in connector/src/main/scala/org/apache/spark/sql/cassandra/PredicateOps.scala [94:103]
override def isSingleColumnPredicate(p: Filter): Boolean =
isRangePredicate(p) || isEqualToPredicate(p) || isInPredicate(p)
override def isRangePredicate(p: Filter): Boolean = p match {
case _: sources.LessThan => true
case _: sources.LessThanOrEqual => true
case _: sources.GreaterThan => true
case _: sources.GreaterThanOrEqual => true
case _ => false
}