mysql.procs_priv Table

The mysql.procs_priv table contains information about stored procedure and stored function privileges. See CREATE PROCEDURE and CREATE FUNCTION on creating these.

The INFORMATION_SCHEMA.ROUTINES table derives its contents from mysql.procs_priv.

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.procs_priv table contains the following fields:

Field	Type	Null	Key	Default	Description
`Host`	`char(60)`	NO	PRI		Host (together with `Db`, `User`, `Routine_name` and `Routine_type` makes up the unique identifier for this record).
`Db`	`char(64)`	NO	PRI		Database (together with `Host`, `User`, `Routine_name` and `Routine_type` makes up the unique identifier for this record).
`User`	`char(80)`	NO	PRI		User (together with `Host`, `Db`, `Routine_name` and `Routine_type` makes up the unique identifier for this record).
`Routine_name`	`char(64)`	NO	PRI		Routine_name (together with `Host`, `Db` `User` and `Routine_type` makes up the unique identifier for this record).
`Routine_type`	`enum('FUNCTION','PROCEDURE', 'PACKAGE', 'PACKAGE BODY')`	NO	PRI	`NULL`	Whether the routine is a stored procedure, stored function, or, from MariaDB 10.3.5, a package or package body.
`Grantor`	`char(141)`	NO	MUL
`Proc_priv`	`set('Execute','Alter Routine','Grant')`	NO			The routine privilege. See Function Privileges and Procedure Privileges for details.
`Timestamp`	`timestamp`	NO		`CURRENT_TIMESTAMP`

The Acl_function_grants status variable, added in MariaDB 10.1.4, indicates how many rows the mysql.columns_priv table contains with the FUNCTION routine type.

The Acl_procedure_grants status variable, added in MariaDB 10.1.4, indicates how many rows the mysql.columns_priv table contains with the PROCEDURE routine type.

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https://mariadb.com/kb/en/mysqlprocs_priv-table/