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help / color / mirror / Atom feedFrom: Laurenz Albe <[email protected]>
To: Marcelo Fernandes <[email protected]>
To: Adrian Klaver <[email protected]>
Cc: [email protected]
Subject: Re: Best Approach for Swapping a Table with its Copy
Date: Thu, 13 Feb 2025 07:37:50 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAM2F1VONo8M9gcybhmf8-CdmRUC2QrFGZkZLYF-+uLZuhRKaxQ@mail.gmail.com>
References: <CAM2F1VP9nn0F6fSjbmhJCNSjv-dbAJcAytZ2HkTkZ0dGYZvxrw@mail.gmail.com>
<[email protected]>
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<[email protected]>
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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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