ulysses-you commented on code in PR #36698:
URL: https://github.com/apache/spark/pull/36698#discussion_r893019308


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala:
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@@ -734,11 +920,35 @@ case class Pmod(
 
   override def nullable: Boolean = true
 
+  override def decimalMethod: String = "remainder"
+
+  // This follows Remainder rule
+  override def resultDecimalType(p1: Int, s1: Int, p2: Int, s2: Int): 
DecimalType = {
+    val resultScale = max(s1, s2)
+    val resultPrecision = min(p1 - s1, p2 - s2) + resultScale
+    if (allowPrecisionLoss) {
+      DecimalType.adjustPrecisionScale(resultPrecision, resultScale)
+    } else {
+      DecimalType.bounded(resultPrecision, resultScale)
+    }
+  }
+
   private lazy val isZero: Any => Boolean = right.dataType match {
     case _: DecimalType => x => x.asInstanceOf[Decimal].isZero
     case _ => x => x == 0
   }
 
+  private lazy val pmodCache: (Any, Any) => Any = (l, r) => dataType match {

Review Comment:
   good catch..



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