Karol,

> Why not standard way by creating new field copy data delete old and
> rename?
> 
> It can be slow operation, is it your conern to do not take production database
> too long offline? If yes, you can speed up such process if you have access to
> good hardware with a loot of RAM and do all in memory.
> 
> I do not know also your setup and how complicated relations are as you can
> also add new field and create view which choose new field and hen you can
> divide this process in multiple update steeps.

With a 100GB database, the new/copy/delete approach is not feasible.


Sean

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