| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | pgsql-hackers(at)postgresql(dot)org |
| Cc: | "Florian G(dot) Pflug" <fgp(at)phlo(dot)org>, Martijn van Oosterhout <kleptog(at)svana(dot)org>, Shane Ambler <pgsql(at)sheeky(dot)biz>, NikhilS <nikkhils(at)gmail(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Subject: | Re: Auto creation of Partitions |
| Date: | 2007-03-06 18:44:31 |
| Message-ID: | 200703061044.31936.josh@agliodbs.com |
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| Lists: | pgsql-hackers pgsql-patches |
Florian,
> This sounds like what is really needed is a way to lock a certain
> condition, namely the existance or non-existance of a record with
> certain values in certain fields. This would not only help this case,
> it would also help RI triggers, because those wouldn't have to acquire
> a share lock on the referenced rows anymore.
That's called "predicate locking" and it's very, very hard to do.
--
Josh Berkus
PostgreSQL @ Sun
San Francisco
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