SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Literal \'2018-01-12 22:33:44.55\' (alias s)
    Function toDateTime64 (alias datetime64) (children 1)
     ExpressionList (children 2)
      Identifier s
      Literal UInt64_6
   ExpressionList (children 1)
    Function fromUnixTimestampInJodaSyntax (children 1)
     ExpressionList (children 3)
      Identifier datetime64
      Literal \'SSSSSS\'
      Literal \'UTC\'
