#
#  2011-08-01  Added
#

--source include/have_innodb.inc

SET @start_global_value = @@global.innodb_rollback_segments;
SELECT @start_global_value;

#
# exists as global only
#
--echo Valid values are zero or above
SELECT @@global.innodb_rollback_segments >=0;
SELECT @@global.innodb_rollback_segments <=128;
SELECT @@global.innodb_rollback_segments;

--error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT @@session.innodb_rollback_segments;
SHOW global variables LIKE 'innodb_rollback_segments';
SHOW session variables LIKE 'innodb_rollback_segments';
SELECT * FROM information_schema.global_variables 
WHERE variable_name='innodb_rollback_segments';
SELECT * FROM information_schema.session_variables 
WHERE variable_name='innodb_rollback_segments';

#
# show that it's writable
#
SET global innodb_rollback_segments=100;
SELECT @@global.innodb_rollback_segments;
SELECT * FROM information_schema.global_variables 
WHERE variable_name='innodb_rollback_segments';
SELECT * FROM information_schema.session_variables 
WHERE variable_name='innodb_rollback_segments';
--error ER_GLOBAL_VARIABLE
SET session innodb_rollback_segments=1;

#
# incorrect types
#
--error ER_WRONG_TYPE_FOR_VAR
SET global innodb_rollback_segments=1.1;
--error ER_WRONG_TYPE_FOR_VAR
SET global innodb_rollback_segments=1e1;
--error ER_WRONG_TYPE_FOR_VAR
SET global innodb_rollback_segments="foo";
SET global innodb_rollback_segments=-7;
SELECT @@global.innodb_rollback_segments;
SELECT * FROM information_schema.global_variables 
WHERE variable_name='innodb_rollback_segments';

#
# cleanup
#

SET @@global.innodb_rollback_segments = @start_global_value;
SELECT @@global.innodb_rollback_segments;