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From "Tim Smith (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1810) Add a LATENT FieldSelectorResult
Date Fri, 14 Aug 2009 21:07:14 GMT
Add a LATENT FieldSelectorResult
--------------------------------

                 Key: LUCENE-1810
                 URL: https://issues.apache.org/jira/browse/LUCENE-1810
             Project: Lucene - Java
          Issue Type: Wish
          Components: Search
    Affects Versions: 2.4
            Reporter: Tim Smith


I propose adding LATENT FieldSelectorResult

this would be similar to LAZY_LOAD except that it would NEVER cache the stored value

This will be useful for very large fields that should always go direct to disk (because they
will take so much memory)
when caching Documents returned from a Searcher, the large field may be initially requested
as LAZY_LOAD, however once someone reads this field, it will then get locked into memory.
if this Document (and others like it) are cached, it can start to use a very large amount
of memory for these fields

Contract for FieldSelectorResult.LATENT should be that it will always be pulled direct from
the IndexInput and never be persisted in memory as part of a Fieldable

I could prepare a patch if desired



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