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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2649) FieldCache should include a BitSet for matching docs
Date Fri, 17 Sep 2010 19:05:34 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910736#action_12910736
] 

Yonik Seeley commented on LUCENE-2649:
--------------------------------------

bq. What if I care, but somethign else (that does not care) asks for the value first? Seems
odd to have so much depend on who asks for the value first

As long as it *can* be passed everywhere that matters, then it's up to the application - which
knows if it ever needs the missing values or not for that field.  For solr, we could make
it configurable per-field... but I'd prob default it to ON to avoid unpredictable weirdness.

bq. What if a filter creates the cache before the SortField?

If we have a filter that uses the field cache, then it should also be able to specify the
same stuff that SortField can.

> 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
>
>
> 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.

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