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https://issues.apache.org/jira/browse/SPARK-13092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust reassigned SPARK-13092:
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    Assignee: Michael Armbrust  (was: Sameer Agarwal)

> Track constraints in ExpressionSet
> ----------------------------------
>
>                 Key: SPARK-13092
>                 URL: https://issues.apache.org/jira/browse/SPARK-13092
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Sameer Agarwal
>            Assignee: Michael Armbrust
>
> Create a new ExpressionSet that operates similar to an AttributeSet for 
> keeping track of constraints. A nice addition to this will be to try and have 
> it do other type of canonicalization (i.e. don't allow both a = b and b = a).



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