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Pig, mail # user - Class Cast Exception


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Viswanathan K S 2012-09-28, 13:03
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Re: Class Cast Exception
Bill Graham 2012-09-28, 15:31
Try generating the substring as a chararray and then casting it to int in
another FOREACH.

On Fri, Sep 28, 2012 at 6:03 AM, Viswanathan K S <[EMAIL PROTECTED]>wrote:

> Hi,
>
>
> I am a newbie in Pig.
>
> Tried extracting a piece of string from a given text using substring and
> made the extracted string as double.
>
> Then performing some mathematical functions on the extracted string throws
> me an exception.
>
> Ex :
>
> Data : abc/123.34/-234.45,xxxx
>           def/122.45/-445.65,xxxx
>           ghi/223.45/-555.55,xxx
>
> Considering ‘ ,’  as the delimiter.
>
> a = load  'data' using PigStorage(‘,’) as (f1,f2);
>
>
>
> B = foreach a generate SUBSTRING(f1,4,10) as d1:double;
>
>
>
> Now if I compute some mathematical operation on d1, getting a
> ClassCastException Error :
>
>
>
> “java.lang.ClassCastException : java.lang.String cannot be cast to
> java.long.Double”
>
>
>
> Kindly help regarding the same.
>
>
> Thanks and Regards,
>
> ksviswa
>

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Lauren Blau 2012-09-29, 02:19