ABAP Select data from SAP table CLS_OBJECT_ATTRIBUTE_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLS_OBJECT_ATTRIBUTE_FIELDS
*  INTO TABLE @DATA(IT_CLS_OBJECT_ATTRIBUTE_FIELDS2).
*--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_CLS_OBJECT_ATTRIBUTE_FIELDS INDEX 1 INTO DATA(WA_CLS_OBJECT_ATTRIBUTE_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLS_OBJECT_ATTRIBUTE_FIELDS>-NAME = 1.
<CLS_OBJECT_ATTRIBUTE_FIELDS>-ACTIVATION_STATE = 1.
<CLS_OBJECT_ATTRIBUTE_FIELDS>-KIND = 1.
<CLS_OBJECT_ATTRIBUTE_FIELDS>-TYPE_GROUP = 1.
<CLS_OBJECT_ATTRIBUTE_FIELDS>-IS_SINGLE_VALUED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLS_OBJECT_ATTRIBUTE_FIELDS-SUB_OBJ_TREATM, sy-vline,
  WA_CLS_OBJECT_ATTRIBUTE_FIELDS-SUB_OBJ_LOWER, sy-vline,
  WA_CLS_OBJECT_ATTRIBUTE_FIELDS-MAX_LINKED_OBJS, sy-vline,
  WA_CLS_OBJECT_ATTRIBUTE_FIELDS-VISIBLE_FOR_CUST, sy-vline,
  WA_CLS_OBJECT_ATTRIBUTE_FIELDS-DEFAULT_FLAG, sy-vline,
  WA_CLS_OBJECT_ATTRIBUTE_FIELDS-DEFAULT_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLS_OBJECT_ATTRIBUTE_FIELDS 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_CLS_OBJECT_ATTRIBUTE_FIELDS 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_CLS_OBJECT_ATTRIBUTE_FIELDS INTO WA_CLS_OBJECT_ATTRIBUTE_FIELDS.


*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 ISOLA, internal->external for field MASTER_LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CLS_OBJECT_ATTRIBUTE_FIELDS-MASTER_LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLS_OBJECT_ATTRIBUTE_FIELDS-MASTER_LANGUAGE.
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_CLS_OBJECT_ATTRIBUTE_FIELDS_STR, 
NAME TYPE STRING,
ACTIVATION_STATE TYPE STRING,
KIND TYPE STRING,
TYPE_GROUP TYPE STRING,
IS_SINGLE_VALUED TYPE STRING,
SUB_OBJ_TREATM TYPE STRING,
SUB_OBJ_LOWER TYPE STRING,
MAX_LINKED_OBJS TYPE STRING,
VISIBLE_FOR_CUST TYPE STRING,
DEFAULT_FLAG TYPE STRING,
DEFAULT_VALUE TYPE STRING,
VALUE_TABLE TYPE STRING,
VTABLE_FIELD TYPE STRING,
VTABLE_ICON_F TYPE STRING,
VTEXT_TABLE TYPE STRING,
VTEXT_LANGU_F TYPE STRING,
VTEXT_VALUE_F TYPE STRING,
VTEXT_TEXT_F TYPE STRING,
OBJS_OF_TYPEGR TYPE STRING,
OBJS_W_SUBTYPE TYPE STRING,
EXISTING_OBJECTS TYPE STRING,
ARBTRY_VAL_TYPE TYPE STRING,
ASSIGNMENT_DEVC TYPE STRING,
HIDE_REMARK TYPE STRING,
MANU_CHAG_ALLOW TYPE STRING,
IMPLICIT_CHANGE TYPE STRING,
AUTOMATIC_CHANGE TYPE STRING,
IS_ASPECT_FOR TYPE STRING,
ASPECT_VALUE TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_ON TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_ON TYPE STRING,
WEAK_LINKS TYPE STRING,
HIDE_ICONS TYPE STRING,
DESCRIPT TYPE STRING,
STATE_TEXT TYPE STRING,
TROBJTYPE TYPE STRING,
SOBJ_NAME TYPE STRING,
OBJECT_TYPE TYPE STRING,
SUB_KEY TYPE STRING,
MASTER_LANGUAGE TYPE STRING,
AUTHOR TYPE STRING,
PACKAGE TYPE STRING,
ENH_NAME TYPE STRING,
IMPL_NAME TYPE STRING,
CLASS_NAME TYPE STRING,
IS_DEFAULT TYPE STRING,
ENH_STATE TYPE STRING,
CLASS_STATE TYPE STRING,
IS_ASPECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLS_OBJECT_ATTRIBUTE_FIELDS_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_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-NAME sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-ACTIVATION_STATE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-KIND sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-TYPE_GROUP sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-IS_SINGLE_VALUED sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-SUB_OBJ_TREATM sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-SUB_OBJ_LOWER sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-MAX_LINKED_OBJS sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VISIBLE_FOR_CUST sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-DEFAULT_FLAG sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-DEFAULT_VALUE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VALUE_TABLE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VTABLE_FIELD sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VTABLE_ICON_F sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VTEXT_TABLE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VTEXT_LANGU_F sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VTEXT_VALUE_F sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-VTEXT_TEXT_F sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-OBJS_OF_TYPEGR sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-OBJS_W_SUBTYPE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-EXISTING_OBJECTS sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-ARBTRY_VAL_TYPE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-ASSIGNMENT_DEVC sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-HIDE_REMARK sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-MANU_CHAG_ALLOW sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-IMPLICIT_CHANGE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-AUTOMATIC_CHANGE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-IS_ASPECT_FOR sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-ASPECT_VALUE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-CREATED_BY sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-CREATED_ON sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-CHANGED_BY sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-CHANGED_ON sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-WEAK_LINKS sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-HIDE_ICONS sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-DESCRIPT sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-STATE_TEXT sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-TROBJTYPE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-SOBJ_NAME sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-OBJECT_TYPE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-SUB_KEY sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-MASTER_LANGUAGE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-AUTHOR sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-PACKAGE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-ENH_NAME sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-IMPL_NAME sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-CLASS_NAME sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-IS_DEFAULT sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-ENH_STATE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-CLASS_STATE sy-vline 
WA_CLS_OBJECT_ATTRIBUTE_FIELDS_STR-IS_ASPECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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