From: mark@mark.mielke.cc
To: Merlin Moncure <merlin.moncure@rcsonline.com>
Cc: Kelly Burkhart <kelly@tradebotsystems.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: 8.x index insert performance
Date: Mon, 31 Oct 2005 14:35:47 -0500
Message-ID: <20051031193547.GA3311@mark.mielke.cc> (raw)
In-Reply-To: <6EE64EF3AB31D5448D0007DD34EEB3417DD725@Herge.rcsinc.local>
References: <6EE64EF3AB31D5448D0007DD34EEB3417DD725@Herge.rcsinc.local>
On Mon, Oct 31, 2005 at 12:32:03PM -0500, Merlin Moncure wrote:
> if that index is causing the problem, you may want to consider setting
> up partial index to exclude null values.
Hey all.
Pardon my ignorance. :-)
I've been trying to figure out whether null values are indexed or not from
the documentation. I was under the impression, that null values are not
stored in the index. Occassionally, though, I then see a suggestion such
as the above, that seems to indicate to me that null values *are* stored
in the index, allowing for the 'exclude null values' to have effect?
Which is it? :-)
Thanks,
mark
--
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To: pgsql-performance@postgresql.org
Cc: mark@mark.mielke.cc, merlin.moncure@rcsonline.com, kelly@tradebotsystems.com
Subject: Re: 8.x index insert performance
In-Reply-To: <20051031193547.GA3311@mark.mielke.cc>
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