ABAP Select data from SAP table EHFNDW_TDEF_REF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDW_TDEF_REF
*  INTO TABLE @DATA(IT_EHFNDW_TDEF_REF2).
*--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_EHFNDW_TDEF_REF INDEX 1 INTO DATA(WA_EHFNDW_TDEF_REF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHFNDW_TDEF_REF>-MANDT = 1.
<EHFNDW_TDEF_REF>-EHSTASKDEFINITIONREFERENCEUUID = 1.
<EHFNDW_TDEF_REF>-EHSTASKDEFINITIONUUID = 1.
<EHFNDW_TDEF_REF>-EHSTASKRELATEDOBJINSTANCEUUID = 1.
<EHFNDW_TDEF_REF>-EHSTASKRELATEDOBJADAPTERCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDW_TDEF_REF-ACTIVEUUID, sy-vline,
  WA_EHFNDW_TDEF_REF-HASACTIVEENTITY, sy-vline,
  WA_EHFNDW_TDEF_REF-DRAFTENTITYCREATIONDATETIME, sy-vline,
  WA_EHFNDW_TDEF_REF-DRAFTENTITYLASTCHANGEDATETIME, sy-vline,
  WA_EHFNDW_TDEF_REF-DRAFTADMINISTRATIVEDATAUUID, sy-vline,
  WA_EHFNDW_TDEF_REF-DRAFTENTITYCONSISTENCYSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDW_TDEF_REF 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_EHFNDW_TDEF_REF 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_EHFNDW_TDEF_REF INTO WA_EHFNDW_TDEF_REF.


*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_EHFNDW_TDEF_REF_STR, 
MANDT TYPE STRING,
EHSTASKDEFINITIONREFERENCEUUID TYPE STRING,
EHSTASKDEFINITIONUUID TYPE STRING,
EHSTASKRELATEDOBJINSTANCEUUID TYPE STRING,
EHSTASKRELATEDOBJADAPTERCLASS TYPE STRING,
ACTIVEUUID TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDW_TDEF_REF_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_EHFNDW_TDEF_REF_STR-MANDT sy-vline 
WA_EHFNDW_TDEF_REF_STR-EHSTASKDEFINITIONREFERENCEUUID sy-vline 
WA_EHFNDW_TDEF_REF_STR-EHSTASKDEFINITIONUUID sy-vline 
WA_EHFNDW_TDEF_REF_STR-EHSTASKRELATEDOBJINSTANCEUUID sy-vline 
WA_EHFNDW_TDEF_REF_STR-EHSTASKRELATEDOBJADAPTERCLASS sy-vline 
WA_EHFNDW_TDEF_REF_STR-ACTIVEUUID sy-vline 
WA_EHFNDW_TDEF_REF_STR-HASACTIVEENTITY sy-vline 
WA_EHFNDW_TDEF_REF_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_EHFNDW_TDEF_REF_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_EHFNDW_TDEF_REF_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_EHFNDW_TDEF_REF_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_EHFNDW_TDEF_REF_STR-DRAFTENTITYOPERATIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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