[jira] [Created] (HIVE-5408) Method matching needs to be improved in NumericOpMethodResolver to suport decimal type with parameters

["Xuefu Zhang (JIRA)" <ji...@apache.org>]

Xuefu Zhang created HIVE-5408:
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             Summary: Method matching needs to be improved in NumericOpMethodResolver to suport decimal type with parameters
                 Key: HIVE-5408
                 URL: https://issues.apache.org/jira/browse/HIVE-5408
             Project: Hive
          Issue Type: Improvement
          Components: Types
    Affects Versions: 0.12.0
            Reporter: Xuefu Zhang
            Assignee: Xuefu Zhang
             Fix For: 0.13.0


For non-generic UDFs, java reflection is used to determine which evaluate() is to be used for given input expressions. For this, method's argument type is matched against the expression's type. Currently a match exists only if the two types are exactly the same. However, for decimal with precision/and scale, we need to improve the matching, such that a method with decimal arugment should be picked for an input with, say, decimal(5,2). 



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