ABAP Select data from SAP table MDQ_RULE_DEF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDQ_RULE_DEF 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_RULE_DEF. 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_RULE_DEF 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_RULE_DEF TYPE STANDARD TABLE OF MDQ_RULE_DEF,
      WA_MDQ_RULE_DEF TYPE MDQ_RULE_DEF,
      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_RULE_DEF> TYPE MDQ_RULE_DEF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDQ_RULE_DEF
*  INTO TABLE @DATA(IT_MDQ_RULE_DEF2).
*--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_RULE_DEF INDEX 1 INTO DATA(WA_MDQ_RULE_DEF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDQ_RULE_DEF>-CLIENT = 1.
<MDQ_RULE_DEF>-MDQUALITYBUSINESSRULEUUID = 1.
<MDQ_RULE_DEF>-MDQLTYBUSRULECREATIONDATETIME = 1.
<MDQ_RULE_DEF>-MDQLTYBUSRULECREATEDBYUSER = 1.
<MDQ_RULE_DEF>-MDQLTYBUSRULECHANGEDATETIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDQ_RULE_DEF-MDQLTYBUSRULECHANGEDBYUSER, sy-vline,
  WA_MDQ_RULE_DEF-MDQUALITYBUSINESSRULE, sy-vline,
  WA_MDQ_RULE_DEF-MDQLTYBUSINESSOBJECTTYPECODE, sy-vline,
  WA_MDQ_RULE_DEF-MDQUALITYBUSINESSRULENAME, sy-vline,
  WA_MDQ_RULE_DEF-MDQLTYBUSINESSRULEBASETABLE, sy-vline,
  WA_MDQ_RULE_DEF-MDQLTYBUSINESSRULESTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDQ_RULE_DEF 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_RULE_DEF 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_RULE_DEF INTO WA_MDQ_RULE_DEF.


*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_MDQ_RULE_DEF_STR, 
CLIENT TYPE STRING,
MDQUALITYBUSINESSRULEUUID TYPE STRING,
MDQLTYBUSRULECREATIONDATETIME TYPE STRING,
MDQLTYBUSRULECREATEDBYUSER TYPE STRING,
MDQLTYBUSRULECHANGEDATETIME TYPE STRING,
MDQLTYBUSRULECHANGEDBYUSER TYPE STRING,
MDQUALITYBUSINESSRULE TYPE STRING,
MDQLTYBUSINESSOBJECTTYPECODE TYPE STRING,
MDQUALITYBUSINESSRULENAME TYPE STRING,
MDQLTYBUSINESSRULEBASETABLE TYPE STRING,
MDQLTYBUSINESSRULESTATUS TYPE STRING,
MDQLTYBUSINESSRULEOWNER TYPE STRING,
MDQLTYBUSINESSRULEEXPERT TYPE STRING,
MDQLTYBUSRULECHECKEDFIELD TYPE STRING,
MDQLTYBUSRULECHECKEDFIELDTABLE TYPE STRING,
MDQLTYBUSRULECHKDFIELDANDTABLE TYPE STRING,
MDQLTYBUSRULEUSGEISPERMITTED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDQ_RULE_DEF_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_RULE_DEF_STR-CLIENT sy-vline 
WA_MDQ_RULE_DEF_STR-MDQUALITYBUSINESSRULEUUID sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULECREATIONDATETIME sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULECREATEDBYUSER sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULECHANGEDATETIME sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULECHANGEDBYUSER sy-vline 
WA_MDQ_RULE_DEF_STR-MDQUALITYBUSINESSRULE sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSINESSOBJECTTYPECODE sy-vline 
WA_MDQ_RULE_DEF_STR-MDQUALITYBUSINESSRULENAME sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSINESSRULEBASETABLE sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSINESSRULESTATUS sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSINESSRULEOWNER sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSINESSRULEEXPERT sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULECHECKEDFIELD sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULECHECKEDFIELDTABLE sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULECHKDFIELDANDTABLE sy-vline 
WA_MDQ_RULE_DEF_STR-MDQLTYBUSRULEUSGEISPERMITTED sy-vline      INTO ld_text SEPARATED BY SPACE.

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