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Ryan Blue commented on PIG-4953: -------------------------------- Thanks for reviewing so quickly! > Predicate push-down will not run filters for single unary expressions > --------------------------------------------------------------------- > > Key: PIG-4953 > URL: https://issues.apache.org/jira/browse/PIG-4953 > Project: Pig > Issue Type: Bug > Components: impl > Affects Versions: 0.15.0 > Reporter: Ryan Blue > Assignee: Ryan Blue > Fix For: 0.17.0 > > Attachments: PIG-4953.1.patch, PIG-4953.2.patch, PIG-4953.3.patch > > > While testing PIG-4940, I noticed that a "is not null" predicate was not > pushed down, but equality predicates were. The problem is that the > {{FilterExtractor#visit}} method ignores anything that isn't a > {{BinaryExpression}}. Pushing down {{UnaryExpression}} filters works if the > expression is linked in by a binary expression, like "b is not null and c == > 'val'". -- This message was sent by Atlassian JIRA (v6.3.4#6332)