Michael Armbrust created SPARK-19067:
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Summary: mapWithState Style API
Key: SPARK-19067
URL: https://issues.apache.org/jira/browse/SPARK-19067
Project: Spark
Issue Type: New Feature
Components: Structured Streaming
Reporter: Michael Armbrust
Priority: Critical
Right now the only way to do stateful operations with with Aggregator or UDAF.
However, this does not give users control of emission or expiration of state
making it hard to implement things like sessionization. We should add a more
general construct (probably similar to {{mapWithState}}) to structured
streaming.
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