Romain Revol created FLINK-9164:
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Summary: times(#,#) quantifier does not seem to work
Key: FLINK-9164
URL: https://issues.apache.org/jira/browse/FLINK-9164
Project: Flink
Issue Type: Bug
Components: CEP
Affects Versions: 1.4.2
Environment: Windows 10 Pro 64-bit
Core i7-6820HQ @ 2.7 GHz
16GB RAM
Flink 1.4.2
Scala client
Scala 2.11.12
Reporter: Romain Revol
Assuming the following piece of code :
{code:java}
val env = StreamExecutionEnvironment.getExecutionEnvironment
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime)
env.setParallelism(1)
val inputs = env.fromElements((1L, 'a'), (20L, 'a'), (22L, 'a'), (30L, 'a'),
(40L, 'a'))
.assignAscendingTimestamps(_._1)
val pattern = Pattern.begin[(Long, Char)]("Start",
AfterMatchSkipStrategy.skipPastLastEvent())
.where(_._2 == 'a').times(1,2)
CEP.pattern(inputs, pattern).select(_("Start")).addSink(println(_))
env.execute("Test"{code}
This results in
{code:java}
Buffer((1,a))
Buffer((20,a))
Buffer((22,a))
Buffer((30,a))
Buffer((40,a)){code}
While I would expect
{code:java}
Buffer((1,a), (20,a))
Buffer((22,a), (30,a))
Buffer((40,a){code}
My purpose is to match events by pair if possible, or alone if not. Note that
adding greedy does nothing mode but this may be due to
https://issues.apache.org/jira/browse/FLINK-8914.
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