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From "Steven Phillips (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CALCITE-2751) MetadataCycleException not handled in VolcanoRelMetadataProvider
Date Fri, 21 Dec 2018 19:50:00 GMT
Steven Phillips created CALCITE-2751:
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             Summary: MetadataCycleException not handled in VolcanoRelMetadataProvider
                 Key: CALCITE-2751
                 URL: https://issues.apache.org/jira/browse/CALCITE-2751
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Steven Phillips
            Assignee: Julian Hyde


If the RelSubset has no best RelNode, we iterate through all of the RelNodes until we find
one that has appropriate Metadata. But if the RelNode we choose has already been visited,
the CyclicMetadataException is thrown, but not caught. We should catch the exception and
try again on another RelNode.



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