mysql.db Table

The mysql.db table contains information about database-level privileges. The table can be queried and although it is possible to directly update it, it is best to use GRANT for setting privileges.

Note that the MariaDB privileges occur at many levels. A user may not be granted a privilege at the database level, but may still have permission on a table level, for example. See privileges for a more complete view of the MariaDB privilege system.

MariaDB starting with 10.4

In MariaDB 10.4 and later, this table uses the Aria storage engine.

MariaDB until 10.3

In MariaDB 10.3 and before, this table uses the MyISAM storage engine.

The mysql.db table contains the following fields:

FieldTypeNullKeyDefaultDescriptionIntroduced
Hostchar(60)NOPRIHost (together with User and Db makes up the unique identifier for this record. Until MariaDB 5.5, if the host field was blank, the corresponding record in the mysql.host table would be examined. From MariaDB 10.0, a blank host field is the same as the % wildcard.
Dbchar(64)NOPRIDatabase (together with User and Host makes up the unique identifier for this record.
Userchar(80)NOPRIUser (together with Host and Db makes up the unique identifier for this record.
Select_privenum('N','Y')NONCan perform SELECT statements.
Insert_privenum('N','Y')NONCan perform INSERT statements.
Update_privenum('N','Y')NONCan perform UPDATE statements.
Delete_privenum('N','Y')NONCan perform DELETE statements.
Create_privenum('N','Y')NONCan CREATE TABLE's.
Drop_privenum('N','Y')NONCan DROP DATABASE's or DROP TABLE's.
Grant_privenum('N','Y')NONUser can grant privileges they possess.
References_privenum('N','Y')NONUnused
Index_privenum('N','Y')NONCan create an index on a table using the CREATE INDEX statement. Without the INDEX privilege, user can still create indexes when creating a table using the CREATE TABLE statement if the user has have the CREATE privilege, and user can create indexes using the ALTER TABLE statement if they have the ALTER privilege.
Alter_privenum('N','Y')NONCan perform ALTER TABLE statements.
Create_tmp_table_privenum('N','Y')NONCan create temporary tables with the CREATE TEMPORARY TABLE statement.
Lock_tables_privenum('N','Y')NONAcquire explicit locks using the LOCK TABLES statement; user also needs to have the SELECT privilege on a table in order to lock it.
Create_view_privenum('N','Y')NONCan create a view using the CREATE_VIEW statement.
Show_view_privenum('N','Y')NONCan show the CREATE VIEW statement to create a view using the SHOW CREATE VIEW statement.
Create_routine_privenum('N','Y')NONCan create stored programs using the CREATE PROCEDURE and CREATE FUNCTION statements.
Alter_routine_privenum('N','Y')NONCan change the characteristics of a stored function using the ALTER FUNCTION statement.
Execute_privenum('N','Y')NONCan execute stored procedure or functions.
Event_privenum('N','Y')NONCreate, drop and alter events.
Trigger_privenum('N','Y')NONCan execute triggers associated with tables the user updates, execute the CREATE TRIGGER and DROP TRIGGER statements.
Delete_history_privenum('N','Y')NONCan delete rows created through system versioning.MariaDB 10.3.5

The Acl_database_grants status variable, added in MariaDB 10.1.4, indicates how many rows the mysql.db table contains.

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