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https://issues.apache.org/jira/browse/CALCITE-1448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15592784#comment-15592784
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Julian Hyde edited comment on CALCITE-1448 at 10/20/16 7:49 PM:
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Fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/9f44aea5.
New instances of {{UnionMergeRule}} flatten trees of {{Intersect}} and
{{Minus}} operators into nodes that have more than 2 inputs.
New rules in {{PruneEmptyRules}} act on {{Intersect}} and {{Minus}} that have
empty inputs, either converting them to the empty relational expression or
removing empty inputs.
{{RelBuilder}} now allows {{Minus}} to have more than 2 inputs.
was (Author: julianhyde):
Fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/9f44aea5.
> Add rules to flatten and prune Intersect and Minus
> --------------------------------------------------
>
> Key: CALCITE-1448
> URL: https://issues.apache.org/jira/browse/CALCITE-1448
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Pengcheng Xiong
> Assignee: Julian Hyde
> Fix For: 1.11.0
>
>
> similar to current unionMergeRule.
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