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https://issues.apache.org/jira/browse/CALCITE-606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359407#comment-14359407
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Jacques Nadeau commented on CALCITE-606:
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I think we need to delay this until the next release. I don't think your patch
solves the problems. The goal is that a physical transformation provides a
trait that should be then leveraged in another transformation. My example is
simplistic on purpose. In that case one could move collation to be a logical
trait of the original node and resolve the issues. However, the set of
examples we're actually trying to solve do not allow this.
> Fix Trait Propagation and add test case
> ---------------------------------------
>
> Key: CALCITE-606
> URL: https://issues.apache.org/jira/browse/CALCITE-606
> Project: Calcite
> Issue Type: Bug
> Reporter: Jacques Nadeau
> Assignee: Jacques Nadeau
> Fix For: next
>
>
> Per my email to the dev list, it seems like we need to have a Trait
> propagation test case. Some things also seem broken. Dev list email:
> http://mail-archives.apache.org/mod_mbox/incubator-calcite-dev/201503.mbox/browser
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