Excerpts from Andres Freund's message of lun jul 19 13:58:30 -0400 2010:
> Hi,
> 
> On Monday 19 July 2010 19:57:13 Alvaro Herrera wrote:
> > Excerpts from Andres Freund's message of lun jul 19 11:58:06 -0400 2010:
> > > On Monday 19 July 2010 17:26:25 Hans van Kranenburg wrote:
> > > > When issuing an update statement in a transaction with ~30800 levels of
> > > > savepoint nesting, (which is insane, but possible), postgresql
> > > > segfaults due to a stack overflow in the AssignTransactionId function,
> > > > which recursively assign transaction ids to parent transactions.
> > > 
> > > It seems easy enough to throw a check_stack_depth() in there - survives
> > > make check here.
> > 
> > I wonder if it would work to deal with the problem non-recursively
> > instead.  We don't impose subxact depth restrictions elsewhere, why
> > start now?
> It looks trivial enough, but whats the point?

Avoid imposing unnecessary restrictions.

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