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https://issues.apache.org/jira/browse/CALCITE-606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359416#comment-14359416
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Aman Sinha commented on CALCITE-606:
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This patch won't fix the distribution trait propagation, right ? If I have a
join condition on a1 = a2 followed by group-by on a1 and I have distributed the
left input of the join on a1, then we would do another re-distribution for the
group-by. This property is not known during logical planning, so I am not
sure how we can accomplish this in the new code.
> 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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