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https://issues.apache.org/jira/browse/FLINK-12170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-12170:
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Labels: pull-request-available (was: )
> Add support for generating optimized logical plan for Over aggregate
> --------------------------------------------------------------------
>
> Key: FLINK-12170
> URL: https://issues.apache.org/jira/browse/FLINK-12170
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Planner
> Reporter: godfrey he
> Assignee: godfrey he
> Priority: Major
> Labels: pull-request-available
>
> This issue aims to generate optimized plan for Over aggregate queries on both
> Batch and Stream, e.g.
> {code:sql}
> SELECT a, b, c, RANK() OVER (PARTITION BY b ORDER BY c) FROM MyTable
> {code}
> currently, Stream requires all over aggregate functions must be computed on
> the same window, e.g.
> {code:sql}
> SELECT c,
> COUNT(a) OVER (PARTITION BY c ORDER BY proctime RANGE UNBOUNDED
> PRECEDING),
> SUM(a) OVER (PARTITION BY b ORDER BY proctime RANGE UNBOUNDED PRECEDING)
> from MyTable
> {code}
> the above sql is not supported because the partition keys are different.
> Batch does not have such limitation.
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