Re: Best Approach for Swapping a Table with its Copy - Mailing list pgsql-general

From Laurenz Albe
Subject Re: Best Approach for Swapping a Table with its Copy
Date
Msg-id f36f10b8e9e7ebd00ed32fc713d29c38a6c8f04a.camel@cybertec.at
Whole thread Raw
In response to Re: Best Approach for Swapping a Table with its Copy  (Marcelo Fernandes <marcefern7@gmail.com>)
List pgsql-general
On Thu, 2025-02-13 at 11:04 +1300, Marcelo Fernandes wrote:
> > I am not seeing how this can be done without some outage for that table.
> 
> Swapping tables without an outage is possible.

Yes, but only if you are willing to write C code that runs inside the
database server.  That way, you can do anything (and cause arbitrary
damage).

The big challenge here would be to do the swap in a safe way.  How do
you intend to guarantee that the foreign keys are valid without a table
scan?  How do you handle concurrent data modifications?

Yours,
Laurenz Albe

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