--source include/have_innodb_disallow_writes.inc

--echo #
--echo # innodb_disallow_writes
--echo #

--echo # save the initial value
SET @innodb_disallow_writes_global_saved = @@global.innodb_disallow_writes;

--echo # default
SELECT @@global.innodb_disallow_writes;

--echo
--echo # scope
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT @@session.innodb_disallow_writes;
SET @@global.innodb_disallow_writes=OFF;
SELECT @@global.innodb_disallow_writes;
SET @@global.innodb_disallow_writes=ON;
SELECT @@global.innodb_disallow_writes;

--echo
--echo # valid values
SET @@global.innodb_disallow_writes='OFF';
SELECT @@global.innodb_disallow_writes;
SET @@global.innodb_disallow_writes=ON;
SELECT @@global.innodb_disallow_writes;
SET @@global.innodb_disallow_writes=default;
SELECT @@global.innodb_disallow_writes;

--echo
--echo # invalid values
--error ER_WRONG_VALUE_FOR_VAR
SET @@global.innodb_disallow_writes=NULL;
--error ER_WRONG_VALUE_FOR_VAR
SET @@global.innodb_disallow_writes='junk';

--echo
--echo # restore the initial value
SET @@global.innodb_disallow_writes = @innodb_disallow_writes_global_saved;

--echo # End of test