Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7398#discussion_r34641535
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
---
@@ -87,6 +88,10 @@ abstract class BinaryArithmetic extends BinaryOperator {
def decimalMethod: String =
sys.error("BinaryArithmetics must override either decimalMethod or
genCode")
+ /** Name of the function for this expression on a [[Interval]] type. */
+ def intervalMethod: String =
--- End diff --
this seems excessive, since it won't work for multiply or division.
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