ABAP Select data from SAP table ENH_UTIL_DD_STRU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENH_UTIL_DD_STRU
*  INTO TABLE @DATA(IT_ENH_UTIL_DD_STRU2).
*--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_ENH_UTIL_DD_STRU INDEX 1 INTO DATA(WA_ENH_UTIL_DD_STRU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENH_UTIL_DD_STRU>-TABIX = 1.
<ENH_UTIL_DD_STRU>-STUFE = 1.
<ENH_UTIL_DD_STRU>-UEPOS = 1.
<ENH_UTIL_DD_STRU>-AUFGELOEST = 1.
<ENH_UTIL_DD_STRU>-COMP_TAB_IX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENH_UTIL_DD_STRU-TABNAME_UE, sy-vline,
  WA_ENH_UTIL_DD_STRU-FIELDNAME_UE, sy-vline,
  WA_ENH_UTIL_DD_STRU-ROLLNAME_UE, sy-vline,
  WA_ENH_UTIL_DD_STRU-TABNAME, sy-vline,
  WA_ENH_UTIL_DD_STRU-POSITION, sy-vline,
  WA_ENH_UTIL_DD_STRU-FIELDNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENH_UTIL_DD_STRU 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_ENH_UTIL_DD_STRU 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_ENH_UTIL_DD_STRU INTO WA_ENH_UTIL_DD_STRU.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_ENH_UTIL_DD_STRU-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENH_UTIL_DD_STRU-DATATYPE.
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_ENH_UTIL_DD_STRU_STR, 
TABIX TYPE STRING,
STUFE TYPE STRING,
UEPOS TYPE STRING,
AUFGELOEST TYPE STRING,
COMP_TAB_IX TYPE STRING,
TABNAME_UE TYPE STRING,
FIELDNAME_UE TYPE STRING,
ROLLNAME_UE TYPE STRING,
TABNAME TYPE STRING,
POSITION TYPE STRING,
FIELDNAME TYPE STRING,
ROLLNAME TYPE STRING,
INTTYPE TYPE STRING,
INTLEN TYPE STRING,
DATATYPE TYPE STRING,
DEPTH TYPE STRING,
OWNTYPE TYPE STRING,
OWNLEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENH_UTIL_DD_STRU_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_ENH_UTIL_DD_STRU_STR-TABIX sy-vline 
WA_ENH_UTIL_DD_STRU_STR-STUFE sy-vline 
WA_ENH_UTIL_DD_STRU_STR-UEPOS sy-vline 
WA_ENH_UTIL_DD_STRU_STR-AUFGELOEST sy-vline 
WA_ENH_UTIL_DD_STRU_STR-COMP_TAB_IX sy-vline 
WA_ENH_UTIL_DD_STRU_STR-TABNAME_UE sy-vline 
WA_ENH_UTIL_DD_STRU_STR-FIELDNAME_UE sy-vline 
WA_ENH_UTIL_DD_STRU_STR-ROLLNAME_UE sy-vline 
WA_ENH_UTIL_DD_STRU_STR-TABNAME sy-vline 
WA_ENH_UTIL_DD_STRU_STR-POSITION sy-vline 
WA_ENH_UTIL_DD_STRU_STR-FIELDNAME sy-vline 
WA_ENH_UTIL_DD_STRU_STR-ROLLNAME sy-vline 
WA_ENH_UTIL_DD_STRU_STR-INTTYPE sy-vline 
WA_ENH_UTIL_DD_STRU_STR-INTLEN sy-vline 
WA_ENH_UTIL_DD_STRU_STR-DATATYPE sy-vline 
WA_ENH_UTIL_DD_STRU_STR-DEPTH sy-vline 
WA_ENH_UTIL_DD_STRU_STR-OWNTYPE sy-vline 
WA_ENH_UTIL_DD_STRU_STR-OWNLEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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