ABAP Select data from SAP table IACTIVITY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IACTIVITY
*  INTO TABLE @DATA(IT_IACTIVITY2).
*--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_IACTIVITY INDEX 1 INTO DATA(WA_IACTIVITY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IACTIVITY>-MANDT = 1.
<IACTIVITY>-CUSTMGMTOBJECTTYPE = 1.
<IACTIVITY>-CUSTMGMTACTIVITY = 1.
<IACTIVITY>-CUSTMGMTACTIVITYCATEGORY = 1.
<IACTIVITY>-CUSTMGMTACTIVITYDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IACTIVITY-CUSTMGMTACTIVITYPRIORITY, sy-vline,
  WA_IACTIVITY-CUSTMGMTACTIVITYISPRIVATE, sy-vline,
  WA_IACTIVITY-BUSINESSACTIVITYCLASS, sy-vline,
  WA_IACTIVITY-CUSTMGMTACTIVITYDIRECTION, sy-vline,
  WA_IACTIVITY-CUSTMGMTACTIVITYLOCATIONTEXT, sy-vline,
  WA_IACTIVITY-CUSTMGMTACTYISDSPDINCALENDAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IACTIVITY 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_IACTIVITY 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_IACTIVITY INTO WA_IACTIVITY.


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

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

*Conversion exit ALPHA, internal->external for field CONTACTPERSON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IACTIVITY-CONTACTPERSON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IACTIVITY-CONTACTPERSON.
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_IACTIVITY_STR, 
MANDT TYPE STRING,
CUSTMGMTOBJECTTYPE TYPE STRING,
CUSTMGMTACTIVITY TYPE STRING,
CUSTMGMTACTIVITYCATEGORY TYPE STRING,
CUSTMGMTACTIVITYDESCRIPTION TYPE STRING,
CUSTMGMTACTIVITYPRIORITY TYPE STRING,
CUSTMGMTACTIVITYISPRIVATE TYPE STRING,
BUSINESSACTIVITYCLASS TYPE STRING,
CUSTMGMTACTIVITYDIRECTION TYPE STRING,
CUSTMGMTACTIVITYLOCATIONTEXT TYPE STRING,
CUSTMGMTACTYISDSPDINCALENDAR TYPE STRING,
CUSTMGMTTASKCOMPLTNRATEINPCT TYPE STRING,
CUSTMGMTACTIVITYUUID TYPE STRING,
CUSTMGMTACTIVITYTYPE TYPE STRING,
ACCOUNT TYPE STRING,
CONTACTPERSON TYPE STRING,
CUSTMGMTACTIVITYSTATUS TYPE STRING,
CUSTMGMTACTIVITYISREJECTED TYPE STRING,
CUSTMGMTACTIVITYSTARTDATETIME TYPE STRING,
CUSTMGMTACTIVITYENDDATETIME TYPE STRING,
SALESORGANIZATIONORGUNITID TYPE STRING,
SALESOFFICEORGUNITID TYPE STRING,
SALESGROUPORGUNITID TYPE STRING,
RESPONSIBLESALESORGANIZATION TYPE STRING,
SERVICEORGANIZATION TYPE STRING,
RESPONSIBLESERVICEORGANIZATION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
DIVISION TYPE STRING,
TEXTOBJECTKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IACTIVITY_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_IACTIVITY_STR-MANDT sy-vline 
WA_IACTIVITY_STR-CUSTMGMTOBJECTTYPE sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITY sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYCATEGORY sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYDESCRIPTION sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYPRIORITY sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYISPRIVATE sy-vline 
WA_IACTIVITY_STR-BUSINESSACTIVITYCLASS sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYDIRECTION sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYLOCATIONTEXT sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTYISDSPDINCALENDAR sy-vline 
WA_IACTIVITY_STR-CUSTMGMTTASKCOMPLTNRATEINPCT sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYUUID sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYTYPE sy-vline 
WA_IACTIVITY_STR-ACCOUNT sy-vline 
WA_IACTIVITY_STR-CONTACTPERSON sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYSTATUS sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYISREJECTED sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYSTARTDATETIME sy-vline 
WA_IACTIVITY_STR-CUSTMGMTACTIVITYENDDATETIME sy-vline 
WA_IACTIVITY_STR-SALESORGANIZATIONORGUNITID sy-vline 
WA_IACTIVITY_STR-SALESOFFICEORGUNITID sy-vline 
WA_IACTIVITY_STR-SALESGROUPORGUNITID sy-vline 
WA_IACTIVITY_STR-RESPONSIBLESALESORGANIZATION sy-vline 
WA_IACTIVITY_STR-SERVICEORGANIZATION sy-vline 
WA_IACTIVITY_STR-RESPONSIBLESERVICEORGANIZATION sy-vline 
WA_IACTIVITY_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_IACTIVITY_STR-DIVISION sy-vline 
WA_IACTIVITY_STR-TEXTOBJECTKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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