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From "Ryan McKinley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2649) FieldCache should include a BitSet for matching docs
Date Fri, 17 Sep 2010 15:14:33 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910618#action_12910618
] 

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

This is a band-aid, but we could consider adding something like:
{code:java}
  public void setCacheValidBitsForFields( Set<String> names );
{code}
on FieldCache, then checking if the field is in that set before making the BitSet

When solr reads the schema, it could look for any fields have sortMissingLast and then call:
{code:java}
  FieldCache.DEFAULT.setCacheValidBitsForFields()
{code}

The factory idea also sounds good, but i don't see how would work without big big changes

> 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
>
>
> 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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