[PIG-1761] New logical plan: Exception when bag dereference in the middle of expression

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 0.8.0
• Component/s: impl
• Hadoop Flags: Reviewed
• Assignee: Daniel Dai
• Reporter: Daniel Dai
• Created: 09/Dec/10 23:19
• Updated: 17/Dec/10 22:47
• Resolved: 10/Dec/10 20:01

Description

The following script fail:

A = load '1.txt' as (a0:chararray);
B = foreach A generate UPPER(REGEX_EXTRACT_ALL(a0, '.*@(.*)#.*').$0);
explain B;

Error message:
Caused by: java.lang.NullPointerException
at org.apache.pig.newplan.ReverseDependencyOrderWalker.walk(ReverseDependencyOrderWalker.java:70)
at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:50)
at org.apache.pig.newplan.logical.optimizer.SchemaResetter.visit(SchemaResetter.java:104)
at org.apache.pig.newplan.logical.relational.LOGenerate.accept(LOGenerate.java:229)
at org.apache.pig.newplan.DependencyOrderWalker.walk(DependencyOrderWalker.java:75)
at org.apache.pig.newplan.logical.optimizer.SchemaResetter.visit(SchemaResetter.java:93)
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:261)
... 12 more