From: Kenneth Marshall <ktm@rice.edu>
To: hans wulf <lotu1@gmx.net>
Cc: Maciek Sakrejda <msakrejda@truviso.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: ANTI-JOIN needs table, index scan not possible?
Date: Fri, 11 Mar 2011 16:16:03 -0600
Message-ID: <20110311221603.GI8169@aart.is.rice.edu> (raw)
In-Reply-To: <20110311175439.6380@gmx.net>
References: <20110311153205.6380@gmx.net>
<AANLkTink26wyiPdjdd=Tv-me=XFempCnjsJDGj0wbrhJ@mail.gmail.com>
<20110311175439.6380@gmx.net>
On Fri, Mar 11, 2011 at 06:54:39PM +0100, hans wulf wrote:
> Thanks for the answer.
>
> so there's no way around this problem? A nice index bitmap merge thing would be super fast. Big table ANTI JOIN queries with only a few results expected, are totally broken, if this is true.
>
> This way the query breaks my neck. This is a massive downside of postgres which makes this kind of query impossible. Mysql gives you the answer in a few seconds :-(
>
>
Super! I am glad that MySQL can meet your needs. No software is
perfect and you should definitely chose based on your use-case.
Regards,
Ken
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To: pgsql-performance@postgresql.org
Cc: ktm@rice.edu, lotu1@gmx.net, msakrejda@truviso.com
Subject: Re: ANTI-JOIN needs table, index scan not possible?
In-Reply-To: <20110311221603.GI8169@aart.is.rice.edu>
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