ABAP Select data from SAP table NGCS_CORE_CLASS_CHARACTERISTIC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP NGCS_CORE_CLASS_CHARACTERISTIC 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_CHARACTERISTIC. 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_CHARACTERISTIC 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_CHARACTERISTIC TYPE STANDARD TABLE OF NGCS_CORE_CLASS_CHARACTERISTIC,
      WA_NGCS_CORE_CLASS_CHARACTERISTIC TYPE NGCS_CORE_CLASS_CHARACTERISTIC,
      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_CHARACTERISTIC> TYPE NGCS_CORE_CLASS_CHARACTERISTIC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NGCS_CORE_CLASS_CHARACTERISTIC
*  INTO TABLE @DATA(IT_NGCS_CORE_CLASS_CHARACTERISTIC2).
*--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_CHARACTERISTIC INDEX 1 INTO DATA(WA_NGCS_CORE_CLASS_CHARACTERISTIC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NGCS_CORE_CLASS_CHARACTERISTIC>-CLASSINTERNALID = 1.
<NGCS_CORE_CLASS_CHARACTERISTIC>-CHARCINTERNALID = 1.
<NGCS_CORE_CLASS_CHARACTERISTIC>-KEY_DATE = 1.
<NGCS_CORE_CLASS_CHARACTERISTIC>-CLFNORGANIZATIONALAREA = 1.
<NGCS_CORE_CLASS_CHARACTERISTIC>-CLASSTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NGCS_CORE_CLASS_CHARACTERISTIC-TIMEINTERVALNUMBER, sy-vline,
  WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARACTERISTIC, sy-vline,
  WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCSTATUS, sy-vline,
  WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCDATATYPE, sy-vline,
  WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCLENGTH, sy-vline,
  WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCDECIMALS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NGCS_CORE_CLASS_CHARACTERISTIC 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_CHARACTERISTIC 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_CHARACTERISTIC INTO WA_NGCS_CORE_CLASS_CHARACTERISTIC.


*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 ATINN, internal->external for field CHARCINTERNALID
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCINTERNALID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CHARCVALUEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCVALUEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHARCVALUEUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARACTERISTIC-CHANGENUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCUMENTINFORECORDDOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NGCS_CORE_CLASS_CHARACTERISTIC-DOCUMENTINFORECORDDOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARACTERISTIC-DOCUMENTINFORECORDDOCNUMBER.
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_CHARACTERISTIC_STR, 
CLASSINTERNALID TYPE STRING,
CHARCINTERNALID TYPE STRING,
KEY_DATE TYPE STRING,
CLFNORGANIZATIONALAREA TYPE STRING,
CLASSTYPE TYPE STRING,
TIMEINTERVALNUMBER TYPE STRING,
CHARACTERISTIC TYPE STRING,
CHARCSTATUS TYPE STRING,
CHARCDATATYPE TYPE STRING,
CHARCLENGTH TYPE STRING,
CHARCDECIMALS TYPE STRING,
CHARCTEMPLATE TYPE STRING,
VALUEISCASESENSITIVE TYPE STRING,
CHARCCONVERSIONROUTINE TYPE STRING,
CHARCISAGGREGATING TYPE STRING,
CHARCGROUP TYPE STRING,
ENTRYISREQUIRED TYPE STRING,
MULTIPLEVALUESAREALLOWED TYPE STRING,
CHARCVALUEUNIT TYPE STRING,
CHARCEXPONENTVALUE TYPE STRING,
VALUEINTERVALISALLOWED TYPE STRING,
ADDITIONALVALUEISALLOWED TYPE STRING,
NEGATIVEVALUEISALLOWED TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CHANGENUMBER TYPE STRING,
ISMARKEDFORDELETION TYPE STRING,
DOCUMENTINFORECORDDOCTYPE TYPE STRING,
DOCUMENTINFORECORDDOCNUMBER TYPE STRING,
DOCUMENTINFORECORDDOCPART TYPE STRING,
DOCUMENTINFORECORDDOCVERSION TYPE STRING,
CHARCMAINTAUTHGRP TYPE STRING,
CHARCISREADONLY TYPE STRING,
CHARCISHIDDEN TYPE STRING,
CHARCREFERENCETABLE TYPE STRING,
CHARCREFERENCETABLEFIELD TYPE STRING,
CHARCCHECKTABLE TYPE STRING,
CHARCCHECKFUNCTIONMODULE TYPE STRING,
CHARCEXPONENTFORMAT TYPE STRING,
CHARCENTRYISNOTFORMATCTRLD TYPE STRING,
CHARCTEMPLATEISDISPLAYED TYPE STRING,
CHARCSELECTEDSET TYPE STRING,
PLANT TYPE STRING,
CHARCCATALOGTYPE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
CHARCDESCRIPTION TYPE STRING,
CHARCSTATUSNAME TYPE STRING,
UNITOFMEASURENAME TYPE STRING,
CHARCGROUPNAME TYPE STRING,
CURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NGCS_CORE_CLASS_CHARACTERISTIC_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_CHARACTERISTIC_STR-CLASSINTERNALID sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCINTERNALID sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-KEY_DATE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CLFNORGANIZATIONALAREA sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CLASSTYPE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-TIMEINTERVALNUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARACTERISTIC sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCSTATUS sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCDATATYPE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCLENGTH sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCDECIMALS sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCTEMPLATE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-VALUEISCASESENSITIVE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCCONVERSIONROUTINE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCISAGGREGATING sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCGROUP sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-ENTRYISREQUIRED sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-MULTIPLEVALUESAREALLOWED sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCVALUEUNIT sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCEXPONENTVALUE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-VALUEINTERVALISALLOWED sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-ADDITIONALVALUEISALLOWED sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-NEGATIVEVALUEISALLOWED sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-VALIDITYSTARTDATE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-VALIDITYENDDATE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHANGENUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-ISMARKEDFORDELETION sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-DOCUMENTINFORECORDDOCTYPE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-DOCUMENTINFORECORDDOCNUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-DOCUMENTINFORECORDDOCPART sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-DOCUMENTINFORECORDDOCVERSION sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCMAINTAUTHGRP sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCISREADONLY sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCISHIDDEN sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCREFERENCETABLE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCREFERENCETABLEFIELD sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCCHECKTABLE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCCHECKFUNCTIONMODULE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCEXPONENTFORMAT sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCENTRYISNOTFORMATCTRLD sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCTEMPLATEISDISPLAYED sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCSELECTEDSET sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-PLANT sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCCATALOGTYPE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CREATEDBYUSER sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CREATIONDATE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-LASTCHANGEDBYUSER sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-LASTCHANGEDATE sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCDESCRIPTION sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCSTATUSNAME sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-UNITOFMEASURENAME sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CHARCGROUPNAME sy-vline 
WA_NGCS_CORE_CLASS_CHARACTERISTIC_STR-CURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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