ABAP Select data from SAP table IEHSTASKINST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEHSTASKINST
*  INTO TABLE @DATA(IT_IEHSTASKINST2).
*--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_IEHSTASKINST INDEX 1 INTO DATA(WA_IEHSTASKINST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEHSTASKINST>-MANDT = 1.
<IEHSTASKINST>-WORKFLOWTASKINTERNALID = 1.
<IEHSTASKINST>-EHSPLANNEDTASKUUID = 1.
<IEHSTASKINST>-EHSPLANNEDTASKID = 1.
<IEHSTASKINST>-WORKFLOWTASKSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEHSTASKINST-WORKFLOWTASKDEFINITION, sy-vline,
  WA_IEHSTASKINST-EHSTASKHOSTOBJECTADAPTERCLASS, sy-vline,
  WA_IEHSTASKINST-EHSSEMANTICOBJECT, sy-vline,
  WA_IEHSTASKINST-EHSTASKHOSTOBJECTINSTANCE, sy-vline,
  WA_IEHSTASKINST-EHSTASKADAPTERCLASS, sy-vline,
  WA_IEHSTASKINST-EHSTASKDEFINITIONTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEHSTASKINST 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_IEHSTASKINST 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_IEHSTASKINST INTO WA_IEHSTASKINST.


*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 EHSTASKASSIGNEDBP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEHSTASKINST-EHSTASKASSIGNEDBP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEHSTASKINST-EHSTASKASSIGNEDBP.
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_IEHSTASKINST_STR, 
MANDT TYPE STRING,
WORKFLOWTASKINTERNALID TYPE STRING,
EHSPLANNEDTASKUUID TYPE STRING,
EHSPLANNEDTASKID TYPE STRING,
WORKFLOWTASKSTATUS TYPE STRING,
WORKFLOWTASKDEFINITION TYPE STRING,
EHSTASKHOSTOBJECTADAPTERCLASS TYPE STRING,
EHSSEMANTICOBJECT TYPE STRING,
EHSTASKHOSTOBJECTINSTANCE TYPE STRING,
EHSTASKADAPTERCLASS TYPE STRING,
EHSTASKDEFINITIONTYPE TYPE STRING,
EHSTASKDEFINITIONUUID TYPE STRING,
EHSLOCATIONUUID TYPE STRING,
EHSTASKASSIGNEDBP TYPE STRING,
EHSTASKASSIGNEDLOCROLE TYPE STRING,
EHSTASKAPPROVERLOCROLE TYPE STRING,
EHSTASKPRIORITY TYPE STRING,
EHSTASKOWNERUSER TYPE STRING,
EHSTASKINSTANCEPROCESSORUSER TYPE STRING,
EHSTASKTIMEZONE TYPE STRING,
EHSTASKSTARTDATE TYPE STRING,
EHSTASKDUEDATE TYPE STRING,
EHSTASKINSTCECOMPLETIONDATE TYPE STRING,
WRKFLWTSKCOMPLETIONUTCDATETIME TYPE STRING,
EHSTASKSTATUS TYPE STRING,
WORKFLOWTASKNAME TYPE STRING,
INCIDENTHASACCESSRESTRICTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEHSTASKINST_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_IEHSTASKINST_STR-MANDT sy-vline 
WA_IEHSTASKINST_STR-WORKFLOWTASKINTERNALID sy-vline 
WA_IEHSTASKINST_STR-EHSPLANNEDTASKUUID sy-vline 
WA_IEHSTASKINST_STR-EHSPLANNEDTASKID sy-vline 
WA_IEHSTASKINST_STR-WORKFLOWTASKSTATUS sy-vline 
WA_IEHSTASKINST_STR-WORKFLOWTASKDEFINITION sy-vline 
WA_IEHSTASKINST_STR-EHSTASKHOSTOBJECTADAPTERCLASS sy-vline 
WA_IEHSTASKINST_STR-EHSSEMANTICOBJECT sy-vline 
WA_IEHSTASKINST_STR-EHSTASKHOSTOBJECTINSTANCE sy-vline 
WA_IEHSTASKINST_STR-EHSTASKADAPTERCLASS sy-vline 
WA_IEHSTASKINST_STR-EHSTASKDEFINITIONTYPE sy-vline 
WA_IEHSTASKINST_STR-EHSTASKDEFINITIONUUID sy-vline 
WA_IEHSTASKINST_STR-EHSLOCATIONUUID sy-vline 
WA_IEHSTASKINST_STR-EHSTASKASSIGNEDBP sy-vline 
WA_IEHSTASKINST_STR-EHSTASKASSIGNEDLOCROLE sy-vline 
WA_IEHSTASKINST_STR-EHSTASKAPPROVERLOCROLE sy-vline 
WA_IEHSTASKINST_STR-EHSTASKPRIORITY sy-vline 
WA_IEHSTASKINST_STR-EHSTASKOWNERUSER sy-vline 
WA_IEHSTASKINST_STR-EHSTASKINSTANCEPROCESSORUSER sy-vline 
WA_IEHSTASKINST_STR-EHSTASKTIMEZONE sy-vline 
WA_IEHSTASKINST_STR-EHSTASKSTARTDATE sy-vline 
WA_IEHSTASKINST_STR-EHSTASKDUEDATE sy-vline 
WA_IEHSTASKINST_STR-EHSTASKINSTCECOMPLETIONDATE sy-vline 
WA_IEHSTASKINST_STR-WRKFLWTSKCOMPLETIONUTCDATETIME sy-vline 
WA_IEHSTASKINST_STR-EHSTASKSTATUS sy-vline 
WA_IEHSTASKINST_STR-WORKFLOWTASKNAME sy-vline 
WA_IEHSTASKINST_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.