Awesome Grant! Thank you very much!!!
Grant Fritchey (6/17/2011)
WayneS (6/15/2011)
I've been doing some research into how temporary tables work in SQL Azure, and I have a few questions that I can't find answers for.My questions:
1. Can you build a local temp table with a user-defined data type?
nope
2. Can you build a local temp table with a user-defined function?
Nope, nope
3. Can you build a local temp table with named constraints?
Yep, that works.
4. Is the collation of local temp tables that of tempdb, or of the current database?
Not sure, how the heck do you check?
Hmm, good question. In Azure you can't access tempdb, so I've got no idea of how to test this out.
5. Are the object_id values for local temp tables positive or negative?
Positive for the one I tested.
6. Is the local temp table built in tempdb, or the current database?
Based on the query I had to run to get the object_id, it's in tempdb.
I assume your query was something like SELECT OBJECT_ID('tempdb..#table')?
Note that most of these are things that change when using a contained database in Denali, and I suspect that some of these are also changed in Azure.
Thanks!
Edit: and if you happen to have a link that documents any of these, that would be most excellent!
Hope that helps. I got most of them.
It helps a lot. You went above and beyond what I had asked you about earlier, so I thank you very much!
Okay, so in recap:
UDDT: Regular SQL: Yes; Denali: No in contained databases; Azure: No
UDF: Regular SQL: Yes; Denali: No in contained databases; Azure: No
Named constraints: Regular SQL: Yes; Denali: No in contained databases; Azure: Yes
Collation: Regular SQL: tempdb; Denali: Local DB in contained databases; Azure: ?
Local temp table object_id values: SQL <= 2008R2: Positive; Denali: Negative; Azure: Positive
Local temp table built in tempdb?: Yes
Global Temp Tables: Regular SQL: Allowed; Denali: Allowed; Azure: Denied
Wayne
Microsoft Certified Master: SQL Server 2008
Author - SQL Server T-SQL Recipes