Tathagata Das created SPARK-22278:
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Summary: Expose current event time watermark and current
processing time in GroupState
Key: SPARK-22278
URL: https://issues.apache.org/jira/browse/SPARK-22278
Project: Spark
Issue Type: Sub-task
Components: Structured Streaming
Affects Versions: 2.2.0
Reporter: Tathagata Das
Assignee: Tathagata Das
Complex state-updating and/or timeout-handling logic in mapGroupsWithState
functions may require taking decisions based on the current event-time
watermark and/or processing-time. Currently, you can use the sql function
`current_timestamp` to get the current processing time, but it needs to passed
inserted in every row with a select, and then passed through the encoder, which
isnt efficient. Furthermore, there is no way to get the current watermark.
This JIRA is to expose them through the GroupState API.
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