public inbox for [email protected]  

help / color / mirror / Atom feed

From: Greg Stark <[email protected]>
To: Bruce Momjian <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Gavin Flower <[email protected]>
Cc: David E. Wheeler <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Heikki Linnakangas <[email protected]>
Cc: Andrew Dunstan <[email protected]>
Cc: Peter Geoghegan <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: default opclass for jsonb (was Re: Call for GIST/GIN/SP-GIST opclass documentation)
Date: Fri, 9 May 2014 15:26:33 +0100
Message-ID: <CAM-w4HOQ+ynm70Cgr4BwMqMc0jfL_8EZAwG2UD6r=EehjH3OOw@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
List-Unsubscribe: <mailto:[email protected]?body=unsub%20pgsql-hackers>

On Fri, May 9, 2014 at 2:53 PM, Bruce Momjian <[email protected]> wrote:
> Well, if we are optionally hashing json_ops for long strings, what does
> jsonb_hash_ops do uniquely with hashing?  Does it always hash, while
> json_ops optionally hashes?  Is that the distinguishing characteristic?
> It seemed the _content_ of the indexed value was more important, rather
> than the storage method.
>
> Should jsonb_hash_ops do only optional hashing too for long strings?


Well the question seems to me to be that if we're always doing recheck
then what advantage is there to not hashing everything?

-- 
greg


-- 
Sent via pgsql-hackers mailing list ([email protected])
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers

view thread (65+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
  Subject: Re: default opclass for jsonb (was Re: Call for GIST/GIN/SP-GIST opclass documentation)
  In-Reply-To: <CAM-w4HOQ+ynm70Cgr4BwMqMc0jfL_8EZAwG2UD6r=EehjH3OOw@mail.gmail.com>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox