ClickHouse is a fast open-source column-oriented database management system that allows generating analytical data reports in real-time. It is designed to process analytical queries with high performance and efficiency. ClickHouse is widely used for online analytical processing (OLAP) and is known for its ability to handle large volumes of data.
When working with ClickHouse, you might encounter the following error message: DB::Exception: Code: 1029, e.displayText() = DB::Exception: Cannot drop user. This error indicates an issue when attempting to drop a user from the ClickHouse system.
The error code 1029 in ClickHouse signifies a failure in executing the DROP USER command. This typically occurs when the system is unable to remove the specified user due to certain constraints or conditions.
There are several reasons why this error might occur:
Ensure that you have the necessary permissions to drop the user. You can verify your permissions by executing:
SHOW GRANTS FOR CURRENT_USER;
If you lack the required permissions, contact your database administrator to grant the necessary privileges.
Verify that no active processes are using the user account you wish to drop. You can check for active sessions using:
SELECT * FROM system.processes WHERE user = 'username';
If there are active processes, wait for them to complete or terminate them if appropriate.
Once you have confirmed permissions and ensured no active processes, attempt to drop the user again:
DROP USER username;
Replace username with the actual username you wish to drop.
For more information on managing users in ClickHouse, refer to the official ClickHouse Access Rights Documentation. If you encounter further issues, consider visiting the ClickHouse Support Page for additional help.
Let Dr. Droid create custom investigation plans for your infrastructure.
Start Free POC (15-min setup) →
