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https://issues.apache.org/jira/browse/LUCENE-6305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14736775#comment-14736775
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Yonik Seeley commented on LUCENE-6305:
--------------------------------------

bq. In Lucene 6, BooleanQuery is unmodifiable, so you have to do the work 
anyways (or preserve the builder instance somewhere),

Correct... it's more about *how* expensive it is to build a boolean query.

> BooleanQuery.equals should ignore clause order
> ----------------------------------------------
>
>                 Key: LUCENE-6305
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6305
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-6305.patch, LUCENE-6305.patch
>
>
> BooleanQuery.equals is sensitive to the order in which clauses have been 
> added. So for instance "+A +B" would be considered different from "+B +A" 
> although it generates the same matches and scores.



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