"anara...@anarazel.de" <and...@anarazel.de> writes:
> I don't have access to the code ATM an I wonder whether DROP CONCURRENTLY has 
> a similar problem? Depends a bit on how the waiting is done...

It's not a problem --- that code doesn't depend on waiting for snapshots
to expire, it just checks for other sessions holding locks on the target
table.  (I also did some experimental testing to verify this.)

                        regards, tom lane

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