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https://issues.apache.org/jira/browse/SPARK-21988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu reopened SPARK-21988:
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> Add default stats to StreamingExecutionRelation
> -----------------------------------------------
>
> Key: SPARK-21988
> URL: https://issues.apache.org/jira/browse/SPARK-21988
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 2.2.0
> Reporter: Jose Torres
> Assignee: Jose Torres
> Fix For: 2.3.0
>
>
> StreamingExecutionRelation currently doesn't implement stats.
> This makes some sense, but unfortunately the LeafNode contract requires that
> nodes which survive analysis implement stats, and StreamingExecutionRelation
> can indeed survive analysis when running explain() on a streaming dataframe.
> This value won't ever be used during execution, because
> StreamingExecutionRelation does *not* survive analysis on the execution path;
> it's replaced with each batch.
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