Error
Error Code:
42P08
PostgreSQL Error 42P08: Ambiguous Parameter in Query
Description
This error indicates that PostgreSQL cannot uniquely determine the intended data type or function overload for a parameter in your SQL query. It typically occurs when an expression or value could match multiple function signatures or operator definitions, leading to ambiguity for the parser.
Error Message
ambiguous parameter
Known Causes
4 known causesOverloaded Function/Operator Ambiguity
Occurs when a function or operator is called with arguments that could match multiple defined overloads, preventing PostgreSQL from uniquely selecting one based on argument types.
Missing or Implicit Type Casts
The database cannot implicitly determine the precise data type of a parameter, leading to ambiguity when matching against function signatures or operator expectations.
Conflicting Functions in Search Path
Multiple functions with identical names exist across different schemas within the current `search_path`, causing confusion for the parser when a function is not fully qualified.
Mismatched Function Arguments
The types or number of arguments provided to a function do not uniquely correspond to any single, unambiguous defined function signature.
Solutions
Coming SoonDetailed 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