Pig do not support group by boolean type
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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
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