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https://issues.apache.org/jira/browse/SOLR-8593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15709176#comment-15709176
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Joel Bernstein edited comment on SOLR-8593 at 11/30/16 5:24 PM:
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One of things that is also not specifically handled is the HAVING clause.
I think we should push down this capability to Solr as well so we can perform
the HAVING logic on the worker nodes. In high cardinality use cases this will
be a big performance improvement.
We also need to develop a HavingStream to manage the having logic. I'll start
the work for the HavingStream in this branch as it directly supports the
Calcite integration.
was (Author: joel.bernstein):
One of things that is also not specifically handing is the HAVING clause.
I think we should push down this capability to Solr as well so we can perform
the HAVING logic on the worker nodes. In high cardinality use cases this will
be a big performance improvement.
We also need to develop a HavingStream to manage the having logic. I'll start
the work for the HavingStream in this branch as it directly supports the
Calcite integration.
> 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
> Assignee: Joel Bernstein
> Attachments: SOLR-8593.patch
>
>
> 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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