diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala index cfd9cb0e6259880df15c0c14c4bf82648c9dbf38..ed2fdf9f2f7cf2967c0ac4d56877ed9793e13efa 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala @@ -18,6 +18,7 @@ package org.apache.spark.sql import scala.collection.JavaConverters._ +import scala.util.hashing.MurmurHash3 import org.apache.spark.sql.catalyst.InternalRow import org.apache.spark.sql.catalyst.expressions.GenericRow @@ -410,6 +411,18 @@ trait Row extends Serializable { true } + override def hashCode: Int = { + // Using Scala's Seq hash code implementation. + var n = 0 + var h = MurmurHash3.seqSeed + val len = length + while (n < len) { + h = MurmurHash3.mix(h, apply(n).##) + n += 1 + } + MurmurHash3.finalizeHash(h, n) + } + /* ---------------------- utility methods for Scala ---------------------- */ /** diff --git a/sql/core/src/test/scala/org/apache/spark/sql/RowSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/RowSuite.scala index 795d4e983f27e844790e8b1728427f2641d82ff3..77ccd6f775e50d25ace3c0f0af4d5958a98046a5 100644 --- a/sql/core/src/test/scala/org/apache/spark/sql/RowSuite.scala +++ b/sql/core/src/test/scala/org/apache/spark/sql/RowSuite.scala @@ -85,4 +85,13 @@ class RowSuite extends SparkFunSuite with SharedSQLContext { val r2 = Row(Double.NaN) assert(r1 === r2) } + + test("equals and hashCode") { + val r1 = Row("Hello") + val r2 = Row("Hello") + assert(r1 === r2) + assert(r1.hashCode() === r2.hashCode()) + val r3 = Row("World") + assert(r3.hashCode() != r1.hashCode()) + } }