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

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-1464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882583#action_12882583 ] 

Hadoop QA commented on PIG-1464:
--------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12448030/PIG_1463.patch
  against trunk revision 957753.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit warnings.

    +1 core tests.  The patch passed core unit tests.

    -1 contrib tests.  The patch failed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/350/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/350/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/350/console

This message is automatically generated.

> 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
>             Fix For: 0.8.0
>
>         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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