[
https://issues.apache.org/jira/browse/SPARK-23703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16463189#comment-16463189
]
Jungtaek Lim commented on SPARK-23703:
--------------------------------------
Actually I haven't hear about multiple watermarks on same source, which makes
the things complicated. What I've heard is event-time window with single time
field, and watermark for such field. Do you have/hear actual use cases for this?
> Collapse sequential watermarks
> -------------------------------
>
> Key: SPARK-23703
> URL: https://issues.apache.org/jira/browse/SPARK-23703
> Project: Spark
> Issue Type: Sub-task
> Components: Structured Streaming
> Affects Versions: 2.4.0
> Reporter: Jose Torres
> Priority: Major
>
> When there are two sequential EventTimeWatermark nodes in a query plan, the
> topmost one overrides the column tracking metadata from its children, but
> leaves the nodes themselves untouched. When there is no intervening stateful
> operation to consume the watermark, we should remove the lower node entirely.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
