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_1
          Literal UInt64_1
      Literal Float64_1e-8