SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function now64 (children 1)
     ExpressionList (children 2)
      Function if (children 1)
       ExpressionList (children 3)
        Literal NULL
        Literal NULL
        Function if (children 1)
         ExpressionList (children 3)
          Literal NULL
          Literal Float64_nan
          Function toFloat64 (children 1)
           ExpressionList (children 1)
            Identifier number
      Literal NULL
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_2