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Message Posted: Wed, 28 May 2003 @ 14:51:14 GMT


     
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Subj:   Re: Alter table vs. create copy for add column
 
From:   Doug Cox

Exactly Michael! I would always make a backup of a production table before an Alter to backout with - I'm just paranoid like that. So if I do that I'm still wasting the space but at least I could backout.

To save space I'd insert into the new table without any indecies except the primary. Then check out to see if the insert worked - drop the old one - rename the new one then put the NUSI/USI back... Maybe even drop the secondary indecies off the original table during the process as well to save space..

Like I said before - this scenario really depends on many things.. Space - Timing - user access...

Doug



     
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