using Object_id() function with #tables

Question

I want to ensure if a temporary table exists in my database or not.

I tried to use OBJECT_ID() function but it seems that I can\'t use it with temporary

Answer 1

Use

OBJECT_ID('tempdb..#foo')

to get the id for a temporary table when running in the context of another database.

Answer 2

From SQL Server Codebook

How do you check if a temp table exists?
You can use IF OBJECT_ID('tempdb..#temp') IS NOT NULL

SQL Script

--Check if it exists
IF OBJECT_ID('tempdb..#temp') IS NOT NULL
BEGIN
PRINT '#temp exists!'
END
ELSE
BEGIN
PRINT '#temp does not exist!'
END

Answer 3

Use this to change the context of the OBJECT_ID call to tempdb

OBJECT_ID('tempdb..#table')

OBJECT_ID on MSDN shows 3 part object names. In this case you can omit schema_name

OBJECT_ID ( '[ database_name . [ schema_name ] . | schema_name . ]

Answer 4

When OBJECT_ID is called, for Temporary table/Hash table TEMPDB it must be specified unless it is already working database.

I check in SQL2008 and verify below.

USE SampleDB
create table #tt1 (dummy int)
select OBJECT_ID('SampleDB..#tt1')  -- returns NULL
select OBJECT_ID('tempdb..#tt1')   -- returns ID