in src/main/scala/org/apache/spark/sql/datasketches/kll/expressions/KllDoublesSketchExpressions.scala [58:66]
override def inputTypes: Seq[AbstractDataType] = Seq(KllDoublesSketchType)
override def dataType: DataType = DoubleType
override def nullSafeEval(input: Any): Any = {
val bytes = input.asInstanceOf[Array[Byte]]
val sketch = KllDoublesSketch.wrap(Memory.wrap(bytes))
sketch.getMinItem
}