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Dropping #Temp Tables

Author

Topic

SQLCode
Posting Yak Master

143 Posts

Posted - 2004-12-15 : 17:52:02

Hi,

To drop a table already existing we use
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[MyTable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
Drop table [dbo].[MyTable]

To Drop a #Temp Table?

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[#MyTempTable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
Drop table [dbo].[#MyTempTable]

This does not work since it is not in sysobjects. How would I do it?
I need it for DTS

Any help is greatly appreciated.

Thanks.

nr
SQLTeam MVY

12543 Posts

Posted - 2004-12-15 : 18:27:24

You should never need to do this as you should know whether or not you have created a temp table. Created in diferent/nested bactches the temp tables are different objects.

but
if object_id('tempdb..#mytbl') is not null

==========================================
Cursors are useful if you don't know sql.
DTS can be used in a similar way.
Beer is not cold and it isn't fizzy.

clarkbaker1964
Constraint Violating Yak Guru

428 Posts

Posted - 2004-12-15 : 23:13:35

Thank's for the tip...
I usually write the drop table at the end of my process in QA but I often find myself fixing bugs and running the delete before rerunning the procedure... yea yea onerror goto blah blah blah

nr
SQLTeam MVY

12543 Posts

Posted - 2004-12-15 : 23:15:43

while i'm testing in qa I will put at the top
drop table #a
go
drop table #b
go
...

Will give errors if the table isn't there but will carry on.

==========================================
Cursors are useful if you don't know sql.
DTS can be used in a similar way.
Beer is not cold and it isn't fizzy.

Bustaz Kool
Master Smack Fu Yak Hacker

1834 Posts

Posted - 2004-12-16 : 01:21:32

In production code youi won't need this since the temp tables are dropped when they go out of scope. For debugging, you can use this technique:

create table #Junk (
pkey int primary key
)
go

if exists (
select *
from tempdb.dbo.sysobjects
where id = Object_id('tempdb.dbo.#Junk')
)
begin
drop table #Junk
end

HTH

=================================================================

Happy Holidays!

clarkbaker1964
Constraint Violating Yak Guru

428 Posts

Posted - 2004-12-16 : 02:13:04

Yea and I don't have QA close connections on completion i think that's an option so the temp table will remain as long as the connection is open... Thank guys for the additional feedback. Anyone see the osql question I posted?

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