[jira] [Created] (SPARK-2342) Evaluation helper's output type doesn't conform to input type

["Yijie Shen (JIRA)" <ji...@apache.org>]

Yijie Shen created SPARK-2342:
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             Summary: Evaluation helper's output type doesn't conform to input type
                 Key: SPARK-2342
                 URL: https://issues.apache.org/jira/browse/SPARK-2342
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 1.0.0
            Reporter: Yijie Shen
            Priority: Minor


In sql/catalyst/org/apache/spark/sql/catalyst/expressions.scala
protected final def n2 ( i: Row, e1: Expression, e2: Expression, f: ((Numeric[Any], Any, Any) => Any)): Any  
is intended  to do computations for Numeric add/Minus/Multipy.
Just as the comment suggest : "Those expressions are supposed to be in the same data type, and also the return type."
But in code, function f was casted to function signature:
(Numeric[n.JvmType], n.JvmType, n.JvmType) => Int
I thought it as a typo and the correct should be:
(Numeric[n.JvmType], n.JvmType, n.JvmType) => n.JvmType



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