[jira] [Created] (FLINK-5864) CEP: fix duplicate output patterns problem.

[Shang Yuanchun (Jira)]

Kostas Kloudas created FLINK-5864:
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             Summary: CEP: fix duplicate output patterns problem.
                 Key: FLINK-5864
                 URL: https://issues.apache.org/jira/browse/FLINK-5864
             Project: Flink
          Issue Type: Bug
          Components: CEP
    Affects Versions: 1.3.0
            Reporter: Kostas Kloudas
             Fix For: 1.3.0


Currently when searching for a pattern {{a,b,c}} and we have input elements {{a -> b1 -> b2 ->c}} where {{b1}} and {{b2}} are both valid elements for the position b, then instead of having an output of 2 matched patterns: {{a, b1, c}} and {{a, b2, c}}, we have 4, with 2 copies of each valid pattern.

The problem is that currently the graph of valid patterns that is created creates two nodes for c, with each one connected to both b1 and b2. This leads to each of the instances of c having 2 valid matched patterns.
     



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