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https://issues.apache.org/jira/browse/SPARK-2342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Yijie Shen updated SPARK-2342:
------------------------------

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

  was:
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


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



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