Re: pgsql: Change JSONB's on-disk format for improved performance.

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: pgsql-committers(at)postgresql(dot)org
Subject: Re: pgsql: Change JSONB's on-disk format for improved performance.
Date: 2014-09-29 17:59:14
Message-ID: 7534.1412013554@sss.pgh.pa.us
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Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> On 09/29/2014 12:29 PM, Tom Lane wrote:
>> Bump catversion to denote the incompatibility in on-disk format.
>> We will need to fix pg_upgrade to disallow upgrading jsonb data stored
>> with 9.4 betas 1 and 2.

> Just curious - why was the last digit of the catversion bumped as well
> as the second last?

We don't want the same catversion to be in use in two different branches,
so I have to assign a different catversion to HEAD than to 9.4. What
I've done in such cases is to use YYYYMMDD1 for the back branch and
YYYYMMDD2 for HEAD.

regards, tom lane

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