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How are indexes created in an indexed view?
The Database Engine allows you to create indices on views. Such views are called indexed or materialized views. When a unique clustered index is created on a view, the view is executed and the result set is stored in the database in the same way a table with a clustered index is stored.
How does a clustered index on a view work?
When a unique clustered index is created on a view, the view is executed and the result set is stored in the database in the same way a table with a clustered index is stored. This means that the leaf nodes of the clustered index’s B+- tree contain data pages.
How to prevent the database engine from using indexed views?
Indexed views can be created on a partitioned table, and can themselves be partitioned. To prevent the Database Engine from using indexed views, include the OPTION (EXPAND VIEWS) hint on the query. Also, if any of the listed options are incorrectly set, this will prevent the optimizer from using the indexes on the views.
What happens when clustered index on table is disabled?
When a clustered index on a table is disabled, indexes on views associated with the table are also disabled. Expressions that involve implicit conversion of character strings to datetime or smalldatetime are considered nondeterministic. For more information, see Nondeterministic conversion of literal date strings into DATE values.
Creating a unique clustered index on a view improves query performance because the view is stored in the database in the same way a table with a clustered index is stored. The view is transformed from a proper view into a table. The view definition is used to update this table.
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