On Thu, Sep 14, 2017 at 4:45 PM, Rafal Pietrak <rafal@ztk-rp.eu> wrote:
> Can anybody help me find a way to implement an ID which:
>
> 1. guarantees being unique across multiple tables.
>
> 2. guarantees its uniqueness not only during INSERT, but also during the
> lifetime of the database/application (e.i. during future UPDATES).
>
> 3. guarantees persistence of value across database backup/restore/upgrade.
> [...]
> I'd appreciate any hints, as I'm bitting my head against this problem
> for a long time, now.
UUID would give you some room for requirement 1. 2 and 3 can be found
with the usage of a serial column.
--
Michael
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