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https://issues.apache.org/jira/browse/PIG-2902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447055#comment-13447055
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Dmitriy V. Ryaboy commented on PIG-2902:
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You are probably right, but would changing this break existing scripts / 
assumptions?
                
> Pig defaults numeric types to integer instead of double
> -------------------------------------------------------
>
>                 Key: PIG-2902
>                 URL: https://issues.apache.org/jira/browse/PIG-2902
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Jie Li
>
> This was observed in PIG-2835, where Pig defaults the type used in SUM() as 
> integer while it's actually double, thus parsing each number to integer would 
> throw an exception. PIG-2835 replaced the expensive exception handling with a 
> light weight sanity check, but do we really want to default the numeric types 
> to integer?

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