I wrote:
> No, that is an actual on-disk change (making the field physically
> wider), so it's going to cost ya. There are some cases where the
> on-disk representation doesn't change and so a catalog update isn't
> needed, but int4->int8 isn't one of them.
Sheesh, hit send too quickly on that. Of course I meant "and so a
catalog update is all that's needed".
regards, tom lane
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