Cannot Create private Time Dimension

I have a fact table with 32.000.000 rows. In cube editor , I want to create
a
private time dimension based on a datetime type column of my fact table.
after I press next button on "select advanced options" window, several
minutes passes and then a "finish" button appears in the same window
instead of next button. when I pressed finish, I got pop up message "the nam
e
cannot be an empty string" but I have no place to write the name of the
dimension.I typically discourage creating a time dimension like this. I strongly
recommend that you create an independent dimension table which incorporates
"Time". Then use the timestamps from your fact table as FKs to this
dimension. This is normally the best approach because it:
1) allows you to model data which does not exist, e.g. holidays, weekends,
etc, which are not represented in your fact table.
2) dimension processing goes much faster (i.e. you don't have to scan
multiple rows); this is particularly true here because the system will issue
a SELECT DISTINCT to process the private time dimension.
3) private dimensions must always be reprocessed when you process the fact
table -- which can greatly increase your overhead (see #2 above)
4) you will always be limited to a single partition because you can't build
across multiple fact tables (which can limit your scalability, query
response time, rolling "n" months -- all of which use multiple partitions).
5) if you create an independent time dimension table, you can have
interesting extensions to just a timestamp, e.g. model holidays, seasons,
work-days compared to weekends, etc.
--
Dave Wickert [MSFT]
dwickert@.online.microsoft.com
Program Manager
BI SystemsTeam
SQL BI Product Unit (Analysis Services)
--
This posting is provided "AS IS" with no warranties, and confers no rights.
"Banu_Tr" <Banu_Tr@.discussions.microsoft.com> wrote in message
news:ABBE65C4-C6C8-4DF5-AEB8-2DFBE6489608@.microsoft.com...
> I have a fact table with 32.000.000 rows. In cube editor , I want to
create a
> private time dimension based on a datetime type column of my fact table.
> after I press next button on "select advanced options" window, several
> minutes passes and then a "finish" button appears in the same window
> instead of next button. when I pressed finish, I got pop up message "the
name
> cannot be an empty string" but I have no place to write the name of the
> dimension.