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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2018/03/04 18:06:00 UTC
[jira] [Commented] (LUCENE-8159) Add a copy constructor in
AutomatonQuery to copy directly the compiled automaton
[ https://issues.apache.org/jira/browse/LUCENE-8159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16385268#comment-16385268 ]
Adrien Grand commented on LUCENE-8159:
--------------------------------------
I understand why it helps in your case but searching over lots of fields is a bad practice so I would rather not design APIs specifically to address this problem. I don't like the idea of adding expert APIs to high-level queries like PrefixQuery, WildcardQuery or TermRangeQuery: there should be a single way to construct those queries and it should be simple.
> Add a copy constructor in AutomatonQuery to copy directly the compiled automaton
> --------------------------------------------------------------------------------
>
> Key: LUCENE-8159
> URL: https://issues.apache.org/jira/browse/LUCENE-8159
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Affects Versions: trunk
> Reporter: Bruno Roustant
> Assignee: David Smiley
> Priority: Major
> Attachments: 0001-Add-a-copy-constructor-in-AutomatonQuery-to-copy-dir.patch, LUCENE-8159.patch
>
>
> When the query is composed of multiple AutomatonQuery with the same automaton and which target different fields, it is much more efficient to reuse the already compiled automaton by copying it directly and just changing the target field.
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