Matthias J. Sax created KAFKA-18950:
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Summary: Allow to "shift" window-start anchor for Tumbling/Hopping
windows
Key: KAFKA-18950
URL: https://issues.apache.org/jira/browse/KAFKA-18950
Project: Kafka
Issue Type: Improvement
Components: streams
Reporter: Matthias J. Sax
Tumbling/Hopping windows are well defined window boundaries by alining the
window start time to the UNIX epoch, ie, the very first window always start at
ts=0.
It could be a useful addition, to allow users to control the start-time
"anchor" though, by adding an additional, optional "shift" parameter. This
would for example allow users, to start a "daily window" at noon, instead of
midnight.
As long as we don't have "timezone" support, such a shift parameter should be a
workaround for daily windows which are currently anchored in UTC timezone...
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