| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Cc: | Aidan Van Dyk <aidan(at)highrise(dot)ca>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Hannu Krosing <hannu(at)2ndquadrant(dot)com>, "David E(dot) Wheeler" <david(at)kineticode(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: RfD: more powerful "any" types |
| Date: | 2009-09-11 14:38:04 |
| Message-ID: | 20209.1252679884@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> Is this really all that hard? I'm thinking it could be implemented by
> using the real C sprintf underneath, passing one % specifier and its
> corresponding parameter at a time, coerced to whatever the conversion
> specifier specifies.
The only disadvantage I can see of that is that it would lose precision
for NUMERIC. I'd really like to be able to write "%300.100f" and have it
Do The Right Thing with a 300-digit numeric input.
> The only thing that breaks this idea is the $n positional specifiers, I
> think.
Yeah, that's a bit of a pain too. But we have the logic for that in
src/port/. It wouldn't be that much work to repurpose it. Actually,
since a SQL implementation wouldn't be constrained to read the actual
arguments left-to-right, you could probably simplify it a great deal.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2009-09-11 14:40:30 | Re: community decision-making & 8.5 |
| Previous Message | Tom Lane | 2009-09-11 14:30:42 | Re: RfD: more powerful "any" types |