| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Josh Berkus <josh(at)agliodbs(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: ALTER TABLE ... REPLACE WITH |
| Date: | 2010-12-15 00:33:34 |
| Message-ID: | 1292373214.2737.5178.camel@ebony |
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| Lists: | pgsql-hackers |
On Tue, 2010-12-14 at 16:19 -0800, Josh Berkus wrote:
> Without some means of doing a clone of the table in a single command,
> you've eliminated half the scripting work, but not helped at all with
> the other half.
I'm not trying to eliminate scripting work, I'm trying to minimise the
lock window with a reliable and smooth atomic switcheroo.
> Actually, you know what would be ideal?
>
> REPLACE TABLE old_table WITH SELECT ...
>
> Give it some thought ...
I have; the above would hold the lock window open while the SELECT runs
and that is explicitly something we are trying to avoid.
Good creative input though, thank you.
--
Simon Riggs http://www.2ndQuadrant.com/books/
PostgreSQL Development, 24x7 Support, Training and Services
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