[jira] Resolved: (PIG-693) Parameter to UDF which is an alias returned in another UDF in nested foreach causes incorrect results

["Santhosh Srinivasan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Santhosh Srinivasan resolved PIG-693.
-------------------------------------

      Resolution: Fixed
    Hadoop Flags: [Reviewed]

Patch has been committed. Thanks for the fix Thejas. Good work on cleaning up the type checker.

> Parameter to UDF which is an alias returned in another UDF in nested foreach causes incorrect results
> -----------------------------------------------------------------------------------------------------
>
>                 Key: PIG-693
>                 URL: https://issues.apache.org/jira/browse/PIG-693
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 1.0.0
>            Reporter: Viraj Bhat
>            Assignee: Thejas M Nair
>         Attachments: 693.2.patch, 693.patch, 693.utest.patch, one.txt, REPLACEALL.java, URLDECODE.java
>
>
> Consider the following Pig Script
> {code}
> register myudf.jar;
> A = load 'one.txt' using PigStorage() as ( one: int ); --use this dummy file to start execution
> B = foreach A {
>         dec = myudf.URLDECODE('hello');
>         str1 = myudf.REPLACEALL(dec, '[\\u0000-\\u0020]', ' '); -- ERROR
>         str2 = myudf.REPLACEALL('hello', '[\\u0000-\\u0020]', ' ');
>         generate
>                 dec,
>                 str1,
>                 str2;
>         };
> describe B;
> dump B;
> {code}
> where one.txt is a file which contains number one (1) for starting execution of the Pig script!!
> {code}
> describe B; 
> {code}
>  returns the following:
> B: {urldecode_9: chararray,replaceall_urldecode_10_11: chararray,replaceall_12: chararray}
> {code}
> dump B;
> {code}
> returns 
> (hello,[\u0000-\u0020],hello)
> The result should be:
> There is a workaround for the same, 
> {code}
> register myudf.jar;
> A = load 'one.txt' using PigStorage() as ( one: int );
> B = foreach A {
>         dec = myudf.URLDECODE('hello');
>         generate
>                 dec as dec,
>                 myudf.REPLACEALL(dec, '[\\u0000-\\u0020]', ' ') as str1,
>                 myudf.REPLACEALL('hello', '[\\u0000-\\u0020]', ' ') as str2;
>         };
> describe B;
> dump B;
> {code}
> where 
> {code}
> dump B;
> {code}
> returns (hello,hello,hello)

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