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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-904) Conversion from double to chararray for udf input arguments does not occur
Date Tue, 21 Sep 2010 20:26:39 GMT

    [ https://issues.apache.org/jira/browse/PIG-904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913227#action_12913227
] 

Alan Gates commented on PIG-904:
--------------------------------

I don't understand what the issue is here.  CONCAT does not take doubles.  The script above
tries to pass it a double, and Pig properly says you can't do that.  Is the issue that an
implicit cast isn't inserted here?  I don't think Pig currently does implicit casts to match
possible UDF signatures.

> Conversion from double to chararray for udf input arguments does not occur
> --------------------------------------------------------------------------
>
>                 Key: PIG-904
>                 URL: https://issues.apache.org/jira/browse/PIG-904
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.4.0
>            Reporter: Pradeep Kamath
>            Assignee: Alan Gates
>             Fix For: 0.9.0
>
>
> Script showing the problem:
> {noformat}
>  "a = load '/user/pig/tests/data/singlefile/studenttab10k' as (name, age, gpa:double);
b = foreach a generate CONCAT(gpa, 'dummy'); dump b;"
> Error shown:
> 2009-08-03 17:04:27,573 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1045: Could
not infer the matching function for org.apache.pig.builtin.CONCAT as multiple or none of them
fit. Please use an explicit cast.
> {noformat}
> The error goes away if gpa is casted to chararray.

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