Error
Error Code:
39004
PostgreSQL Error 39004: Null Value Not Allowed
Description
This error, an 'External Routine Invocation Exception,' indicates that a called external routine (like a stored procedure or function) encountered or attempted to process a `NULL` value in a context where `NULL` is explicitly forbidden. This typically occurs when a `NOT NULL` constraint is violated, either on a function's return type, an input argument, or during an internal data manipulation operation within the routine.
Error Message
null value not allowed
Known Causes
3 known causesFunction Return Type Disallows NULL
The external routine attempted to return a `NULL` value, but its declared return type or an implicit constraint on the return value does not permit `NULL`s.
NULL Argument Passed to Routine
The external routine was invoked with a `NULL` value for an argument that has a `NOT NULL` constraint or is expected to be non-NULL by the routine's logic.
Internal Data Operation Violates NOT NULL
An operation within the external routine attempted to insert or update data with a `NULL` value into a column defined with a `NOT NULL` constraint.
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