[jira] Updated: (PIG-1464) Should clean the Graph when register another Pig Script

["Olga Natkovich (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-1464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Olga Natkovich updated PIG-1464:
--------------------------------

    Fix Version/s:     (was: 0.8.0)

Unlinking from the release. We want to keep the release backward compatible to reduce impact on the users

> Should clean the Graph when register another Pig Script
> -------------------------------------------------------
>
>                 Key: PIG-1464
>                 URL: https://issues.apache.org/jira/browse/PIG-1464
>             Project: Pig
>          Issue Type: Bug
>          Components: grunt
>    Affects Versions: 0.8.0
>            Reporter: Jeff Zhang
>            Assignee: Jeff Zhang
>         Attachments: PIG_1463.patch
>
>
> In the current implementation, the variable names in pig script are all global variable. This make one pig script know the variable in other scripts. In my opinion, this is not right. Every relation name in pig script should be local variable, otherwise it will bring in unexpected result.  This issue relates to PIG-1423
> E.g there are two pig script as follows:
> Test_1.pig
> {code}
> a = load 'data/b.txt' ;
> {code}
> Test_2.pig
> {code}
> b = foreach a generate $0;   // "a" is recognized by Grunt although it is in Test_1.pig
> {code}
> And the following execute normally, do not throw any exception
> {code}
> PigServer pig=new PigServer(ExecType.Local);
> pig.registerScript("Test_1.pig");
> pig.registerScript("Test_2.pig");
> {code}

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