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https://issues.apache.org/jira/browse/PIG-1097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12828396#action_12828396
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Dmitriy V. Ryaboy commented on PIG-1097:
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Jeff, I see this ticket is assigned to you -- any progress so far? Need a hand?
> 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
>
> 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
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