Hello, I'm checking if this is intentional or a bug in Apache Flink SQL (Flink 1.6.0).
I am using processing time with a RocksDB backend. I have not checked if this issue is also occurring in the Table API. I have not checked if this issue also exists for event time (although I suspect it does). Consider the following two queries: "SELECT foo, COUNT(bar) FROM MyTable WHERE faz = 'xyz' GROUP BY HOP(myTime, INTERVAL '1' SECOND, INTERVAL '5' SECOND), foo" and "SELECT foo, COUNT(bar) FROM MyTable WHERE faz = 'xyz' GROUP BY TUMBLE(myTime, INTERVAL '5' SECOND), foo" I have found in my testing for both of the above that events received in the first 5 seconds are ignored. In other words, the first window interval is effectively a black hole, and only events which are received starting after the first 5 seconds of the stream being "up" are processed. Is this ignoring of events during the first interval a bug or intentional? Many thanks, John
