Limit and Illustrate do not work together
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Key: PIG-502
URL: https://issues.apache.org/jira/browse/PIG-502
Project: Pig
Issue Type: Improvement
Components: tools
Affects Versions: types_branch
Environment: Hadoop 18
Reporter: Viraj Bhat
Suppose a user want to do an {code} illustrate{code} command after limiting his
data to a certain number of records, it does not seem to work
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{code}
MYDATA = load 'testfilelarge.txt' as (f1, f2, f3, f4, f5);
MYDATA = limit MYDATA 10;
describe MYDATA;
illustrate MYDATA;
{code}
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Running this script produces the following output and error
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MYDATA: {f1: bytearray,f2: bytearray,f3: bytearray,f4: bytearray,f5: bytearray}
2008-10-18 02:14:26,900 [main] INFO
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to
hadoop fil
e system at: hdfs://localhost:9000
2008-10-18 02:14:27,013 [main] INFO
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to
map-reduce
job tracker at: localhost:9001
java.lang.RuntimeException: Unrecognized logical operator.
at
org.apache.pig.pen.EquivalenceClasses.GetEquivalenceClasses(EquivalenceClasses.java:60)
at
org.apache.pig.pen.DerivedDataVisitor.evaluateOperator(DerivedDataVisitor.java:368)
at
org.apache.pig.pen.DerivedDataVisitor.visit(DerivedDataVisitor.java:273)
at org.apache.pig.impl.logicalLayer.LOLimit.visit(LOLimit.java:71)
at org.apache.pig.impl.logicalLayer.LOLimit.visit(LOLimit.java:10)
at
org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
at
org.apache.pig.pen.LineageTrimmingVisitor.init(LineageTrimmingVisitor.java:98)
at
org.apache.pig.pen.LineageTrimmingVisitor.<init>(LineageTrimmingVisitor.java:90)
at
org.apache.pig.pen.ExampleGenerator.getExamples(ExampleGenerator.java:106)
at org.apache.pig.PigServer.getExamples(PigServer.java:630)
at
org.apache.pig.tools.grunt.GruntParser.processIllustrate(GruntParser.java:279)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:183)
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)
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If I remove the illustrate and replace it with {code} dump MYDATA; {code} it
works..
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{code}
MYDATA = load 'testfilelarge.txt' as (f1, f2, f3, f4, f5);
MYDATA = limit MYDATA 10;
describe MYDATA;
-- illustrate MYDATA;
dump MYDATA;
{code}
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