Error
Error Code: ORA-29911

ORA-29911: Null Scan Context

📦 Oracle Database
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Description

The ORA-29911 error indicates that the ODCIIndexStart() routine, used in extensibility features of Oracle Database, returned a null scan context. This typically occurs when a custom index type implementation has an issue during index scan initialization.
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Error Message

null scan context returned by ODCIIndexStart() routine
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Known Causes

3 known causes
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Faulty ODCI Implementation
The ODCIIndexStart() function in your custom index type implementation is not correctly allocating or initializing the scan context, resulting in a null pointer being returned.
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Memory Allocation Failure
The memory allocation within the ODCIIndexStart() function fails, leading to the function returning a null pointer as the scan context.
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Incorrect Context Handling
The scan context pointer is inadvertently set to NULL within the ODCIIndexStart() routine due to a logical error in the implementation.
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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

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