Mailing-List: contact dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@lucene.apache.org
Received-SPF: neutral (nike.apache.org: local policy)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.co.uk;
  h=DKIM-Signature:Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Content-Transfer-Encoding:Message-Id:References:To:X-Mailer;
  b=BuY3SdrcQa10DruXg1VPDR2XigRAs7IxyOTnrbh+KmPJtBjmzyMoaJb6+w/FHYit1ARcCza2fna4I02LaFQ2aQ8wDNkPOea1sVn8nKUHbW13jW5jWwOus5GGxfiM9eIXtPqiWzuXSK6BPt00slfRvM6L3x7DNB8e9lV9p/wcarU=
  ;
Content-Type: text/plain; charset=us-ascii
Mime-Version: 1.0 (Apple Message framework v1081)
Subject: Re: Using filters to speed up queries
From: Mark Harwood <markharw00d@yahoo.co.uk>
In-Reply-To: <AANLkTi=qfADdwNZyngp-wzp3LyYXCr6+DeKHf8R1yUhy@mail.gmail.com>
Date: Sat, 23 Oct 2010 23:44:15 +0100
Content-Transfer-Encoding: quoted-printable
Message-Id: <F250FC89-C9C8-4A20-BE56-464E8B7CD0CD@yahoo.co.uk>
References: <AANLkTi=qfADdwNZyngp-wzp3LyYXCr6+DeKHf8R1yUhy@mail.gmail.com>
To: dev@lucene.apache.org

Look at BooleanQuery with 2 "must" clauses - one for the query, one for =
a ConstantScoreQuery wrapping the filter.
BooleanQuery should then use automatically use skips when reading =
matching docs from the main query and skip to the next docs identified =
by the filter.
Give it a try, otherwise you may be looking at using separate indexes


On 23 Oct 2010, at 23:18, Khash Sajadi wrote:

> My index contains documents for different users. Each document has the =
user id as a field on it.
>=20
> There are about 500 different users with 3 million documents.
>=20
> Currently I'm calling Search with the query (parsed from user) and =
FieldCacheTermsFilter for the user id.
>=20
> It works but the performance is not great.
>=20
> Ideally, I would like to perform the search only on the documents that =
are relevant, this should make it much faster. However, it seems =
Search(Query, Filter) runs the query first and then applies the filter.
>=20
> Is there a way to improve this? (i.e. run the query only on a subset =
of documents)
>=20
> Thanks


---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org