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Re: Query progress indication - an implementation

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Scara Maccai <m_lists(at)yahoo(dot)it>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Query progress indication - an implementation
Date: 2009-06-29 18:07:23
Message-ID: 16876.1246298843@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Josh Berkus <josh(at)agliodbs(dot)com> writes:
> So, while an actual % completed indicator would be perfect, a "query 
> steps completed, current step =" would still be very useful and a large 
> improvement over what we have now.

I think this is pretty much nonsense --- most queries run all their plan
nodes concurrently to some extent.  You can't usefully say that a query
is "on" some node, nor measure progress by whether some node is "done".

			regards, tom lane

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