uros-b commented on code in PR #57476:
URL: https://github.com/apache/spark/pull/57476#discussion_r3700459177


##########
sql/api/src/main/scala/org/apache/spark/sql/types/Decimal.scala:
##########
@@ -433,6 +433,8 @@ final class Decimal extends Ordered[Decimal] with 
Serializable {
               if (doubled > pow10diff || doubled == pow10diff && lv % 2 != 0) {
                 lv += (if (droppedDigits < 0) -1L else 1L)
               }
+            case ROUND_DOWN =>
+            // Truncation toward zero: `lv /= pow10diff` already dropped the 
fractional part.

Review Comment:
   ```suggestion
                 // Truncation toward zero: `lv /= pow10diff` already dropped 
the fractional part.
   ```



##########
sql/api/src/main/scala/org/apache/spark/sql/types/Decimal.scala:
##########
@@ -433,6 +433,8 @@ final class Decimal extends Ordered[Decimal] with 
Serializable {
               if (doubled > pow10diff || doubled == pow10diff && lv % 2 != 0) {
                 lv += (if (droppedDigits < 0) -1L else 1L)
               }
+            case ROUND_DOWN =>
+            // Truncation toward zero: `lv /= pow10diff` already dropped the 
fractional part.

Review Comment:
   The comment in Decimal.scala sits at the case indentation rather than inside 
the body; it should be indented one more level to read as the case body.



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