"Kevin Grittner" <[email protected]> writes:
> ... The precise
> conditions in which an UPDATE or DELETE can view an inconsistent
> database state (and therefore potentially persist something based on
> that inconsistent state) are that it has a FROM clause and/or
> subqueries which reference data changed by a concurrent database
> transaction which also affects rows which are targets of the UPDATE
> or DELETE.
Are we sure that's a precise and complete description? I don't have
a problem with putting a description just like that in the docs, but
I'm not yet convinced it's right.
regards, tom lane
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