Does it mean that I have to commit after each select statement?
Here what the manual says:
------------
Description
COMMIT commits the current transaction. All changes made by the transaction
become visible to others and are guaranteed to be durable if a crash occurs.
-----------
Does select produces some changes?
Regards,
Tigran.
Tom Lane wrote:
> Tigran Mkrtchyan <tigran.mkrtchyan@desy.de> writes:
>> I got a incorrect or unexpected behavior in concurrent environment.
>
> This is not a bug, nor even surprising. Since you haven't committed
> the second transaction, there are a growing number of
> dead-but-not-recyclable versions of the updated row. The active client
> has to check each of these versions during its primary key uniqueness
> check during each update.
>
> regards, tom lane
--
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