Integration: Relational Databases

Oracle

Overview

Omnidex can be deployed directly against an Oracle database. Omnidex retrieves and indexes the Oracle data, and queries read directly from the Oracle database as needed. This approach allows Omnidex to work alongside Oracle, providing a high-performance query environment for applications.

An Omnidex Environment File controls how Omnidex connects to the Oracle database and identifies the tables and columns that Omnidex will have access to. Omnidex accesses the Oracle data directly using standard SQL statements issued through the Oracle Call Interface (OCI). During indexing and query processing, Omnidex maintains a connection to the Oracle database and accesses the data as needed. Typically, queries are first routed to the Omnidex indexes where specific rowids or primary keys are identified that meet the criteria. Omnidex then fetches the appropriate rows using these values with standard SQL statements.

Omnidex does not migrate the data out of Oracle, but instead directly references the data in the Oracle database. This is not a requirement, though. Migration of the data into raw data files is an option if that is preferable; in fact, many companies use Omnidex Snapshots for this very purpose. Omnidex Snapshots are high-performing, highly-portable, heavily-indexed copies of data that can be easily accessed using standard ODBC and JDBC interfaces.

Omnidex is usually deployed on read-only tables. Most applications require tens to hundreds of Omnidex indexes on a table, making real-time updates impractical. Applications usually set aside certain Oracle tables that are refreshed on a regular basis and Omnidex indexes are completely refreshed. Omnidex does support real-time updates for those situations where there are fewer indexes and lower volume.

Additional Resources

See also:

 
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