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Posted to issues@calcite.apache.org by "Danny Chan (Jira)" <ji...@apache.org> on 2019/08/21 03:19:00 UTC

[jira] [Created] (CALCITE-3271) TVF windowing and EMIT syntax support in Calcite

Danny Chan created CALCITE-3271:
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             Summary: TVF windowing and EMIT syntax support in Calcite
                 Key: CALCITE-3271
                 URL: https://issues.apache.org/jira/browse/CALCITE-3271
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.20.0
            Reporter: Danny Chan
            Assignee: Danny Chan


Copied from the mailing list:
Calcite has not implemented the syntax in that paper. I would support an effort to add it (unsurprising, since I am a co-author of that paper).

EMIT STREAM is equivalent to the current SELECT STREAM syntax.

There is no equivalent in current Calcite of the EMIT AFTER WATERMARK, or EMIT STREAM AFTER DELAY.

HOP, TUMBLE and SESSION are supported in Calcite’s SQL parser, but following the paper would be replaced with a table function call. We could need to add HOP, TUMBLE and SESSION table functions. We would also need to make the system aware of how watermarks flow through these table functions (an area that the paper does not go into).

Julian



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