| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Mohsen SM <mohsensoodkhah(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: typemode for variable types |
| Date: | 2014-02-24 20:24:10 |
| Message-ID: | 20140224202410.GT4759@eldon.alvh.no-ip.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Bruce Momjian escribió:
> On Sun, Feb 23, 2014 at 07:50:08AM +0330, Mohsen SM wrote:
> > Hello.
> > I have a new type similar to varchar.
> > I want to fine how did I can to calculate typemod
> > and where must I calculate typemod for this type.
>
> Well, typmods are type-specific, so there is no official way to
> calculate it. I would look at how an existing type uses typmod and copy
> that.
Our system is pretty neat. See a complex example here:
https://github.com/postgis/postgis/blob/svn-trunk/postgis/gserialized_typmod.c
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Jeff Janes | 2014-02-24 20:31:57 | Re: often PREPARE can generate high load (and sometimes minutes long unavailability) |
| Previous Message | Bruce Momjian | 2014-02-24 20:16:51 | Re: typemode for variable types |