This feature can send
notifications to a client whenever the data in a query result set has changed. Oracle
Database 11g enhances this feature enabling notification for individual row changes,
rather than just a single notification whenever any row in the result set changes.
As of Oracle Database 10g Release 2, Streams can be managed through Oracle
Enterprise Manager. A migration tool is available to aid migration from Advanced
Replication to Streams.
Streams and Grid Computing
Oracle Streams provides key functionality in grid computing implementations. By its
nature, grid computing can consist of widely distributed data, users, and platforms.
Streams enables the movement of data when and where it is needed, as well as message
sharing, notification or invocation of user procedures on events, message and
database change subscriptions, and interoperation with other platforms. Streaming
databases can offload processing to replica databases by creating operational data
stores, or can create replicas and apply changes from replicas or data transformations
to the production database.
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