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https://issues.apache.org/jira/browse/SOLR-16243?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-16243:
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Summary: Compile SQL to a Streaming Expressions while visiting the Calcite
SQL parse tree (was: Compile SQL to Streaming Expressions while visiting the
Calcite SQL parse tree)
> Compile SQL to a Streaming Expressions while visiting the Calcite SQL parse
> tree
> --------------------------------------------------------------------------------
>
> Key: SOLR-16243
> URL: https://issues.apache.org/jira/browse/SOLR-16243
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Parallel SQL
> Reporter: Joel Bernstein
> Priority: Major
> Labels: RobustSQL
>
> Currently Solr SQL visits the SQL parse tree and builds up a set of
> properties that are passed to the SolrTable which creates the Streaming
> Expression object tree. This technique only works because we're not dealing
> yet with Joins. It won't be practical to express joins using the current
> approach. In order to support joins we'll need to build the Streaming
> Expression as we visit the parse tree and pass the expression directly to the
> SolrTable.
> This ticket will only implement existing SQL support using the direct
> compilation approach.
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