Re: [HACKERS] generated columns
От | Nico Williams |
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Тема | Re: [HACKERS] generated columns |
Дата | |
Msg-id | 20171002184641.GJ1251@localhost обсуждение исходный текст |
Ответ на | Re: [HACKERS] generated columns (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: [HACKERS] generated columns
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Список | pgsql-hackers |
On Mon, Oct 02, 2017 at 02:30:38PM -0400, Tom Lane wrote: > Nico Williams <nico@cryptonector.com> writes: > > On Mon, Oct 02, 2017 at 12:50:14PM -0400, Adam Brusselback wrote: > >> So for me, i'd rather default to compute on read, as long storing the > >> pre-computed value is an option when necessary. > > > Sure, I agree. I was just wondering whether there might be any other > > difference besides performance characteristics. The answer to that is, > > I think, "no". > > What about non-immutable functions in the generation expression? Aha, thanks! Yes, that would be noticeable. Nico -- -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
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