[jira] Commented: (LUCENE-1920) Make MultiReader.isOptimized() return a useful result

["Mark Miller (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-1920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757236#action_12757236 ] 

Mark Miller commented on LUCENE-1920:
-------------------------------------

An optimized index is a single segment - MultiReader reads from multiple segments, and so I would argue its not optimized and should return false.

If InstantiatedIndex will work when all of the segments MultiReader refs are optimized somehow, I believe the workaround belongs in InstantiatedIndex.

Counterpoints?

> Make MultiReader.isOptimized() return a useful result
> -----------------------------------------------------
>
>                 Key: LUCENE-1920
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1920
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Bernd Fondermann
>            Priority: Minor
>         Attachments: MultiReader_isOptimized.patch
>
>
> The MultiReader statically returns FALSE on any isOptimized() call.
> This makes it unusable as the source index for an InstantiatedIndex, which checks initially if the source index is optimized and aborts if not.
> The attached patch iterates all sub readers and returns TRUE if all of them are optimized.

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