Hi Doug, Thanks for the reply. Incidentally, they did use to use re-cycled parchments, called palimpsests, in ancient times. There was a magazine article I read recently about some writings of Aristotle (or one of his students/descendants) being recovered. His manuscripts had been bleached and re-used by monks producing illustrated bibles - but his technology was superior, and he had used an ink that penetrated deeply into the page whereas the monks' ink just stuck to the surface, so in modern times, the original writing could be restored. Now *that's* a database recovery!
So let's say I had a database, created a tablespace with one datafile, created a user with a default of that tablespace, did a bunch of transactions, committed them, then dropped the tablespace. I know that the datafile is "compatible" with the instance, because it came from there. The datafile contains all the data from the transactions. Is it just useless now? Can the data be recovered back into the original instance from this datafile? I know I could get it back by recovering from the last hotbackup and rolling forward with archived redo logs, but it just seems a little strange that datafiles can be "orphaned" like this... Hmmm. Cheers, g -----Original Message----- Sent: 02 November 2001 14:05 To: Guy Hammond; Multiple recipients of list ORACLE-L Guy, The 'drop tablespace' command does a number of items. It purges the data dictionary of all references to that tablespace, removes the file information from the control file, closes the datafile(s) and releases them back to the operating system. All that being said, if you then want to reuse the datafile as a new tablespace then you have to wipe it. The simplest reason being that you may be using it in a database with a different block size. Look at it this way, if you were starting to write a new book, would you use a notepad of erased paper? If you did there might end up being some very interesting side notes running around. Dick Goulet ____________________Reply Separator____________________ Author: "Guy Hammond" <[EMAIL PROTECTED]> Date: 11/2/2001 5:40 AM Hello all, When a tablespace is dropped, the datafile is left on the disk. What exactly is the drop tablespace command doing, and is there a way to get that datafile and "re-attach" to a new tablespace in some way? For example, creating a tablespace using that datafile, but without wiping it, as the "reuse" clause does? Thanks, g -- Guy Hammond AVT Technologies Classic House 174-180 Old Street London EC1V 9BP Desk: 020 7454 4174 Mobile: 07966 164687 Web: http://www.avt.co.uk/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Guy Hammond 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Guy Hammond 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).