MySQL 如何连接对应的客户端进程

2020-05-19 15:31:04,976 - mysql-connector-python.mysql.connector.protocol.MySQLProtocol.make_auth - MainThread - INFO - conn-attrs {'_pid': '58471', '_platform': 'x86_64', '_source_host': 'NEEKYJIANG-MB1', '_client_name': 'mysql-connector-python', '_client_license': 'GPL-2.0', '_client_version': '8.0.20', '_os': 'macOS-10.15.3'}

4       capability flags, CLIENT_PROTOCOL_41 always set
4       max-packet size
1       character set
string[23]   reserved (all [0])
string[NUL]  username
 if capabilities & CLIENT_PLUGIN_AUTH_LENENC_CLIENT_DATA {
lenenc-int   length of auth-response
string[n]   auth-response
 } else if capabilities & CLIENT_SECURE_CONNECTION {
1       length of auth-response
string[n]   auth-response
 } else {
string[NUL]  auth-response
 }
 if capabilities & CLIENT_CONNECT_WITH_DB {
string[NUL]  database
 }
 if capabilities & CLIENT_PLUGIN_AUTH {
string[NUL]  auth plugin name
 }
 if capabilities & CLIENT_CONNECT_ATTRS {
lenenc-int   length of all key-values
lenenc-str   key
lenenc-str   value
  if-more data in 'length of all key-values', more keys and value pairs
 }

mysql> select * from information_schema.processlist;
+----+---------+--------------------+--------------------+---------+------+-----------+----------------------------------------------+
| ID | USER  | HOST        | DB         | COMMAND | TIME | STATE   | INFO                     |
+----+---------+--------------------+--------------------+---------+------+-----------+----------------------------------------------+
| 8 | root  | 127.0.0.1:57760  | performance_schema | Query  |  0 | executing | select * from information_schema.processlist |
| 7 | appuser | 172.16.192.1:50198 | NULL        | Sleep  | 2682 |      | NULL                     |
+----+---------+--------------------+--------------------+---------+------+-----------+----------------------------------------------+
2 rows in set (0.01 sec)

mysql> select * from session_connect_attrs where processlist_id = 7;               
+----------------+-----------------+------------------------+------------------+
| PROCESSLIST_ID | ATTR_NAME    | ATTR_VALUE       | ORDINAL_POSITION |
+----------------+-----------------+------------------------+------------------+
|       7 | _pid      | 58471         |        0 |
|       7 | _platform    | x86_64         |        1 |
|       7 | _source_host  | NEEKYJIANG-MB1     |        2 |
|       7 | _client_name  | mysql-connector-python |        3 |
|       7 | _client_license | GPL-2.0        |        4 |
|       7 | _client_version | 8.0.20         |        5 |
|       7 | _os       | macOS-10.15.3     |        6 |
+----------------+-----------------+------------------------+------------------+
7 rows in set (0.00 sec)

 ps -ef | grep 58471
 501 58471 57741  0 3:24下午 ttys001  0:03.67 /Library/Frameworks/Python.framework/Versions/3.8/Resources/Python.app/Contents/MacOS/Python /Library/Frameworks/Python.framework/Versions/3.8/bin/ipython