Archives of the TeradataForum
Message Posted: Wed, 28 May 2003 @ 14:51:14 GMT
| Subj: | | Re: Alter table vs. create copy for add column |
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| 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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