SET @global=@@global.extra_max_connections;
#
# MDEV-21961 Bind CONNECTION ADMIN to a number of global system variables
#
# Test that "SET extra_max_connections" is not allowed without CONNECTION ADMIN
CREATE USER user1@localhost;
GRANT ALL PRIVILEGES ON *.* TO user1@localhost;
REVOKE CONNECTION ADMIN ON *.* FROM user1@localhost;
connect user1,localhost,user1,,;
connection user1;
SET GLOBAL extra_max_connections=10;
ERROR 42000: Access denied; you need (at least one of) the CONNECTION ADMIN privilege(s) for this operation
SET extra_max_connections=10;
ERROR HY000: Variable 'extra_max_connections' is a GLOBAL variable and should be set with SET GLOBAL
SET SESSION extra_max_connections=10;
ERROR HY000: Variable 'extra_max_connections' is a GLOBAL variable and should be set with SET GLOBAL
disconnect user1;
connection default;
DROP USER user1@localhost;
# Test that "SET extra_max_connections" is allowed with CONNECTION ADMIN
CREATE USER user1@localhost;
GRANT CONNECTION ADMIN ON *.* TO user1@localhost;
connect user1,localhost,user1,,;
connection user1;
SET GLOBAL extra_max_connections=10;
SET extra_max_connections=10;
ERROR HY000: Variable 'extra_max_connections' is a GLOBAL variable and should be set with SET GLOBAL
SET SESSION extra_max_connections=10;
ERROR HY000: Variable 'extra_max_connections' is a GLOBAL variable and should be set with SET GLOBAL
disconnect user1;
connection default;
DROP USER user1@localhost;
SET @@global.extra_max_connections=@global;