query runs fine when used "IS NOT NULL" ,doesnt works when searched with a value

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query runs fine when used "IS NOT NULL" ,doesnt works when searched with a value

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Johan Bijnens SSC Guru Points: 135551 More actions · Answer 1

sqldba_icon (10/19/2010)
Can we do it without exec plan? it has some confidential data, i will try to modify and put it here. Thanks

As Leo stated, a sqlplan will not reveal data at all !!

It will show objects and object statistics interpretation that was used to generate the sqlplan itself.

Please post the actual plan of your query and not a modified solution at a test server where the statistics of the db will not represent that actual db.

It probably will generate a different plan.

Johan

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curious_sqldba SSC-Dedicated Points: 36502 More actions · Answer 2

You are right. The dev team made changes to the view. But if i would like to find out more about statistics, if the number of actual rows and estimated rows differ does that mean it has bad statistics?

Johan Bijnens SSC Guru Points: 135551 More actions · Answer 3

it depends ....

have a look at Dissecting SQL Server Execution Plans

http://www.simple-talk.com/sql/performance/execution-plan-basics/