Re: How is this possible? (more on deadlocks)

>>>>> "CM" == Carlos Moreno <moreno(at)mochima(dot)com> writes:

CM> Ok, now I'm really intrigued by what looks to me
CM> (possibly from a naive point of view) like a bug,
CM> or rather, a limitation on the implementation.
[[ ... ]]
CM> I don't know about the internals of how transactions
CM> and locks and FK constraints are handled, but I'm
CM> analyzing it and describing what seems to be
CM> happening internally, based on the behaviour I
CM> observe.

FWIW I get bit by this quite a bit. Unfortunately all the deadlock
avoidance theory doesn't help you since you're not explicitly getting
the locks, and as you see, ordering the insert/update operations such
as to avoid conflicting locks is hard to do.

If I could designate the transaction I prefer to be killed, it would
save me a lot: often my short easy to repeat transaction wins out over
some large multi-thousand row select/insertion operation.

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