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Re: Add column(s) to an existing table
- From: "Alex Gorbachev" <gorbyx@xxxxxxxxx>
- To: Roger.Xu@xxxxxxxxxxx
- Date: Tue, 1 Aug 2006 23:59:04 +0200
The columns will be created by default nullable and this will be very
fast. Note, that Oracle still will nees an exclusive lock on the table
for a very short moment (like a second). After that you can start
populating columns.
What you should take care of is that you don't cause a situation with
many migrated rows when populating these columns later.
2006/8/1, Roger Xu <Roger.Xu@xxxxxxxxxxx>:
Does the following SQL touch every single row immediately?
ALTER TABLE supplier
ADD (supplier_tax_id varchar2(10),
supplier_timezone varchar2(5) );
--
Best regards,
Alex Gorbachev
http://blog.oracloid.com
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