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 How to make this query sargable		  New Topic  Reply to Topic
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sql-lover
Yak Posting Veteran

54 Posts
Posted - 08/01/2012 :  16:21:23  Show Profile  Reply with Quote
Hi,

Got a query that is so slow, that just returns a timeout error to the user, via application.

I checked the store procedure and execution plan and I believe this is the reason:

WHERE TimeAdded between @StartDate and DATEADD(d, 1, @EndDate)

How can I change that statement, while keeping logic, to a sargable one? I though about using >= and < plus and AND operator, removing the BETWEEN, but I have not tested it yet.

Any suggestion is highly appreciated.

Thanks.

visakh16
Very Important crosS Applying yaK Herder

India
47023 Posts
Posted - 08/01/2012 :  16:35:10  Show Profile  Reply with Quote
why do you think the above condition is NOn sargeable?

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SQL Server MVP
http://visakhm.blogspot.com/
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robvolk
Most Valuable Yak

USA
15557 Posts
Posted - 08/01/2012 :  16:35:49  Show Profile  Visit robvolk's Homepage  Reply with Quote
That should already be sargable, if not:
SET @EndDate=DATEADD(d, 1, @EndDate)
...
WHERE TimeAdded between @StartDate and @EndDate
What do you mean by "sargable" anyway? If you're selecting all or most of the columns, and the date range is not very selective a table scan may likely be the most efficient. Make sure your statistics are up to date.
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sql-lover
Yak Posting Veteran

54 Posts
Posted - 08/01/2012 :  16:49:54  Show Profile  Reply with Quote
Ignore... no caffeine today ...

The issue is lack of a proper Index. It was working before (as per the developer) a few years ago, but we do have much more data now.

I'll deploy a proper Index and validate.
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visakh16
Very Important crosS Applying yaK Herder

India
47023 Posts
Posted - 08/01/2012 :  16:57:33  Show Profile  Reply with Quote
quote:
Originally posted by sql-lover

Ignore... no caffeine today ...

The issue is lack of a proper Index. It was working before (as per the developer) a few years ago, but we do have much more data now.

I'll deploy a proper Index and validate.

No problem
let us know the outcome

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SQL Server MVP
http://visakhm.blogspot.com/
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