[thelist] Oracle Sequences: was MySQL Tables for weblog
Jane Williams
jane at williams.nildram.co.uk
Sun Mar 17 13:38:01 CST 2002
On 17 Mar 2002 at 10:38, rudy wrote:
> this is a bit offtopic, so there's a tip...
Is it? Hmm, Oracle not Web.. yes, I suppose it is unless you use an Oracle backend
DB.
> > You did know that if you export and re-import your
> > Oracle DB (so as to compress and tidy up)...
>
> like a defrag? is that even necessary?
Well, it can be a good idea for all sorts of reasons, but that's getting way off-topic, I
suspect. We were moving to a new server when it hit us.
> i'm guessing your sequences started over again with low numbers, and then
> when you started inserting records, there were collisions with existing
> records?
There would have been, yes.
> you'd have to allow for this by also resetting the sequence back up to
> where it was...
Quite. Finger-poking and messing around. And we didn't know it was going to happen
until it did.
> there's only one insert statement in your application, right? i mean, one
> per table?
(laughs hysterically), no, a few more than that. This was a while ago, anyway, but it
taught me a few things I won't forget about sequences. And about using things just
because they're new without checking for the bug list first.
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