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https://issues.apache.org/jira/browse/FLINK-5654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15946868#comment-15946868
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ASF GitHub Bot commented on FLINK-5654:
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GitHub user rtudoran opened a pull request:
https://github.com/apache/flink/pull/3641
[FLINK-5654] - Add processing time OVER RANGE BETWEEN x PRECEDING
aggregation to SQL
Added tests based on harness util framework
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please take the following check list into consideration.
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- [x ] General
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- [x ] Documentation
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- [x ] Tests & Build
- Functionality added by the pull request is covered by tests
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You can merge this pull request into a Git repository by running:
$ git pull https://github.com/huawei-flink/flink FLINK-5654Re3_2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3641.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3641
----
----
> Add processing time OVER RANGE BETWEEN x PRECEDING aggregation to SQL
> ---------------------------------------------------------------------
>
> Key: FLINK-5654
> URL: https://issues.apache.org/jira/browse/FLINK-5654
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: Fabian Hueske
> Assignee: radu
>
> The goal of this issue is to add support for OVER RANGE aggregations on
> processing time streams to the SQL interface.
> Queries similar to the following should be supported:
> {code}
> SELECT
> a,
> SUM(b) OVER (PARTITION BY c ORDER BY procTime() RANGE BETWEEN INTERVAL '1'
> HOUR PRECEDING AND CURRENT ROW) AS sumB,
> MIN(b) OVER (PARTITION BY c ORDER BY procTime() RANGE BETWEEN INTERVAL '1'
> HOUR PRECEDING AND CURRENT ROW) AS minB
> FROM myStream
> {code}
> The following restrictions should initially apply:
> - All OVER clauses in the same SELECT clause must be exactly the same.
> - The PARTITION BY clause is optional (no partitioning results in single
> threaded execution).
> - The ORDER BY clause may only have procTime() as parameter. procTime() is a
> parameterless scalar function that just indicates processing time mode.
> - UNBOUNDED PRECEDING is not supported (see FLINK-5657)
> - FOLLOWING is not supported.
> The restrictions will be resolved in follow up issues. If we find that some
> of the restrictions are trivial to address, we can add the functionality in
> this issue as well.
> This issue includes:
> - Design of the DataStream operator to compute OVER ROW aggregates
> - Translation from Calcite's RelNode representation (LogicalProject with
> RexOver expression).
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