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https://issues.apache.org/jira/browse/PIG-2122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13259783#comment-13259783
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Gianmarco De Francisci Morales commented on PIG-2122:
-----------------------------------------------------
On the backward compatibility issue, I must say that I think modifying Grunt
and interactive mode is not as bad as modifying the batch mode.
I don't feel changing Grunt should be a big issue as most of the production job
that I know are batch scripts which would be unaffected.
> Parameter Substitution doesn't work in the Grunt shell
> ------------------------------------------------------
>
> Key: PIG-2122
> URL: https://issues.apache.org/jira/browse/PIG-2122
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.0, 0.8.1
> Reporter: Grant Ingersoll
> Priority: Minor
>
> Simple param substitution and things like %declare (as copied out of the
> docs) don't work in the grunt shell.
> #Start Pig with: Start Pig with: bin/pig -x local -p time=FOO
> {quote}
> foo = LOAD '/user/grant/foo.txt' AS (a:chararray, b:chararray, c:chararray);
> Y = foreach foo generate *, '$time';
> dump Y;
> {quote}
> Output:
> {quote}
> 2011-06-13 20:22:24,197 [main] INFO
> org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil - Total input
> paths to process : 1
> (1 2 3,,,$time)
> (4 5 6,,,$time)
> {quote}
> Same script, stored in junk.pig, run as: bin/pig -x local -p time=FOO junk.pig
> {quote}
> 2011-06-13 20:23:38,864 [main] INFO
> org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil - Total input
> paths to process : 1
> (1 2 3,,,FOO)
> (4 5 6,,,FOO)
> {quote}
> Also, things like don't work (nor does %declare):
> {quote}
> grunt> %default DATE '20090101';
> 2011-06-13 20:18:19,943 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 1000: Error during parsing. Encountered " <PATH> "%default "" at line 1,
> column 1.
> Was expecting one of:
> <EOF>
> "cat" ...
> "fs" ...
> "sh" ...
> "cd" ...
> "cp" ...
> "copyFromLocal" ...
> "copyToLocal" ...
> "dump" ...
> "describe" ...
> "aliases" ...
> "explain" ...
> "help" ...
> "kill" ...
> "ls" ...
> "mv" ...
> "mkdir" ...
> "pwd" ...
> "quit" ...
> "register" ...
> "rm" ...
> "rmf" ...
> "set" ...
> "illustrate" ...
> "run" ...
> "exec" ...
> "scriptDone" ...
> "" ...
> <EOL> ...
> ";" ...
>
> Details at logfile:
> /Users/grant.ingersoll/projects/apache/pig/release-0.8.1/pig_1308002917912.log
> {quote}
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