ABAP Select data from SAP table INTWKACTRELGR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INTWKACTRELGR
*  INTO TABLE @DATA(IT_INTWKACTRELGR2).
*--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_INTWKACTRELGR INDEX 1 INTO DATA(WA_INTWKACTRELGR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INTWKACTRELGR>-MANDT = 1.
<INTWKACTRELGR>-PROJECTOBJECTNODE = 1.
<INTWKACTRELGR>-PREDECESSORPROJECTOBJECTNODE = 1.
<INTWKACTRELGR>-SUCCESSORPROJECTOBJECTNODE = 1.
<INTWKACTRELGR>-NETWORKACTIVITYRELATIONTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INTWKACTRELGR-MAXTIMEINTVLISUSEDFORSCHEDG, sy-vline,
  WA_INTWKACTRELGR-PREDECESSORPROJNTWKINTID, sy-vline,
  WA_INTWKACTRELGR-PREDECESSORNTWKACTYINTID, sy-vline,
  WA_INTWKACTRELGR-PREDECESSORNETWORKACTIVITY, sy-vline,
  WA_INTWKACTRELGR-PREDECESSORPROJECTNETWORK, sy-vline,
  WA_INTWKACTRELGR-SUCCESSORPROJNTWKINTID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INTWKACTRELGR 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_INTWKACTRELGR 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_INTWKACTRELGR INTO WA_INTWKACTRELGR.


*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_INTWKACTRELGR-PREDECESSORPROJECTNETWORK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INTWKACTRELGR-PREDECESSORPROJECTNETWORK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SUCCESSORPROJECTNETWORK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_INTWKACTRELGR-SUCCESSORPROJECTNETWORK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INTWKACTRELGR-SUCCESSORPROJECTNETWORK.
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_INTWKACTRELGR_STR, 
MANDT TYPE STRING,
PROJECTOBJECTNODE TYPE STRING,
PREDECESSORPROJECTOBJECTNODE TYPE STRING,
SUCCESSORPROJECTOBJECTNODE TYPE STRING,
NETWORKACTIVITYRELATIONTYPE TYPE STRING,
MAXTIMEINTVLISUSEDFORSCHEDG TYPE STRING,
PREDECESSORPROJNTWKINTID TYPE STRING,
PREDECESSORNTWKACTYINTID TYPE STRING,
PREDECESSORNETWORKACTIVITY TYPE STRING,
PREDECESSORPROJECTNETWORK TYPE STRING,
SUCCESSORPROJNTWKINTID TYPE STRING,
SUCCESSORNTWKACTYINTID TYPE STRING,
SUCCESSORNETWORKACTIVITY TYPE STRING,
SUCCESSORPROJECTNETWORK TYPE STRING,
NETWORKACTYRELATIONDESCRIPTION TYPE STRING,
PLANT TYPE STRING,
WORKCENTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INTWKACTRELGR_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_INTWKACTRELGR_STR-MANDT sy-vline 
WA_INTWKACTRELGR_STR-PROJECTOBJECTNODE sy-vline 
WA_INTWKACTRELGR_STR-PREDECESSORPROJECTOBJECTNODE sy-vline 
WA_INTWKACTRELGR_STR-SUCCESSORPROJECTOBJECTNODE sy-vline 
WA_INTWKACTRELGR_STR-NETWORKACTIVITYRELATIONTYPE sy-vline 
WA_INTWKACTRELGR_STR-MAXTIMEINTVLISUSEDFORSCHEDG sy-vline 
WA_INTWKACTRELGR_STR-PREDECESSORPROJNTWKINTID sy-vline 
WA_INTWKACTRELGR_STR-PREDECESSORNTWKACTYINTID sy-vline 
WA_INTWKACTRELGR_STR-PREDECESSORNETWORKACTIVITY sy-vline 
WA_INTWKACTRELGR_STR-PREDECESSORPROJECTNETWORK sy-vline 
WA_INTWKACTRELGR_STR-SUCCESSORPROJNTWKINTID sy-vline 
WA_INTWKACTRELGR_STR-SUCCESSORNTWKACTYINTID sy-vline 
WA_INTWKACTRELGR_STR-SUCCESSORNETWORKACTIVITY sy-vline 
WA_INTWKACTRELGR_STR-SUCCESSORPROJECTNETWORK sy-vline 
WA_INTWKACTRELGR_STR-NETWORKACTYRELATIONDESCRIPTION sy-vline 
WA_INTWKACTRELGR_STR-PLANT sy-vline 
WA_INTWKACTRELGR_STR-WORKCENTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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