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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-427) casting parameters of a UDF
Date Thu, 11 Sep 2008 19:55:44 GMT
casting parameters of a UDF
---------------------------

                 Key: PIG-427
                 URL: https://issues.apache.org/jira/browse/PIG-427
             Project: Pig
          Issue Type: Improvement
    Affects Versions: types_branch
            Reporter: Olga Natkovich
             Fix For: types_branch


Currently if we have a UDF that declares via getArgToFuncMapping that it can only handle a
subset of types, passing any other types to the function would result in an error. However,
some types can be promoted to others and it would be useful if typechecker to perform best
fit cast. For instance, if the input parameter has type of Long and the UDF support Int and
Double, the code should cast the paraneter into Double.

This would be very useful for conversion of the UDFs from the piigybank to the new code.

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