About Siebel Additive Schema Changes Mode

Environments: Test, production.

Apply Additive Schema Changes mode is part of the Database Configuration Utilities. The purpose of Additive Schema Changes is to reduce the downtime required for the production database upgrade.

Additive Schema Changes generates an SQL script. You run the script on the live production database before you take it offline to perform the production upgrep. The script performs certain upgrade steps that are normally part of the production upgrep. This reduces the number of steps the upgrep must perform while the database is offline, and thus reduces database downtime.

Running the SQL script is optional. If you do not run it, then the regular production upgrep performs the steps in the SQL script.