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From Fabian Hueske <fhue...@gmail.com>
Subject Re: Som question about Flink stream sql
Date Thu, 05 Jan 2017 09:42:42 GMT
Hi Yuhong,

as you noticed, FLIP-11 is about the window operations on the Table API and
does not include SQL.
The reason is that the Table API is completely Flink domain, i.e., we can
design and implement the API. For SQL we have a dependency on Calcite.

You are right, that Calcite's JIRA issue for group windows [1] seems to be
stale. I don't have more information on that. You could ping there and ask
what the status is.
Row windows are already supported by Calcite (SQL's OVER and WINDOW
clauses), so these could be implemented for SQL as well.
Maybe it's even easier to start from the SQL side and add the Table API
later to ensure a compatible compilation process.

Best, Fabian



2017-01-05 4:40 GMT+01:00 Hongyuhong <hongyuhong@huawei.com>:

> Hi,
>
> We are currently exploring on Flink streamsql ,
>
> And I see the group-window has been implemented in Table API, and
> row-window is also planning in FLIP-11. It seems that row-window grammar is
> more similar to calcite over clause.
>
> I’m curious about the detail plan and roadmap of stream sql, cause FLIP-11
> just mentioned Table API.
>
> And is that streamsql priority implement row-window? Or if group-window is
> considered, what is the status on calcite integration?
>
> The issue on calcite jira was raised in August, what’s the status right
> now?
>
> Thanks in advance!
>
>
>
> Regards
>
> Yuhong
>
>
>
>
>
>
>

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