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https://issues.apache.org/jira/browse/PIG-1086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784992#action_12784992
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Richard Ding commented on PIG-1086:
-----------------------------------
The script works if the input has no schema:
{code}
A = load '1.txt';
B = group A by a0;
C = foreach B { D = order A by *; generate group, D;};
explain C;
{code}
> Nested sort by * throw exception
> --------------------------------
>
> Key: PIG-1086
> URL: https://issues.apache.org/jira/browse/PIG-1086
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.5.0
> Reporter: Daniel Dai
>
> The following script fail:
> A = load '1.txt' as (a0, a1, a2);
> B = group A by a0;
> C = foreach B { D = order A by *; generate group, D;};
> explain C;
> Here is the stack:
> Caused by: java.lang.ArrayIndexOutOfBoundsException: -1
> at java.util.ArrayList.get(ArrayList.java:324)
> at
> org.apache.pig.impl.logicalLayer.schema.Schema.getField(Schema.java:752)
> at
> org.apache.pig.impl.logicalLayer.LOSort.getSortInfo(LOSort.java:332)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogToPhyTranslationVisitor.visit(LogToPhyTranslationVisitor.java:1365)
> at org.apache.pig.impl.logicalLayer.LOSort.visit(LOSort.java:176)
> at org.apache.pig.impl.logicalLayer.LOSort.visit(LOSort.java:43)
> at
> org.apache.pig.impl.plan.DependencyOrderWalkerWOSeenChk.walk(DependencyOrderWalkerWOSeenChk.java:69)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.LogToPhyTranslationVisitor.visit(LogToPhyTranslationVisitor.java:1274)
> at
> org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:130)
> at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:45)
> at
> org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:69)
> at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
> at
> org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.compile(HExecutionEngine.java:234)
> at org.apache.pig.PigServer.compilePp(PigServer.java:864)
> at org.apache.pig.PigServer.explain(PigServer.java:583)
> ... 8 more
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