Re: [HACKERS] [GENERAL] Bug with sequence
Tom Lane <tgl@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
To: "Thomas O'Connell" <tfo@monsterlabs.com>
Cc: pgsql-hackers@postgresql.org, pgsql-sql@postgresql.org
Date: 2002-11-21T19:30:14Z
Lists: pgsql-hackers, pgsql-general
"Thomas O'Connell" <tfo@monsterlabs.com> writes: > It seems worth pointing out, too, that some SQL purists propose not > relying on product-specific methods of auto-incrementing. > I.e., it is possible to do something like: > insert into foo( col, ... ) > values( coalesce( ( select max( col ) from foo ), 0 ) + 1, ... ); > and this is easily placed in a trigger. ... but that approach is entirely unworkable if you want any concurrency of insert operations. (Triggers are a tad product-specific, too :-() regards, tom lane