ABAP Select data from SAP table IEHSTASK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEHSTASK
*  INTO TABLE @DATA(IT_IEHSTASK2).
*--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_IEHSTASK INDEX 1 INTO DATA(WA_IEHSTASK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEHSTASK>-MANDT = 1.
<IEHSTASK>-WORKFLOWTASKINTERNALID = 1.
<IEHSTASK>-WORKFLOWTASKTYPE = 1.
<IEHSTASK>-WORKFLOWTASKPRIORITY = 1.
<IEHSTASK>-WORKFLOWTASKSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEHSTASK-WRKFLWTSKCREATIONUTCDATETIME, sy-vline,
  WA_IEHSTASK-WRKFLWTSKCOMPLETIONUTCDATETIME, sy-vline,
  WA_IEHSTASK-WORKFLOWTASKCREATEDBYUSER, sy-vline,
  WA_IEHSTASK-WORKFLOWTASKCURRENTUSER, sy-vline,
  WA_IEHSTASK-WORKFLOWTASKDEFINITION, sy-vline,
  WA_IEHSTASK-WORKFLOWTASKDEFINITIONOBJTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEHSTASK 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_IEHSTASK 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_IEHSTASK INTO WA_IEHSTASK.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IEHSTASK_STR, 
MANDT TYPE STRING,
WORKFLOWTASKINTERNALID TYPE STRING,
WORKFLOWTASKTYPE TYPE STRING,
WORKFLOWTASKPRIORITY TYPE STRING,
WORKFLOWTASKSTATUS TYPE STRING,
WRKFLWTSKCREATIONUTCDATETIME TYPE STRING,
WRKFLWTSKCOMPLETIONUTCDATETIME TYPE STRING,
WORKFLOWTASKCREATEDBYUSER TYPE STRING,
WORKFLOWTASKCURRENTUSER TYPE STRING,
WORKFLOWTASKDEFINITION TYPE STRING,
WORKFLOWTASKDEFINITIONOBJTYPE TYPE STRING,
WORKFLOWTASKDEFINITIONOBJECT TYPE STRING,
TOPLEVELWORKFLOWTASK TYPE STRING,
EHSTASKINSTANCESTEPNODEID TYPE STRING,
EHSTASKHOSTOBJECTADAPTERCLASS TYPE STRING,
EHSTASKHOSTOBJECTINSTANCE TYPE STRING,
WORKFLOWTASKNAME TYPE STRING,
EHSTASKDUEDATE TYPE STRING,
EHSTASKCURRENTPROCESSORUSER TYPE STRING,
EHSTASKASSIGNEDLOCROLE TYPE STRING,
EHSTASKAPPROVERLOCROLE TYPE STRING,
EHSTASKDEFINITIONUUID TYPE STRING,
INCIDENTHASACCESSRESTRICTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEHSTASK_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_IEHSTASK_STR-MANDT sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKINTERNALID sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKTYPE sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKPRIORITY sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKSTATUS sy-vline 
WA_IEHSTASK_STR-WRKFLWTSKCREATIONUTCDATETIME sy-vline 
WA_IEHSTASK_STR-WRKFLWTSKCOMPLETIONUTCDATETIME sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKCREATEDBYUSER sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKCURRENTUSER sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKDEFINITION sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKDEFINITIONOBJTYPE sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKDEFINITIONOBJECT sy-vline 
WA_IEHSTASK_STR-TOPLEVELWORKFLOWTASK sy-vline 
WA_IEHSTASK_STR-EHSTASKINSTANCESTEPNODEID sy-vline 
WA_IEHSTASK_STR-EHSTASKHOSTOBJECTADAPTERCLASS sy-vline 
WA_IEHSTASK_STR-EHSTASKHOSTOBJECTINSTANCE sy-vline 
WA_IEHSTASK_STR-WORKFLOWTASKNAME sy-vline 
WA_IEHSTASK_STR-EHSTASKDUEDATE sy-vline 
WA_IEHSTASK_STR-EHSTASKCURRENTPROCESSORUSER sy-vline 
WA_IEHSTASK_STR-EHSTASKASSIGNEDLOCROLE sy-vline 
WA_IEHSTASK_STR-EHSTASKAPPROVERLOCROLE sy-vline 
WA_IEHSTASK_STR-EHSTASKDEFINITIONUUID sy-vline 
WA_IEHSTASK_STR-INCIDENTHASACCESSRESTRICTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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