compare of -0.0 < 0.0 return true

 val spark: SparkSession = SparkSession
      .builder()
      .master("local")
      .appName("SparkByExamples.com")
      .getOrCreate()
    spark.sparkContext.setLogLevel("ERROR")

    import spark.sqlContext.implicits._

    val df = Seq((-0.0, 0.0)).toDF("neg", "pos")
      .withColumn("comp", col("neg") < col("pos"))
      df.show(false)

======

+----+---+----+
|neg |pos|comp|
+----+---+----+
|-0.0|0.0|true|
+----+---+----+

scala> spark.version
res0: String = 2.4.6

scala> Seq((-0.0, 0.0)).toDF("neg", "pos").withColumn("comp", col("neg") < col("pos")).show
+----+---+-----+
| neg|pos| comp|
+----+---+-----+
|-0.0|0.0|false|
+----+---+-----+