Github user kiszk commented on a diff in the pull request: https://github.com/apache/spark/pull/21258#discussion_r192548103 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala --- @@ -235,6 +235,86 @@ case class CreateMap(children: Seq[Expression]) extends Expression { override def prettyName: String = "map" } +/** + * Returns a catalyst Map containing the two arrays in children expressions as keys and values. + */ +@ExpressionDescription( + usage = """ + _FUNC_(keys, values) - Creates a map with a pair of the given key/value arrays. All elements + in keys should not be null""", + examples = """ + Examples: + > SELECT _FUNC_([1.0, 3.0], ['2', '4']); + {1.0:"2",3.0:"4"} + """, since = "2.4.0") +case class CreateMapFromArrays(left: Expression, right: Expression) --- End diff -- In existing convention, `"map" -> "CreateMap"`. How about `"map_from_arrays" -> ???`? I am neutral on `MapFromArrays` or `CreateMapFromArrays`. WDYT?
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