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https://issues.apache.org/jira/browse/CALCITE-2173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16836862#comment-16836862
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Lai Zhou commented on CALCITE-2173:
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[~masayuki038], I know what you mean. This Arrow adapter is just an adapter to
connect the datasource in arrow format.
as you said, executing the query in parallel is a good way to improve
performance.
Another way is to organize the in-memory data in columnar format, enable
vectorized expression execution.
Both of above two way need to rewrite the implementations of operators.
> Sample implementation of ArrowAdapter
> -------------------------------------
>
> Key: CALCITE-2173
> URL: https://issues.apache.org/jira/browse/CALCITE-2173
> Project: Calcite
> Issue Type: Improvement
> Reporter: Masayuki Takahashi
> Priority: Minor
>
> I try to implement Apache Arrow adaper.
> [https://github.com/masayuki038/calcite/tree/arrow2/arrow/src/main/java/org/apache/calcite/adapter/arrow]
> Issues:
> * Add ArrowJoin, ArrowUnion, etc..
> * This Arrow Adapter use org.apache.calcite.adapter.enumerable.PhysTypeImpl.
> So I have added 'of' method on PhysType to create PhysTypeImpl instance since
> it can't access from arrow package.
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