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The OLAPSYS.CWM$MODEL table is a critical metadata repository within Oracle's OLAP (Online Analytical Processing) system, particularly in Oracle E-Business Suite (EBS) environments running versions 12.1.1 or 12.2.2. This table is part of the OLAP Catalog, which provides a bridge between relational data structures and multidimensional OLAP objects, enabling advanced analytics and reporting capabilities in Oracle EBS.

Purpose and Functionality

CWM$MODEL serves as the central metadata table for OLAP models in Oracle EBS. It stores high-level definitions of OLAP dimensional models that map to underlying relational tables. This enables multidimensional analysis of EBS data (such as financial, inventory, or supply chain information) while maintaining the integrity of transactional systems.

Key Columns and Structure

The table contains several important columns:
  • MODEL_ID: Primary key identifier for each OLAP model
  • MODEL_NAME: Logical name of the OLAP model
  • DESCRIPTION: Textual description of the model's purpose
  • CREATION_DATE and LAST_UPDATE_DATE: Audit columns tracking metadata changes
  • STATUS: Indicates whether the model is active or inactive

Integration with Oracle EBS

In EBS 12.1.1 and 12.2.2, this table works with other OLAP Catalog tables (CWM$DIMENSION, CWM$CUBE, etc.) to:
  • Enable multidimensional analysis of EBS data through Oracle BI tools
  • Support Oracle Discoverer OLAP connections
  • Facilitate the creation of materialized views for performance optimization
  • Provide metadata for Oracle's Analytic Workspace Manager

Implementation Considerations

When working with CWM$MODEL in EBS environments:
  • Modifications should be done through Oracle's OLAP API rather than direct DML
  • Model definitions often map to EBS base tables like GL_JE_HEADERS or MTL_SYSTEM_ITEMS_B
  • Oracle recommends using the OLAP Analytic Workspace for complex calculations
  • Proper indexing is crucial for performance in large EBS implementations

Security Aspects

Access to OLAPSYS.CWM$MODEL is typically restricted to:
  • OLAP administrators through the OLAPSYS schema
  • EBS system administrators with appropriate privileges
  • BI developers creating analytical solutions

Maintenance Best Practices

For optimal performance in EBS environments:
  • Regularly analyze table statistics using DBMS_STATS
  • Consider partitioning for implementations with numerous OLAP models
  • Document all custom models in the DESCRIPTION field
  • Monitor growth patterns to anticipate storage needs

Impact on EBS Performance

While CWM$MODEL itself is relatively small, its proper configuration significantly affects:
  • Query performance for OLAP-based EBS reports
  • Refresh times for materialized views
  • Metadata loading times for BI tools
This table represents a foundational element in Oracle's strategy to combine transactional processing (EBS) with analytical capabilities (OLAP), providing organizations with a comprehensive enterprise information management solution.