mysql.columns_priv Table

The mysql.columns_priv table records column-level privileges granted to users, detailing specific access rights for individual columns.

The mysql.columns_priv table contains information about column-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 be granted a privilege at the column level, but may still not have permission on a table level, for example. See privileges for a more complete view of the MariaDB privilege system.

The INFORMATION_SCHEMA.COLUMN_PRIVILEGES table derives its contents from mysql.columns_priv.

This table uses the Aria storage engine.

The mysql.columns_priv table contains the following fields:

Field	Type	Null	Key	Default	Description
Host	char(60)	NO	PRI		Host (together with User, Db , Table_name andColumn_name makes up the unique identifier for this record.
Db	char(64)	NO	PRI		Database name (together with User, Host , Table_name andColumn_name makes up the unique identifier for this record.
User	char(80)	NO	PRI		User (together with Host, Db , Table_name andColumn_name makes up the unique identifier for this record.
Table_name	char(64)	NO	PRI		Table name (together with User, Db , Host andColumn_name makes up the unique identifier for this record.
Column_name	char(64)	NO	PRI		Column name (together with User, Db , Table_name andHost makes up the unique identifier for this record.
Timestamp	timestamp	NO		CURRENT_TIMESTAMP
Column_priv	set('Select', 'Insert', 'Update', 'References')	NO			The privilege type. See Column Privileges for details.

The Acl_column_grants status variable indicates how many rows the mysql.columns_priv table contains.

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