Rui Wang created CALCITE-4146:
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Summary: Implement EMIT AFTER WATERMARK
Key: CALCITE-4146
URL: https://issues.apache.org/jira/browse/CALCITE-4146
Project: Calcite
Issue Type: Sub-task
Reporter: Rui Wang
Assignee: Rui Wang
The goal is to support the following syntax
{code:sql}
SELECT clause
FROM TUMBLE/HOP/SESSION
EMIT AFTER WATERMARK
{code}
note that "EMIT AFTER WATERMARK" is the new thing.
"EMIT AFTER WATERMARK" is proposed in [1]. This idea proposes a way to allow
streaming SQL queries control materialization latency. More specifically, it
means emit elements in a window once the watermark passes the end of that
window.
There are more context discussed in [2][3].
[1]: https://arxiv.org/pdf/1905.12133.pdf
[2]:
https://issues.apache.org/jira/browse/CALCITE-3272?focusedCommentId=17166580&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17166580
[3]:https://lists.apache.org/thread.html/r5bd9a6f7af2c0cd81aecd4de512fd889fbf15f112cc3704f188b1d4f%40%3Cdev.calcite.apache.org%3E
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