vline 
WA_ICLNOLDOAU_STR-CONSTYEAR sy-vline 
WA_ICLNOLDOAU_STR-MILEAGE sy-vline 
WA_ICLNOLDOAU_STR-MILEAGEUNIT sy-vline 
WA_ICLNOLDOAU_STR-VIN sy-vline 
WA_ICLNOLDOAU_STR-LOCATION sy-vline 
WA_ICLNOLDOAU_STR-XPARKED sy-vline 
WA_ICLNOLDOAU_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.