Re: uuid c function contrib

On Tue, Oct 17, 2006 at 03:25:05PM -0400, Ron Peterson wrote:

> I've written some PostgreSQL C functions which expose the functionality
> of Theodore Ts'o's UUID library. I need to add a few sanity clauses
> here and there, but working (mostly) code can be found here:
>
> http://www.yellowbank.com/code/PostgreSQL/uuid/

> I have one problem. My y_uuid_time function works on my laptop
> (Kubuntu/Dapper), but not on another box (Debian Sarge).

The usual remedy of walking away from the problem and coming back fresh
helped me realize my stupid mistake. I still believe in sanity clauses,
so I have a little more finessing to do, but the posted code works.

Implements uuid_generation functions which return bytea values, a
function to convert the bytea values to the canonical hex form, and a
function to extract the time from time-based uuids. If you can use
this, please do.

Examples:

rpeterso=# select y_uuid_to_hex( y_uuid_generate() );
y_uuid_to_hex
--------------------------------------
0bf56bb1-1e47-472f-82a8-cc8134d23d91
(1 row)

rpeterso=# select y_uuid_to_hex( y_uuid_generate_random() );
y_uuid_to_hex
--------------------------------------
8e239390-1bd2-4b01-9ad9-8b3f0cfbb5b5
(1 row)

rpeterso=# select y_uuid_to_hex( y_uuid_generate_time() );
y_uuid_to_hex
--------------------------------------
e3a3a694-5e43-11db-82ad-0014bf7c74ed
(1 row)

rpeterso=# select y_uuid_time( y_uuid_generate_time() );
y_uuid_time
----------------------------
2006-10-17 20:59:25.101671

Best.

--
Ron Peterson
https://www.yellowbank.com/