kazuyukitanimura commented on code in PR #407:
URL: https://github.com/apache/datafusion-comet/pull/407#discussion_r1602283078


##########
spark/src/main/scala/org/apache/spark/sql/comet/DecimalPrecision.scala:
##########
@@ -107,11 +108,4 @@ object DecimalPrecision {
       case e => e
     }
   }
-
-  object DecimalExpression {
-    def unapply(e: Expression): Option[(Int, Int)] = e.dataType match {
-      case t: DecimalType => Some((t.precision, t.scale))
-      case _ => None
-    }
-  }

Review Comment:
   Yes, it works. I think this code was copied from Spark 3.5+. This code 
should have been in shims to start with.
   
   When we drop Spark 3.x support in the future, we no longer need this object. 
We can just directly use `org.apache.spark.sql.types.DecimalExpression`
   
   If keeping the current copy of code is preferred, I can put it back though



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