This tab has the following components:
Name Shows the name of the materialized view.
Type Shows the type of view.
Owner Shows the database user who owns the view.
Dbspace Shows the database file (or dbspace) where the view is located.
Status Shows the status of the view. If the status is Enabled, the view is available for use by the database server. This status is synonymous with the ENABLED clause in the ALTER MATERIALIZED VIEW statement. If the status is Disabled, the view has been explicitly disabled by the user.
Recompile and Enable Now Click this button to recompile and enable the view, making it available for use. Afterward, click Refresh Now to refresh the view, and then rebuild the indexes. If necessary, change the view back to an immediate view. See Enabling or disabling a materialized view.
Disable Now Click this button to disable the view. When you disable a materialized view, the data and indexes for the view are dropped. Also, when you disable an immediate view, it is changed to a manual view. The database server keeps the definition of the materialized view in the database.
Regular views that are dependent on a materialized view are automatically disabled by the database server if the view is disabled. See Enabling or disabling a materialized view.
Used in optimization Select this option to indicate whether the materialized view can be used by the optimizer. The optimizer ignores disabled views. If you disable the view, the Used In Optimization option remains selected, so that when you re-enable the view, its setting is remembered. See Tip: Use materialized views to improve query performance.
Initialized Shows whether the view is initialized. You must initialize a materialized view to make it available for use by the database server. To initialize the view, click Refresh Now.
Refresh type Specifies whether the view is a manual view or an immediate view. The default is Manual.
Manual You must refresh this view manually. Data in manual views can become stale because manual views are not refreshed until a refresh is explicitly requested. See Whether to set refresh type to manual or immediate.
Select this option to convert an immediate view to a manual view.
Immediate The database server automatically refreshes this view immediately after changes to underlying data impact data in the view. When you disable an immediate view, it is changed to a manual view. When you re-enable it, you must change it back to an immediate view. See Whether to set refresh type to manual or immediate.
To change a manual view to an immediate view, see Advanced: Changing the refresh type for a materialized view.
Immediate Compatible Specifies whether the view is compatible with an immediate view. If immediate view is not compatible, clicking Details explains the reason.
Last refresh time Shows the date and time that the view was last refreshed.
Known stale time Shows the time at which the view became known as stale. This property only applies to manual views and corresponds to the time that a change was made to an underlying base table.
Comment Provides a place for you to type a description of the view. For example, you could use this area to describe the view's purpose in the system. If you use the Database Documentation Wizard to document your SQL Anywhere database, you can include these comments in the output. See Documenting a database.
Discuss this page in DocCommentXchange.
|Copyright © 2014, SAP AG or an SAP affiliate company. - SAP Sybase SQL Anywhere 16.0|