Re:reattaching datafiles

From: <dgoulet_at_vicr.com>
Date: Fri, 02 Nov 2001 06:02:21 -0800
Message-ID: <F001.003BB43F.20011102061018@fatcity.com>

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" <guy.hammond_at_avt.co.uk>
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,

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Guy Hammond
AVT Technologies
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