Slow query due to variable

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Jose Mayorga asked Dec 17, '09

Slow query due to variable

Hello everyone,

this query is driving me crazy The problem is that when I'm in a server and execute a query against another server, it works well when I use hardcoded values but turns terrible slow when I use a variable. I've looked everywhere but haven't got the right answer. This problem exist in queries and Stored Procedures. I've tried this with parameters instead of variables and the problem persists.

The weird thing is that two days ago I was able to execute the query qith the variable without problems.

Any insight will be welcome

Thanks

USE DataBaseInServerA

Declare @date smalldatetime
Set @date = ‘1987-03-15’
Select * from ServerB.asd.dbo.person
Where birthday = '1987-03-15' --- < This works perfectly

Select * from ServerB.asd.dbo.person
Where birthday = @date --- < This takes toooo long

t-sql query

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Answer 1 · 2009-12-17T21:04:15Z

Jose Mayorga answered Dec 17, '09

Now it works fine. The problem was an option in the server.

Under this path:

Server Objects - Providers - SQLOLEDB

I activated the 'Dynamic parameters' option and that was it! silly, uh?

The problem was that the ServerB was sending the whole table and ServerA was applying the filter instead of pasing the parameter value so the ServerB could apply the filter

1

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Rob Farley commented · Dec 17, 2009 at 11:45 PM

Yup, that'd do it. Good that you asked (and answered), because it will hopefully help someone else who has the same problem with their linked servers. Make sure you mark it as the accepted answer.

5 ·

Answer 2 · 2010-03-10T06:06:53Z

Murat answered Mar 10, '10

i couldnt find the place to change the settings. :/

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