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https://issues.apache.org/jira/browse/SPARK-15692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan updated SPARK-15692:
--------------------------------
Assignee: Sean Zhong
> Improves the explain output of several physical plans by displaying embedded
> logical plan in tree style
> -------------------------------------------------------------------------------------------------------
>
> Key: SPARK-15692
> URL: https://issues.apache.org/jira/browse/SPARK-15692
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Sean Zhong
> Assignee: Sean Zhong
> Priority: Minor
> Fix For: 2.0.0
>
>
> Some physical plan contains a embedded logical plan, for example, {code}cache
> tableName query{code} maps to:
> {code}
> case class CacheTableCommand(
> tableName: String,
> plan: Option[LogicalPlan],
> isLazy: Boolean)
> extends RunnableCommand
> {code}
> It is easier to read the explain output if we can display the `plan` in tree
> style.
> Before change:
> {code}
> scala> Seq((1,2)).toDF().createOrReplaceTempView("testView")
> scala> spark.sql("cache table testView2 select * from testView").explain()
> == Physical Plan ==
> ExecutedCommand CacheTableCommand testView2, Some('Project [*]
> +- 'UnresolvedRelation `testView`, None
> ), false
> {code}
> After change:
> {code}
> scala> spark.sql("cache table testView2 select * from testView").explain()
> == Physical Plan ==
> ExecutedCommand
> : +- CacheTableCommand testView2, false
> : : +- 'Project [*]
> : : +- 'UnresolvedRelation `testView`, None
> {code}
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