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 lgamma (children 1)
           ExpressionList (children 1)
            Literal UInt64_4
          Literal Float64_1.791759469
      Literal Float64_1e-8