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https://issues.apache.org/jira/browse/SOLR-8593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15207350#comment-15207350
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Kevin Risden commented on SOLR-8593:
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[~joel.bernstein] I was able to make some really good progress on the above
linked piece. Its coming together just need to add the optimizations now.
I have been testing with https://github.com/risdenk/solr-calcite-example which
is the same Calcite code isolated from Solr. It enables me to easily check the
explain plan and data types. I'll probably bang on it some more tomorrow to
integrate the push downs for project, filter, and sort. The hooks are all there
just need to convert from the Cassandra example code to Solr syntax.
> Integrate Apache Calcite into the SQLHandler
> --------------------------------------------
>
> Key: SOLR-8593
> URL: https://issues.apache.org/jira/browse/SOLR-8593
> Project: Solr
> Issue Type: Improvement
> Reporter: Joel Bernstein
> Fix For: master
>
>
> The Presto SQL Parser was perfect for phase one of the SQLHandler. It was
> nicely split off from the larger Presto project and it did everything that
> was needed for the initial implementation.
> Phase two of the SQL work though will require an optimizer. Here is where
> Apache Calcite comes into play. It has a battle tested cost based optimizer
> and has been integrated into Apache Drill and Hive.
> This work can begin in trunk following the 6.0 release. The final query plans
> will continue to be translated to Streaming API objects (TupleStreams), so
> continued work on the JDBC driver should plug in nicely with the Calcite work.
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