Error
Error Code:
4000
MariaDB Error 4000: Invalid Multi-Statement Result Context
Description
Error 4000, 'COM_MULTI can't return a result set in the given context', indicates that a multi-statement command or a stored procedure attempted to return a result set in a scenario where the server or client protocol does not expect one. This typically occurs when a database operation designed for non-result-producing actions (like DML) unexpectedly generates a result set, causing a protocol mismatch.
Error Message
COM_MULTI can't return a result set in the given context
Known Causes
3 known causesStored Procedure Unexpected Output
A stored procedure, executed in a context not designed to receive result sets (e.g., within an `INSERT` or `UPDATE` statement), unexpectedly includes a `SELECT` statement that produces a result set.
Misconfigured Multi-Statement Execution
Using `COM_MULTI` (MariaDB's protocol command for multi-statement execution) with a sequence of commands where one or more statements generate result sets that are not expected by the client or the database's current operational mode.
Client Driver Expectation Mismatch
The client application or its database driver is configured to expect a specific type of response (e.g., only affected rows count), but the executed SQL command, especially in a multi-statement context, returns an unexpected result set.
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