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https://issues.apache.org/jira/browse/SOLR-14728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-14728:
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Description: A simple optimization can be put in place to massively improve
join performance when the TopLevelJoinQuery is performing a self join (same
core) and the *to* and *from* fields are the same field. In this scenario the
top level doc values ordinals can be used directly as a filter avoiding the
most expensive part of the join which is the bytes ref reconciliation between
the *to* and *from* fields. (was: A simple optimization can be put in place to
massively improve join performance when the TopLevelJoinQuery is performing a
self join (same core) and the *to* and *from* fields are the same field. In
this scenario the top level doc values ordinals can be used directly as a
filter avoiding the most expensive part of the join which is the bytes ref
reconciliation between the *to* and *from* fields. )
> Add self join optimization to the TopLevelJoinQuery
> ---------------------------------------------------
>
> Key: SOLR-14728
> URL: https://issues.apache.org/jira/browse/SOLR-14728
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Priority: Major
>
> A simple optimization can be put in place to massively improve join
> performance when the TopLevelJoinQuery is performing a self join (same core)
> and the *to* and *from* fields are the same field. In this scenario the top
> level doc values ordinals can be used directly as a filter avoiding the most
> expensive part of the join which is the bytes ref reconciliation between the
> *to* and *from* fields.
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