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https://issues.apache.org/jira/browse/PIG-1683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12922219#action_12922219
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Daniel Dai commented on PIG-1683:
---------------------------------
test-patch result:
[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec]
[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
> New logical plan: Nested foreach plan fail if one inner alias is refered more
> than once
> ---------------------------------------------------------------------------------------
>
> Key: PIG-1683
> URL: https://issues.apache.org/jira/browse/PIG-1683
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.8.0
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Fix For: 0.8.0
>
> Attachments: PIG-1683-1.patch
>
>
> The following script fail:
> {code}
> a = load '1.txt' as (a0, a1, a2);
> b = load '2.txt' as (b0, b1);
> c = join a by a0, b by b0;
> d = foreach c {
> d0 = a::a0;
> d1 = a::a1;
> generate ((d0 is not null)? d0 : d1);
> }
> explain d;
> {code}
> Stack:
> ERROR 2015: Invalid physical operators in the physical plan
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1067: Unable to
> explain alias d
> at org.apache.pig.PigServer.explain(PigServer.java:957)
> at
> org.apache.pig.tools.grunt.GruntParser.explainCurrentBatch(GruntParser.java:353)
> at
> org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:285)
> at
> org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:248)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.Explain(PigScriptParser.java:605)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:327)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:165)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:141)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:90)
> at org.apache.pig.Main.run(Main.java:498)
> at org.apache.pig.Main.main(Main.java:107)
> Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 2042:
> Error in new logical plan. Try -Dpig.usenewlogicalplan=false.
> at
> org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.compile(HExecutionEngine.java:308)
> at org.apache.pig.PigServer.compilePp(PigServer.java:1350)
> at org.apache.pig.PigServer.explain(PigServer.java:926)
> ... 10 more
> Caused by:
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogicalToPhysicalTranslatorException:
> ERROR 2015: Invalid physical operators in the physical plan
> at
> org.apache.pig.newplan.logical.expression.ExpToPhyTranslationVisitor.visit(ExpToPhyTranslationVisitor.java:474)
> at
> org.apache.pig.newplan.logical.expression.BinCondExpression.accept(BinCondExpression.java:82)
> at
> org.apache.pig.newplan.ReverseDependencyOrderWalker.walk(ReverseDependencyOrderWalker.java:70)
> at
> org.apache.pig.newplan.logical.relational.LogToPhyTranslationVisitor.visit(LogToPhyTranslationVisitor.java:519)
> at
> org.apache.pig.newplan.logical.relational.LOForEach.accept(LOForEach.java:71)
> at
> org.apache.pig.newplan.DependencyOrderWalker.walk(DependencyOrderWalker.java:75)
> at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:50)
> at
> org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.compile(HExecutionEngine.java:295)
> ... 12 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.POProject
> multiple outputs. This operator does not support multiple outputs.
> at
> org.apache.pig.impl.plan.OperatorPlan.connect(OperatorPlan.java:180)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhysicalPlan.connect(PhysicalPlan.java:133)
> at
> org.apache.pig.newplan.logical.expression.ExpToPhyTranslationVisitor.visit(ExpToPhyTranslationVisitor.java:470)
> ... 19 more
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