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https://issues.apache.org/jira/browse/FLINK-5804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15900719#comment-15900719
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ASF GitHub Bot commented on FLINK-5804:
---------------------------------------
GitHub user sunjincheng121 opened a pull request:
https://github.com/apache/flink/pull/3491
[FLINK-5804] [table] Add support for procTime non-partitioned OVER RA…
…NGE BETWEEN UNBOUNDED PRECEDING aggregation to SQL.
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- [×] General
- The pull request references the related JIRA issue ("[FLINK-5804] Add
[non-partitioned] processing time OVER RANGE BETWEEN UNBOUNDED PRECEDING
aggregation to SQL")
- The pull request addresses only one issue
- Each commit in the PR has a meaningful commit message (including the
JIRA id)
- [ ] Documentation
- Documentation has been added for new functionality
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You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sunjincheng121/flink FLINK-5804-PR
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3491.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 #3491
----
commit 73ba8bf78b4b283355c14ce5752296d9c131d478
Author: 金竹 <[email protected]>
Date: 2017-03-08T02:52:43Z
[FLINK-5804] [table] Add support for procTime non-partitioned OVER RANGE
BETWEEN UNBOUNDED PRECEDING aggregation to SQL.
----
> Add [non-partitioned] processing time OVER RANGE BETWEEN UNBOUNDED PRECEDING
> aggregation to SQL
> -----------------------------------------------------------------------------------------------
>
> Key: FLINK-5804
> URL: https://issues.apache.org/jira/browse/FLINK-5804
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> 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 (ORDER BY procTime() RANGE BETWEEN UNBOUNDED PRECEDING AND
> CURRENT ROW) AS sumB,
> MIN(b) OVER (ORDER BY procTime() RANGE BETWEEN UNBOUNDED 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.
> - Since no PARTITION BY clause is specified, the execution will be single
> threaded.
> - The ORDER BY clause may only have procTime() as parameter. procTime() is a
> parameterless scalar function that just indicates processing time mode.
> - bounded PRECEDING is not supported (see FLINK-5654)
> - 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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