SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function quantiles (children 2)
     ExpressionList (children 1)
      Function arrayJoin (children 1)
       ExpressionList (children 1)
        Literal Array_[Float64_-inf, Float64_inf, UInt64_0]
     ExpressionList (children 1)
      Literal Float64_0.5