Github user sunjincheng121 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4157#discussion_r125423153
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/queryConfig.scala
---
@@ -37,6 +37,13 @@ class BatchQueryConfig private[table] extends QueryConfig
class StreamQueryConfig private[table] extends QueryConfig {
/**
+ * The non-windowed groupby aggregate update the calculation result
according a configuration of
+ * time interval. By default non-windowed groupby aggregate will update
calculation result each
+ * row.
+ */
+ private var unboundedAggregateUpdateInterval: Time = Time.milliseconds(0)
--- End diff --
I think `updateRate` meant update result in a fixed frequency, so we should
register a process-time timer. i.e., System clock driven the trigger. And
`updateInterval` meant update result according coming data. so I we should
register a event-time timer. i.e, Data driven the trigger.
I think it again, I suggest using `updateInterval`, i.e., we emit result
according event-time of data.
What do you think?
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