Hi Flink users,
I'm new to Flink and trying to evaluate couple of streaming frameworks via implementing same apps.
While implementing apps with both Table API and SQL, I found there's 'no watermark' presented in Flink UI, whereas I had been struggling to apply row time attribute.
For example, below is one of TableSource implementation which wraps DataStream reading from Kafka.
(Actually I ended up implementing TableSource to address adding rowtime attribute as well as reading and parsing JSON. I'd be really happy if someone can guide a way to get rid of needed of custom implementation of TableSource.)
and below is one of app I implemented:
Btw, I'm about to experiment side-output with late events, but is it possible to leverage side-output with Table API / SQL? Looks like DataStream exposes late events only when it's converted to AllWindowedStream.
Thanks in advance!
Jungtaek Lim (HeartSaVioR)