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Simon Willnauer commented on LUCENE-2868: ----------------------------------------- bq. I can share a generic reflection-based visitor that's somewhat more handy than default visitor pattern in java. Earwin - I think we should make a new issue and get something like that implemented in there which is more general than what I just sketched out. If you could share your code that would be awesome! > It should be easy to make use of TermState; rewritten queries should be > shared automatically > -------------------------------------------------------------------------------------------- > > Key: LUCENE-2868 > URL: https://issues.apache.org/jira/browse/LUCENE-2868 > Project: Lucene - Java > Issue Type: Improvement > Components: Query/Scoring > Reporter: Karl Wright > Attachments: query-rewriter.patch > > > When you have the same query in a query hierarchy multiple times, tremendous > savings can now be had if the user knows enough to share the rewritten > queries in the hierarchy, due to the TermState addition. But this is clumsy > and requires a lot of coding by the user to take advantage of. Lucene should > be smart enough to share the rewritten queries automatically. > This can be most readily (and powerfully) done by introducing a new method to > Query.java: > Query rewriteUsingCache(IndexReader indexReader) > ... and including a caching implementation right in Query.java which would > then work for all. Of course, all callers would want to use this new method > rather than the current rewrite(). -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org