ABAP Select data from SAP table NGCS_CORE_CLASS 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 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. 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 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 STANDARD TABLE OF NGCS_CORE_CLASS,
      WA_NGCS_CORE_CLASS TYPE NGCS_CORE_CLASS,
      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 NGCS_CORE_CLASS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NGCS_CORE_CLASS
*  INTO TABLE @DATA(IT_NGCS_CORE_CLASS2).
*--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 INDEX 1 INTO DATA(WA_NGCS_CORE_CLASS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NGCS_CORE_CLASS>-CLASSINTERNALID = 1.
<NGCS_CORE_CLASS>-KEY_DATE = 1.
<NGCS_CORE_CLASS>-CLASSTYPE = 1.
<NGCS_CORE_CLASS>-CLASS = 1.
<NGCS_CORE_CLASS>-CLASSSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NGCS_CORE_CLASS-CLASSGROUP, sy-vline,
  WA_NGCS_CORE_CLASS-CLASSSEARCHAUTHGRP, sy-vline,
  WA_NGCS_CORE_CLASS-CLASSCLASSFCTNAUTHGRP, sy-vline,
  WA_NGCS_CORE_CLASS-CLASSMAINTAUTHGRP, sy-vline,
  WA_NGCS_CORE_CLASS-DOCUMENTINFORECORDDOCNUMBER, sy-vline,
  WA_NGCS_CORE_CLASS-DOCUMENTINFORECORDDOCTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NGCS_CORE_CLASS 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 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 INTO WA_NGCS_CORE_CLASS.


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

*Conversion exit CUNIT, internal->external for field CLASSBASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_NGCS_CORE_CLASS-CLASSBASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS-CLASSBASEUNIT.
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_STR, 
CLASSINTERNALID TYPE STRING,
KEY_DATE TYPE STRING,
CLASSTYPE TYPE STRING,
CLASS TYPE STRING,
CLASSSTATUS TYPE STRING,
CLASSGROUP TYPE STRING,
CLASSSEARCHAUTHGRP TYPE STRING,
CLASSCLASSFCTNAUTHGRP TYPE STRING,
CLASSMAINTAUTHGRP TYPE STRING,
DOCUMENTINFORECORDDOCNUMBER TYPE STRING,
DOCUMENTINFORECORDDOCTYPE TYPE STRING,
DOCUMENTINFORECORDDOCPART TYPE STRING,
DOCUMENTINFORECORDDOCVERSION TYPE STRING,
SAMECLASSFCTNREACTION TYPE STRING,
CLFNORGANIZATIONALAREA TYPE STRING,
CLASSSTANDARDORGNAME TYPE STRING,
CLASSSTANDARDNUMBER TYPE STRING,
CLASSSTANDARDSTARTDATE TYPE STRING,
CLASSSTANDARDVERSIONSTARTDATE TYPE STRING,
CLASSSTANDARDVERSION TYPE STRING,
CLASSSTANDARDCHARCTABLE TYPE STRING,
CLASSBASEUNIT TYPE STRING,
CLASSISUSABLEINBOM TYPE STRING,
CLASSISLOCAL TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CLASSTEXT TYPE STRING,
CLASSDESCRIPTION TYPE STRING,
CLASSSTATUSNAME TYPE STRING,
CLASSIFICATIONISALLOWED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NGCS_CORE_CLASS_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_STR-CLASSINTERNALID sy-vline 
WA_NGCS_CORE_CLASS_STR-KEY_DATE sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSTYPE sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASS sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTATUS sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSGROUP sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSEARCHAUTHGRP sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSCLASSFCTNAUTHGRP sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSMAINTAUTHGRP sy-vline 
WA_NGCS_CORE_CLASS_STR-DOCUMENTINFORECORDDOCNUMBER sy-vline 
WA_NGCS_CORE_CLASS_STR-DOCUMENTINFORECORDDOCTYPE sy-vline 
WA_NGCS_CORE_CLASS_STR-DOCUMENTINFORECORDDOCPART sy-vline 
WA_NGCS_CORE_CLASS_STR-DOCUMENTINFORECORDDOCVERSION sy-vline 
WA_NGCS_CORE_CLASS_STR-SAMECLASSFCTNREACTION sy-vline 
WA_NGCS_CORE_CLASS_STR-CLFNORGANIZATIONALAREA sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTANDARDORGNAME sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTANDARDNUMBER sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTANDARDSTARTDATE sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTANDARDVERSIONSTARTDATE sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTANDARDVERSION sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTANDARDCHARCTABLE sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSBASEUNIT sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSISUSABLEINBOM sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSISLOCAL sy-vline 
WA_NGCS_CORE_CLASS_STR-VALIDITYSTARTDATE sy-vline 
WA_NGCS_CORE_CLASS_STR-VALIDITYENDDATE sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSTEXT sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSDESCRIPTION sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSSTATUSNAME sy-vline 
WA_NGCS_CORE_CLASS_STR-CLASSIFICATIONISALLOWED sy-vline      INTO ld_text SEPARATED BY SPACE.

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