--source include/not_embedded.inc

--echo #
--echo # MDEV-21960 Bind READ_ONLY ADMIN to @@read_only
--echo #

--echo # Test that "SET read_only" is not allowed without READ_ONLY ADMIN or SUPER

CREATE USER user1@localhost;
GRANT ALL PRIVILEGES ON *.* TO user1@localhost;
REVOKE READ_ONLY ADMIN, SUPER ON *.* FROM user1@localhost;
--connect(user1,localhost,user1,,)
--connection user1
--error ER_SPECIFIC_ACCESS_DENIED_ERROR
SET GLOBAL read_only=0;
--error ER_GLOBAL_VARIABLE
SET read_only=0;
--error ER_GLOBAL_VARIABLE
SET SESSION read_only=0;
--disconnect user1
--connection default
DROP USER user1@localhost;

--echo # Test that "SET read_only" is allowed with READ_ONLY ADMIN

CREATE USER user1@localhost;
GRANT READ_ONLY ADMIN ON *.* TO user1@localhost;
--connect(user1,localhost,user1,,)
--connection user1
SET GLOBAL read_only=0;
--error ER_GLOBAL_VARIABLE
SET read_only=0;
--error ER_GLOBAL_VARIABLE
SET SESSION read_only=0;
--disconnect user1
--connection default
DROP USER user1@localhost;

--echo # Test that "SET read_only" is allowed with SUPER

CREATE USER user1@localhost;
GRANT SUPER ON *.* TO user1@localhost;
--connect(user1,localhost,user1,,)
--connection user1
SET GLOBAL read_only=0;
--error ER_GLOBAL_VARIABLE
SET read_only=0;
--error ER_GLOBAL_VARIABLE
SET SESSION read_only=0;
--disconnect user1
--connection default
DROP USER user1@localhost;