Mailing-List: contact dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@lucene.apache.org
Message-ID: <17632867.347831285176575214.JavaMail.jira@thor>
Date: Wed, 22 Sep 2010 13:29:35 -0400 (EDT)
From: "Ryan McKinley (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-2649) FieldCache should include a BitSet
 for matching docs
In-Reply-To: <3738400.244411284693932822.JavaMail.jira@thor>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913672#action_12913672 ] 

Ryan McKinley commented on LUCENE-2649:
---------------------------------------

bq. Hmm... I'd rather make an exception to 3.x, ie, allow the addition of this method to the interface, than confuse the 4.x API, going forward, with 2 classes?

That is OK with me.  Would be cleaner and simpler.  (though semantically it does not make sense to me -- why ask the parser what to cache?)


bq. >>    This does cache a MatchAllBits even when 'cacheValidBits' is false, since that is small (a small class with one int)
bq. Hmm... but if I pass false here, it shouldn't spend any time allocating the bit set, building it, checking the bit set for "all bits set", etc.?

Well it does not try *hard*, only if numDocs==maxDocs, it does not look at anything.  If the cost of caching new MatchAllBits( maxDocs ) isn't worth occasional win by knowing all the values are valid, then I will remove it.


bq. So how about we add a getBits(field)

Interesting... i'll mess for a bit and let you know what I think :)

rather then throwing an exception, that might be a flag, since I could imagin many thigns would use the Bits if they exist and do something else if they dont


> FieldCache should include a BitSet for matching docs
> ----------------------------------------------------
>
>                 Key: LUCENE-2649
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2649
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Ryan McKinley
>             Fix For: 4.0
>
>         Attachments: LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch
>
>
> The FieldCache returns an array representing the values for each doc.  However there is no way to know if the doc actually has a value.
> This should be changed to return an object representing the values *and* a BitSet for all valid docs.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


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