| From: | Vitaly Burovoy <vitaly(dot)burovoy(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Serge Rielau <serge(at)rielau(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Fast AT ADD COLUMN with DEFAULTs |
| Date: | 2016-10-05 23:19:33 |
| Message-ID: | CAKOSWNnxF2WXJb=buRoS+uucurPxh1TEpOTb4DsPEEaE3rzMAA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 10/5/16, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> I wrote:
>> Need a better name for the concept, since evidently this name isn't
>> conveying the idea.
>
> Maybe "creation default" would work better? Point being it's the
> default value at the time of column creation.
Hmm... Personaly for me the original topic name is good enough.
But what I discover for myself is that we have pg_attrdef separately
from the pg_attribute. Why?
Is it time to join them? For not presented defaults it would be only
one bit per row(if we avoid "adsrc" as it is recommended), but for a
separate table it is 11 columns with two indexes now...
--
Best regards,
Vitaly Burovoy
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