MySQL 1184: Cannot use SAVEPOINT in transaction.

When encountering the error "1184: Cannot use SAVEPOINT in a transaction" in MySQL, you should immediately take the following actions:

  1. Identify the Current Transaction State:


- Run `SHOW ENGINE INNODB STATUS;` to check the latest transactions and their states. This can help identify if there are nested transactions or any anomalies in transaction handling.

  1. Check Active Transactions:


- Execute `SELECT * FROM informationschema.innodbtrx;` to see all current InnoDB transactions. This will help you understand if your SAVEPOINT is being issued in an unexpected transaction context.

  1. Review the Code or Query Causing the Error:


- Locate the specific part of your application code or script that is attempting to create a SAVEPOINT. Ensure it's not nested within another transaction in a way that MySQL does not support.

  1. Manual Rollback If Needed:


- If you find the transaction should not proceed, consider manually rolling back to release locks and resources. Use `ROLLBACK;` to undo the transaction, or `ROLLBACK TO SAVEPOINT savepoint_name;` if you're attempting to rollback to a specific savepoint (assuming the savepoint was successfully set before the error occurred).

  1. Check MySQL Documentation for SAVEPOINT Limitations:


- Quickly review the MySQL documentation relevant to your version to ensure there's no misunderstood usage of SAVEPOINT that's causing the issue.

  1. Monitor Database Performance Metrics:


- If possible, check the database's performance metrics for any signs of locking or resource contention issues that might be affecting transactions.

  1. Examine Application Logs:


- Look into the application logs for any preceding errors or warnings that might have contributed to this error, focusing on transaction handling.

These actions are aimed at diagnosing and potentially resolving the immediate issue with SAVEPOINT in your MySQL database transactions.

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MySQL 1239: Partition needs repair.
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MySQL 1238: Cannot repair partition.
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MySQL 1220: Cannot update parent row.
MySQL 1219: Cannot update child row.
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MySQL 1218: Cannot delete child row.
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MySQL 1217: Cannot add child row.
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MySQL 1213: Deadlock found when trying to get lock.
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MySQL 1200: Index is corrupted.
MySQL 1201: Duplicate key value.
MySQL 1198: Error closing file.
MySQL 1193: Statement failed due to table.
MySQL 1197: Failed to open file.
MySQL 1175: Statement not allowed in schema.
MySQL 1196: Too many connections.
MySQL 1194: Table needs repair.
MySQL 1195: Table is corrupted.
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