Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7752#discussion_r35800780
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
---
@@ -179,14 +179,12 @@ private[spark] class MatrixUDT extends
UserDefinedType[Matrix] {
val tpe = row.getByte(0)
val numRows = row.getInt(1)
val numCols = row.getInt(2)
- val values = row.getAs[Seq[Double]](5, ArrayType(DoubleType,
containsNull = false)).toArray
+ val values = row.getArray(5).toArray.map(_.asInstanceOf[Double])
--- End diff --
actually i think in general we should have specialized getters even for
toArray, and just call then. under the hood we can store them as objects and
optimize them later, but it'd make the caller easier.
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