Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7516#discussion_r34960884
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeFunctions.scala
---
@@ -213,10 +213,14 @@ case class WeekOfYear(child: Expression) extends
UnaryExpression with ImplicitCa
override def dataType: DataType = IntegerType
- override protected def nullSafeEval(date: Any): Any = {
+ private[this] final val c = {
--- End diff --
Let's use lazy transient val, so we don't have to ship a Calendar instance
over the network.
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