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https://issues.apache.org/jira/browse/PIG-693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thejas M Nair updated PIG-693:
------------------------------
Patch Info: [Patch Available]
> 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.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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