Re: "truncate all"?

TODO updated:

* Allow TRUNCATE ... CASCADE/RESTRICT

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Tom Lane wrote:
> Robert Treat <xzilla(at)users(dot)sourceforge(dot)net> writes:
> > On Sun, 2003-08-17 at 00:42, Tom Lane wrote:
> >> To do anything else, you'd have to solve some locking and/or
> >> race-condition problems: rows could be inserted in the other table
> >> while the TRUNCATE runs.
>
> > Seems like you'll have that issue with truncate all wont you? I guess
> > we'll assume that if you use the cascade statement you understand these
> > risks and accept them.
>
> Yeah. A TRUNCATE ALL would need exclusive lock on every table. If
> there are any other transactions running, the odds of getting all those
> locks without deadlocking are pretty low. TRUNCATE CASCADE would also
> have a risk of failing due to deadlock (but with fewer tables in play
> it'd have a smaller risk). TRUNCATE RESTRICT should *not* create a
> deadlock risk IMHO, and that means it can't lock other tables.
>
> regards, tom lane
>

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