SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function minus (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2018-12-18 01:02:03\'
      Function toIntervalMonth (children 1)
       ExpressionList (children 1)
        Literal UInt64_5