ABAP Select data from SAP table NGCS_CORE_CLASS_CHARC_VALUE 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_CHARC_VALUE 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_CHARC_VALUE. 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_CHARC_VALUE 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_CHARC_VALUE TYPE STANDARD TABLE OF NGCS_CORE_CLASS_CHARC_VALUE,
      WA_NGCS_CORE_CLASS_CHARC_VALUE TYPE NGCS_CORE_CLASS_CHARC_VALUE,
      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_CHARC_VALUE> TYPE NGCS_CORE_CLASS_CHARC_VALUE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NGCS_CORE_CLASS_CHARC_VALUE
*  INTO TABLE @DATA(IT_NGCS_CORE_CLASS_CHARC_VALUE2).
*--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_CHARC_VALUE INDEX 1 INTO DATA(WA_NGCS_CORE_CLASS_CHARC_VALUE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NGCS_CORE_CLASS_CHARC_VALUE>-CLASSINTERNALID = 1.
<NGCS_CORE_CLASS_CHARC_VALUE>-CHARCINTERNALID = 1.
<NGCS_CORE_CLASS_CHARC_VALUE>-KEY_DATE = 1.
<NGCS_CORE_CLASS_CHARC_VALUE>-CHARCVALUEPOSITIONNUMBER = 1.
<NGCS_CORE_CLASS_CHARC_VALUE>-TIMEINTERVALNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCVALUEPARENTPOSITIONNUMBER, sy-vline,
  WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCVALUEHASCHILD, sy-vline,
  WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCVALUEDEPENDENCY, sy-vline,
  WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCVALUE, sy-vline,
  WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCFROMNUMERICVALUE, sy-vline,
  WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCTONUMERICVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NGCS_CORE_CLASS_CHARC_VALUE 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_CHARC_VALUE 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_CHARC_VALUE INTO WA_NGCS_CORE_CLASS_CHARC_VALUE.


*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_CHARC_VALUE-CHARCINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCINTERNALID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field CHARCTONUMERICVALUEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCTONUMERICVALUEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARC_VALUE-CHARCTONUMERICVALUEUNIT.
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_CHARC_VALUE-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARC_VALUE-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_CHARC_VALUE-DOCUMENTINFORECORDDOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NGCS_CORE_CLASS_CHARC_VALUE-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_CHARC_VALUE_STR, 
CLASSINTERNALID TYPE STRING,
CHARCINTERNALID TYPE STRING,
KEY_DATE TYPE STRING,
CHARCVALUEPOSITIONNUMBER TYPE STRING,
TIMEINTERVALNUMBER TYPE STRING,
CHARCVALUEPARENTPOSITIONNUMBER TYPE STRING,
CHARCVALUEHASCHILD TYPE STRING,
CHARCVALUEDEPENDENCY TYPE STRING,
CHARCVALUE TYPE STRING,
CHARCFROMNUMERICVALUE TYPE STRING,
CHARCTONUMERICVALUE TYPE STRING,
ISDEFAULTVALUE TYPE STRING,
CHARCFROMNUMERICVALUEUNIT TYPE STRING,
CHARCTONUMERICVALUEUNIT TYPE STRING,
LONGTEXTID TYPE STRING,
CHANGENUMBER TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
ISMARKEDFORDELETION TYPE STRING,
DOCUMENTINFORECORDDOCTYPE TYPE STRING,
DOCUMENTINFORECORDDOCNUMBER TYPE STRING,
DOCUMENTINFORECORDDOCPART TYPE STRING,
DOCUMENTINFORECORDDOCVERSION TYPE STRING,
CHARCVALUEDESCRIPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NGCS_CORE_CLASS_CHARC_VALUE_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_CHARC_VALUE_STR-CLASSINTERNALID sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCINTERNALID sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-KEY_DATE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCVALUEPOSITIONNUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-TIMEINTERVALNUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCVALUEPARENTPOSITIONNUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCVALUEHASCHILD sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCVALUEDEPENDENCY sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCVALUE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCFROMNUMERICVALUE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCTONUMERICVALUE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-ISDEFAULTVALUE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCFROMNUMERICVALUEUNIT sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCTONUMERICVALUEUNIT sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-LONGTEXTID sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHANGENUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-VALIDITYSTARTDATE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-VALIDITYENDDATE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-ISMARKEDFORDELETION sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-DOCUMENTINFORECORDDOCTYPE sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-DOCUMENTINFORECORDDOCNUMBER sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-DOCUMENTINFORECORDDOCPART sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-DOCUMENTINFORECORDDOCVERSION sy-vline 
WA_NGCS_CORE_CLASS_CHARC_VALUE_STR-CHARCVALUEDESCRIPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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