![]() Run the following command: mysql> SELECT GROUP_CONCAT(CONCAT('KILL ',id,' ') SEPARATOR ' ')įROM information_schema.processlist WHERE user 'system user' There are multiple ways you can do this: Method 1: Since MySQL does not have a massive kill command, you can use “ concat” to produce kill commands from the Process list table. Now, use the following: SELECT CONCAT('KILL ',id,' ') AS kill_list FROM information_schema.processlist WHERE user='root' AND info = 'SELECT * FROM processlist' You can create a table from process list. This will give an output that will look similar to this: +-+ Now you can use either of the following ways to kill all the threads: 1. Run the following command: SELECT CONCAT('KILL ',id,' ') AS run_this FROM information_schema.processlist WHERE user='root'ĪND info = 'SELECT * FROM processlist' INTO OUTFILE '/tmp/kill_list.txt' By using a command to create an output file By manually editing the text:Ĭopy this output in a text file and remove pipes, plus, and dashes. This will create a text file with the name “kill_list”. You just need to remove the first line from the text file (kill_list) as it is not a valid MySQL command. It will execute all the statements in the file which will kill all the threads. Using Stored Procedure To Exempt Current Processes You can also import this file to kill multiple MySQL queries at once: mysql -uroot -p 6. DROP PROCEDURE IF EXISTS kill_other_processes ĭECLARE proc_id_cursor CURSOR FOR SELECT idĭECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = 1 You can create a stored procedure to kill all processes one by one without killing the processes currently being used. Stored Procedure To Kill Processes of A Particular User You can call it using: CALL kill_other_processes() 7. SELECT CONCAT('KILL ',id,' ') FROM information_schema.processlist WHERE USER=user_to_kill DROP PROCEDURE IF EXISTS kill_user_processes$$ You can create a stored procedure that can kill all the processes of a particular user. You can call the procedure by mentioning the username of the database users whose processes you want to kill. Suppose the user is ‘bob’ you can use: CALL kill_user_processes('bob') So you can kill MySQL queries, processes, or threads by running these commands. You may have noticed how the “ show processlist” command is useful in identifying the methods that got to be killed. If you have a new approach, please join the discussion in the comments.How to change the definer of a Stored Procedure? As there is no single command in MySQL to kill all the processes, we have to settle with a workaround. The definer of a Stored Procedure cannot be directly altered. To change it, you will need to recreate the procedure with the desired definer.īelow are the recommended steps to change the definer of a Stored Procedure.ġ. Get the Stored Procedure CREATE statement using the command: SHOW CREATE PROCEDURE Ģ. ![]() While connected to the database as the desired user (new definer) that is expected to own these procedures, execute the existing Stored Procedure's CREATE statement CREATE OR REPLACE PROCEDURE this step will recreate and replace the existing Stored Procedure with new definer.ģ. Verify the definer change using the SHOW PROCEDURES or SHOW PROCEDURE STATUS command. Note: Make sure the desired database user has sufficient privilege to be the new definer. Click here to learn about the Grants required for creating a Stored Procedure. Here we have a procedure thisworks with definer adminand we have a user named db_user. Now we are going to change the definer to db_user.
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