cloud-fan commented on a change in pull request #31929:
URL: https://github.com/apache/spark/pull/31929#discussion_r599343560
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/intervalExpressions.scala
##########
@@ -249,3 +249,49 @@ case class MakeInterval(
override def prettyName: String = "make_interval"
}
+
+// Multiply an year-month interval by a numeric
+case class MultiplyYMInterval(
+ interval: Expression,
+ num: Expression)
+ extends BinaryExpression with ImplicitCastInputTypes with NullIntolerant
with Serializable {
+ override def left: Expression = interval
+ override def right: Expression = num
+
+ override def inputTypes: Seq[AbstractDataType] = Seq(YearMonthIntervalType,
NumericType)
+ override def dataType: DataType = YearMonthIntervalType
+
+ @transient
+ private lazy val evalFunc: (Int, Any) => Any = right.dataType match {
+ case ByteType | ShortType | IntegerType => (months: Int, num) =>
+ Math.multiplyExact(months, num.asInstanceOf[Number].intValue())
+ case LongType => (months: Int, num) =>
+ Math.toIntExact(Math.multiplyExact(months, num.asInstanceOf[Long]))
+ case FloatType | DoubleType => (months: Int, num) =>
+ Math.toIntExact(Math.round(months *
num.asInstanceOf[Number].doubleValue()))
+ case _: DecimalType => (months: Int, num) =>
+ val decimalRes = ((new Decimal).set(months) *
num.asInstanceOf[Decimal]).toJavaBigDecimal
+ decimalRes.setScale(0, java.math.RoundingMode.HALF_UP).intValueExact()
+ }
+
+ override def nullSafeEval(interval: Any, num: Any): Any = {
+ evalFunc(interval.asInstanceOf[Int], num)
+ }
+
+ override def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode =
right.dataType match {
+ case ByteType | ShortType | IntegerType =>
+ defineCodeGen(ctx, ev, (m, n) => s"java.lang.Math.multiplyExact($m, $n)")
+ case LongType =>
+ val jlm = classOf[Math].getName
+ defineCodeGen(ctx, ev, (m, n) =>
s"$jlm.toIntExact($jlm.multiplyExact($m, $n))")
+ case FloatType | DoubleType =>
+ val jlm = classOf[Math].getName
+ defineCodeGen(ctx, ev, (m, n) => s"$jlm.toIntExact($jlm.round($m *
(double)$n))")
+ case _: DecimalType =>
+ defineCodeGen(ctx, ev, (m, n) =>
+ s"((new Decimal()).set($m).$$times($n)).toJavaBigDecimal()" +
+ ".setScale(0, java.math.RoundingMode.HALF_UP).intValueExact()")
+ }
+
+ override def prettyName: String = "multiply_ym_interval"
Review comment:
I think it's not a big deal and we don't have to retain the order.
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