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https://issues.apache.org/jira/browse/SPARK-22637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16269472#comment-16269472
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Apache Spark commented on SPARK-22637:
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User 'hvanhovell' has created a pull request for this issue:
https://github.com/apache/spark/pull/19837
> 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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