-
Book Overview & Buying
-
Table Of Contents
Microsoft SQL Server 2012 Performance Tuning Cookbook
As plan guides can be used to specify query hints for SQL statements, they can also specify an execution plan instead of query hints to force an execution plan.
In this recipe, we first observe that even though there is a non-clustered index on ProductID column, some of the values of ProductID cause an index scan operation when data is retrieved. We will create an SQL plan guide so that all the queries as specified by the plan guide performs the index seek operation for every ProductID by forcing a previously saved execution plan.
We will see that ProductID 806 causes an index seek operation while ProductID 800 causes an index scan operation. We will generate an execution plan with an index seek operation and force that plan for the same type of queries so that for every ProductID an index seek is performed.
The following are the prerequisites for this recipe:
An instance of SQL Server 2012 Developer or Enterprise Evaluation...
Change the font size
Change margin width
Change background colour