From: | Dave Cramer <pg(at)fastcrypt(dot)com> |
---|---|
To: | David Johnston <polobo(at)yahoo(dot)com> |
Cc: | List <pgsql-jdbc(at)postgresql(dot)org> |
Subject: | Re: Re: A prepared statement ERROR due to EMPTY_QUERY is defined as a static Instance. |
Date: | 2014-03-11 16:06:20 |
Message-ID: | CADK3HHL3HLCEve21TsNEF7zmWP-tkdZptF3+xbhL+O7hqN8fxA@mail.gmail.com |
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Lists: | pgsql-jdbc |
I have never seen anyone use an empty query before. I doubt it saves any
bandwidth as I believe there would be a query response
Dave Cramer
dave.cramer(at)credativ(dot)ca
http://www.credativ.ca
On Mon, Mar 10, 2014 at 9:22 PM, David Johnston <polobo(at)yahoo(dot)com> wrote:
> Naoya Anzai wrote
> > Hi Dave,
> >
> > Thanks for your response.
> >
> >> Thanks for the patch! Curious how would you ever come across this ?
> >
> > This incident was reported by one of our customers.
> > So I don't know why their application executes EMPTY_QUERY frequently...
> >
> > Regards,
>
> The most obvious reason would be as a keep-alive query...I have no idea
> whether that is a wise decision compared to "SELECT 1;" or something that
> actually causes the server to perform work (i.e., what does the server do
> when it see the empty-string as input?).
>
> David J.
>
>
>
>
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