Re: REINDEX CONCURRENTLY 2.0

From: Andres Freund <andres(at)anarazel(dot)de>
To: Jim Nasby <Jim(dot)Nasby(at)BlueTreble(dot)com>
Cc: Andreas Karlsson <andreas(at)proxel(dot)se>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: REINDEX CONCURRENTLY 2.0
Date: 2017-03-02 06:18:08
Message-ID: 20170302061808.nfuptpli3lrlc5l7@alap3.anarazel.de
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On 2017-03-01 19:25:23 -0600, Jim Nasby wrote:
> On 2/28/17 11:21 AM, Andreas Karlsson wrote:
> > The only downside I can see to this approach is that we no logner will
> > able to reindex catalog tables concurrently, but in return it should be
> > easier to confirm that this approach can be made work.
>
> Another downside is any stored regclass fields will become invalid.
> Admittedly that's a pretty unusual use case, but it'd be nice if there was
> at least a way to let users fix things during the rename phase (perhaps via
> an event trigger).

I'm fairly confident that we don't want to invoke event triggers inside
the CIC code... I'm also fairly confident that between index oids
stored somewhere being invalidated - what'd be a realistic use case of
that - and not having reindex concurrently, just about everyone will
choose the former.

Regards,

Andres

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