Error
Error Code:
3699
MySQL Error 3699: Regex Match Timeout Exceeded
Description
This error indicates that a regular expression operation within MySQL exceeded its allocated time limit. It typically occurs when a complex or inefficient regex pattern is applied to a large dataset, leading to excessive processing time and resource consumption before a match can be determined.
Error Message
Timeout exceeded in regular expression match.
Known Causes
4 known causesInefficient Regular Expression Pattern
The regex pattern used is overly complex or poorly optimized, leading to a high number of steps or excessive backtracking during the matching process.
Large Input Data Size
The string or dataset against which the regular expression is being matched is exceptionally large, requiring more time than allowed to complete the operation.
Catastrophic Backtracking
Specific regex patterns can cause 'catastrophic backtracking' on certain inputs, where the engine explores an exponential number of paths, consuming excessive time.
Insufficient Time Limit Configuration
The `regexp_time_limit` system variable is set too low, causing even reasonably complex regex operations to time out prematurely.
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