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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/09/12 21:48:00 UTC

[jira] [Commented] (SPARK-21988) Add default stats to StreamingExecutionRelation

    [ https://issues.apache.org/jira/browse/SPARK-21988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16163714#comment-16163714 ] 

Apache Spark commented on SPARK-21988:
--------------------------------------

User 'joseph-torres' has created a pull request for this issue:
https://github.com/apache/spark/pull/19212

> 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
>
> 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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