| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
| Cc: | Gregory Stark <stark(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Fixed length data types issue |
| Date: | 2006-09-07 14:27:25 |
| Message-ID: | 5188.1157639245@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Martijn van Oosterhout <kleptog(at)svana(dot)org> writes:
> On Thu, Sep 07, 2006 at 11:57:26AM +0100, Gregory Stark wrote:
>> Just brain storming here. But what happens if we make Datum 2*sizeof(pointer)
>> and stored the typmod and/or attlen in it?
> The fundamental property of a Datum is that you can pass it by value to
> a C function. This generally means it has to fit in a register. On the
> whole, the CPU register size is the same as the pointer size, so
> 2*sizeof(pointer) is unlikely to fit...
Not to mention the problem that such a change would break every single
datatype-manipulation function in both the core backend and every
user-written datatype. I don't think we're going there.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Dave Page | 2006-09-07 14:32:31 | Re: getting access to gborg, specifically the jdbc CVS files |
| Previous Message | Gevik Babakhani | 2006-09-07 13:35:59 | Re: UUID/GUID discussion leading to request for |