diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/random.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/random.scala index 6e4e9cb1be090..fb586afc5ea1e 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/random.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/random.scala @@ -37,7 +37,11 @@ abstract class RDG(seed: Long) extends LeafExpression with Serializable { * Record ID within each partition. By being transient, the Random Number Generator is * reset every time we serialize and deserialize it. */ - @transient protected lazy val rng = new XORShiftRandom(seed + TaskContext.get().partitionId()) + @transient protected lazy val partitionId = TaskContext.get() match { + case null => 0 + case _ => TaskContext.get().partitionId() + } + @transient protected lazy val rng = new XORShiftRandom(seed + partitionId) override def deterministic: Boolean = false diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RandomSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RandomSuite.scala new file mode 100644 index 0000000000000..9be2b23a53f27 --- /dev/null +++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RandomSuite.scala @@ -0,0 +1,33 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.sql.catalyst.expressions + +import org.scalatest.Matchers._ + +import org.apache.spark.SparkFunSuite +import org.apache.spark.sql.catalyst.dsl.expressions._ +import org.apache.spark.sql.types.{DoubleType, IntegerType} + + +class RandomSuite extends SparkFunSuite with ExpressionEvalHelper { + + test("random") { + val row = create_row(1.1, 2.0, 3.1, null) + checkDoubleEvaluation(Rand(30), (0.7363714192755834 +- 0.001), row) + } +}