Re: WIP: Hash Join-Filter Pruning using Bloom Filters

From: "Hannes Eder" <hannes(at)hanneseder(dot)net>
To: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
Cc: "Pg Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: WIP: Hash Join-Filter Pruning using Bloom Filters
Date: 2008-11-02 22:36:53
Message-ID: 154e089b0811021436r222614fbw411ab446903b815f@mail.gmail.com
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On Sun, Nov 2, 2008 at 10:49 PM, Jonah H. Harris <jonah(dot)harris(at)gmail(dot)com> wrote:
> Similarly, I
> created a GUC to enable pruning, named bloom_pruning.

I guess calls to bloom_filter_XXX should be surrounded by "if
(bloom_pruning) ..." or a similar construct, i.e. make use of the GUC
variable bloom_pruning in the rest of the code.

Can you provide some figures on the performance impact of the bloom filter?

Best,
-Hannes

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