iRakson commented on a change in pull request #27542: [SPARK-30790]The dataType of map() should be map<null,null> URL: https://github.com/apache/spark/pull/27542#discussion_r378051609
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala ########## @@ -167,9 +175,9 @@ case class CreateMap(children: Seq[Expression]) extends Expression { override lazy val dataType: MapType = { MapType( keyType = TypeCoercion.findCommonTypeDifferentOnlyInNullFlags(keys.map(_.dataType)) - .getOrElse(StringType), + .getOrElse(defaultElementType), Review comment: In `ArrayBasedMapBuilder`, we are explicitly asserting that `keyType` can't be `NullType`. So assigning `NullType` here is causing test failures. @cloud-fan ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org