Github user zhichao-li commented on a diff in the pull request:
https://github.com/apache/spark/pull/6783#discussion_r34335644
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
---
@@ -387,3 +387,67 @@ case class MinOf(left: Expression, right: Expression)
extends BinaryArithmetic {
override def symbol: String = "min"
override def prettyName: String = symbol
}
+
+case class Pmod(left: Expression, right: Expression) extends
BinaryArithmetic {
+
+ override def symbol: String = "pmod"
+
+ protected def checkTypesInternal(t: DataType) =
+ TypeUtils.checkForNumericExpr(t, "pmod")
+
+ override lazy val resolved =
+ childrenResolved && checkInputDataTypes().isSuccess &&
!DecimalType.isFixed(dataType)
+
+ protected override def nullSafeEval(left: Any, right: Any) =
+ dataType match {
+ case IntegerType => pmod(left.asInstanceOf[Integer],
right.asInstanceOf[Integer])
+ case LongType => pmod(left.asInstanceOf[Long],
right.asInstanceOf[Long])
+ case ShortType => pmod(left.asInstanceOf[Short],
right.asInstanceOf[Short])
+ case ByteType => pmod(left.asInstanceOf[Byte],
right.asInstanceOf[Byte])
+ case FloatType => pmod(left.asInstanceOf[Float],
right.asInstanceOf[Float])
+ case DoubleType => pmod(left.asInstanceOf[Double],
right.asInstanceOf[Double])
+ case _: DecimalType => pmod(left.asInstanceOf[Decimal],
right.asInstanceOf[Decimal])
+ }
+
+ val decimalAddMethod = "$plus"
--- End diff --
I guess it would be more readable if we give it a name ? and it would
confuse the compiler if we write like this`$$plus` or ${$plus(..)} in
`s"""($eval1.remainder($eval2).$decimalAddMethod($eval2)).remainder($eval2)"""`
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