ABAP Select data from SAP table CLUSAFTHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLUSAFTHEADER
*  INTO TABLE @DATA(IT_CLUSAFTHEADER2).
*--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_CLUSAFTHEADER INDEX 1 INTO DATA(WA_CLUSAFTHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLUSAFTHEADER>-MANDT = 1.
<CLUSAFTHEADER>-COMPANYCODE = 1.
<CLUSAFTHEADER>-STARTDATE = 1.
<CLUSAFTHEADER>-ENDDATE = 1.
<CLUSAFTHEADER>-FISCALYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLUSAFTHEADER-VATREGISTRATION, sy-vline,
  WA_CLUSAFTHEADER-COMPANYNAME, sy-vline,
  WA_CLUSAFTHEADER-STREETNAME, sy-vline,
  WA_CLUSAFTHEADER-HOUSENUMBER, sy-vline,
  WA_CLUSAFTHEADER-CITYNAME, sy-vline,
  WA_CLUSAFTHEADER-POSTALCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLUSAFTHEADER 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_CLUSAFTHEADER 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_CLUSAFTHEADER INTO WA_CLUSAFTHEADER.


*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 GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CLUSAFTHEADER-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLUSAFTHEADER-FISCALYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit SXIDN, internal->external for field EMAILADDRESS
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_CLUSAFTHEADER-EMAILADDRESS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLUSAFTHEADER-EMAILADDRESS.
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_CLUSAFTHEADER_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
FISCALYEAR TYPE STRING,
VATREGISTRATION TYPE STRING,
COMPANYNAME TYPE STRING,
STREETNAME TYPE STRING,
HOUSENUMBER TYPE STRING,
CITYNAME TYPE STRING,
POSTALCODE TYPE STRING,
COUNTRY TYPE STRING,
EMBEDDEDSWVERSIONSTATUSDESC TYPE STRING,
ADDRESSID TYPE STRING,
PERSON TYPE STRING,
FIRSTNAME TYPE STRING,
LASTNAME TYPE STRING,
PHONENUMBER TYPE STRING,
FAXNUMBER TYPE STRING,
EMAILADDRESS TYPE STRING,
URLFIELDLENGTH TYPE STRING,
WEBSITEURL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLUSAFTHEADER_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_CLUSAFTHEADER_STR-MANDT sy-vline 
WA_CLUSAFTHEADER_STR-COMPANYCODE sy-vline 
WA_CLUSAFTHEADER_STR-STARTDATE sy-vline 
WA_CLUSAFTHEADER_STR-ENDDATE sy-vline 
WA_CLUSAFTHEADER_STR-FISCALYEAR sy-vline 
WA_CLUSAFTHEADER_STR-VATREGISTRATION sy-vline 
WA_CLUSAFTHEADER_STR-COMPANYNAME sy-vline 
WA_CLUSAFTHEADER_STR-STREETNAME sy-vline 
WA_CLUSAFTHEADER_STR-HOUSENUMBER sy-vline 
WA_CLUSAFTHEADER_STR-CITYNAME sy-vline 
WA_CLUSAFTHEADER_STR-POSTALCODE sy-vline 
WA_CLUSAFTHEADER_STR-COUNTRY sy-vline 
WA_CLUSAFTHEADER_STR-EMBEDDEDSWVERSIONSTATUSDESC sy-vline 
WA_CLUSAFTHEADER_STR-ADDRESSID sy-vline 
WA_CLUSAFTHEADER_STR-PERSON sy-vline 
WA_CLUSAFTHEADER_STR-FIRSTNAME sy-vline 
WA_CLUSAFTHEADER_STR-LASTNAME sy-vline 
WA_CLUSAFTHEADER_STR-PHONENUMBER sy-vline 
WA_CLUSAFTHEADER_STR-FAXNUMBER sy-vline 
WA_CLUSAFTHEADER_STR-EMAILADDRESS sy-vline 
WA_CLUSAFTHEADER_STR-URLFIELDLENGTH sy-vline 
WA_CLUSAFTHEADER_STR-WEBSITEURL sy-vline      INTO ld_text SEPARATED BY SPACE.

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