GitHub user hequn8128 opened a pull request:

    https://github.com/apache/flink/pull/5347

    [FLINK-8492][table] Fix calc cost bug

    
    ## What is the purpose of the change
    
    Fix calc cost bug. Currently, unsupported exception will be thrown when 
multi calc existing between correlate and TableFunctionScan.
    
    
    ## Brief change log
    
      - Add a constant 1 to compCnt in `CommonCalc`
    
    
    ## Verifying this change
    
    This change added tests and can be verified as follows:
    
      - Added integration tests for udtf with multi cals
    
    
    ## Does this pull request potentially affect one of the following parts:
    
      - Dependencies (does it add or upgrade a dependency): (no)
      - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (no)
      - The serializers: (no)
      - The runtime per-record code paths (performance sensitive): (no)
      - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
      - The S3 file system connector: (no)
    
    ## Documentation
    
      - Does this pull request introduce a new feature? (no)


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/hequn8128/flink 8492

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/5347.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #5347
    
----
commit bf1b4d4773c3690dfe73a0e71b22730d8b5eb99c
Author: hequn8128 <chenghequn@...>
Date:   2018-01-24T04:25:13Z

    [FLINK-8492][table] Fix calc cost bug

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