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From: Josh Berkus <josh@agliodbs.com>
To: Jan Wieck <JanWieck@Yahoo.com>
To: Mintoo Lall <tlqmail@yahoo.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Drop temporary table only if it exists
Date: Tue, 18 Feb 2003 10:28:01 -0800
Message-ID: <200302181028.01599.josh@agliodbs.com> (raw)
In-Reply-To: <3E526F86.69391A03@Yahoo.com>
References: <20030214153413.24680.qmail@web14802.mail.yahoo.com>
	<3E526F86.69391A03@Yahoo.com>


Jan,

> > How do I drop a temporary table ( or for that matter a sequence) only
> > if it exists  or create them if they donot exist ? I want to do this
> > to avoid any errors
> 
> I wonder what type of application cannot remember if it created a temp
> object or not during the lifetime of it's database connection.

A real one, Jan.

This sort of test is particularly necessary for Exception handling routines.   
One wants the exception handler to drop all temporary obejcts for a clean 
slate, but since an exception has occurred, one cannot be sure which objects 
were created successfully.

I've personally written several such routines.  

-- 
-Josh Berkus
 Aglio Database Solutions
 San Francisco




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