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Posted to dev@pig.apache.org by "Olga Natkovich (JIRA)" <ji...@apache.org> on 2011/03/04 23:06:45 UTC
[jira] Resolved: (PIG-1523) GROUP BY multiple column not working
with new optimizer
[ https://issues.apache.org/jira/browse/PIG-1523?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Olga Natkovich resolved PIG-1523.
---------------------------------
Resolution: Fixed
Works with Pig 0.8
> GROUP BY multiple column not working with new optimizer
> -------------------------------------------------------
>
> Key: PIG-1523
> URL: https://issues.apache.org/jira/browse/PIG-1523
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Swati Jain
>
> The following script does a GroupBy multiple columns:
> {noformat}
> A = load '<any file>' USING PigStorage(',') as (a1:int,a2:int,a3:int);
> G1 = GROUP A by (a1,a2);
> D = Filter G1 by group.$0 > 1;
> explain D;
> {noformat}
> The above fails with the following error when the new optimizer is enabled (it fails with the old framework too but only when it gets to the execution stage):
> {noformat}
> Caused by: java.lang.NullPointerException
> at org.apache.pig.experimental.logical.LogicalPlanMigrationVistor$LogicalExpPlanMigrationVistor.visit(LogicalPlanMigrationVistor.java:424)
> at org.apache.pig.impl.logicalLayer.LOProject.visit(LOProject.java:404)
> at org.apache.pig.impl.logicalLayer.LOProject.visit(LOProject.java:58)
> at org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:69)
> at org.apache.pig.experimental.logical.LogicalPlanMigrationVistor.translateExpressionPlan(LogicalPlanMigrationVistor.java:155)
> at org.apache.pig.experimental.logical.LogicalPlanMigrationVistor.visit(LogicalPlanMigrationVistor.java:295)
> at org.apache.pig.impl.logicalLayer.LOFilter.visit(LOFilter.java:116)
> at org.apache.pig.impl.logicalLayer.LOFilter.visit(LOFilter.java:41)
> 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:237)
> {noformat}
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