ABAP Select data from SAP table NGCS_CORE_CLASS_TYPE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NGCS_CORE_CLASS_TYPE
*  INTO TABLE @DATA(IT_NGCS_CORE_CLASS_TYPE2).
*--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_NGCS_CORE_CLASS_TYPE INDEX 1 INTO DATA(WA_NGCS_CORE_CLASS_TYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NGCS_CORE_CLASS_TYPE>-CLASSTYPE = 1.
<NGCS_CORE_CLASS_TYPE>-CLFNOBJECTTABLE = 1.
<NGCS_CORE_CLASS_TYPE>-LANGUAGE = 1.
<NGCS_CORE_CLASS_TYPE>-CLASSTYPENAME = 1.
<NGCS_CORE_CLASS_TYPE>-MULTIPLEOBJTABLECLFNISALLOWED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NGCS_CORE_CLASS_TYPE-ENGCHANGEMGMTISALLOWED, sy-vline,
  WA_NGCS_CORE_CLASS_TYPE-MULTIPLECLASSISALLOWED, sy-vline,
  WA_NGCS_CORE_CLASS_TYPE-CLFNNEWNUMBERINGISALLOWED, sy-vline,
  WA_NGCS_CORE_CLASS_TYPE-CLFNOBJECTHIERARCHYLEVEL, sy-vline,
  WA_NGCS_CORE_CLASS_TYPE-CLASSTYPEISUSABLEINVARCONFIGN, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_NGCS_CORE_CLASS_TYPE 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_NGCS_CORE_CLASS_TYPE 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_NGCS_CORE_CLASS_TYPE INTO WA_NGCS_CORE_CLASS_TYPE.


*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 LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_NGCS_CORE_CLASS_TYPE-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_TYPE-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_NGCS_CORE_CLASS_TYPE_STR, 
CLASSTYPE TYPE STRING,
CLFNOBJECTTABLE TYPE STRING,
LANGUAGE TYPE STRING,
CLASSTYPENAME TYPE STRING,
MULTIPLEOBJTABLECLFNISALLOWED TYPE STRING,
ENGCHANGEMGMTISALLOWED TYPE STRING,
MULTIPLECLASSISALLOWED TYPE STRING,
CLFNNEWNUMBERINGISALLOWED TYPE STRING,
CLFNOBJECTHIERARCHYLEVEL TYPE STRING,
CLASSTYPEISUSABLEINVARCONFIGN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NGCS_CORE_CLASS_TYPE_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_NGCS_CORE_CLASS_TYPE_STR-CLASSTYPE sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-CLFNOBJECTTABLE sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-LANGUAGE sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-CLASSTYPENAME sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-MULTIPLEOBJTABLECLFNISALLOWED sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-ENGCHANGEMGMTISALLOWED sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-MULTIPLECLASSISALLOWED sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-CLFNNEWNUMBERINGISALLOWED sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-CLFNOBJECTHIERARCHYLEVEL sy-vline 
WA_NGCS_CORE_CLASS_TYPE_STR-CLASSTYPEISUSABLEINVARCONFIGN sy-vline      INTO ld_text SEPARATED BY SPACE.

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