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https://issues.apache.org/jira/browse/LUCENE-1708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12726580#action_12726580
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Shai Erera commented on LUCENE-1708:
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There is a paragraph in CHANGES under "Changes to Runtime Behavior" that
explains this. I think it was on the email thread and not on this issue, that
people preferred the runtime change vs. the deprecation and a new method name
for document(), under the assumption that it's very unlikely that someone
relies on IndexReader.document() checking for isDeleted (i.e., it passes a
document which may or may not be deleted).
> Improve the use of isDeleted in the indexing code
> -------------------------------------------------
>
> Key: LUCENE-1708
> URL: https://issues.apache.org/jira/browse/LUCENE-1708
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Reporter: Shai Erera
> Assignee: Michael McCandless
> Fix For: 2.9
>
> Attachments: LUCENE-1708.patch, LUCENE-1708.patch
>
>
> A spin off from here:
> http://www.nabble.com/Some-thoughts-around-the-use-of-reader.isDeleted-and-hasDeletions-td23931216.html.
> Two changes:
> # Optimize SegmentMerger work when a reader has no deletions.
> # IndexReader.document() will no longer check if the document is deleted.
> Will post a patch shortly
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