Error
Error Code: ORA-29979

ORA-29979: Excessive Columns QRCN

📦 Oracle Database
📋

Description

The ORA-29979 error occurs in Oracle Database when attempting to register a query result change notification (QRCN) on a table that exceeds the maximum supported column limit. QRCN is limited to tables with 255 or fewer columns.
💬

Error Message

ORA-29979: unsupported row size for query result change notification
🔍

Known Causes

2 known causes
⚠️
Too Many Columns
The table being monitored by QRCN has more than 255 columns, exceeding the supported limit.
⚠️
Incorrect Notification Type
QRCN was mistakenly used instead of object change notification (OCN) for a large table.
🛠️

Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

Find Help

Stack Overflow Google Search Official Docs