Why is SQLImplicits an abstract class rather than a trait?

[assaf.mendelson]

Hi all,

I have been playing a bit with SQLImplicits and noticed that it is an
abstract class. I was wondering why is that? It has no constructor.

Because of it being an abstract class it means that adding a test trait
cannot extend it and still be a trait.

Consider the following:

    trait MySparkTestTrait extends SQLImplicits {
      lazy val spark: SparkSession = SparkSession.builder().getOrCreate()
      protected override def _sqlContext: SQLContext = spark.sqlContext
    }


This would mean that if I can do something like this:


    class MyTestClass extends FunSuite with MySparkTestTrait {
        test("SomeTest") {
            // use spark implicits without needing to do import
spark.implicits._
        }
    }

Is there a reason for this being an abstract class?



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