[jira] [Created] (PIG-3239) Unable to return multiple values from a macro using SPLIT

["Luis Belloch (JIRA)" <ji...@apache.org>]

Luis Belloch created PIG-3239:
---------------------------------

             Summary: Unable to return multiple values from a macro using SPLIT
                 Key: PIG-3239
                 URL: https://issues.apache.org/jira/browse/PIG-3239
             Project: Pig
          Issue Type: Bug
    Affects Versions: 0.10.0
         Environment: Apache Pig version 0.10.0-cdh4.2.0 (rexported) 
compiled Feb 15 2013, 12:19:17

Linux 3.2.0-38-generic #61-Ubuntu SMP Tue Feb 19 12:18:21 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
            Reporter: Luis Belloch
            Priority: Minor


Hi, I'm unable to return multiple values from a macro when values come from a SPLIT. Here is an small example:

{code}
DEFINE my_macro(seq) RETURNS valid, invalid {
    added = FOREACH $seq GENERATE $0 * 2, $1;
    SPLIT added INTO $valid IF $1 == true, $invalid OTHERWISE;
}

data = LOAD 'case.csv' USING PigStorage(',') AS (value: int, valid: boolean);
P, Q = my_macro(data);
DUMP P;
DUMP Q;
{code}

Pig is unable to recognize the {{OTHERWISE}} side. Error is: {{ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: <at case.pig, line 3> Invalid macro definition: . Reason: Macro 'my_macro' missing return alias: invalid}}

Simple workaround is to force {{$invalid}} to be returned as {{FOREACH}} result:

{code}
SPLIT added INTO $valid IF $1 == true, tmp_invalid OTHERWISE;
$invalid = FOREACH tmp_invalid GENERATE *;
{code}

Samples and logs attached to the issue.



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