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Posted to issues@lucene.apache.org by "Alan Woodward (Jira)" <ji...@apache.org> on 2020/01/15 15:49:00 UTC

[jira] [Resolved] (LUCENE-9068) Build FuzzyQuery automata up-front

     [ https://issues.apache.org/jira/browse/LUCENE-9068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan Woodward resolved LUCENE-9068.
-----------------------------------
    Fix Version/s: 8.5
       Resolution: Fixed

> Build FuzzyQuery automata up-front
> ----------------------------------
>
>                 Key: LUCENE-9068
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9068
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>            Priority: Major
>             Fix For: 8.5
>
>          Time Spent: 2.5h
>  Remaining Estimate: 0h
>
> FuzzyQuery builds a set of levenshtein automata (one for each possible edit distance) at rewrite time, and passes them between different TermsEnum invocations using an attribute source.  This seems a bit needlessly complicated, and also means that things like visiting a query end up building the automata again.  We should instead build the automata at query construction time, which is how AutomatonQuery does it.



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