the current behavior of ODBC is that it ignores the time zone field in Timestamp data, assumes all timestamp data is UTC during interpretation. The Arrow compute ...
SELECT TO_UNIXTIME(COALESCE(TRY(DATE_PARSE(CAST(mytime AS VARCHAR), '%Y-%m-%d %T')), PARSE_DATETIME(CAST(mytime AS VARCHAR), 'yyyy-MM-dd HH:mm:ss'))) FROM table1 ...