Thank You Fuhr. In select lo_unlink(objid) from (select distinct objid from filetbl)AS s; the above query what is that 'S' stands for in AS 'S' Can u pls explain me.....
----- Original Message ----- From: "Michael Fuhr" <[EMAIL PROTECTED]> To: "sandhya" <[EMAIL PROTECTED]> Cc: "Postgres" <pgsql-admin@postgresql.org> Sent: Thursday, February 23, 2006 8:58 PM Subject: Re: [ADMIN] large object unlinking > On Thu, Feb 23, 2006 at 01:24:43PM +0530, sandhya wrote: > > Is there any possibility to delete /Unlink a group of large objects at a time? > > Please tell me .To test my application i have loaded somany files into database. > > Now i want to unlink all those objects. > > You could call lo_unlink() in a query. Example: > > SELECT lo_unlink(loid) FROM (SELECT DISTINCT loid FROM foo) AS s; > > See also contrib/vacuumlo, which will automatically remove large > objects that aren't referenced anywhere. > > -- > Michael Fuhr > > ---------------------------(end of broadcast)--------------------------- > TIP 6: explain analyze is your friend > ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match