ABAP Select data from SAP table IHIERARCHYLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IHIERARCHYLIST
*  INTO TABLE @DATA(IT_IHIERARCHYLIST2).
*--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_IHIERARCHYLIST INDEX 1 INTO DATA(WA_IHIERARCHYLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IHIERARCHYLIST>-MANDT = 1.
<IHIERARCHYLIST>-MASTERPROJECTUUID = 1.
<IHIERARCHYLIST>-MASTERPROJECT = 1.
<IHIERARCHYLIST>-MASTERPROJECTNAME = 1.
<IHIERARCHYLIST>-MASTERPROJECTORGANIZATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IHIERARCHYLIST-MASTERPROJECTISCONFIDENTIAL, sy-vline,
  WA_IHIERARCHYLIST-MASTERPROJECTTYPE, sy-vline,
  WA_IHIERARCHYLIST-CURRENCY, sy-vline,
  WA_IHIERARCHYLIST-PROJECT, sy-vline,
  WA_IHIERARCHYLIST-PROJECTDESCRIPTION, sy-vline,
  WA_IHIERARCHYLIST-BUSINESSAREA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IHIERARCHYLIST 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_IHIERARCHYLIST 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_IHIERARCHYLIST INTO WA_IHIERARCHYLIST.


*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 ABPSN, internal->external for field PROJECT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_IHIERARCHYLIST-PROJECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IHIERARCHYLIST-PROJECT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSN, internal->external for field WBSELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_IHIERARCHYLIST-WBSELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IHIERARCHYLIST-WBSELEMENT.
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_IHIERARCHYLIST_STR, 
MANDT TYPE STRING,
MASTERPROJECTUUID TYPE STRING,
MASTERPROJECT TYPE STRING,
MASTERPROJECTNAME TYPE STRING,
MASTERPROJECTORGANIZATION TYPE STRING,
MASTERPROJECTISCONFIDENTIAL TYPE STRING,
MASTERPROJECTTYPE TYPE STRING,
CURRENCY TYPE STRING,
PROJECT TYPE STRING,
PROJECTDESCRIPTION TYPE STRING,
BUSINESSAREA TYPE STRING,
COMPANYCODE TYPE STRING,
CONTROLLINGAREA TYPE STRING,
CONTROLLINGOBJECT TYPE STRING,
CONTROLLINGOBJECTEXTERNALID TYPE STRING,
CONTROLLINGOBJECTTYPE TYPE STRING,
SALESDOCUMENT TYPE STRING,
SALESDOCUMENTITEM TYPE STRING,
OBJECTNAME TYPE STRING,
MSTRPROJANCHOROBJECTINTERNALID TYPE STRING,
EXTERNALOBJECTIDENTIFIER TYPE STRING,
MSTRPROJCUTOFFDATE TYPE STRING,
CONTROLLINGOBJECTCURRENCY TYPE STRING,
WBSELEMENTOBJECT TYPE STRING,
WBSELEMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IHIERARCHYLIST_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_IHIERARCHYLIST_STR-MANDT sy-vline 
WA_IHIERARCHYLIST_STR-MASTERPROJECTUUID sy-vline 
WA_IHIERARCHYLIST_STR-MASTERPROJECT sy-vline 
WA_IHIERARCHYLIST_STR-MASTERPROJECTNAME sy-vline 
WA_IHIERARCHYLIST_STR-MASTERPROJECTORGANIZATION sy-vline 
WA_IHIERARCHYLIST_STR-MASTERPROJECTISCONFIDENTIAL sy-vline 
WA_IHIERARCHYLIST_STR-MASTERPROJECTTYPE sy-vline 
WA_IHIERARCHYLIST_STR-CURRENCY sy-vline 
WA_IHIERARCHYLIST_STR-PROJECT sy-vline 
WA_IHIERARCHYLIST_STR-PROJECTDESCRIPTION sy-vline 
WA_IHIERARCHYLIST_STR-BUSINESSAREA sy-vline 
WA_IHIERARCHYLIST_STR-COMPANYCODE sy-vline 
WA_IHIERARCHYLIST_STR-CONTROLLINGAREA sy-vline 
WA_IHIERARCHYLIST_STR-CONTROLLINGOBJECT sy-vline 
WA_IHIERARCHYLIST_STR-CONTROLLINGOBJECTEXTERNALID sy-vline 
WA_IHIERARCHYLIST_STR-CONTROLLINGOBJECTTYPE sy-vline 
WA_IHIERARCHYLIST_STR-SALESDOCUMENT sy-vline 
WA_IHIERARCHYLIST_STR-SALESDOCUMENTITEM sy-vline 
WA_IHIERARCHYLIST_STR-OBJECTNAME sy-vline 
WA_IHIERARCHYLIST_STR-MSTRPROJANCHOROBJECTINTERNALID sy-vline 
WA_IHIERARCHYLIST_STR-EXTERNALOBJECTIDENTIFIER sy-vline 
WA_IHIERARCHYLIST_STR-MSTRPROJCUTOFFDATE sy-vline 
WA_IHIERARCHYLIST_STR-CONTROLLINGOBJECTCURRENCY sy-vline 
WA_IHIERARCHYLIST_STR-WBSELEMENTOBJECT sy-vline 
WA_IHIERARCHYLIST_STR-WBSELEMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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