Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6405#discussion_r31195926
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
---
@@ -97,88 +112,84 @@ abstract class BinaryArithmetic extends
BinaryExpression {
}
}
- def evalInternal(evalE1: Any, evalE2: Any): Any =
- sys.error(s"BinaryExpressions must either override eval or
evalInternal")
+ protected def evalInternal(evalE1: Any, evalE2: Any): Any =
+ sys.error(s"BinaryArithmetics must either override eval or
evalInternal")
}
case class Add(left: Expression, right: Expression) extends
BinaryArithmetic {
override def symbol: String = "+"
- lazy val numeric = dataType match {
- case n: NumericType => n.numeric.asInstanceOf[Numeric[Any]]
- case other => sys.error(s"Type $other does not support numeric
operations")
- }
-
- override def eval(input: Row): Any = {
- val evalE1 = left.eval(input)
- if(evalE1 == null) {
- null
- } else {
- val evalE2 = right.eval(input)
- if (evalE2 == null) {
- null
+ protected def errorMessageInternal(t: DataType) = {
+ TypeUtils.checkForNumericExpr(t, "todo").orElse {
--- End diff --
why orElse here?
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