When you create a materialized view, its definition is stored in the database. The database server validates the definition to make sure it compiles properly. All column and table references are fully qualified by the database server to ensure that all users with access to the view see an identical definition. After successfully creating a materialized view, you populate it with data, also known as initializing the view, using a REFRESH MATERIALIZED VIEW statement. See REFRESH MATERIALIZED VIEW statement.
Before creating, initializing, or refreshing materialized views, ensure that all materialized view restrictions have been met. See Restrictions on materialized views.
To obtain a list of all materialized views in the database, including their status, use the sa_materialized_view_info system procedure. See sa_materialized_view_info system procedure.
After you finish creating the definition for the materialized view, it appears in the Views folder in Sybase Central.
Use the SQL Anywhere 12 plug-in to connect to the database as a user with DBA or RESOURCE authority.
In the left pane, right-click Views and choose New » Materialized View.
Follow the instructions in the Create Materialized View Wizard.
Initialize the materialized view so that it contains data. See Initialize materialized views.
When you are done with this example, you should drop the materialized view you created. Otherwise, you will not be able to make schema changes to its underlying tables Employees and Departments, when trying out other examples. You cannot alter the schema of a table that has enabled, dependent materialized view. See Drop materialized views.
Connect to the database as a user with DBA or RESOURCE authority.
Execute a CREATE MATERIALIZED VIEW statement. The database server creates and stores the view definition in the database, and sets the view's status to ENABLED. See CREATE MATERIALIZED VIEW statement.
You must initialize the materialized view so that it contains data. See Initialize materialized views.
Discuter à propos de cette page dans DocCommentXchange.
|Copyright © 2010, iAnywhere Solutions, Inc. - SQL Anywhere 12.0.0|