ABAP Select data from SAP table MDQ_RULEMINING into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDQ_RULEMINING
*  INTO TABLE @DATA(IT_MDQ_RULEMINING2).
*--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_MDQ_RULEMINING INDEX 1 INTO DATA(WA_MDQ_RULEMINING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDQ_RULEMINING>-CLIENT = 1.
<MDQ_RULEMINING>-MDQLTYRULEMININGUUID = 1.
<MDQ_RULEMINING>-MDQLTYBUSINESSOBJECTTYPECODE = 1.
<MDQ_RULEMINING>-MDQLTYRULEMINING = 1.
<MDQ_RULEMINING>-MDQLTYRULEMININGTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDQ_RULEMINING-MDQLTYRULEMININGGOALTEXT, sy-vline,
  WA_MDQ_RULEMINING-MDQLTYRULEMININGMAXNMBROFRULES, sy-vline,
  WA_MDQ_RULEMINING-MDQLTYRULEMININGSTATUS, sy-vline,
  WA_MDQ_RULEMINING-MDQLTYRULEMININGCREATIONDTETME, sy-vline,
  WA_MDQ_RULEMINING-MDQLTYRULEMININGCRTEDBYUSR, sy-vline,
  WA_MDQ_RULEMINING-MDQLTYRULEMININGCHANGEDATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDQ_RULEMINING 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_MDQ_RULEMINING 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_MDQ_RULEMINING INTO WA_MDQ_RULEMINING.


*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 MDQLTYRULEMINING
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDQ_RULEMINING-MDQLTYRULEMINING
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDQ_RULEMINING-MDQLTYRULEMINING.
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_MDQ_RULEMINING_STR, 
CLIENT TYPE STRING,
MDQLTYRULEMININGUUID TYPE STRING,
MDQLTYBUSINESSOBJECTTYPECODE TYPE STRING,
MDQLTYRULEMINING TYPE STRING,
MDQLTYRULEMININGTEXT TYPE STRING,
MDQLTYRULEMININGGOALTEXT TYPE STRING,
MDQLTYRULEMININGMAXNMBROFRULES TYPE STRING,
MDQLTYRULEMININGSTATUS TYPE STRING,
MDQLTYRULEMININGCREATIONDTETME TYPE STRING,
MDQLTYRULEMININGCRTEDBYUSR TYPE STRING,
MDQLTYRULEMININGCHANGEDATETIME TYPE STRING,
MDQLTYRULEMININGCHGDBYUSR TYPE STRING,
MDQLTYRULEMININGCOMPLTNDTETME TYPE STRING,
MDQLTYRULEMININGJOB TYPE STRING,
MDQLTYRULEMININGJOBINSTANCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDQ_RULEMINING_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_MDQ_RULEMINING_STR-CLIENT sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGUUID sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYBUSINESSOBJECTTYPECODE sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMINING sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGTEXT sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGGOALTEXT sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGMAXNMBROFRULES sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGSTATUS sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGCREATIONDTETME sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGCRTEDBYUSR sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGCHANGEDATETIME sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGCHGDBYUSR sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGCOMPLTNDTETME sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGJOB sy-vline 
WA_MDQ_RULEMINING_STR-MDQLTYRULEMININGJOBINSTANCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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