Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/8200#discussion_r37154582
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -501,6 +501,10 @@ object BooleanSimplification extends Rule[LogicalPlan]
with PredicateHelper {
case LessThanOrEqual(l, r) => GreaterThan(l, r)
// not(not(e)) => e
case Not(e) => e
+ // De Morgan's law: !(a || b) => !a && !b
--- End diff --
To the `BooleanSimplification`, this probably not an optimization, isn't
it? Probably we'd better to move this logic into `predicates.scala`, which used
only for the cases for the join predicate push down.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
