Liwei Lin created SPARK-20441:
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Summary: Within the same streaming query, one StreamingRelation
should only be transformed to one StreamingExecutionRelation
Key: SPARK-20441
URL: https://issues.apache.org/jira/browse/SPARK-20441
Project: Spark
Issue Type: Bug
Components: Structured Streaming
Affects Versions: 2.1.0, 2.1.1, 2.1.2, 2.2.0
Reporter: Liwei Lin
Within the same streaming query, when one StreamingRelation is referred
multiple times -- e.g. df.union(df) -- we should transform it only to one
StreamingExecutionRelation, instead of two or more different
StreamingExecutionRelations.
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