From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Thomas Munro <thomas.munro@gmail.com>
Cc: vignesh C <vignesh21@gmail.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>
Cc: Jerry Sievers <gsievers19@comcast.net>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Subject: Re: SegFault on 9.6.14
Date: Mon, 12 Aug 2019 17:48:33 -0400
Message-ID: <14905.1565646513@sss.pgh.pa.us> (raw)
In-Reply-To: <CA+TgmoZHcMqmwtnfW6X3gyJW84S5LxERVmNPobXtmrQkJh+x4A@mail.gmail.com>
References: <CA+hUKGK=dChcQtgf1-r73XEqDhW1VD32Tf9qDi39aYbjuE3mGA@mail.gmail.com>
<20190812190749.GA13961@alvherre.pgsql>
<CA+TgmoZHcMqmwtnfW6X3gyJW84S5LxERVmNPobXtmrQkJh+x4A@mail.gmail.com>
Robert Haas <robertmhaas@gmail.com> writes:
> Being able to do that sort of thing was one of my goals in designing
> the ExecShutdownNode stuff. Unfortunately, it's clear from this bug
> report that it's still a few bricks short of a load, and Tom doesn't
> seem real optimistic about how easy it will be to buy those bricks at
> discount prices. But I hope we persist in trying to get there, because
> I don't like the idea of saying that we'll never be smart enough to
> know we're done with any part of the plan until we're definitely done
> with the whole thing. I think that's leaving too much money on the
> table.
To clarify my position --- I think it's definitely possible to improve
the situation a great deal. We "just" have to pass down more information
about whether rescans are possible. What I don't believe is that that
leads to a bug fix that would be sane to back-patch as far as 9.6.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, robertmhaas@gmail.com, alvherre@2ndquadrant.com, thomas.munro@gmail.com, vignesh21@gmail.com, amit.kapila16@gmail.com, gsievers19@comcast.net, tomas.vondra@2ndquadrant.com
Subject: Re: SegFault on 9.6.14
In-Reply-To: <14905.1565646513@sss.pgh.pa.us>
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