SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toDateTimeOrZero (children 1)
     ExpressionList (children 2)
      Function arrayJoin (children 1)
       ExpressionList (children 1)
        Literal Array_[\'\', \'2018\', \'2018-01-02 01:02:03\', \'2018-01-02T01:02:03\', \'2018-01-02 01:02:03 abc\']
      Literal \'UTC\'
