Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15417#discussion_r85650553
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
---
@@ -1016,6 +1016,8 @@ class FilterPushdownSuite extends PlanTest {
val correctAnswer = x.where("x.a".attr === 5).join(y.where("y.a".attr
=== 5),
condition = Some("x.a".attr === Rand(10) && "y.b".attr === 5))
- comparePlans(Optimize.execute(originalQuery.analyze),
correctAnswer.analyze)
--- End diff --
```SQL
select actno from act where rand() < 0.5 and rand() >= 0.5
```
Based on your conclusion, this should never return any value, right?
However, I checked the other DBMS and the filter conditions are not always
false.
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