From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Rationalizing EXPLAIN VERBOSE output |
Date: | 2002-03-11 02:48:42 |
Message-ID: | 200203110248.g2B2mgY13429@candle.pha.pa.us |
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Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Seems EXPLAIN as SELECT would break our elog() control of output to the
> > server logs.
>
> EXPLAIN as SELECT would mean that the server log is out of the picture
> entirely, which is not necessarily a bad thing. Is there a good reason
> for logging EXPLAIN output? I can't see one other than "we've always
> done it that way".
I can't think of a good reason, but making it a select output makes
EXPLAIN one of the few things you can't get into the server logs, even
if you want to. At DEBUG5, you get almost everything about a query.
Seems you may want to capture EXPLAIN in there too, but because we can
control those with print_* using various SET parameters, I guess it is
OK.
There are other INFO types that are sent to the client that can't be
captured in psql output, like VACUUM VERBOSE. I guess I would rather
see NOTICES go to the \g/\o output file and to the terminal as a fix
that would solve the problem easily.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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