ABAP Select data from SAP table /ACCGO/CMN_S_CHARACTERSTIC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ACCGO/CMN_S_CHARACTERSTIC 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 /ACCGO/CMN_S_CHARACTERSTIC. 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 /ACCGO/CMN_S_CHARACTERSTIC 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_/ACCGO/CMN_S_CHARACTERSTIC TYPE STANDARD TABLE OF /ACCGO/CMN_S_CHARACTERSTIC,
      WA_/ACCGO/CMN_S_CHARACTERSTIC TYPE /ACCGO/CMN_S_CHARACTERSTIC,
      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: </ACCGO/CMN_S_CHARACTERSTIC> TYPE /ACCGO/CMN_S_CHARACTERSTIC.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ACCGO/CMN_S_CHARACTERSTIC
  INTO TABLE IT_/ACCGO/CMN_S_CHARACTERSTIC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ACCGO/CMN_S_CHARACTERSTIC
*  INTO TABLE @DATA(IT_/ACCGO/CMN_S_CHARACTERSTIC2).
*--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_/ACCGO/CMN_S_CHARACTERSTIC INDEX 1 INTO DATA(WA_/ACCGO/CMN_S_CHARACTERSTIC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ACCGO/CMN_S_CHARACTERSTIC ASSIGNING </ACCGO/CMN_S_CHARACTERSTIC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ACCGO/CMN_S_CHARACTERSTIC>-SEQUENCE = 1.
</ACCGO/CMN_S_CHARACTERSTIC>-CSTIC_ID = 1.
</ACCGO/CMN_S_CHARACTERSTIC>-APPLIES_TO = 1.
</ACCGO/CMN_S_CHARACTERSTIC>-CSTICS_VAL_TYPE = 1.
</ACCGO/CMN_S_CHARACTERSTIC>-NO_OF_CHARS = 1.

ENDLOOP.

LOOP AT IT_/ACCGO/CMN_S_CHARACTERSTIC INTO WA_/ACCGO/CMN_S_CHARACTERSTIC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ACCGO/CMN_S_CHARACTERSTIC-CSTIC_NO_OF_DEC, sy-vline,
  WA_/ACCGO/CMN_S_CHARACTERSTIC-CHAR_VAL_FROM, sy-vline,
  WA_/ACCGO/CMN_S_CHARACTERSTIC-CHARVAL_TO, sy-vline,
  WA_/ACCGO/CMN_S_CHARACTERSTIC-CHAR_UOM, sy-vline,
  WA_/ACCGO/CMN_S_CHARACTERSTIC-CHAR_AVAL_VALUES, sy-vline,
  WA_/ACCGO/CMN_S_CHARACTERSTIC-CHAR_NAME_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ACCGO/CMN_S_CHARACTERSTIC 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_/ACCGO/CMN_S_CHARACTERSTIC 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_/ACCGO/CMN_S_CHARACTERSTIC INTO WA_/ACCGO/CMN_S_CHARACTERSTIC.


*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_/ACCGO/CMN_S_CHARACTERSTIC_STR, 
SEQUENCE TYPE STRING,
CSTIC_ID TYPE STRING,
APPLIES_TO TYPE STRING,
CSTICS_VAL_TYPE TYPE STRING,
NO_OF_CHARS TYPE STRING,
CSTIC_NO_OF_DEC TYPE STRING,
CHAR_VAL_FROM TYPE STRING,
CHARVAL_TO TYPE STRING,
CHAR_UOM TYPE STRING,
CHAR_AVAL_VALUES TYPE STRING,
CHAR_NAME_TEXT TYPE STRING,
GOVERNING_ANALYSIS TYPE STRING,
RATE_TYPE TYPE STRING,
PER_UNIT TYPE STRING,
QUANT_TYPE TYPE STRING,
PRICE_TYPE TYPE STRING,
AVG_METHOD TYPE STRING,
CALC_METHOD TYPE STRING,
ROUNDING_DIRCTN TYPE STRING,
ANALYSIS_REQ TYPE STRING,
COMMENTS TYPE STRING,
DERIVED_RULE TYPE STRING,
CALC_RULE TYPE STRING,
DERIEVED_FRM_CSTICS TYPE STRING,
CONFIRM_PRNT TYPE STRING,
STOP_APPL_FLAG TYPE STRING,
STOP_SETTLM_FLAG TYPE STRING,
CSTICS_RANGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ACCGO/CMN_S_CHARACTERSTIC_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_/ACCGO/CMN_S_CHARACTERSTIC_STR-SEQUENCE sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CSTIC_ID sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-APPLIES_TO sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CSTICS_VAL_TYPE sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-NO_OF_CHARS sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CSTIC_NO_OF_DEC sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CHAR_VAL_FROM sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CHARVAL_TO sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CHAR_UOM sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CHAR_AVAL_VALUES sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CHAR_NAME_TEXT sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-GOVERNING_ANALYSIS sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-RATE_TYPE sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-PER_UNIT sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-QUANT_TYPE sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-PRICE_TYPE sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-AVG_METHOD sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CALC_METHOD sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-ROUNDING_DIRCTN sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-ANALYSIS_REQ sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-COMMENTS sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-DERIVED_RULE sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CALC_RULE sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-DERIEVED_FRM_CSTICS sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CONFIRM_PRNT sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-STOP_APPL_FLAG sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-STOP_SETTLM_FLAG sy-vline 
WA_/ACCGO/CMN_S_CHARACTERSTIC_STR-CSTICS_RANGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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