Presentation Layer column name change effects on existing reports ?

Hello Gurus,
I have one requirement where user are not sure about the column names in Presentation Layer.
so they want us to create the reports and once the reports are delivered they will give us the column name as per their requirement.
now i read couple of blogs related to this, that does it affects the exiting reports?
in couple of blogs they says that i won't. becaus BI server creates the alias for the old name and will reflects it wherever it's used in reports..
So can anyone tell me where this alias name has been stored in OBIEE?
and is there any precaution that needs to be done while doing this beacuse we are expecting to create around 40-50 reports and changing the column name after changing the presentation layer name change will increase lots of work..
Thanking You..

I've confirmed it on a 10g environment that when you rename the column in the RPD the existing reports reflect the change.
What I was referring to in the statement you highlight is that a column name can be changed when being used as the definition of a report. If somebody specifies an abbreviation of the current name to fit it in a table or chart then it will not be updated from a name change in the RPD.
So long as you build reports using the name provided by the RPD and none of the developers take the liberty of renaming it in the column properties of the request/analyses the single rename should take effect through all the reports you build.
You can also manage the column name by renaming it in a report and using the save as system wide default. But the way you intend to do it would be the best method.
Edited by: James - Projected on 25-May-2012 14:07

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Could you pl clarify the Q? Do you mean that Reports Buider has automatically added an alias to a column name? This is not expected.
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Presentation Layer column name change effects on existing reports ?

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