Github user mengxr commented on a diff in the pull request: https://github.com/apache/spark/pull/21195#discussion_r185971385 --- Diff: mllib/src/main/scala/org/apache/spark/ml/util/SchemaUtils.scala --- @@ -101,4 +102,17 @@ private[spark] object SchemaUtils { require(!schema.fieldNames.contains(col.name), s"Column ${col.name} already exists.") StructType(schema.fields :+ col) } + + /** + * Check whether the given column in the schema is one of the supporting vector type: Vector, + * Array[Dloat]. Array[Double] --- End diff -- nit: Float
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