Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/21282#discussion_r187258000 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala --- @@ -118,6 +120,229 @@ case class MapValues(child: Expression) override def prettyName: String = "map_values" } +/** + * Returns a map created from the given array of entries. + */ +@ExpressionDescription( + usage = "_FUNC_(arrayOfEntries) - Returns a map created from the given array of entries.", + examples = """ + Examples: + > SELECT _FUNC_(array(struct(1, 'a'), struct(2, 'b'))); + {1:"a",2:"b"} + """, + since = "2.4.0") +case class MapFromEntries(child: Expression) extends UnaryExpression +{ + private lazy val resolvedDataType: Option[MapType] = child.dataType match { --- End diff -- `@transient`?
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