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https://issues.apache.org/jira/browse/CALCITE-1849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-1849.
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Resolution: Fixed
Fix Version/s: 1.14.0
Fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/e43520a8.
> Support sub-queries (RexSubQuery) in RelToSqlConverter
> ------------------------------------------------------
>
> Key: CALCITE-1849
> URL: https://issues.apache.org/jira/browse/CALCITE-1849
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.12.0
> Reporter: Zhiqiang He
> Assignee: Zhiqiang He
> Fix For: 1.14.0
>
>
> RelToSqlConverter does not currently support sub-queries (RexSubQuery), but
> it should.
> SqlToRelConverter, in the default configuration, converts sub-queries into
> Join clause. But when SqlToRelConverter.Config.expand = false, it does not
> convert them to Join. And that causes problems because RelToSqlConverter
> cannot handle them.
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