SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function less (children 1)
     ExpressionList (children 2)
      Function abs (children 1)
       ExpressionList (children 1)
        Function minus (children 1)
         ExpressionList (children 2)
          Function log (children 1)
           ExpressionList (children 1)
            Function exp (children 1)
             ExpressionList (children 1)
              Literal UInt64_2
          Literal UInt64_2
      Literal Float64_1e-8