hi, when one creates a snapshot log ( with rowid ) the following table structure is created Name Null? Type ----------------------------------------- -------- ---------------------- ------ 1. M_ROW$$ VARCHAR2(255) 2. SNAPTIME$$ DATE 3. DMLTYPE$$ VARCHAR2(1) 4. OLD_NEW$$ VARCHAR2(1) 5. CHANGE_VECTOR$$ RAW(255) the first column holds the rowid, the 3rd the type of dml. any idea what the others contail ? the second column contains a fixed date '01-Jan-4000 00:00' ? In earlier versions ( 7.0.x ) it used to contain a null for a similar snapshot log. what is the significance of logging/nologging in snapshot creation. in case of a recovery as and when the data is recovered from the logs the triggers would anyway fire and populate the mlog$_ tables ? regards, joseph raj kumar -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Joseph Raj INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).