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Posted to dev@lucene.apache.org by "Grant Ingersoll (JIRA)" <ji...@apache.org> on 2006/12/29 15:53:25 UTC

[jira] Assigned: (LUCENE-762) [PATCH] Efficiently retrieve sizes of field values

     [ http://issues.apache.org/jira/browse/LUCENE-762?page=all ]

Grant Ingersoll reassigned LUCENE-762:
--------------------------------------

    Assignee: Grant Ingersoll

> [PATCH] Efficiently retrieve sizes of field values
> --------------------------------------------------
>
>                 Key: LUCENE-762
>                 URL: http://issues.apache.org/jira/browse/LUCENE-762
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Store
>    Affects Versions: 2.1
>            Reporter: Chuck Williams
>         Assigned To: Grant Ingersoll
>         Attachments: SizeFieldSelector.patch
>
>
> Sometimes an application would like to know how large a document is before retrieving it.  This can be important for memory management or choosing between algorithms, especially in cases where documents might be very large.
> This patch extends the existing FieldSelector mechanism with two new FieldSelectorResults:  SIZE and SIZE_AND_BREAK.  SIZE creates fields on the retrieved document that store field sizes instead of actual values.  SIZE_AND_BREAK is especially efficient if one field comprises the bulk of the document size (e.g., the body field) and can thus be used as a reasonable size approximation.

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