MaxGekk commented on code in PR #41156:
URL: https://github.com/apache/spark/pull/41156#discussion_r1252244221


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala:
##########
@@ -516,7 +530,8 @@ case class Subtract(
 
   override def symbol: String = "-"
 
-  override def decimalMethod: String = "$minus"
+  override def decimalMethod(mathContextValue: GlobalValue, value1: String, 
value2: String):
+  String = s"$value1.$$minus($value2)"

Review Comment:
   ditto: indentation



##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala:
##########
@@ -430,7 +443,8 @@ case class Add(
 
   override def symbol: String = "+"
 
-  override def decimalMethod: String = "$plus"
+  override def decimalMethod(mathContextValue: GlobalValue, value1: String, 
value2: String):
+  String = s"$value1.$$plus($value2)"

Review Comment:
   Please, fix indentation.



##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala:
##########
@@ -279,7 +282,7 @@ abstract class BinaryArithmetic extends BinaryOperator
   }
 
   /** Name of the function for this expression on a [[Decimal]] type. */
-  def decimalMethod: String =
+  def decimalMethod(mathContextValue: GlobalValue, value1: String, value2: 
String): String =

Review Comment:
   Where are the parameters `mathContextValue`, `value1`, `value2` used for?



##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala:
##########
@@ -592,7 +607,10 @@ case class Multiply(
   override def inputType: AbstractDataType = NumericType
 
   override def symbol: String = "*"
-  override def decimalMethod: String = "$times"
+
+  override def decimalMethod(mathContextValue: GlobalValue, value1: String, 
value2: String):
+  String = s"Decimal.apply($value1.toJavaBigDecimal()" +
+    s".multiply($value2.toJavaBigDecimal(), $mathContextValue))"

Review Comment:
   Adjust indentation according to 
https://github.com/databricks/scala-style-guide#indent



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