Rails - Sep 2006 - adding sequences to postgresql DBMS via migration generator

Can somebody provide me with a code example of how to tell a migration 
to add a sequence other than the default?  I have been floundering 
around with the books and online resources but cannot find a clear 
example.  I anticipate that some sort of option hash is invloved but I 
cannot determin the correct syntax.

I imagine that it would go something like this:

...
   t.column  :my_sequence_name   :sequence  =>
''my_sequence_name'' ????
...

Is this supposed to work?  What other options are there if it does?

Many thanks.
Jim

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Note:  I want to add and additional sequence, not rename the default.

Regards,
Jim



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