Introduction to Oracle 19c Upgrade
Upgrading from Oracle 12c to 19c is a significant step for many organizations seeking improved performance and features. However, this transition comes with its own challenges, especially regarding deprecated features from previous versions. Understanding how to manage these changes effectively is crucial for a successful upgrade.
Key Deprecated Features in Oracle 19c
With the release of Oracle 19c, several features from 12c have been deprecated. This involves removing or recommending alternatives for certain functionalities, which can impact your existing applications. Being aware of these features is the first step in planning your upgrade.
Common Deprecated Features:
- Oracle Streams
- ENABLE_ROW_MOVEMENT clause
- USERENV function
- DBMS_JOBS package
- FLASHBACK DATABASE TO SCN
Replacements for Deprecated Features
Fortunately, Oracle 19c provides several appealing replacements and new functionality to help developers migrate smoothly. The key is to identify these alternatives and seamlessly adapt your applications without losing functionality or requiring a complete rewrite.
Replacement Features:
- Oracle GoldenGate for data replication instead of Oracle Streams
- Use DBMS_SCHEDULER for job scheduling instead of DBMS_JOBS
- Database Resource Manager over USERENV for performance management
- Native Flashback features for SCN recovery
Adapting Legacy Applications
Legacy applications often rely on deprecated features, and adapting these systems for Oracle 19c can be challenging. However, by updating your codebase and utilizing new features, you can ensure continued performance and scalability. Consider accessing support from experts when faced with complex migrations.
Steps to Adapt Your Applications:
- Conduct a full audit of your current application features.
- Identify all instances where deprecated features are used.
- Plan a phased migration strategy to replace or rewrite affected components.
- Test thoroughly to ensure functionality post-migration.
- Train your team on new features and best practices.
The Role of Experts in Your Upgrade Process
Navigating an upgrade to Oracle 19c can be intricate and unpredictable. Therefore, it’s advisable to hire Oracle experts who are well-versed in the latest technology updates. Their expertise can provide insights that will help ease the transition and ensure that your applications run smoothly in the new environment.
Conclusion and Next Steps
As you prepare to upgrade from Oracle 12c to 19c, it's crucial to understand the deprecated features and how they affect your existing applications. Replacing these features with suitable alternatives and adapting your codebase will lead to a more efficient and stable environment. If you need assistance, consider outsourcing your Oracle development work to experts like ProsperaSoft, who can provide tailored solutions for your upgrade needs.
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