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List:       lucene-dev
Subject:    [jira] Updated: (LUCENE-1194) Add deleteByQuery to IndexWriter
From:       "Michael McCandless (JIRA)" <jira () apache ! org>
Date:       2008-02-26 15:56:55
Message-ID: 1574562580.1204041415014.JavaMail.jira () brutus
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     [ https://issues.apache.org/jira/browse/LUCENE-1194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
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Michael McCandless updated LUCENE-1194:
---------------------------------------

    Attachment: LUCENE-1194.patch

Attached patch.  All tests pass.

> Add deleteByQuery to IndexWriter
> --------------------------------
> 
> Key: LUCENE-1194
> URL: https://issues.apache.org/jira/browse/LUCENE-1194
> Project: Lucene - Java
> Issue Type: New Feature
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.4
> 
> Attachments: LUCENE-1194.patch
> 
> 
> This has been discussed several times recently:
> http://markmail.org/message/awlt4lmk3533epbe
> http://www.gossamer-threads.com/lists/lucene/java-user/57384#57384
> If we add deleteByQuery to IndexWriter then this is a big step towards
> allowing IndexReader to be readonly.
> I took the approach suggested in that first thread: I buffer delete
> queries just like we now buffer delete terms, holding the max docID
> that the delete should apply to.
> Then, I also decoupled flushing deletes (mapping term or query -->
> actual docIDs that need deleting) from flushing added documents, and
> now I flush deletes only when a merge is started, or on commit() or
> close().  SegmentMerger now exports the docID map it used when
> merging, and I use that to renumber the max docIDs of all pending
> deletes.
> Finally, I turned off tracking of memory usage of pending deletes
> since they now live beyond each flush.  Deletes are now only
> explicitly flushed if you set maxBufferedDeleteTerms to something
> other than DISABLE_AUTO_FLUSH.  Otherwise they are flushed at the
> start of every merge.

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