SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function minus (alias x) (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2000-01-01 12:00:00\'
      Function toIntervalMillisecond (children 1)
       ExpressionList (children 1)
        Literal UInt64_1234567
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier x