Github user dianfu commented on the issue:
https://github.com/apache/flink/pull/4296
@dawidwys Thanks a lot for the review. I have updated the patch. Currently,
there is something wrong when the greedy state is followed by an optional
state. This can be covered by test case
GreedyITCase.testGreedyZeroOrMoreBeforeOptional2 (duplicate results will be
got). Solutions from my mind are removing the duplicate results before
returning the results in NFA or disabling this case for the time being. What's
your thought? Do you have any suggestions to this problem?
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