Are temporary tables thread-safe?

Question

I\'m using SQL Server 2000, and many of the stored procedures it use temp tables extensively. The database has a lot of traffic, and I\'m concerned about the thread-safety of cr

Answer 1

First let's make sure you are using real temp tables, do they start with # or ##? If you are creating actual tables on the fly and then dropping and recreating them repeatedly, you will indeed have problems with concurrent users. If you are createing global temp tables (ones that start with ##) you can also have issues. If you do not want concurrency issues use local temp tables (They start with #). It is also a good practice to explicitly close them at the end of the proc (or when they are no longer needed by the proc if you are talking long multi-step procs) and to check for existence (and drop if so) before creating.