From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: Robert Haas <robertmhaas@gmail.com>
Cc: David Rowley <david.rowley@2ndquadrant.com>
Cc: Amit Langote <amitlangote09@gmail.com>
Cc: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
Cc: Jesper Pedersen <jesper.pedersen@redhat.com>
Cc: Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>
Cc: Beena Emerson <memissemerson@gmail.com>
Cc: amul sul <sulamul@gmail.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Cc: Dilip Kumar <dilipbalaut@gmail.com>
Subject: Re: [HACKERS] Runtime Partition Pruning
Date: Mon, 9 Apr 2018 15:48:05 -0300
Message-ID: <20180409184805.ieucnlxwnwr2mprt@alvherre.pgsql> (raw)
In-Reply-To: <CA+TgmoY64G_VRyRgAfB3x9RdNJ=oozmSaj1d6_Oi9Ab52d+OHg@mail.gmail.com>
Robert Haas wrote:
> On Mon, Apr 9, 2018 at 2:28 PM, Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> > Robert Haas wrote:
> >> I don't get this. The executor surely had to (and did) open all of
> >> the relations somewhere even before this patch.
> >
> > I was worried that this coding could be seen as breaking modularity, or
> > trying to do excessive work. However, after looking closer at it, it
> > doesn't really look like it's the case. So, nevermind.
>
> Well what I'm saying is that it shouldn't be necessary. If the
> relations are being opened already and the pointers to the relcache
> entries are being saved someplace, you shouldn't need to re-open them
> elsewhere to get pointers to the relcache entries.
Oh, okay. I can look into that.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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To: pgsql-hackers@postgresql.org
Cc: alvherre@alvh.no-ip.org, robertmhaas@gmail.com, david.rowley@2ndquadrant.com, amitlangote09@gmail.com, Langote_Amit_f8@lab.ntt.co.jp, jesper.pedersen@redhat.com, rajkumar.raghuwanshi@enterprisedb.com, memissemerson@gmail.com, sulamul@gmail.com, dilipbalaut@gmail.com
Subject: Re: [HACKERS] Runtime Partition Pruning
In-Reply-To: <20180409184805.ieucnlxwnwr2mprt@alvherre.pgsql>
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