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Posted to issues@spark.apache.org by "Xiao Li (JIRA)" <ji...@apache.org> on 2017/11/29 00:05:00 UTC
[jira] [Resolved] (SPARK-22637) CatalogImpl.refresh() has quadratic
complexity for a view
[ https://issues.apache.org/jira/browse/SPARK-22637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiao Li resolved SPARK-22637.
-----------------------------
Resolution: Fixed
Assignee: Herman van Hovell
Fix Version/s: 2.3.0
2.2.2
> 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
> Assignee: Herman van Hovell
> Priority: Minor
> Fix For: 2.2.2, 2.3.0
>
>
> {{org.apache.spark.sql.internal.CatalogImpl.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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