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Date Dimension script optimized for Analysis Services KeyColumn property (Part 5)

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This is the final part of our stored procedure

                 

           –plain cursor works faster than CTE

           declare @CurrentYearKey smallint

 

           declare flaotHolidays cursor fast_forward

           for select distinct CalendarYearKey from @DimDate

           open flaotHolidays

           fetch next from flaotHolidays into @CurrentYearKey

          

           while @@fetch_status = 0

             begin

           

               –Memorial Day

               update @DimDate set Holiday = 1, HolidayName = ‘Memorial Day’

                where DateKey = (select max(DateKey)

                 from @DimDate where CalendarMonthOfYearNum = 5

                  and DayNameOfWeekLong = ‘Monday’

                  and CalendarYearKey = @CurrentYearKey)

 

                –Labor Day

                update @DimDate set Holiday = 1, HolidayName=‘Labor Day’

                 where DateKey = (select min(DateKey)

                  from @DimDate where CalendarMonthOfYearNum = 9

                   and DayNameOfWeekLong = ‘Monday’

                   and CalendarYearKey = @CurrentYearKey)

 

                –Thanksgiving

                update @DimDate set Holiday = 1, HolidayName = ‘Thanksgiving’

                 where DateKey = (select (min(DateKey) + 21)

                  from @DimDate where CalendarMonthOfYearNum = 11

                   and DayNameOfWeekLong = ‘Thursday’

                   and CalendarYearKey = @CurrentYearKey)

       

           fetch next from flaotHolidays into @CurrentYearKey

           end

          

           close flaotHolidays deallocate flaotHolidays

     

           update @DimDate set RecordCreateDate = @CurrentDate,

                               RecordUpdateDate = @CurrentDate   

 

           –return the completed table as a result set.

           select * from @DimDate

 

end

Once procedure is compiled on the server, a SSIS package can be build with one Data Flow task having OLE DB Source with SQL Command text as following:

exec [sp_PopulateDateDimension]  ’01/01/2009′, ’12/31/2013′

Once package completes, table DimDate is populated with data with each level having it’s own key column that will be used while adding those levels as attribute hierarchies.

Therefore, instead of using Composite Keys as shown on the picture

 

, a Simple Key will be used providing more optimized key solution. Just don’t forget to order Month attribute hierarchy by the Key, not Name (default)

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Written by Konstantin Gorakine

July 15, 2009 at 12:51 pm

Posted in SSAS

One Response

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  1. Awesome Script…..thanks

    Abdul Khan

    June 28, 2012 at 2:28 pm


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