Zoltan Haindrich created HIVE-20689:
---------------------------------------
Summary: Simplifying using predicates should consider not equals
in case its a predicate
Key: HIVE-20689
URL: https://issues.apache.org/jira/browse/HIVE-20689
Project: Hive
Issue Type: Bug
Reporter: Zoltan Haindrich
Assignee: Zoltan Haindrich
Right now simplifyUsingPredicates bails out for [all <>
comparisions|https://github.com/apache/calcite/blob/c39bfaa02a06ac91575076a6e74f29863923f5eb/core/src/main/java/org/apache/calcite/rex/RexSimplify.java#L1050];
however if it's already an explicit predicate (or its negated one); then it
could be demoted to:
{code}
x IS NOT NULL or null
{code}
which could be further simplified in most cases..
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
