| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
| Cc: | Celia McInnis <celia(dot)mcinnis(at)gmail(dot)com>, "pgsql-generallists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: altering a column to to make it generated |
| Date: | 2024-04-22 20:11:43 |
| Message-ID: | 3155442.1713816703@sss.pgh.pa.us |
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| Lists: | pgsql-general |
"David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> writes:
> On Mon, Apr 22, 2024 at 12:42 PM Celia McInnis <celia(dot)mcinnis(at)gmail(dot)com>
> wrote:
>> Can I alter a table column to now make it generated? I tried this
>> unsuccessfully:
> I looked at all of the "alter table ... alter column" commands listed here:
> https://www.postgresql.org/docs/current/sql-altertable.html
> And none seem to involve the generated expression column. So the answer is
> no.
I think what you'd need to do is drop the existing column
and then add a generated column.
regards, tom lane
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