[jira] [Created] (FLINK-1290) Optimizer prunes all candidates when unable to reuse sort properties

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-1290:
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             Summary: Optimizer prunes all candidates when unable to reuse sort properties
                 Key: FLINK-1290
                 URL: https://issues.apache.org/jira/browse/FLINK-1290
             Project: Flink
          Issue Type: Bug
          Components: Optimizer
    Affects Versions: 0.8-incubating
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 0.8-incubating


Programs fail with an exception that no plan could be created.
The bug can be reproduced by the following code:

{code}
val data : DataSet[(Long, Long)] = ...

data.distinct(0, 1).groupBy(0).reduceGroup(...)
{code}



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