ABAP Select data from SAP table CMDQBSRULECDDTS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMDQBSRULECDDTS
*  INTO TABLE @DATA(IT_CMDQBSRULECDDTS2).
*--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_CMDQBSRULECDDTS INDEX 1 INTO DATA(WA_CMDQBSRULECDDTS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMDQBSRULECDDTS>-MANDT = 1.
<CMDQBSRULECDDTS>-MDQLTYBUSRULECHANGEDOCUMENT = 1.
<CMDQBSRULECDDTS>-MDQLTYBUSRULECHGDOCDTBSTABLE = 1.
<CMDQBSRULECDDTS>-MDQLTYBUSRULECHGDOCDTBSTBLKEY = 1.
<CMDQBSRULECDDTS>-MDQLTYBUSRULECHGDOCDTBSTBLFLD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMDQBSRULECDDTS-MDQLTYBUSRULECHGDOCITMCHGTYPE, sy-vline,
  WA_CMDQBSRULECDDTS-MDQLTYBUSRULECHGDOCCHGGROUP, sy-vline,
  WA_CMDQBSRULECDDTS-MDQLTYBUSRULECHGDOCCHGACTY, sy-vline,
  WA_CMDQBSRULECDDTS-MDQUALITYBUSINESSRULEUUID, sy-vline,
  WA_CMDQBSRULECDDTS-MDQLTYBUSINESSOBJECTTYPECODE, sy-vline,
  WA_CMDQBSRULECDDTS-MDQLTYBUSRULECHGDOCDATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMDQBSRULECDDTS 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_CMDQBSRULECDDTS 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_CMDQBSRULECDDTS INTO WA_CMDQBSRULECDDTS.


*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 MDQLTYBUSRULECHANGEDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMDQBSRULECDDTS-MDQLTYBUSRULECHANGEDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMDQBSRULECDDTS-MDQLTYBUSRULECHANGEDOCUMENT.
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_CMDQBSRULECDDTS_STR, 
MANDT TYPE STRING,
MDQLTYBUSRULECHANGEDOCUMENT TYPE STRING,
MDQLTYBUSRULECHGDOCDTBSTABLE TYPE STRING,
MDQLTYBUSRULECHGDOCDTBSTBLKEY TYPE STRING,
MDQLTYBUSRULECHGDOCDTBSTBLFLD TYPE STRING,
MDQLTYBUSRULECHGDOCITMCHGTYPE TYPE STRING,
MDQLTYBUSRULECHGDOCCHGGROUP TYPE STRING,
MDQLTYBUSRULECHGDOCCHGACTY TYPE STRING,
MDQUALITYBUSINESSRULEUUID TYPE STRING,
MDQLTYBUSINESSOBJECTTYPECODE TYPE STRING,
MDQLTYBUSRULECHGDOCDATETIME TYPE STRING,
USERID TYPE STRING,
MDQLTYBUSRULECHGDOCPREVFLDVAL TYPE STRING,
MDQLTYBUSRULECHGDOCNEWFLDVAL TYPE STRING,
MDQLTYBUSRULEPREVBASETABLE TYPE STRING,
MDQLTYBUSRULENEWBASETABLE TYPE STRING,
MDQLTYBUSRULEPREVCHKDFLDTABLE TYPE STRING,
MDQLTYBUSRULENEWCHKDFIELDTABLE TYPE STRING,
MDQLTYBUSRULEPREVCHKDFIELD TYPE STRING,
MDQLTYBUSRULENEWCHKDFIELD TYPE STRING,
MDQLTYBUSRULEPREVOWNER TYPE STRING,
MDQLTYRULEPREVOWNERFIRSTNAME TYPE STRING,
MDQLTYRULEPREVOWNERLASTNAME TYPE STRING,
MDQLTYBUSRULENEWOWNER TYPE STRING,
MDQLTYRULENEWOWNERFIRSTNAME TYPE STRING,
MDQLTYRULENEWOWNERLASTNAME TYPE STRING,
MDQLTYBUSRULEPREVEXPERT TYPE STRING,
MDQLTYRULEPREVEXPERTFIRSTNAME TYPE STRING,
MDQLTYRULEPREVEXPERTLASTNAME TYPE STRING,
MDQLTYBUSRULENEWEXPERT TYPE STRING,
MDQLTYRULENEWEXPERTFIRSTNAME TYPE STRING,
MDQLTYRULENEWEXPERTLASTNAME TYPE STRING,
MDQLTYBUSRULEPREVMSGASSGMTTYPE TYPE STRING,
MDQLTYBUSRULENEWMSGASSGMTTYPE TYPE STRING,
MDQLTYBUSRULEPREVSEVERITY TYPE STRING,
MDQLTYBUSRULENEWSEVERITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMDQBSRULECDDTS_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_CMDQBSRULECDDTS_STR-MANDT sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHANGEDOCUMENT sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCDTBSTABLE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCDTBSTBLKEY sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCDTBSTBLFLD sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCITMCHGTYPE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCCHGGROUP sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCCHGACTY sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQUALITYBUSINESSRULEUUID sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSINESSOBJECTTYPECODE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCDATETIME sy-vline 
WA_CMDQBSRULECDDTS_STR-USERID sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCPREVFLDVAL sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULECHGDOCNEWFLDVAL sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULEPREVBASETABLE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULENEWBASETABLE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULEPREVCHKDFLDTABLE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULENEWCHKDFIELDTABLE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULEPREVCHKDFIELD sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULENEWCHKDFIELD sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULEPREVOWNER sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULEPREVOWNERFIRSTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULEPREVOWNERLASTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULENEWOWNER sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULENEWOWNERFIRSTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULENEWOWNERLASTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULEPREVEXPERT sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULEPREVEXPERTFIRSTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULEPREVEXPERTLASTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULENEWEXPERT sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULENEWEXPERTFIRSTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYRULENEWEXPERTLASTNAME sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULEPREVMSGASSGMTTYPE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULENEWMSGASSGMTTYPE sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULEPREVSEVERITY sy-vline 
WA_CMDQBSRULECDDTS_STR-MDQLTYBUSRULENEWSEVERITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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