ABAP Select data from SAP table MDQ_DIMN_CAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDQ_DIMN_CAT 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_DIMN_CAT. 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_DIMN_CAT 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_DIMN_CAT TYPE STANDARD TABLE OF MDQ_DIMN_CAT,
      WA_MDQ_DIMN_CAT TYPE MDQ_DIMN_CAT,
      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_DIMN_CAT> TYPE MDQ_DIMN_CAT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDQ_DIMN_CAT
*  INTO TABLE @DATA(IT_MDQ_DIMN_CAT2).
*--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_DIMN_CAT INDEX 1 INTO DATA(WA_MDQ_DIMN_CAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDQ_DIMN_CAT>-CLIENT = 1.
<MDQ_DIMN_CAT>-MDQLTYDIMENSIONCATEGORYUUID = 1.
<MDQ_DIMN_CAT>-MDQLTYBUSINESSOBJECTTYPECODE = 1.
<MDQ_DIMN_CAT>-MDQLTYDIMENSIONCATEGORY = 1.
<MDQ_DIMN_CAT>-MDQLTYEVALTARGETTHRESHOLD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDQ_DIMN_CAT-MDQLTYEVALWARNINGTHRESHOLD, sy-vline,
  WA_MDQ_DIMN_CAT-MDQLTYEVALCRITICALTHRESHOLD, sy-vline,
  WA_MDQ_DIMN_CAT-MDQLTYDIMNCATCRTEATDATETIME, sy-vline,
  WA_MDQ_DIMN_CAT-MDQLTYDIMNCATCRTEDBYUSER, sy-vline,
  WA_MDQ_DIMN_CAT-MDQLTYDIMNCATUPDTDATDATETIME, sy-vline,
  WA_MDQ_DIMN_CAT-MDQLTYDIMNCATUPDTDBYUSER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDQ_DIMN_CAT 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_DIMN_CAT 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_DIMN_CAT INTO WA_MDQ_DIMN_CAT.


*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_DIMN_CAT_STR, 
CLIENT TYPE STRING,
MDQLTYDIMENSIONCATEGORYUUID TYPE STRING,
MDQLTYBUSINESSOBJECTTYPECODE TYPE STRING,
MDQLTYDIMENSIONCATEGORY TYPE STRING,
MDQLTYEVALTARGETTHRESHOLD TYPE STRING,
MDQLTYEVALWARNINGTHRESHOLD TYPE STRING,
MDQLTYEVALCRITICALTHRESHOLD TYPE STRING,
MDQLTYDIMNCATCRTEATDATETIME TYPE STRING,
MDQLTYDIMNCATCRTEDBYUSER TYPE STRING,
MDQLTYDIMNCATUPDTDATDATETIME TYPE STRING,
MDQLTYDIMNCATUPDTDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDQ_DIMN_CAT_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_DIMN_CAT_STR-CLIENT sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYDIMENSIONCATEGORYUUID sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYBUSINESSOBJECTTYPECODE sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYDIMENSIONCATEGORY sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYEVALTARGETTHRESHOLD sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYEVALWARNINGTHRESHOLD sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYEVALCRITICALTHRESHOLD sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYDIMNCATCRTEATDATETIME sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYDIMNCATCRTEDBYUSER sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYDIMNCATUPDTDATDATETIME sy-vline 
WA_MDQ_DIMN_CAT_STR-MDQLTYDIMNCATUPDTDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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