percentil UDAF in spark 1.2.0

[Mohnish Kodnani]

Hi,
I am trying to use percentile and getting the following error. I am using
spark 1.2.0. Does UDAF percentile exist in that code line and do i have to
do something to get this to work.

java.util.NoSuchElementException: key not found: percentile
        at scala.collection.MapLike$class.default(MapLike.scala:228)
        at scala.collection.AbstractMap.default(Map.scala:58)
        at scala.collection.mutable.HashMap.apply(HashMap.scala:64)
        at
org.apache.spark.sql.catalyst.analysis.SimpleFunctionRegistry.lookupFunction(FunctionRegistry.scala:53)
        at
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveFunctions$$anonfun$apply$10$$anonfun$applyOrElse$2.applyOrElse(Analyzer.scala:220)
        at
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveFunctions$$anonfun$apply$10$$anonfun$applyOrElse$2.applyOrElse(Analyzer.scala:218)
        at
org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:144)
        at
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:162)


Thanks
mohnish