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https://issues.apache.org/jira/browse/LUCENE-6305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14736715#comment-14736715
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Yonik Seeley commented on LUCENE-6305:
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bq. Actually I think of this change more as a bug fix than as an optimization
If you have a system that always generates queries the same way (and there are
quite a few of those who use lucene/solr), then the extra work is unwanted
overhead. And in some cases, the overhead could be significant (very very
large queries... i've seen examples).
One could also check for more complex transformations to make apparently
unequal boolean queries equal, and that would be great, but the cost should not
be imposed on those who don't need/want it.
Then think about taking one of those large queries and programmatically adding
a single clause... all that work needs to be re-done?
The same as checking for duplicate negative clauses - great if you have a
system that could generate them I guess, but one should be able to opt-out.
There are so many users, we need to continue to design for the corner cases as
well as the mainstream, as long as those needs don't conflict. All that means
in this case is to have a way to opt out of all the checking and say "just
create me a weight with these clauses". I guess that could just be an expert
static method on BooleanQuery?
{code}
/** @lucene.expert */
public static Weight createWeightFrom(List<BooleanClause> clauses)
{code}
> 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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