[
https://issues.apache.org/jira/browse/PIG-4953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15385296#comment-15385296
]
Daniel Dai commented on PIG-4953:
---------------------------------
Seems you miss something in the test, I only see you change getTestExpression
from private to public. Is that right?
> 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
> Attachments: PIG-4953.1.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)
