Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/19307#discussion_r140211712
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameStatSuite.scala ---
@@ -230,19 +230,16 @@ class DataFrameStatSuite extends QueryTest with
SharedSQLContext {
val resNaN1 = dfNaN.stat.approxQuantile("input1", Array(q1, q2),
epsilon)
assert(resNaN1.count(_.isNaN) === 0)
- assert(resNaN1.count(_ == null) === 0)
--- End diff --
resNaN1 is an Array[Double] so can never contain null. This is always true
and generated a warning
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