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From "Xiao Li (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-22637) CatalogImpl.refresh() has quadratic complexity for a view
Date Wed, 29 Nov 2017 00:05:00 GMT

     [ 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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