Re: FOR KEY LOCK foreign keys

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr>
Cc: Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: FOR KEY LOCK foreign keys
Date: 2011-01-23 01:46:17
Message-ID: AANLkTik7nPN10As8-6=hTrPEw5aZTc0a-LAQA3HwTYPv@mail.gmail.com
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On Sat, Jan 22, 2011 at 4:25 PM, Dimitri Fontaine
<dimitri(at)2ndquadrant(dot)fr> wrote:
> Hi,
>
> This is a first level of review for the patch.  I finally didn't get as
> much time as I hoped I would, so couldn't get familiar with the locking
> internals and machinery… as a result, I can't much comment on the code.
>
> The patch applies cleanly (patch moves one hunk all by itself) and
> compiles with no warning.  It includes no docs, and I think it will be
> required to document the user visible SELECT … FOR KEY LOCK OF x new
> feature.

I feel like this should be called "KEY SHARE" rather than "KEY LOCK".
It's essentially a weaker version of the SHARE lock we have now, but
that's not clear from the name.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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