Search Results ava overviewhomepending casesmy casesteam overviewteam settingsmy cases




The CTXSYS.DR$PENDING table is a critical component within Oracle Text, specifically designed to track pending indexing operations in Oracle E-Business Suite (EBS) environments, including versions 12.1.1 and 12.2.2. This table is part of the Oracle Text data dictionary and is owned by the CTXSYS schema, which manages full-text indexing and search capabilities. Below is a detailed analysis of its role, structure, and implications in Oracle EBS.

1. Purpose and Functionality

The DR$PENDING table records rows that require indexing or re-indexing due to data modifications (inserts, updates, or deletes) in tables with Oracle Text indexes. When a transaction affects a text-indexed column, Oracle Text marks the affected rows as "pending" in this table, ensuring asynchronous index synchronization. This mechanism optimizes performance by deferring resource-intensive indexing operations until a scheduled sync or manual refresh.

2. Key Columns and Structure

The table's structure typically includes:
  • PND_CID: Identifies the pending operation's context (index ID).
  • PND_PID: Partition ID (for partitioned indexes).
  • PND_ROWID: RowID of the modified record in the base table.
  • PND_TIMESTAMP: Timestamp of the pending operation.
  • PND_STATUS: Status flag (e.g., 'PENDING' or 'PROCESSED').
This metadata enables Oracle Text to efficiently process pending rows during index synchronization.

3. Integration with Oracle EBS

In EBS 12.1.1/12.2.2, Oracle Text indexes are often used for:
  • Advanced search functionality in modules like iProcurement, iSupplier, and CRM.
  • Document management systems (e.g., XML/PDF content indexing).
The DR$PENDING table ensures search results remain consistent with underlying data, even during high-volume transactions. For example, when a purchase order is updated, its text-indexed attributes (e.g., item descriptions) are queued for re-indexing via this table.

4. Performance and Maintenance Considerations

  • Index Sync Frequency: The CTX_DDL.SYNC_INDEX procedure processes pending rows. In EBS, this is often scheduled via concurrent programs or DBMS jobs.
  • Monitoring: Queries against DR$PENDING help identify indexing backlogs. Excessive pending rows may indicate inadequate sync intervals.
  • Partitioning: In large EBS deployments, partitioned text indexes leverage PND_PID to streamline sync operations.

5. Troubleshooting

Common issues include:
  • Stale Pending Rows: Orphaned entries may require manual cleanup using CTX_DDL.PURGE_PENDING.
  • Performance Bottlenecks: High DR$PENDING volume can degrade search performance; tuning sync frequency is critical.

6. Best Practices for EBS

  • Schedule regular index syncs during off-peak hours.
  • Monitor table growth via SELECT COUNT(*) FROM CTXSYS.DR$PENDING.
  • Consider NOLOGGING options for large indexes to reduce redo overhead.

Conclusion

The CTXSYS.DR$PENDING table is a foundational element for maintaining text index integrity in Oracle EBS. Its efficient management ensures optimal search functionality while minimizing transactional overhead. Administrators must balance sync frequency with system load, particularly in high-transaction environments like EBS 12.1.1/12.2.2, to maintain performance and data consistency.