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From "David Ciemiewicz (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-564) Parameter Substitution using -param option does not seem to work when parameters contain special characters such as +,=,-,?,' "
Date Mon, 06 Apr 2009 21:46:13 GMT

    [ https://issues.apache.org/jira/browse/PIG-564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12696266#action_12696266
] 

David Ciemiewicz commented on PIG-564:
--------------------------------------

Period (.) is also a special character that seems to cause problems.

See related JIRA PIG-754

> Parameter Substitution using -param option does not seem to work when parameters contain
special characters such as +,=,-,?,' "
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: PIG-564
>                 URL: https://issues.apache.org/jira/browse/PIG-564
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.2.0
>            Reporter: Viraj Bhat
>
> Consider the following Pig script which uses parameter substitution
> {code}
> %default qual '/user/viraj'
> %default mydir 'mydir_myextraqual'
> VISIT_LOGS = load '$qual/$mydir' as (a,b,c);
> dump VISIT_LOGS;
> {code}
> If you run the script as:
> ==================================================================================================================
> java -cp pig.jar:${HADOOP_HOME}/conf/ -Dhod.server='' org.apache.pig.Main -param mydir=mydir-myextraqual
mypigparamsub.pig
> ==================================================================================================================
> You get the following error:
> ==================================================================================================================
> 2008-12-15 19:49:43,964 [main] ERROR org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- java.io.IOException: /user/viraj/mydir does not exist
>         at org.apache.pig.backend.executionengine.PigSlicer.validate(PigSlicer.java:109)
>         at org.apache.pig.impl.io.ValidatingInputFileSpec.validate(ValidatingInputFileSpec.java:59)
>         at org.apache.pig.impl.io.ValidatingInputFileSpec.<init>(ValidatingInputFileSpec.java:44)
>         at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:200)
>         at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:742)
>         at org.apache.hadoop.mapred.jobcontrol.Job.submit(Job.java:370)
>         at org.apache.hadoop.mapred.jobcontrol.JobControl.startReadyJobs(JobControl.java:247)
>         at org.apache.hadoop.mapred.jobcontrol.JobControl.run(JobControl.java:279)
>         at java.lang.Thread.run(Thread.java:619)
> java.io.IOException: Unable to open iterator for alias: VISIT_LOGS [Job terminated with
anomalous status FAILED]
>         at org.apache.pig.PigServer.openIterator(PigServer.java:389)
>         at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:269)
>         at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:178)
>         at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
>         at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
>         at org.apache.pig.Main.main(Main.java:306)
> Caused by: java.io.IOException: Job terminated with anomalous status FAILED
>         ... 6 more
> ==================================================================================================================
> Also tried using:  -param mydir='mydir\-myextraqual'
> This behavior occurs if the parameter value contains characters such as +,=, ?. 
> A workaround for this behavior is using a param_file which contains <param_name>=<param_value>
on each line, with the <param_value> enclosed by quotes. For example:
> mydir='mydir-myextraqual' and then running the pig script as:
> java -cp pig.jar:${HADOOP_HOME}/conf/ -Dhod.server='' org.apache.pig.Main -param_file
myparamfile mypigparamsub.pig
> The following issues need to be fixed:
> 1) In -param option if parameter value contains special characters, it is truncated
> 2) In param_file, if  param_value contains a special characters, it should be enclosed
in quotes
> 3) If 2 is a known issue then it should be documented in http://wiki.apache.org/pig/ParameterSubstitution

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