From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Oleg Bartunov <obartunov(at)gmail(dot)com> |
Cc: | Peter Geoghegan <pg(at)heroku(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Andres Freund <andres(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: jsonb status |
Date: | 2014-03-23 12:20:02 |
Message-ID: | 20140323122002.GD5606@momjian.us |
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Thread: | |
Lists: | pgsql-hackers |
On Sun, Mar 23, 2014 at 12:32:45PM +0400, Oleg Bartunov wrote:
> It's easy to add support of other operations to hash_ops, so it will
> be on par with default GIN opclass, at the price of bigger size. We
> can add it later to contrib/jsonbext.
>
> I'm mostly worrying about changing semantics of scalar.
>
>
> On Sun, Mar 23, 2014 at 4:27 AM, Peter Geoghegan <pg(at)heroku(dot)com> wrote:
> > On Sat, Mar 22, 2014 at 5:22 PM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> >> What did you decide about hashing values in indexes vs. putting them in
> >> literally?
> >
> > There are two GIN opclasses supplied. There is a default, which
> > supports more operators (various "existence" operators - see the
> > documentation). There is an alternative called jsonb_hash_ops that
> > only supports containment, and performs considerably better than the
> > default. Containment *is* the compelling operator to support, though -
> > you can do rather a lot with it. This must be what you're referring
> > to, since I recall you blogged about the response it got at pgConf.EU.
> > Both are available.
My question was about whether we decided to abandon the GiST support
entirely as there is no method for indexing long values:
In reading your reply, I now understand that GIN supports hash and
non-hash indexing types, which is great!
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ Everyone has their own god. +
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