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 cos (children 1)
           ExpressionList (children 1)
            Function divide (children 1)
             ExpressionList (children 2)
              Function pi (children 1)
               ExpressionList
              Literal UInt64_4
          Function divide (children 1)
           ExpressionList (children 2)
            Literal UInt64_1
            Function sqrt (children 1)
             ExpressionList (children 1)
              Literal UInt64_2
      Literal Float64_1e-9