Rong Rong created FLINK-11454:
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Summary: Support MergedStream operation
Key: FLINK-11454
URL: https://issues.apache.org/jira/browse/FLINK-11454
Project: Flink
Issue Type: Sub-task
Components: DataStream API
Reporter: Rong Rong
Following SlicedStream, the mergedStream operator merges results from sliced
stream and produces windowing results.
{code:java}
val slicedStream: SlicedStream = inputStream
.keyBy("key")
.sliceWindow(Time.seconds(5L)) // new “slice window” concept: to
combine
// tumble results based on discrete
// non-overlapping windows.
.aggregate(aggFunc)
val mergedStream1: MergedStream = slicedStream
.slideOver(Time.second(10L)) // combine slice results with same
// windowing function, equivalent to
// WindowOperator with an aggregate
state
// and derived aggregate function.
val mergedStream2: MergedStream = slicedStream
.slideOver(Count.of(5))
.apply(windowFunction) // apply a different window function
over
// the sliced results.{code}
MergedStream are produced by MergeOperator.
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