ABAP Select data from SAP table CLES_S_ND_CLASS_PROPERTY_ASSIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLES_S_ND_CLASS_PROPERTY_ASSIG
*  INTO TABLE @DATA(IT_CLES_S_ND_CLASS_PROPERTY_ASSIG2).
*--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_CLES_S_ND_CLASS_PROPERTY_ASSIG INDEX 1 INTO DATA(WA_CLES_S_ND_CLASS_PROPERTY_ASSIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLES_S_ND_CLASS_PROPERTY_ASSIG>-CLINT = 1.
<CLES_S_ND_CLASS_PROPERTY_ASSIG>-PROPERTY_UUID = 1.
<CLES_S_ND_CLASS_PROPERTY_ASSIG>-CHANGE_ORDER_ID = 1.
<CLES_S_ND_CLASS_PROPERTY_ASSIG>-VALID_FROM = 1.
<CLES_S_ND_CLASS_PROPERTY_ASSIG>-VALID_TO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLES_S_ND_CLASS_PROPERTY_ASSIG-HAS_PARAMETER_EFFECTIVITY, sy-vline,
  WA_CLES_S_ND_CLASS_PROPERTY_ASSIG-IS_ORIGINAL, sy-vline,
  WA_CLES_S_ND_CLASS_PROPERTY_ASSIG-ORIGINAL_PROPERTY_UUID, sy-vline,
  WA_CLES_S_ND_CLASS_PROPERTY_ASSIG-POSNR, sy-vline,
  WA_CLES_S_ND_CLASS_PROPERTY_ASSIG-RELEV, sy-vline,
  WA_CLES_S_ND_CLASS_PROPERTY_ASSIG-VMERK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLES_S_ND_CLASS_PROPERTY_ASSIG 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_CLES_S_ND_CLASS_PROPERTY_ASSIG 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_CLES_S_ND_CLASS_PROPERTY_ASSIG INTO WA_CLES_S_ND_CLASS_PROPERTY_ASSIG.


*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_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR, 
CLINT TYPE STRING,
PROPERTY_UUID TYPE STRING,
CHANGE_ORDER_ID TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
HAS_PARAMETER_EFFECTIVITY TYPE STRING,
IS_ORIGINAL TYPE STRING,
ORIGINAL_PROPERTY_UUID TYPE STRING,
POSNR TYPE STRING,
RELEV TYPE STRING,
VMERK TYPE STRING,
DPLEN TYPE STRING,
OFFST TYPE STRING,
BLLIN TYPE STRING,
DPTXT TYPE STRING,
CUSTR TYPE STRING,
JUSTR TYPE STRING,
COLOR TYPE STRING,
INTSF TYPE STRING,
INVER TYPE STRING,
CKBOX TYPE STRING,
INPUT TYPE STRING,
AMERK TYPE STRING,
MKENN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_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_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-CLINT sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-PROPERTY_UUID sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-CHANGE_ORDER_ID sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-VALID_FROM sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-VALID_TO sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-HAS_PARAMETER_EFFECTIVITY sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-IS_ORIGINAL sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-ORIGINAL_PROPERTY_UUID sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-POSNR sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-RELEV sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-VMERK sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-DPLEN sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-OFFST sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-BLLIN sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-DPTXT sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-CUSTR sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-JUSTR sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-COLOR sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-INTSF sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-INVER sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-CKBOX sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-INPUT sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-AMERK sy-vline 
WA_CLES_S_ND_CLASS_PROPERTY_ASSIG_STR-MKENN sy-vline      INTO ld_text SEPARATED BY SPACE.

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