[ http://issues.apache.org/jira/browse/LUCENE-558?page=all ]
Chuck Williams updated LUCENE-558:
----------------------------------
Attachment: LuceneTrunk.patch
> Selective field loading
> -----------------------
>
> Key: LUCENE-558
> URL: http://issues.apache.org/jira/browse/LUCENE-558
> Project: Lucene - Java
> Type: New Feature
> Components: Index
> Versions: 2.0
> Environment: All
> Reporter: Chuck Williams
> Attachments: LuceneTrunk.patch
>
> Provides a new api, IndexReader.document(int doc, String[] fields). A
> document containing only the specified fields is created. The other fields
> of the document are not loaded, although unfortunately uncompressed strings
> still have to be scanned because the length information in the index is for
> UTF-8 encoded chars and not bytes. This is useful for applications that need
> quick access to a small subset of the fields. It can be used in conjunction
> with or for some uses instead of ParallelReader.
> This is a much smaller change for a simpler use case than Lucene-545. No
> existing API's are affected.
> All the tests pass and new tests are added to verify the feature.
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