SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function formatDateTime (children 1)
     ExpressionList (children 2)
      Function toDateTime64 (children 1)
       ExpressionList (children 2)
        Literal \'2010-01-04 12:34:56\'
        Literal UInt64_0
      Literal \'%f\'
   Set