Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15417#discussion_r85650659
--- 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 --
```
db2 "select a.actno from act a, act b where a.actno = b.actno and rand() <
0.5 and rand() >= 0.5"
```
In the above example, the non-deterministic functions in the join
conditions are also evaluated twice in DBMS.
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