Comments on: SQL SERVER – Converting Stored Procedure into Table Valued Function

By: Pinal Dave

Pinal Dave — Tue, 23 Mar 2010 12:27:00 +0000

Hello Ting,

I think when used in JOIN, the TVF executed multiple times (depends on the number of records in other joined tables)while in SELECT statement, it is executed once.
So using the temporary table is better way to process its result.

Regards,
Pinal Dave

By: Ting

Ting — Mon, 22 Mar 2010 18:58:22 +0000

I have a question about the TVF. When performing a SELECT on the TVF, the result was return in less than a second. But when the TVF is used in a join statement, it took about 4 minutes to run! I was wondering why it’s so slow when used in the JOIN?

On the other hand, if the TVF is loaded first into a temp table, then use this temp table in the JOIN, the result was under 15 seconds.

By: AZ

AZ — Fri, 05 Feb 2010 11:03:53 +0000

Hello! Could you give me a link to the original article about converting a stored procedure into a table valued function? I can’t find any obvious links to it from this page…
Thank you!

By: sanjay

sanjay — Sun, 22 Nov 2009 06:47:42 +0000

Thanx :)

By: RH

RH — Thu, 15 Oct 2009 22:28:42 +0000

You said “Moreover, if the SP has DML statements such as DELETE, UPDATE, INSERT or MERGE, it cannot be converted to a TVF. The usage of TVF is limited to the SELECT statement only.”

That is true of an in-line TVF, but not true of a multi-statement TVF. If you could not INSERT into the table defined in the return of a multi-statement TVF there would not be anything to RETURN.

It would be correct if you added the exception stated in Books Online, “except to table variables”.

By: Muhammed Ismail

Muhammed Ismail — Sat, 10 Oct 2009 08:59:26 +0000

how to insert data in two tables to use one Store Procedure

By: pinaldave

pinaldave — Thu, 17 Sep 2009 17:56:34 +0000

Sure,

I am reposting my original article in a day or so, as I found something new in regards to that article.

Kind Regards,
Pinal

By: 8kb

8kb — Thu, 17 Sep 2009 17:42:14 +0000

Hi Pinal,

Can you provide a link to the original article about converting stored procedures to TMVs?

By: Ritesh Shah

Ritesh Shah — Thu, 17 Sep 2009 07:09:40 +0000

Well, this is indeed a good discussion. according to me, if we are having just one SELECT statement which is returning one result sets than it would be good to convert it into TVF because we can join that result set to other SELECT statement.

while using SP, you can’t join it with anything else directly.