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https://issues.apache.org/jira/browse/SPARK-54560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ziqi Liu updated SPARK-54560:
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Summary: Safe type casting in `QueryPlan._subqueries` (was:
QueryPlan._subqueries force type casting)
> Safe type casting in `QueryPlan._subqueries`
> --------------------------------------------
>
> Key: SPARK-54560
> URL: https://issues.apache.org/jira/browse/SPARK-54560
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Ziqi Liu
> Priority: Major
>
> `QueryPlan._subqueries` is dangerous because it force type casting ([code
> pointer|https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala#L524])
>
> Imagine a `SparkPlan` instance invoke this API where some of its subqueries
> could be `LogicalPlan`(this could happen in AQE where logical->phyiscal
> planning happen respectively in main/sub queries and they could be
> out-of-sync at a specific point.
>
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