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https://issues.apache.org/jira/browse/SPARK-18261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15639642#comment-15639642
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Apache Spark commented on SPARK-18261:
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User 'lw-lin' has created a pull request for this issue:
https://github.com/apache/spark/pull/15786
> Add statistics to MemorySink for joining
> -----------------------------------------
>
> Key: SPARK-18261
> URL: https://issues.apache.org/jira/browse/SPARK-18261
> Project: Spark
> Issue Type: New Feature
> Components: SQL, Structured Streaming
> Affects Versions: 2.0.2
> Reporter: Burak Yavuz
>
> Right now, there is no way to join the output of a memory sink with any table:
> {code}
> UnsupportedOperationException: LeafNode MemoryPlan must implement statistics
> {code}
> Being able to join snapshots of memory streams with tables would be nice.
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