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List logged-in MySQL users?
To list logged-in MySQL users, you can use any of the following two methods −
First Method
Use INFORMATION_SCHEMA.PROCESSLIST
select *from INFORMATION_SCHEMA.PROCESSLIST;
Second Method
You can use SHOW PROCESSLIST command as well. Following is the syntax −
SHOW PROCESSLIST;
Let us implement the above syntaxes in order to list logged in MySQL users −
mysql> select *from information_schema.processlist;
This will produce the following output -
+----+-----------------+-----------------+------+---------+--------+-----------------------------+---------------------------------------------+ | ID | USER | HOST | DB | COMMAND | TIME | STATE | INFO | +----+-----------------+-----------------+------+---------+--------+-----------------------------+---------------------------------------------+ | 8 | root | localhost:50252 | web | Query | 0 | executing | select *from information_schema.processlist | | 4 | event_scheduler | localhost | NULL | Daemon | 301832 | Waiting for next activation | NULL | +----+-----------------+-----------------+------+---------+--------+-----------------------------+---------------------------------------------+ 2 rows in set (0.00 sec)
Now, let us see the second query −
mysql> show processlist;
This will produce the following output -
+----+-----------------+-----------------+------+---------+--------+-----------------------------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +----+-----------------+-----------------+------+---------+--------+-----------------------------+------------------+ | 4 | event_scheduler | localhost | NULL | Daemon | 301842 | Waiting for next activation | NULL | | 8 | root | localhost:50252 | web | Query | 1 | starting | show processlist | +----+-----------------+-----------------+------+---------+--------+-----------------------------+------------------+ 2 rows in set (0.19 sec)
Updated on: 03-Sep-2019
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