检查临时表是否存在

Posted 2021-02-25

Verify whether temporary table created is exists or not

--Create table
USE Norhtwind
GO
 
CREATE TABLE #temp(id INT)
 
--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
 
--Another way to check with an undocumented optional second parameter
IF OBJECT_ID('tempdb..#temp','u') IS NOT NULL
BEGIN
PRINT '#temp exists!'
END
ELSE
BEGIN
PRINT '#temp does not exist!'
END
 
 
 
--Don't do this because this checks the local DB and will return does not exist
IF OBJECT_ID('tempdb..#temp','local') IS NOT NULL
BEGIN
PRINT '#temp exists!'
END
ELSE
BEGIN
PRINT '#temp does not exist!'
END
 
 
--unless you do something like this
USE tempdb
GO
 
--Now it exists again
IF OBJECT_ID('tempdb..#temp','local') IS NOT NULL
BEGIN
PRINT '#temp exists!'
END
ELSE
BEGIN
PRINT '#temp does not exist!'
END