[ 
https://issues.apache.org/jira/browse/PIG-1097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12780380#action_12780380
 ] 

Jeff Zhang commented on PIG-1097:
---------------------------------

agree, FilterFunc is equivalent to EvalFunc<Boolean> in my opinion.  I do not 
know about the history of FilterFunc, does it come before pig support types? 
But now I think it should be deprecated.

And why pig do not support boolean type in foreach projection and group by ? 
any performance consideration ?



> Pig do not support group by boolean type
> ----------------------------------------
>
>                 Key: PIG-1097
>                 URL: https://issues.apache.org/jira/browse/PIG-1097
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>            Reporter: Jeff Zhang
>            Assignee: Jeff Zhang
>            Priority: Minor
>             Fix For: 0.6.0
>
>
> My Script is as following, the TestUDF return boolean type.
> {color:blue}
> DEFINE testUDF org.apache.pig.piggybank.util.TestUDF();
> raw = LOAD 'data/input';
> raw = FOREACH raw GENERATE testUDF();
> raw = GROUP raw BY $0;
> DUMP raw;
> {color}
> *The above script will throw exception:*
> Exception in thread "main" 
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to 
> open iterator for alias raw
>       at org.apache.pig.PigServer.openIterator(PigServer.java:481)
>       at 
> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:539)
>       at 
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
>       at 
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:168)
>       at org.apache.pig.PigServer.registerScript(PigServer.java:409)
>       at PigExample.main(PigExample.java:13)
> Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1002: 
> Unable to store alias raw
>       at org.apache.pig.PigServer.store(PigServer.java:536)
>       at org.apache.pig.PigServer.openIterator(PigServer.java:464)
>       ... 5 more
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2043: 
> Unexpected error during execution.
>       at 
> org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.execute(HExecutionEngine.java:269)
>       at 
> org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:780)
>       at org.apache.pig.PigServer.store(PigServer.java:528)
>       ... 6 more
> Caused by: 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobCreationException:
>  ERROR 2036: Unhandled key type boolean
>       at 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.selectComparator(JobControlCompiler.java:856)
>       at 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.getJob(JobControlCompiler.java:561)
>       at 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.compile(JobControlCompiler.java:251)
>       at 
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:128)
>       at 
> org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.execute(HExecutionEngine.java:249)
>       ... 8 more

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

Reply via email to