sunjincheng commented on CALCITE-483:

 What is the specific difference between 
“org.apache.calcite.rel.logical.LogicalCorrelate” and 
“org.apache.calcite.rel.logical.LogicalJoin”,  can you give me an example?

【It behaves like a kind of Join, but works by setting variables in its 
environment and restarting its right-hand input.】

> Implement correlate expression for enumerable convention
> --------------------------------------------------------
>                 Key: CALCITE-483
>                 URL: https://issues.apache.org/jira/browse/CALCITE-483
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Vladimir Sitnikov
>            Assignee: Vladimir Sitnikov
>             Fix For: 1.0.0-incubating
> Implement LogicalCorrelate and the implementation for enumerable

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