Re: Additional current timestamp values - Mailing list pgsql-patches

From Bruce Momjian
Subject Re: Additional current timestamp values
Date
Msg-id 200603210158.k2L1wMY01170@candle.pha.pa.us
Whole thread Raw
In response to Re: Additional current timestamp values  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Additional current timestamp values
List pgsql-patches
Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > Tom Lane wrote:
> >> The patch as given strikes me as pretty broken --- it does not advance
> >> statement_timestamp when I would expect (AFAICS it only sets it during
> >> transaction start).
>
> > Uh, it does advance:
>
> But not once per statement --- in reality, you get a fairly arbitrary
> behavior that will advance in some cases and not others when dealing
> with a multi-statement querystring.  Your example showing that it fails
> to advance in a psql -c string shows this ... don't you think most
> people would call that a bug?

I assume RULES should have the same statement_timestamp and I figured my
approach was the only one that would work.

> If it's "statement" timestamp then I think it ought to advance once per
> SQL statement, which this isn't doing.  (As I already said, though, that
> isn't the behavior I really want.  My point is just that the code's
> behavior is an extremely strange, nonintuitive definition of the word
> "statement".)

I suppose so.

> > I have always been confused if
> > statement_timeout times queries inside server-side functions, for
> > example.  I don't think it should.
>
> That's exactly my point; I agree that we don't want it doing that,
> but that being the case, "statement" isn't a great name for the units
> that we are actually processing.  We're really wanting to do these
> things once per client command, or maybe per client query would be a
> better name.

Right.

--
  Bruce Momjian   http://candle.pha.pa.us
  SRA OSS, Inc.   http://www.sraoss.com

  + If your life is a hard drive, Christ can be your backup. +

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