[PIG-3657] New partition filter extractor fails with NPE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.1, 0.13.0
• Component/s: impl
• Assignee: Cheolsoo Park
• Reporter: Cheolsoo Park
• Created: 08/Jan/14 17:18
• Updated: 15/Apr/14 20:44
• Resolved: 09/Jan/14 18:30

Description

To reproduce the issue, try a filter expression as follows-

b = FILTER a BY partition_column < x OR (partition_column == y AND non-partition_column == z); 

Pig fails with NPE, and the stack trace is something like this-

Caused by: java.lang.NullPointerException
    at org.apache.pig.newplan.FilterExtractor.checkPushDown(FilterExtractor.java:252)
    at org.apache.pig.newplan.FilterExtractor.visit(FilterExtractor.java:115)
    at org.apache.pig.newplan.logical.rules.PartitionFilterOptimizer$PartitionFilterPushDownTransformer.transform(PartitionFilterOptimizer.java:150)
    at org.apache.pig.newplan.optimizer.PlanOptimizer.optimize(PlanOptimizer.java:110)
    ... 18 more