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https://issues.apache.org/jira/browse/CALCITE-4017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17112802#comment-17112802
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Haisheng Yuan commented on CALCITE-4017:
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Yes. SortUnionTransposeRule will be useless after this JIRA is done. Basically,
sort operator should be prohibited to participate any rule transformation.
> Implement trait propagation for Enumerable Setop
> -------------------------------------------------
>
> Key: CALCITE-4017
> URL: https://issues.apache.org/jira/browse/CALCITE-4017
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Haisheng Yuan
> Priority: Major
>
> Mainly for Union operator, not sure about Minus and Intersect. I haven't
> check how is Enumerable Minus, Intersect's executor implemented.
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