[
https://issues.apache.org/jira/browse/FLINK-12665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ASF GitHub Bot updated FLINK-12665:
-----------------------------------
Labels: pull-request-available (was: )
> Introduce MiniBatchIntervalInferRule and watermark assigner operators
> ----------------------------------------------------------------------
>
> Key: FLINK-12665
> URL: https://issues.apache.org/jira/browse/FLINK-12665
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Planner, Table SQL / Runtime
> Reporter: godfrey he
> Assignee: godfrey he
> Priority: Major
> Labels: pull-request-available
>
> This issue aims to introduce MiniBatchIntervalInferRule to infer the
> mini-batch interval of watermark assigner, This rule could handle the
> following two kinds of operator:
> 1. supports operators which supports mini-batch and does not require
> watermark, e.g. group aggregate. In this case,
> {{StreamExecWatermarkAssigner}} with Protime mode will be created if not
> exist, and the interval value will be set as
> {{SQL_EXEC_MINIBATCH_ALLOW_LATENCY}}.
> 2. supports operators which requires watermark, e.g. window join, window
> aggregate. In this case, {{StreamExecWatermarkAssigner}} already exists, and
> its MiniBatchIntervalTrait will be updated as the merged intervals from its
> outputs.
> Currently, mini-batched window aggregate is not supported, and will be
> introduced later.
> this issue also introduces watermark assigner operators, including:
> 1. {{WatermarkAssignerOperator}}, that extracts timestamps from stream
> elements and generates periodic watermarks.
> 2. {{MiniBatchedWatermarkAssignerOperator}}, that extracts timestamps from
> stream elements and generates watermarks with specified emit latency.
> 3. {{MiniBatchAssignerOperator}}, that emits mini-batch marker in a given
> period.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
