ABAP Select data from SAP table CMDQBSRULECHG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMDQBSRULECHG
*  INTO TABLE @DATA(IT_CMDQBSRULECHG2).
*--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_CMDQBSRULECHG INDEX 1 INTO DATA(WA_CMDQBSRULECHG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMDQBSRULECHG>-MANDT = 1.
<CMDQBSRULECHG>-MDQLTYBUSRULECHANGEDOCUMENT = 1.
<CMDQBSRULECHG>-MDQLTYBUSRULECHGDOCCHGGROUP = 1.
<CMDQBSRULECHG>-MDQLTYBUSRULECHGDOCCHGACTY = 1.
<CMDQBSRULECHG>-MDQLTYBUSRULECHGDOCDTBSTBLKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMDQBSRULECHG-MDQUALITYBUSINESSRULEUUID, sy-vline,
  WA_CMDQBSRULECHG-MDQLTYBUSINESSOBJECTTYPECODE, sy-vline,
  WA_CMDQBSRULECHG-MDQLTYBUSRULECHGDOCDATETIME, sy-vline,
  WA_CMDQBSRULECHG-USERID, sy-vline,
  WA_CMDQBSRULECHG-USERDESCRIPTION, sy-vline,
  WA_CMDQBSRULECHG-MDQUALITYBUSINESSRULE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMDQBSRULECHG 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_CMDQBSRULECHG 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_CMDQBSRULECHG INTO WA_CMDQBSRULECHG.


*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_CMDQBSRULECHG-MDQLTYBUSRULECHANGEDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMDQBSRULECHG-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_CMDQBSRULECHG_STR, 
MANDT TYPE STRING,
MDQLTYBUSRULECHANGEDOCUMENT TYPE STRING,
MDQLTYBUSRULECHGDOCCHGGROUP TYPE STRING,
MDQLTYBUSRULECHGDOCCHGACTY TYPE STRING,
MDQLTYBUSRULECHGDOCDTBSTBLKEY TYPE STRING,
MDQUALITYBUSINESSRULEUUID TYPE STRING,
MDQLTYBUSINESSOBJECTTYPECODE TYPE STRING,
MDQLTYBUSRULECHGDOCDATETIME TYPE STRING,
USERID TYPE STRING,
USERDESCRIPTION TYPE STRING,
MDQUALITYBUSINESSRULE TYPE STRING,
MDQUALITYBUSINESSRULENAME TYPE STRING,
MDQLTYBUSRULEPREVSTATUS TYPE STRING,
MDQLTYBUSRULENEWSTATUS TYPE STRING,
MDQUALITYRULEUSAGETYPE TYPE STRING,
MDQLTYRULEUSGECHANGEINDCODE TYPE STRING,
MDQLTYDIMENSIONUUID TYPE STRING,
MDQLTYDIMENSION TYPE STRING,
MDQLTYDIMENSIONCATEGORY TYPE STRING,
MDQLTYMINEDRULEISIMPLEMENTED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMDQBSRULECHG_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_CMDQBSRULECHG_STR-MANDT sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSRULECHANGEDOCUMENT sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSRULECHGDOCCHGGROUP sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSRULECHGDOCCHGACTY sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSRULECHGDOCDTBSTBLKEY sy-vline 
WA_CMDQBSRULECHG_STR-MDQUALITYBUSINESSRULEUUID sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSINESSOBJECTTYPECODE sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSRULECHGDOCDATETIME sy-vline 
WA_CMDQBSRULECHG_STR-USERID sy-vline 
WA_CMDQBSRULECHG_STR-USERDESCRIPTION sy-vline 
WA_CMDQBSRULECHG_STR-MDQUALITYBUSINESSRULE sy-vline 
WA_CMDQBSRULECHG_STR-MDQUALITYBUSINESSRULENAME sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSRULEPREVSTATUS sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYBUSRULENEWSTATUS sy-vline 
WA_CMDQBSRULECHG_STR-MDQUALITYRULEUSAGETYPE sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYRULEUSGECHANGEINDCODE sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYDIMENSIONUUID sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYDIMENSION sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYDIMENSIONCATEGORY sy-vline 
WA_CMDQBSRULECHG_STR-MDQLTYMINEDRULEISIMPLEMENTED sy-vline      INTO ld_text SEPARATED BY SPACE.

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