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https://issues.apache.org/jira/browse/TRAFODION-1654?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Qifan Chen resolved TRAFODION-1654.
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Resolution: Fixed
> Need to check the UECs on predicate-less key columns when consider MDAM
> -----------------------------------------------------------------------
>
> Key: TRAFODION-1654
> URL: https://issues.apache.org/jira/browse/TRAFODION-1654
> Project: Apache Trafodion
> Issue Type: Bug
> Components: sql-cmp
> Reporter: Qifan Chen
> Assignee: Qifan Chen
> Labels: performance
>
> When some key columns are predicate less, the current heuristics does not
> consider the UECs of these key columns, especially when the UECs are high.
> A better heuristics is to compute the product of all such UECs and assure the
> product is within a threshold.
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