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https://issues.apache.org/jira/browse/PIG-4897?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Koji Noguchi updated PIG-4897:
------------------------------
Hadoop Flags: Incompatible change
Status: Patch Available (was: Open)
Setting "incompatible change" flag.
Please let me know your thought.
If we have any users started using 'run/exec' for setting some params after
PIG-3359, this patch will break it.
For example,
{code:title=test.pig}
run setparams.pig
A = load '${useparamfrompreviousrun}' using PigStorage();
...
{code}
> Scope of param substitution for run/exec commands
> -------------------------------------------------
>
> Key: PIG-4897
> URL: https://issues.apache.org/jira/browse/PIG-4897
> Project: Pig
> Issue Type: Bug
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Attachments: pig-4897-v01-notestyet.patch, pig-4897-v02.patch,
> pig-4897-v03.patch
>
>
> After PIG-3359, pig param substitution became global in that parameter
> declared in the pig script called from {{run}} or {{exec}} would live after
> that script finishes.
> This created an interesting situation.
> {code:title=test1.pig}
> exec -param output=/tmp/deleteme111 test1_1.pig
> exec -param output=/tmp/deleteme222 test1_1.pig
> {code}
> {code:title=test1_1.pig}
> %default myout '$output.out';
> A = load 'input.txt' as (a0:int);
> store A into '$myout';
> {code}
> Running {{test1.pig}} would try to run two jobs that both tries to write to
> /tmp/deleteme111 and fail. (Second param output=/tmp/deleteme222 is ignored.)
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