Minor Description
In SqlParser.scala, there is following code.
case d ~ p ~ r ~ f ~ g ~ h ~ o ~ l =>
val base = r.getOrElse(NoRelation)
val withFilter = f.map(f => Filter(f, base)).getOrElse(base)
in the code above, there 2 variables which has same name "f" in near place.
One is receiver "f" and other is bound variable "f".
