The watermark resolution in Flink is one millisecond [1], so the 1st form essentially doesn't allow out-of-orderness (though the elements with the same timestamp are not considered late in this case).
[1] https://ci.apache.org/projects/flink/flink-docs-stable/dev/event_timestamps_watermarks.html Regards, Roman On Wed, Feb 24, 2021 at 7:54 AM joris.vanagtmaal < joris.vanagtm...@wartsila.com> wrote: > Thanks Roman, > > somehow i must have missed this in the documentation. > > What is the difference (if any) between: > > Ascending timestamps: > WATERMARK FOR rowtime_column AS rowtime_column - INTERVAL '0.001' SECOND. > > Bounded out of orderness timestamps: > WATERMARK FOR rowtime_column AS rowtime_column - INTERVAL 'string' > timeUnit. > > > > > > -- > Sent from: > http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/ >