From: Heikki Linnakangas <heikki@enterprisedb.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Jan Urbański <j.urbanski@students.mimuw.edu.pl>
Cc: Postgres - Hackers <pgsql-hackers@postgresql.org>
Subject: Re: gsoc, text search selectivity and dllist enhancments
Date: Fri, 04 Jul 2008 10:32:32 +0300
Message-ID: <486DD210.9030400@enterprisedb.com> (raw)
In-Reply-To: <6233.1215113144@sss.pgh.pa.us>
References: <48649261.5040703@students.mimuw.edu.pl>
<6233.1215113144@sss.pgh.pa.us>
Tom Lane wrote:
> The data structure I'd suggest is a simple array of pointers
> to the underlying hash table entries. Since you have a predetermined
> maximum number of lexemes to track, you can just palloc the array once
> --- you don't need the expansibility properties of a list.
The number of lexemes isn't predetermined. It's 2 * (longest tsvector
seen so far), and we don't know beforehand how long the longest tsvector is.
repalloc()ing shouldn't be a problem, though.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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To: pgsql-hackers@postgresql.org
Cc: heikki@enterprisedb.com, tgl@sss.pgh.pa.us, j.urbanski@students.mimuw.edu.pl
Subject: Re: gsoc, text search selectivity and dllist enhancments
In-Reply-To: <486DD210.9030400@enterprisedb.com>
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