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Home > Archive > Microsoft SQL Server forum > July 2005 > Help on creating a user function.
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Help on creating a user function.
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| When I declare a cursor,I use a variable to replace the sql statement:
DECLARE rs CURSOR LOCAL FAST_FORWARD FOR
@sqlPlan
But it is not true.Who can correct for me.
Another question is :
How to execute a sql statement state by a variable "@sqlPlan" and
insert the result to a table "@FeatRequestStatus"?
I am a new hand of sql programming.Thank you very much for your help
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| When I use:
insert @FeatRequestStatus
exec @sqlPlan
It says "execute can be used as a source when insert into a table viarable"
"Kevin" <hua@lucent.com> wrote in message
news:dc2mgs$16f@netn
ews.proxy.lucent.com...
> When I declare a cursor,I use a variable to replace the sql statement:
> DECLARE rs CURSOR LOCAL FAST_FORWARD FOR
> @sqlPlan
> But it is not true.Who can correct for me.
>
> Another question is :
> How to execute a sql statement state by a variable "@sqlPlan" and
> insert the result to a table "@FeatRequestStatus"?
>
> I am a new hand of sql programming.Thank you very much for your help
>
>
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| Erland Sommarskog 2005-07-25, 8:29 pm |
| Kevin (hua@lucent.com) writes:
> When I declare a cursor,I use a variable to replace the sql statement:
> DECLARE rs CURSOR LOCAL FAST_FORWARD FOR
> @sqlPlan
> But it is not true.Who can correct for me.
You need to say:
EXEC ('DECLARE rs CURSOR GLOBAL FAST_FORWARD ' + @sqlPlan)
Note that I changed LOCAL to GLOBAL here. This is necessary, since the
cursor is accessed from a different scope than it is created.
> Another question is :
> How to execute a sql statement state by a variable "@sqlPlan" and
> insert the result to a table "@FeatRequestStatus"?
INSERT EXEC does not work with table variables, as you have experienced.
Use a temp table instead.
And if @sqlPlan is an SQL statement, the syntax is
EXEC(@sqlPlan)
The syntax you had on your other post:
EXEC @sqlPlan
means "execute the stored procedure of which the name is in @sqlPlan".
> I am a new hand of sql programming.Thank you very much for your help
In such case, I should maybe point out, that cursors is something
to be used sparingly. There are situations where cursors can be
motivated, but they often come with a price of severly reduced
performance. Work set-based if you can.
Dynamic SQL is not really anything for beginners - it's definitely an
advanced feature. Dynamic SQL makes things a lot more complex, and
avoid if you can. I have a longer article on dynamic SQL on my web
site that you could find useful:
http://www.sommarskog.se/dynamic_sql.html
--
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se
Books Online for SQL Server SP3 at
http://www.microsoft.com/sql/techin.../2000/books.asp
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