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From "Grant Ingersoll (JIRA)" <>
Subject [jira] Updated: (LUCENE-762) [PATCH] Efficiently retrieve sizes of field values
Date Fri, 29 Dec 2006 14:53:27 GMT
     [ ]

Grant Ingersoll updated LUCENE-762:

    Lucene Fields:   (was: [New, Patch Available])
         Priority: Minor  (was: Major)

> [PATCH] Efficiently retrieve sizes of field values
> --------------------------------------------------
>                 Key: LUCENE-762
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Store
>    Affects Versions: 2.1
>            Reporter: Chuck Williams
>         Assigned To: Grant Ingersoll
>            Priority: Minor
>         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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