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Applying and Extending Oracle Spatial

You're reading from  Applying and Extending Oracle Spatial

Product type Book
Published in Sep 2013
Publisher Packt
ISBN-13 9781849686365
Pages 568 pages
Edition 1st Edition
Languages
Concepts

Table of Contents (20) Chapters

Applying and Extending Oracle Spatial
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Defining a Data Model for Spatial Data Storage 2. Importing and Exporting Spatial Data 3. Using Database Features in Spatial Applications 4. Replicating Geometries 5. Partitioning of Data Using Spatial Keys 6. Implementing New Functions 7. Editing, Transforming, and Constructing Geometries 8. Using and Imitating Linear Referencing Functions 9. Raster Analysis with GeoRaster 10. Integrating Java Technologies with Oracle Spatial 11. SQL/MM – A Basis for Cross-platform, Inter-operable, and Reusable SQL Table Comparing Simple Feature Access/SQL and SQL/MM–Spatial
Use of TREAT and IS OF TYPE with ST_GEOMETRY Index

Streams based replication

Oracle provides two basic technologies for general replication between two or more Oracle databases, namely, advanced replication and streams based replication. The streams based replication provides a more efficient solution than the one based on advanced replication. Rather than synchronously capturing changes in the materialized view logs, which adds overhead to the transaction, streams mine the redo logs created by the updates to the database and create change logs to send to the target database system. This architecture also allows the change to be replicated to more than one system much more quickly. The advanced replication also has some restrictions with SDO_GEOMETRY types that are harder to work around.

In this section, we will describe the streams based replication for the tables with SDO_GEOMETRY columns. Note that even the native streams based replication has restrictions for the tables with SDO_GEOMETRY columns. But procedures can be easily implemented...

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