On Fri, Dec 16, 2016 at 9:39 AM, Kevin Grittner wrote:
> Good catch!
Thanks!
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Robert Haas
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now which
index or heap pages will be locked at the start of execution. We
acquire them as we go along. At any point in that we could acquire
one which creates an rw-conflict with Tpivot, couldn't we?
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Robert Haas
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will see an internally-consistent view which is not
compatible with any global serial ordering. I don't see why it would
see an internally-inconsistent view; inconsistent how?
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On Wed, Dec 14, 2016 at 9:40 AM, Kevin Grittner wrote:
> On Wed, Dec 14, 2016 at 8:27 AM, Robert Haas wrote:
>> But even after that fix, at the least, you'll still be able to
>> demonstrate the same problem by trapping serialization_failure rather
>> than unique_const
gt; I'm not sure about foreign key constraints and exclusion
> constraints. I have neither seen a failure related to either of
> these, nor proven that there cannot be one. Without having
> assessed the scope of the problems (if any) in those constraints,
> it's hard to say what
On Wed, Dec 14, 2016 at 9:05 AM, Alvaro Herrera
wrote:
> Robert Haas wrote:
>> I have not read any database literature on the interaction of
>> serializability with subtransactions. This seems very thorny.
>> Suppose T1 reads A and B and updates A -> A' while concurr
be serialization anomalies that go
undetected. And the user should put up with that because the cure is
worse than the disease. Maybe there's a more formally satisfying
answer than that but I'm not really seeing it...
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Robert Haas
EnterpriseDB: http://www.enterprisedb.com
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