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Added eval for Rand (without any support for user-defined seed). #349

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Added eval for Rand (without any support for user-defined seed). #349

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13 changes: 10 additions & 3 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Rand.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -17,11 +17,18 @@

package org.apache.spark.sql.catalyst.expressions

import java.util.Random
import org.apache.spark.sql.catalyst.types.DoubleType


case object Rand extends LeafExpression {
def dataType = DoubleType
def nullable = false
def references = Set.empty
override def dataType = DoubleType
override def nullable = false
override def references = Set.empty

private[this] lazy val rand = new Random

override def eval(input: Row = null) = rand.nextDouble().asInstanceOf[EvaluatedType]

override def toString = "RAND()"
}