MySQL user and rights management
Permissions categories:
Library level
Table level
Field-level
Management
Classes
Management:
CREATE TEMPORARY TABLES
CREATE USER
FILE
SUPER
SHOW DATABASES
RELOAD
SHUTDOWN
REPLICATION SLAVE
REPLICATION CLIENT
LOCK TABLES
PROCESS
Classes:
FUNCTION
PROCEDURE
TRIGGER
CREATE，ALTER，DROP，EXCUTE
Library and table level: TABLE or DATABASE
ALTER
CREATE
CREATE VIEW
DROP
INDEX
SHOW VIEW
GRANT OPTION: able to obtain permission to own a copy of a gift by other users;
Data manipulation:
SELECT
INSERT
DELETE
UPDATE
Field-level:
SELECT (col1,col2,...)
UPDATE (col1,col2,...)
INSERT (col1,col2,...)
All: ALL PRIVILIEGES, ALL
Metadata database: mysql
Authorization Form:
db，host，user
columns_priv，tables_priv，procs_priv，proxies_priv
user account:
‘USERNAME'@'HOST'：
@’HOST'：
CPU name:
IP address or Network;
Tsuhaifu:
%，_：172.16.%.%
Create a user: CREATE USER
CREATE USER 'USERNAME'@'HOST' [IDENTIFIED BY 'password']
View authorized users get: SHOW GRANTS FOR
SHOW GRANTS FOR 'USERNAME'@'HOST'
Delete User: DROP USER 'USERNAME' @ 'HOST'
change Password:
(1) SET PASSWORD FOR
(2) UPDATE mysql.user SET password=PASSWORD('your_password') WHERE clause;
(3) mysqladmin password
mysqladmin [OPTIONS] command command...
-u，-h，-p
Forgotten administrator password solution:
When you start mysql process for its use: - skip-grant-tables --skip-networking
(2) using the UPDATE command to change the administrator password
(3) close Mysql process, the removal of the two options, restart Mysql;
Authorization: GRANT
GRANT priv_type[,...] ON [{table|function|procedure}] db.{table|routeine} TO 'USERNAME'@'HOST' [IDENTIFIED BY 'password']
[REQUIRE SSL] [WITH with_option]
with_option:
GRANT OPTION
| MAX_QUERIES_PER_HOUR count
| MAX_UPDATES_PER_HOUR count
| MAX_CONNECTIONS_PER_HOUR count
| MAX_USER_CONNECTIONS count
Deauthorize: REVOKE
REVOKE priv_type [(column_list)] [, priv_type [(column_list)]] ... ON [object_type] priv_level FROM user [, user] ...
Exercise: authorized users to connect the current test mysqld by any host, but shall not exceed the maximum number of queries per second, five times; while this account may not exceed three times the number of connections;
Query cache:
How to determine whether a hit:
Query by the hash value judgments: Factors to consider include the hash value
The query itself, to query the database, the client uses protocol version, ...
Different query on any character will cause the cache can not hit;