SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function plus (children 1)
     ExpressionList (children 2)
      Function minus (children 1)
       ExpressionList (children 2)
        Function toTime64 (children 1)
         ExpressionList (children 2)
          Literal UInt64_12
          Literal UInt64_2
        Function toIntervalMonth (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
      Function toIntervalMonth (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
