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https://issues.apache.org/jira/browse/CALCITE-88?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-88:
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Summary: Add collation as a trait and a kind of RelNode metadata (was:
Allow for preserving traits in the op tree)
> Add collation as a trait and a kind of RelNode metadata
> -------------------------------------------------------
>
> Key: CALCITE-88
> URL: https://issues.apache.org/jira/browse/CALCITE-88
> Project: Calcite
> Issue Type: Bug
> Reporter: GitHub Import
> Assignee: Julian Hyde
> Labels: github-import
>
> Allow for traits to propagate up the tree.
> Ex: J2-F-J1
> If J1 uses SortMerge for Join then filter carries forward sordidness trait on
> join keys; If J2 is joining on same keys then it can take advantage of the
> sordidness trait of its child.
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/julianhyde/optiq/issues/88
> Created by: [jpullokkaran|https://github.com/jpullokkaran]
> Labels:
> Created at: Thu Nov 28 00:21:59 CET 2013
> State: open
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