Error
Error Code: ORA-28527

Oracle ORA-28527: Datatype Mapping Failure

📦 Oracle Database
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Description

The ORA-28527 error indicates a problem with datatype mapping during heterogeneous database access. This occurs when Oracle cannot translate a datatype to or from a non-Oracle system via Heterogeneous Services (HS).
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Error Message

ORA-28527: Heterogeneous Services datatype mapping error
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Known Causes

3 known causes
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Missing Capability Definitions
The Oracle data dictionary lacks the necessary datatype mappings for the specified foreign data store (FDS). This prevents proper data conversion during queries.
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Incorrect Data Dictionary Content
The data dictionary contains corrupted or outdated datatype mappings for the connected FDS_CLASS_NAME and FDS_INST_NAME. This leads to incorrect datatype conversions.
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Unsupported Datatype
The non-Oracle database contains a datatype that is not supported by the Oracle Heterogeneous Services agent. This results in a mapping failure.
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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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