Temporary tables are not working in MSSQL as they are in Mysql

Question

Hi,
I have migrated DB from mysql from MS-SQL Server. I have used temporary tables in the query.
I am creating a temporary table at runtime and using them in successive queries for joins.
Following is the syntax.
<small></small>
if object_id('tempdb..##tbl_temp_csuid') is not null
BEGIN
DROP TABLE ##tbl_temp_csuid
END;
SELECT DISTINCT u2.csuid,u2.firstname INTO ##tbl_temp_csuid
FROM users u2
INNER JOIN users_cache uc on uc.id = u2.id
INNER JOIN users u1 on uc.ownerid = u1.id
This is working but not getting dropped when session is completed.
I have tried by adding # to the table name, but in that way it is lost for the next query..
Is there any solution for this..?
I want temporary table to persist for php session.
 Thanks in advance for any help..!
<small></small>
<small></small>

Answer 1

Ideally, you want the session from where you query your temptable be the same as the session that created the table table. If you achieve that, then local #temptables will work for you. Since you are saying that the temp table isn't available when you query
it, then obviously this is a different session. This is where I would start. Perhaps there's a setting in your programming environment to keep sessions from when you created the temp table and when you query it.
A global ##temptable will be destroyed when the creating session is terminated (or when a session is being put into a connection pool, using sp_reset_connection, I believe). So if you aren't seeing global temptables being destroyed, then again you need to
troubleshoot the session handling from your programming environment.
Tibor Karaszi, SQL Server MVP |
web | blog