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The CLN_Tables.html file in Oracle E-Business Suite (EBS) 12.1.1 or 12.2.2 is a critical document that provides a structured overview of the Cleanup (CLN) tables used within the system. These tables are primarily designed to store temporary or historical data that requires periodic maintenance to ensure optimal database performance and compliance with data retention policies. The file serves as a reference for database administrators, developers, and functional consultants who need to manage or troubleshoot data cleanup processes in Oracle EBS.

Purpose and Scope

The CLN_Tables.html file typically contains metadata about cleanup tables, including their names, descriptions, associated modules, and the frequency at which they should be purged or archived. These tables are often used in conjunction with Oracle's Concurrent Processing framework, where temporary data is generated during batch jobs, reports, or interface processes. The document helps identify which tables are candidates for cleanup, reducing storage overhead and improving system performance.

Key Components

The file may include the following sections:
  1. Table Listing: A comprehensive list of cleanup tables, often categorized by module (e.g., GL, AP, AR, PO, INV). Each entry includes the table name, schema owner (e.g., APPS), and a brief description of its purpose.
  2. Cleanup Frequency: Recommendations for how often data should be purged from each table, such as daily, weekly, or monthly. This is critical for maintaining system efficiency.
  3. Dependencies: Information about related tables, indexes, or programs that might be affected by cleanup operations.
  4. Retention Policies: Guidelines on how long data should be retained before being purged, which may align with organizational or regulatory requirements.
  5. Script References: Links to SQL scripts or Concurrent Programs (e.g., FNDCPPUR) that automate the cleanup process.

Technical Context

In Oracle EBS 12.1.1 and 12.2.2, cleanup tables are often prefixed with CLN_ or TMP_ to denote their transient nature. Examples include:
  • CLN_INV_TEMP_DATA – Stores temporary inventory transaction data.
  • CLN_AP_INTERFACE_HOLD – Holds incomplete AP invoice records during interface processing.
  • CLN_GL_DAILY_BALANCES – Contains interim ledger balances before final posting.
These tables are typically managed by Oracle's standard cleanup utilities, such as Purge Concurrent Request and/or Manager Data (FNDCPPUR) or module-specific purge programs.

Best Practices

When using CLN_Tables.html as a reference, adhere to the following best practices:
  1. Schedule Regular Cleanups: Automate purges during off-peak hours to minimize performance impact.
  2. Validate Backups: Ensure critical data is archived before deletion.
  3. Monitor Growth: Track table sizes to identify unexpected data accumulation.
  4. Test in Non-Production: Verify cleanup scripts in a test environment before deploying to production.

Conclusion

The CLN_Tables.html file is an essential resource for maintaining Oracle EBS environments, ensuring that temporary data does not degrade system performance. By following the documented guidelines, administrators can streamline database operations, reduce storage costs, and maintain compliance with data governance policies. Proper utilization of this document contributes to the long-term stability and efficiency of Oracle EBS 12.1.1 and 12.2.2 implementations.