Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/22384#discussion_r216454913
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/PropagateEmptyRelationSuite.scala
---
@@ -147,7 +147,7 @@ class PropagateEmptyRelationSuite extends PlanTest {
.where(false)
.select('a)
.where('a > 1)
- .where('a != 200)
+ .where('a =!= 200)
--- End diff --
(`!=` isn't actually the Column operator for historical reasons having to
do with precedence)
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