ABAP Select data from SAP table INTWKACTYVH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INTWKACTYVH
*  INTO TABLE @DATA(IT_INTWKACTYVH2).
*--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_INTWKACTYVH INDEX 1 INTO DATA(WA_INTWKACTYVH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INTWKACTYVH>-MANDT = 1.
<INTWKACTYVH>-PROJECTNETWORK = 1.
<INTWKACTYVH>-NETWORKACTIVITY = 1.
<INTWKACTYVH>-NETWORKACTIVITYDESCRIPTION = 1.
<INTWKACTYVH>-NETWORKACTIVITYCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INTWKACTYVH-WORKCENTER, sy-vline,
  WA_INTWKACTYVH-PLANT, sy-vline,
  WA_INTWKACTYVH-FREEDEFINEDATTRIBUTE01, sy-vline,
  WA_INTWKACTYVH-FREEDEFINEDATTRIBUTE02, sy-vline,
  WA_INTWKACTYVH-FREEDEFINEDATTRIBUTE04, sy-vline,
  WA_INTWKACTYVH-FREEDEFINEDATTRIBUTE03, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INTWKACTYVH 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_INTWKACTYVH 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_INTWKACTYVH INTO WA_INTWKACTYVH.


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

*Conversion exit NUMCV, internal->external for field NETWORKACTIVITY
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_INTWKACTYVH-NETWORKACTIVITY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INTWKACTYVH-NETWORKACTIVITY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field WBSELEMENTINTERNALID
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_INTWKACTYVH-WBSELEMENTINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INTWKACTYVH-WBSELEMENTINTERNALID.
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_INTWKACTYVH_STR, 
MANDT TYPE STRING,
PROJECTNETWORK TYPE STRING,
NETWORKACTIVITY TYPE STRING,
NETWORKACTIVITYDESCRIPTION TYPE STRING,
NETWORKACTIVITYCATEGORY TYPE STRING,
WORKCENTER TYPE STRING,
PLANT TYPE STRING,
FREEDEFINEDATTRIBUTE01 TYPE STRING,
FREEDEFINEDATTRIBUTE02 TYPE STRING,
FREEDEFINEDATTRIBUTE04 TYPE STRING,
FREEDEFINEDATTRIBUTE03 TYPE STRING,
FREEDEFINEDINDICATOR1 TYPE STRING,
FREEDEFINEDINDICATOR2 TYPE STRING,
WBSELEMENTINTERNALID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INTWKACTYVH_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_INTWKACTYVH_STR-MANDT sy-vline 
WA_INTWKACTYVH_STR-PROJECTNETWORK sy-vline 
WA_INTWKACTYVH_STR-NETWORKACTIVITY sy-vline 
WA_INTWKACTYVH_STR-NETWORKACTIVITYDESCRIPTION sy-vline 
WA_INTWKACTYVH_STR-NETWORKACTIVITYCATEGORY sy-vline 
WA_INTWKACTYVH_STR-WORKCENTER sy-vline 
WA_INTWKACTYVH_STR-PLANT sy-vline 
WA_INTWKACTYVH_STR-FREEDEFINEDATTRIBUTE01 sy-vline 
WA_INTWKACTYVH_STR-FREEDEFINEDATTRIBUTE02 sy-vline 
WA_INTWKACTYVH_STR-FREEDEFINEDATTRIBUTE04 sy-vline 
WA_INTWKACTYVH_STR-FREEDEFINEDATTRIBUTE03 sy-vline 
WA_INTWKACTYVH_STR-FREEDEFINEDINDICATOR1 sy-vline 
WA_INTWKACTYVH_STR-FREEDEFINEDINDICATOR2 sy-vline 
WA_INTWKACTYVH_STR-WBSELEMENTINTERNALID sy-vline      INTO ld_text SEPARATED BY SPACE.

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