Error
Error Code:
1192
MySQL Error 1192: Active Locks or Transactions
Description
This error indicates that MySQL cannot perform the requested operation because there are existing table locks or an ongoing transaction that conflict with the command. It typically occurs when trying to modify schema, perform DDL operations, or execute certain administrative commands while other sessions hold locks or are within a transaction.
Error Message
Can't execute the given command because you have active locked tables or an active transaction
Known Causes
4 known causesManual Table Locks
A previous `LOCK TABLES` statement in the current session has explicitly locked one or more tables, preventing other operations.
Active Transactions
The current session has an open transaction (e.g., started with `START TRANSACTION` or implicitly) that has not yet been committed or rolled back.
Implicit Locks from DDL
Certain DDL operations (e.g., `ALTER TABLE`, `DROP TABLE`) can implicitly acquire locks that conflict with the current command until the DDL completes.
Uncommitted Changes (Autocommit Off)
If `autocommit` is disabled, changes made within a session might implicitly hold locks until explicitly committed or rolled back.
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