ABAP Select data from SAP table INTWKACTRELBD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INTWKACTRELBD
*  INTO TABLE @DATA(IT_INTWKACTRELBD2).
*--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_INTWKACTRELBD INDEX 1 INTO DATA(WA_INTWKACTRELBD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INTWKACTRELBD>-MANDT = 1.
<INTWKACTRELBD>-PREDECESSORPROJNTWKINTID = 1.
<INTWKACTRELBD>-PREDECESSORNTWKACTYINTID = 1.
<INTWKACTRELBD>-SUCCESSORPROJNTWKINTID = 1.
<INTWKACTRELBD>-SUCCESSORNTWKACTYINTID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INTWKACTRELBD-NETWORKACTIVITYRELATIONTYPE, sy-vline,
  WA_INTWKACTRELBD-MAXTIMEINTVLISUSEDFORSCHEDG, sy-vline,
  WA_INTWKACTRELBD-PREDECESSORPROJECTOBJECTNODE, sy-vline,
  WA_INTWKACTRELBD-PREDECESSORPROJECTNETWORK, sy-vline,
  WA_INTWKACTRELBD-PREDECESSORNETWORKACTIVITY, sy-vline,
  WA_INTWKACTRELBD-SUCCESSORPROJECTOBJECTNODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INTWKACTRELBD 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_INTWKACTRELBD 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_INTWKACTRELBD INTO WA_INTWKACTRELBD.


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

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

*Conversion exit CUNIT, internal->external for field NETWORKACTIVITYINTMSNDURNUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_INTWKACTRELBD-NETWORKACTIVITYINTMSNDURNUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INTWKACTRELBD-NETWORKACTIVITYINTMSNDURNUNIT.
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_INTWKACTRELBD_STR, 
MANDT TYPE STRING,
PREDECESSORPROJNTWKINTID TYPE STRING,
PREDECESSORNTWKACTYINTID TYPE STRING,
SUCCESSORPROJNTWKINTID TYPE STRING,
SUCCESSORNTWKACTYINTID TYPE STRING,
NETWORKACTIVITYRELATIONTYPE TYPE STRING,
MAXTIMEINTVLISUSEDFORSCHEDG TYPE STRING,
PREDECESSORPROJECTOBJECTNODE TYPE STRING,
PREDECESSORPROJECTNETWORK TYPE STRING,
PREDECESSORNETWORKACTIVITY TYPE STRING,
SUCCESSORPROJECTOBJECTNODE TYPE STRING,
SUCCESSORPROJECTNETWORK TYPE STRING,
SUCCESSORNETWORKACTIVITY TYPE STRING,
PROJECTNETWORKOBJECT TYPE STRING,
NETWORKACTIVITYINTMSNDURATION TYPE STRING,
NETWORKACTIVITYINTMSNDURNUNIT TYPE STRING,
OBJECTISDELETED TYPE STRING,
TIMEINTVLBTWNRELSHPINPCT TYPE STRING,
TIMEINTERVAL TYPE STRING,
FACTORYCALENDAR TYPE STRING,
PLANT TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INTWKACTRELBD_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_INTWKACTRELBD_STR-MANDT sy-vline 
WA_INTWKACTRELBD_STR-PREDECESSORPROJNTWKINTID sy-vline 
WA_INTWKACTRELBD_STR-PREDECESSORNTWKACTYINTID sy-vline 
WA_INTWKACTRELBD_STR-SUCCESSORPROJNTWKINTID sy-vline 
WA_INTWKACTRELBD_STR-SUCCESSORNTWKACTYINTID sy-vline 
WA_INTWKACTRELBD_STR-NETWORKACTIVITYRELATIONTYPE sy-vline 
WA_INTWKACTRELBD_STR-MAXTIMEINTVLISUSEDFORSCHEDG sy-vline 
WA_INTWKACTRELBD_STR-PREDECESSORPROJECTOBJECTNODE sy-vline 
WA_INTWKACTRELBD_STR-PREDECESSORPROJECTNETWORK sy-vline 
WA_INTWKACTRELBD_STR-PREDECESSORNETWORKACTIVITY sy-vline 
WA_INTWKACTRELBD_STR-SUCCESSORPROJECTOBJECTNODE sy-vline 
WA_INTWKACTRELBD_STR-SUCCESSORPROJECTNETWORK sy-vline 
WA_INTWKACTRELBD_STR-SUCCESSORNETWORKACTIVITY sy-vline 
WA_INTWKACTRELBD_STR-PROJECTNETWORKOBJECT sy-vline 
WA_INTWKACTRELBD_STR-NETWORKACTIVITYINTMSNDURATION sy-vline 
WA_INTWKACTRELBD_STR-NETWORKACTIVITYINTMSNDURNUNIT sy-vline 
WA_INTWKACTRELBD_STR-OBJECTISDELETED sy-vline 
WA_INTWKACTRELBD_STR-TIMEINTVLBTWNRELSHPINPCT sy-vline 
WA_INTWKACTRELBD_STR-TIMEINTERVAL sy-vline 
WA_INTWKACTRELBD_STR-FACTORYCALENDAR sy-vline 
WA_INTWKACTRELBD_STR-PLANT sy-vline 
WA_INTWKACTRELBD_STR-WORKCENTERINTERNALID sy-vline      INTO ld_text SEPARATED BY SPACE.

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