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Immediate Maintenance of Materialized Views - Google Books

Immediate Maintenance of Materialized Views - Google Books 2025

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The document US 20100161555A1 describes a system, method, and computer program for the immediate maintenance of materialized views in relational database management systems. It outlines a process for creating a materialized view over a base table, executing updates on that base table, computing deltas to reflect changes, and updating the materialized view accordingly. The invention aims to provide efficient incremental updates to materialized views, ensuring they accurately represent the current state of underlying data without the need for costly recomputation.

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Can we automate refresh of materialized views?

There are two ways to refresh a materialized view: a manual refresh and an automatic refresh (called autorefreshing).

How often to refresh materialized views?

Materialized views can be refreshed either on demand or at regular time intervals. Alternatively, materialized views in the same database as their base tables can be refreshed whenever a transaction commits its changes to the base tables.

What are the problems associated with keeping views materialized?

Materialized views are not ideal for real-time data applications. They store data snapshots at specific intervals, which means they do not reflect the most current information. This delay can pose challenges for applications that require up-to-the-minute data accuracy.

How to maintain materialized view?

Maintaining Materialized Views Complete Refresh: Recomputes the entire view. Suitable for small datasets or when data changes significantly. Incremental Refresh: Updates only the changed data. This method reduces overhead and is ideal for large datasets.

What is a characteristic of the maintenance of a materialized view?

The following are key characteristics of materialized views: Zero maintenance. Materialized views are precomputed in the background when the base tables change. Any incremental data changes from the base tables are automatically added to the materialized views, with no user action required.

Do materialized views need to be refreshed?

A materialized view contains a snapshot of the query result. Materialized views are not updated periodically, unless you configure Amazon Redshift to make periodic updates. To manually refresh and update the data in a materialized view, you can use the REFRESH MATERIALIZED VIEW statement at any time.

Immediate Maintenance of Materialized Views - Google Books 2025

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