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From "Yonik Seeley (JIRA)" <>
Subject [jira] Commented: (LUCENE-2649) FieldCache should include a BitSet for matching docs
Date Fri, 17 Sep 2010 13:41:33 GMT


Yonik Seeley commented on LUCENE-2649:

bq. I guess we need to be able to manually configure FieldCache with some kind of FieldType.

I don't know how well that would work.  For one, there's only one FieldCache, so configuring
it with anything seems problematic.
Also, if I have to list out all the fields I'm going to use, that's another big step backwards.

A factory would be a pretty straightforward way to increase the power, by allowing users to
populate the entry through any mechanism, and optionally do extra calculations when the entry
is populated (think statistics, sum-of-squares, etc).

> FieldCache should include a BitSet for matching docs
> ----------------------------------------------------
>                 Key: LUCENE-2649
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Ryan McKinley
>             Fix For: 4.0
>         Attachments: 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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