From: Mario Splivalo <mario.splivalo@mobart.hr>
To: pgsql-sql@postgresql.org
Subject: PostgreSQL and uuid/guid
Date: Mon, 02 Jan 2006 14:26:14 +0100
Message-ID: <1136208374.11482.31.camel@localhost.localdomain> (raw)
Hello all.
While browsing the web I've seen that many people 'need' the ability to
create uuid/guid values from within the PostgreSQL. Most of them are
switching from MSSQL, and they're missing the newid() function, which in
MSSQL created the uuid/guid value.
Now I'm in need of such function too. I'm finaly putting together
MSSQL-like-merge-replication for PostgreSQL, and the guid/uuid values
would come more than handy here.
Let's pretend for a moment here that I'm not satisfied with any other
solution (for instance, assigning IDs for each replication 'subscriber',
and then combining that ID with sequence generated numbers to have
unique ID's within the replication system), and that I realy need
guid/uids.
I've found source code for the guid/uuid. There is a program, called
uuidgen, wich creates the uuid. uuidgen is part of the libuuid1 package
from Debian/GNU. The sources are in the e2fsprogs pacgages, where I
found the source for the uuidgen.
Now, it should be possible to create postgresql function (in python,
forn instance) wich would call the uuidgen program, but that approach
seems rather slow.
I'd like to have postgresql function written in C that would call
uuid_generate
(http://www.die.net/doc/linux/man/man3/uuid_generate.3.html).
Considering what is said for the uuidgen manpage (concerning random and
pseudorandom generated numbers) I feel that uuids generated this way are
what I need.
What is the general feeling concerning the uuid issue I explained above?
I've never written a C postgreSQL function, and any help (or
documentation pointout) would be greatly appreciated.
If I posted this to the wrong mailing list, please point me out to the
correct one.
Mario
--
Mario Splivalo
Mob-Art
mario.splivalo@mobart.hr
"I can do it quick, I can do it cheap, I can do it well. Pick any two."
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To: pgsql-sql@postgresql.org
Cc: mario.splivalo@mobart.hr
Subject: Re: PostgreSQL and uuid/guid
In-Reply-To: <1136208374.11482.31.camel@localhost.localdomain>
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