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From Tyler Akidau <taki...@google.com.INVALID>
Subject Re: Towards a spec for robust streaming SQL, Part 2
Date Tue, 25 Jul 2017 19:12:03 GMT
+dev@apex.apache.org, since I'm told Apex has a Calcite integration as
well. If anyone on the Apex side wants to join in on the fun, your input
would be welcomed!


On Mon, Jul 24, 2017 at 4:34 PM Tyler Akidau <takidau@apache.org> wrote:

> Hello Flink, Calcite, and Beam dev lists!
> Linked below is the second document I promised way back in April regarding
> a collaborative spec for streaming SQL in Beam/Calcite/Flink (& apologies
> for the delay; I thought I was nearly done a while back and then temporal
> joins expanded to something much larger than expected).
> To repeat what it says in the doc, my hope is that it can serve various
> purposes over it's lifetime:
>    -
>    - A discussion ground for ironing out any remaining features necessary
>    for supporting robust streaming semantics in Calcite SQL.
>    - A rough, high-level source of truth for tracking efforts underway in
>    support of this, currently spanning the Calcite, Flink, and Beam projects.
>    - A written specification of the changes that were made, for the sake
>    of understanding the delta after the fact.
> The first and third points are, IMO, the most important. AFAIK, there are
> a few features missing still that need to be defined (e.g., triggers
> equivalents via EMIT, robust temporal join support). I'm also proposing a
> clear distinction of streams and tables, which I think is important, but
> which I believe is not the approach most folks have been taking in this
> area. Sorting out these open issues and then having a concise record of the
> solutions adopted will be important for providing a solid streaming
> experience and teaching folks how to use it.
> At any rate, I would much appreciate it if anyone with an interest in this
> stuff could please take a look and add comments/suggestions/references to
> related work in flight/etc as appropriate. For now please use
> comments/suggestions, but if you really want to dive in with edit access,
> let me know.
> The doc: http://s.apache.org/streaming-sql-spec
> -Tyler

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