From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | James Pye <lists(at)jwp(dot)name>, Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Cancelling idle in transaction state |
Date: | 2009-12-06 03:23:53 |
Message-ID: | 603c8f070912051923u1840ffy76419410a5e348a1@mail.gmail.com |
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Lists: | pgsql-hackers |
On Sat, Dec 5, 2009 at 10:15 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> I think this line of thinking is on the right track. The server
>> should certainly not send back an immediate ERROR response, because
>> that will definitely confuse the client. Of course, any subsequent
>> commands will report ERRORs until the client rolls back. But it also
>> seems highly desirable for the server to send some sort of immediate,
>> asynchronous notification, so that a sufficiently smart client can
>> immediately report the error back to the user or take such other
>> action as it deems appropriate.
>
> If you must have that, send a NOTICE.
Ah ha! I missed that one. That's perfect.
> I don't actually see the point
> though. If the client was as smart and well-coded as all that, it
> wouldn't be sitting on an open transaction in the first place.
Think about an interactive client. It's not the client's fault that
the user has chosen to begin a transaction and then sit there
cogitating, but the client would like to let the user know right away
that their current transaction is defunct.
...Robert
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