ABAP Select data from SAP table CHA_CLASS_DATA_VIEW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CHA_CLASS_DATA_VIEW
*  INTO TABLE @DATA(IT_CHA_CLASS_DATA_VIEW2).
*--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_CHA_CLASS_DATA_VIEW INDEX 1 INTO DATA(WA_CHA_CLASS_DATA_VIEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CHA_CLASS_DATA_VIEW>-SOLLWERT = 1.
<CHA_CLASS_DATA_VIEW>-TOLERANZOB = 1.
<CHA_CLASS_DATA_VIEW>-TOLERANZUN = 1.
<CHA_CLASS_DATA_VIEW>-TOLERWEIOB = 1.
<CHA_CLASS_DATA_VIEW>-TOLERWEIUN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CHA_CLASS_DATA_VIEW-KLASBREITE, sy-vline,
  WA_CHA_CLASS_DATA_VIEW-KLASMITTE, sy-vline,
  WA_CHA_CLASS_DATA_VIEW-GRENZEOB1, sy-vline,
  WA_CHA_CLASS_DATA_VIEW-GRENZEUN1, sy-vline,
  WA_CHA_CLASS_DATA_VIEW-GRENZEOB2, sy-vline,
  WA_CHA_CLASS_DATA_VIEW-GRENZEUN2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CHA_CLASS_DATA_VIEW 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_CHA_CLASS_DATA_VIEW 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_CHA_CLASS_DATA_VIEW INTO WA_CHA_CLASS_DATA_VIEW.


*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 LUNIT, internal->external for field MASSEINHSW
CALL FUNCTION 'CONVERSION_EXIT_LUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CHA_CLASS_DATA_VIEW-MASSEINHSW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CHA_CLASS_DATA_VIEW-MASSEINHSW.
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_CHA_CLASS_DATA_VIEW_STR, 
SOLLWERT TYPE STRING,
TOLERANZOB TYPE STRING,
TOLERANZUN TYPE STRING,
TOLERWEIOB TYPE STRING,
TOLERWEIUN TYPE STRING,
KLASBREITE TYPE STRING,
KLASMITTE TYPE STRING,
GRENZEOB1 TYPE STRING,
GRENZEUN1 TYPE STRING,
GRENZEOB2 TYPE STRING,
GRENZEUN2 TYPE STRING,
PLAUSIOBEN TYPE STRING,
PLAUSIUNTE TYPE STRING,
QPMK_WERKS TYPE STRING,
QPMK_WERKS_TXT TYPE STRING,
QMTB_WERKS_TXT TYPE STRING,
QUALITAT TYPE STRING,
ALTERNAT TYPE STRING,
MASSEINHSW TYPE STRING,
PUMFKZ1 TYPE STRING,
PUMFKZ2 TYPE STRING,
PUMFKZ3 TYPE STRING,
PUMFKZ4 TYPE STRING,
ESTUKZ1 TYPE STRING,
ESTUKZ2 TYPE STRING,
ESTUKZ3 TYPE STRING,
ESTUKZ4 TYPE STRING,
ESTUKZ5 TYPE STRING,
DOKUKZ1 TYPE STRING,
DOKUKZ2 TYPE STRING,
DOKUKZ3 TYPE STRING,
RZWANG1 TYPE STRING,
RZWANG2 TYPE STRING,
RZWANG3 TYPE STRING,
RZWANG4 TYPE STRING,
DRUCK1 TYPE STRING,
DRUCK2 TYPE STRING,
DRUCK3 TYPE STRING,
KATSCHLGW1 TYPE STRING,
KATSCHLGW2 TYPE STRING,
KATSCHLGW3 TYPE STRING,
KATSCHLGW4 TYPE STRING,
KATSCHLGW5 TYPE STRING,
AWMNGKTX1 TYPE STRING,
AWMNGKTX2 TYPE STRING,
AWMNGKTX3 TYPE STRING,
AWMNGKTX4 TYPE STRING,
AWMNGKTX5 TYPE STRING,
CODETXTQL TYPE STRING,
CODETXTU TYPE STRING,
CODETXTO TYPE STRING,
QPMT_KTEXT TYPE STRING,
PQTXT TYPE STRING,
MERKGEWTXT TYPE STRING,
ANTVERFTXT TYPE STRING,
STICHPRTXT TYPE STRING,
DYNREGTXT TYPE STRING,
SPCTXT TYPE STRING,
ATTRIBUTES_TEXT TYPE STRING,
ATBEZ TYPE STRING,
MASTERCTXT TYPE STRING,
KEINEFORMEL TYPE STRING,
FORMELMK TYPE STRING,
EINVERARB TYPE STRING,
CHAORIG_REF TYPE STRING,
QP_CHAORIG_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CHA_CLASS_DATA_VIEW_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_CHA_CLASS_DATA_VIEW_STR-SOLLWERT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-TOLERANZOB sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-TOLERANZUN sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-TOLERWEIOB sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-TOLERWEIUN sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KLASBREITE sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KLASMITTE sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-GRENZEOB1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-GRENZEUN1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-GRENZEOB2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-GRENZEUN2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-PLAUSIOBEN sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-PLAUSIUNTE sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-QPMK_WERKS sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-QPMK_WERKS_TXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-QMTB_WERKS_TXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-QUALITAT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ALTERNAT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-MASSEINHSW sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-PUMFKZ1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-PUMFKZ2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-PUMFKZ3 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-PUMFKZ4 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ESTUKZ1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ESTUKZ2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ESTUKZ3 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ESTUKZ4 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ESTUKZ5 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-DOKUKZ1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-DOKUKZ2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-DOKUKZ3 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-RZWANG1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-RZWANG2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-RZWANG3 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-RZWANG4 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-DRUCK1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-DRUCK2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-DRUCK3 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KATSCHLGW1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KATSCHLGW2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KATSCHLGW3 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KATSCHLGW4 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KATSCHLGW5 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-AWMNGKTX1 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-AWMNGKTX2 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-AWMNGKTX3 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-AWMNGKTX4 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-AWMNGKTX5 sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-CODETXTQL sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-CODETXTU sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-CODETXTO sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-QPMT_KTEXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-PQTXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-MERKGEWTXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ANTVERFTXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-STICHPRTXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-DYNREGTXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-SPCTXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ATTRIBUTES_TEXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-ATBEZ sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-MASTERCTXT sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-KEINEFORMEL sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-FORMELMK sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-EINVERARB sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-CHAORIG_REF sy-vline 
WA_CHA_CLASS_DATA_VIEW_STR-QP_CHAORIG_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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