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From "Herman van Hovell (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-22637) CatalogImpl.refresh() has quadratic complexity for a view
Date Tue, 28 Nov 2017 21:06:01 GMT
Herman van Hovell created SPARK-22637:
-----------------------------------------

             Summary: CatalogImpl.refresh() has quadratic complexity for a view
                 Key: SPARK-22637
                 URL: https://issues.apache.org/jira/browse/SPARK-22637
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.2.0
            Reporter: Herman van Hovell
            Priority: Minor


{{org.apache.spark.sql.internal.refreshTable}} uses {{foreach(..)}} to refresh all tables
in a view. This traverses all nodes in the subtree and calls {{LogicalPlan.refresh()}} on
these nodes. However {{LogicalPlan.refresh()}} is also refreshing its children, as a result
refreshing a large view can be quite expensive.



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