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https://issues.apache.org/jira/browse/LUCENE-6332?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Khludnev updated LUCENE-6332:
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Description:
I want to contribute the subj which should do something like ..{{WHERE EXISTS
(SELECT 1 FROM fromSearcher.search(fromQuery) WHERE fromField=toField)}}. It
turns out, that it can be returned by the current method
{{createJoinQuery(...ScoreMode.None)}}
* at first, it should run {{fromQuery}} first, collect {{fromField}} into
{{BytesRefHash}} by {{TermsCollector}}, like it's done now
* then it should return query with _TwoPhase_ Scorer
* which obtains {{toField}} docValue on {{matches()}} and check term for
existence in {{BytesRefHash}}
Do you think it's ever useful? if you do, I can bake a patch.
Anyway, suggest the better API eg separate method, or enum and actual name!
was:
I want to contribute the subj which should do something like ..{{WHERE EXISTS
(SELECT 1 FROM fromSearcher.search(fromQuery) WHERE fromField=toField)}}. It
turns out, that it can be returned by the current method
{{createJoinQuery(...ScoreMode.None)}}
* at first, it should run {{fromQuery}} first, collect {{fromField}} into
{{BytesRefHash}} by {{TermsCollector}}, like it's done now
* then it should return query with _TwoPhase_ Scorer
* which obtains {{toField}} on {{matches()}} and check term for existence in
{{BytesRefHash}}
Do you think it's ever useful? if you do, I can bake a patch.
Anyway, suggest the better API eg separate method, or enum and actual name!
Summary: join query scanning "toField" docValue (was:
JoinUtil.createSemiJoinQuery())
*ok* referring to _semijoin_ doesn't really make sense, because all Lucene join
queries are semijoins. Hence, I rename the summary, though it still lacks of
clarity.
Any feedback?
> join query scanning "toField" docValue
> -----------------------------------------
>
> Key: LUCENE-6332
> URL: https://issues.apache.org/jira/browse/LUCENE-6332
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/join
> Affects Versions: 5.0
> Reporter: Mikhail Khludnev
>
> I want to contribute the subj which should do something like ..{{WHERE EXISTS
> (SELECT 1 FROM fromSearcher.search(fromQuery) WHERE fromField=toField)}}. It
> turns out, that it can be returned by the current method
> {{createJoinQuery(...ScoreMode.None)}}
> * at first, it should run {{fromQuery}} first, collect {{fromField}} into
> {{BytesRefHash}} by {{TermsCollector}}, like it's done now
> * then it should return query with _TwoPhase_ Scorer
> * which obtains {{toField}} docValue on {{matches()}} and check term for
> existence in {{BytesRefHash}}
> Do you think it's ever useful? if you do, I can bake a patch.
> Anyway, suggest the better API eg separate method, or enum and actual name!
>
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