Grokbase Groups Pig dev February 2011
FAQ
[ https://issues.apache.org/jira/browse/PIG-747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Olga Natkovich updated PIG-747:
-------------------------------

Fix Version/s: (was: 0.9.0)
Logical to Physical Plan Translation fails when temporary alias are created within foreach
------------------------------------------------------------------------------------------

Key: PIG-747
URL: https://issues.apache.org/jira/browse/PIG-747
Project: Pig
Issue Type: Bug
Affects Versions: 0.4.0
Reporter: Viraj Bhat
Assignee: Alan Gates
Attachments: PIG-747-1.patch, physicalplan.txt, physicalplanprob.pig


Consider a the pig script which calculates a new column F inside the foreach as:
{code}
A = load 'physicalplan.txt' as (col1,col2,col3);
B = foreach A {
D = col1/col2;
E = col3/col2;
F = E - (D*D);
generate
F as newcol;
};
dump B;
{code}
This gives the following error:
=======================================================================================================================================
Caused by: org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogicalToPhysicalTranslatorException: ERROR 2015: Invalid physical operators in the physical plan
at org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogToPhyTranslationVisitor.visit(LogToPhyTranslationVisitor.java:377)
at org.apache.pig.impl.logicalLayer.LOMultiply.visit(LOMultiply.java:63)
at org.apache.pig.impl.logicalLayer.LOMultiply.visit(LOMultiply.java:29)
at org.apache.pig.impl.plan.DependencyOrderWalkerWOSeenChk.walk(DependencyOrderWalkerWOSeenChk.java:68)
at org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogToPhyTranslationVisitor.visit(LogToPhyTranslationVisitor.java:908)
at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:122)
at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:41)
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.backend.hadoop.executionengine.HExecutionEngine.compile(HExecutionEngine.java:246)
... 10 more
Caused by: org.apache.pig.impl.plan.PlanException: ERROR 0: Attempt to give operator of type org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.Divide multiple outputs. This operator does not support multiple outputs.
at org.apache.pig.impl.plan.OperatorPlan.connect(OperatorPlan.java:158)
at org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhysicalPlan.connect(PhysicalPlan.java:89)
at org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogToPhyTranslationVisitor.visit(LogToPhyTranslationVisitor.java:373)
... 19 more
=======================================================================================================================================
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postedFeb 15, '11 at 11:33p
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