On May 27, 2011, at 2:35 PM, Tom Lane wrote:

> "David E. Wheeler" <da...@kineticode.com> writes:
>> I like it, but what do you do when a TZ has been renamed or has ceased
>> to exist.
> 
> As far as that goes, I think "nothing" is a sufficient answer.  There's
> no requirement that an OID in the mapping table correspond to a live TZ.
> It's just a more compact way of storing a string name.

Well then you'd just want to be sure to never delete TZs.

I think the issue of trying this week to use a TZ that was removed last week 
might be more problematic. I mean, we could just let the user use it, but that 
hardly seems wise…

Best,

David
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