Github user adrian-wang commented on a diff in the pull request:
https://github.com/apache/spark/pull/7589#discussion_r35187201
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeFunctions.scala
---
@@ -62,6 +62,53 @@ case class CurrentTimestamp() extends LeafExpression
with CodegenFallback {
}
}
+/**
+ * Adds a number of days to startdate.
+ */
+case class DateAdd(startDate: Expression, days: Expression)
+ extends BinaryExpression with ImplicitCastInputTypes {
+
+ override def left: Expression = startDate
+ override def right: Expression = days
+
+ override def inputTypes: Seq[AbstractDataType] = Seq(DateType,
IntegerType)
--- End diff --
Yes, but then we have to decide it is date or timestamp, and that need to
be done at run time.
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