[
https://issues.apache.org/jira/browse/SPARK-53687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dongjoon Hyun updated SPARK-53687:
----------------------------------
Parent: SPARK-51727
Issue Type: Sub-task (was: Task)
> Introduce WATERMARK clause in SQL statement
> -------------------------------------------
>
> Key: SPARK-53687
> URL: https://issues.apache.org/jira/browse/SPARK-53687
> Project: Spark
> Issue Type: Sub-task
> Components: Declarative Pipelines, SQL, Structured Streaming
> Affects Versions: 4.1.0
> Reporter: Jungtaek Lim
> Assignee: Jungtaek Lim
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.1.0
>
>
> With Spark Declarative Pipeline, Apache Spark supports to define the
> streaming query with SQL statement (Flow or Streaming Table).
> The SQL statement is expected to be composed with streaming semantic (STREAM
> relation), and this converts the query part to be streaming. With this, the
> query can be stateful, e.g. aggregation will be a streaming aggregation,
> deduplication and stream-stream join, etc. And in majority of cases, we
> require watermark to be defined per source for the stateful query to work
> properly.
> Databricks introduced WATERMARK clause to cover this functionality in
> Lakeflow Declarative Pipeline, but when open sourcing this, we missed to
> introduce this clause. This ticket is to open source WATERMARK clause.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
