LuciferYang commented on a change in pull request #29434:
URL: https://github.com/apache/spark/pull/29434#discussion_r471898154



##########
File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayBasedMapData.scala
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@@ -136,7 +136,8 @@ object ArrayBasedMapData {
     keys.zip(values).toMap
   }
 
-  def toScalaMap(keys: Seq[Any], values: Seq[Any]): Map[Any, Any] = {
+  def toScalaMap(keys: scala.collection.Seq[Any],

Review comment:
       Yep, I think now it must be `s.c.Seq` unless we accept `case 
ArrayType(et, nullable)` branch  of `RowEncoder.deserializerFor` method has a 
2.13-only branch to use `immutable.ArraySeq.unsafeMake` create a 
`immutable.Seq`. We can't use uniformly` immutable.ArraySeq ` because they are 
in different packages with different Scala version,  I haven't found a perfect 
replacement of `WrappedArray.make` method yet.
   
   Now `WrappedArray.make` create a `mutable.ArraySeq` instance in Scala 2.13 , 
so  the `toScalaMap` method input args are `mutable.ArraySeq` not 
`immutable.ArraySeq` and `Seq` alias representative ` `immutable.Seq` in Scala 
2.13,  not match. On the other hand the `toScalaMap` method is called in 
reflection mode, inconvenient to add 'toSeq'.




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