Error
Error Code:
3986
MySQL Error 3986: Implicit JSON Boolean Comparison
Description
This error occurs when a JSON value is evaluated within a SQL boolean context, such as a WHERE clause or an IF statement. MySQL implicitly compares the JSON value against the JSON integer 0. This behavior can lead to unintended logical outcomes or incorrect query results if explicit type conversion is not performed.
Error Message
Evaluating a JSON value in SQL boolean context does an implicit comparison against JSON integer 0; if this is not what you want, consider converting JSON to a SQL numeric type with JSON_VALUE RETURNING
Known Causes
3 known causesDirect JSON in Boolean Context
Using a JSON path expression directly within a `WHERE` clause or `IF` statement without explicitly converting its type.
Unintended Comparison Logic
Relying on MySQL's default implicit comparison of a JSON value against `0` when a different logical evaluation or comparison was intended.
Mixing JSON and SQL Types
Failing to explicitly cast JSON values to standard SQL numeric, string, or boolean types before using them in conditional or logical operations.
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