ABAP Select data from SAP table ICDEFRESH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICDEFRESH
*  INTO TABLE @DATA(IT_ICDEFRESH2).
*--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_ICDEFRESH INDEX 1 INTO DATA(WA_ICDEFRESH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICDEFRESH>-MANDT = 1.
<ICDEFRESH>-CALCULATIONRESULTHEADERUUID = 1.
<ICDEFRESH>-CALCULATIONROOTUUID = 1.
<ICDEFRESH>-CREATIONDATETIME = 1.
<ICDEFRESH>-CREATEDBYUSER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICDEFRESH-LASTCHANGEDATETIME, sy-vline,
  WA_ICDEFRESH-LASTCHANGEDBYUSER, sy-vline,
  WA_ICDEFRESH-CALCULATIONRESULTHEADERID, sy-vline,
  WA_ICDEFRESH-CALCULATIONRESULTHEADERNAME, sy-vline,
  WA_ICDEFRESH-EHSCALCULATIONSETUPNAME, sy-vline,
  WA_ICDEFRESH-CALCULATIONRESULTHEADERTITLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICDEFRESH 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_ICDEFRESH 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_ICDEFRESH INTO WA_ICDEFRESH.


*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 TSTLC, internal->external for field CREATIONDATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_ICDEFRESH-CREATIONDATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICDEFRESH-CREATIONDATETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field LASTCHANGEDATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_ICDEFRESH-LASTCHANGEDATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICDEFRESH-LASTCHANGEDATETIME.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit EHUNI, internal->external for field UNITOFMEASURENAME
CALL FUNCTION 'CONVERSION_EXIT_EHUNI_OUTPUT'
  EXPORTING
    input =                      WA_ICDEFRESH-UNITOFMEASURENAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICDEFRESH-UNITOFMEASURENAME.
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_ICDEFRESH_STR, 
MANDT TYPE STRING,
CALCULATIONRESULTHEADERUUID TYPE STRING,
CALCULATIONROOTUUID TYPE STRING,
CREATIONDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
CALCULATIONRESULTHEADERID TYPE STRING,
CALCULATIONRESULTHEADERNAME TYPE STRING,
EHSCALCULATIONSETUPNAME TYPE STRING,
CALCULATIONRESULTHEADERTITLE TYPE STRING,
DATAUSAGEPERIODICITY TYPE STRING,
EHSSUBJECTTYPE TYPE STRING,
EHSSUBJECTUUID TYPE STRING,
EHSCALCMIGRATIONSOURCE TYPE STRING,
EHSLOCATIONUUID TYPE STRING,
UNITOFMEASURENAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICDEFRESH_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_ICDEFRESH_STR-MANDT sy-vline 
WA_ICDEFRESH_STR-CALCULATIONRESULTHEADERUUID sy-vline 
WA_ICDEFRESH_STR-CALCULATIONROOTUUID sy-vline 
WA_ICDEFRESH_STR-CREATIONDATETIME sy-vline 
WA_ICDEFRESH_STR-CREATEDBYUSER sy-vline 
WA_ICDEFRESH_STR-LASTCHANGEDATETIME sy-vline 
WA_ICDEFRESH_STR-LASTCHANGEDBYUSER sy-vline 
WA_ICDEFRESH_STR-CALCULATIONRESULTHEADERID sy-vline 
WA_ICDEFRESH_STR-CALCULATIONRESULTHEADERNAME sy-vline 
WA_ICDEFRESH_STR-EHSCALCULATIONSETUPNAME sy-vline 
WA_ICDEFRESH_STR-CALCULATIONRESULTHEADERTITLE sy-vline 
WA_ICDEFRESH_STR-DATAUSAGEPERIODICITY sy-vline 
WA_ICDEFRESH_STR-EHSSUBJECTTYPE sy-vline 
WA_ICDEFRESH_STR-EHSSUBJECTUUID sy-vline 
WA_ICDEFRESH_STR-EHSCALCMIGRATIONSOURCE sy-vline 
WA_ICDEFRESH_STR-EHSLOCATIONUUID sy-vline 
WA_ICDEFRESH_STR-UNITOFMEASURENAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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