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SET @start_global_value = @@global.innodb_prefix_index_cluster_optimization;
SELECT @start_global_value;
@start_global_value
0
#
# exists as global only
#
Valid values are 'ON' and 'OFF'
select @@global.innodb_prefix_index_cluster_optimization in (0, 1);
@@global.innodb_prefix_index_cluster_optimization in (0, 1)
1
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
0
select @@session.innodb_prefix_index_cluster_optimization;
ERROR HY000: Variable 'innodb_prefix_index_cluster_optimization' is a GLOBAL variable
show global variables like 'innodb_prefix_index_cluster_optimization';
Variable_name Value
innodb_prefix_index_cluster_optimization OFF
show session variables like 'innodb_prefix_index_cluster_optimization';
Variable_name Value
innodb_prefix_index_cluster_optimization OFF
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
#
# show that it's writable
#
set global innodb_prefix_index_cluster_optimization = 'OFF';
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
0
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
set @@global.innodb_prefix_index_cluster_optimization = 'ON';
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
1
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
set global innodb_prefix_index_cluster_optimization = 0;
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
0
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
set @@global.innodb_prefix_index_cluster_optimization = 1;
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
1
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
set session innodb_prefix_index_cluster_optimization = 'OFF';
ERROR HY000: Variable 'innodb_prefix_index_cluster_optimization' is a GLOBAL variable and should be set with SET GLOBAL
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
1
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
set @@session.innodb_prefix_index_cluster_optimization = 'ON';
ERROR HY000: Variable 'innodb_prefix_index_cluster_optimization' is a GLOBAL variable and should be set with SET GLOBAL
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
1
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
#
# incorrect types
#
set global innodb_prefix_index_cluster_optimization = 1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_prefix_index_cluster_optimization'
set global innodb_prefix_index_cluster_optimization = 1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_prefix_index_cluster_optimization'
set global innodb_prefix_index_cluster_optimization = 2;
ERROR 42000: Variable 'innodb_prefix_index_cluster_optimization' can't be set to the value of '2'
set global innodb_prefix_index_cluster_optimization = -3;
ERROR 42000: Variable 'innodb_prefix_index_cluster_optimization' can't be set to the value of '-3'
select @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
1
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
set global innodb_prefix_index_cluster_optimization = 'AUTO';
ERROR 42000: Variable 'innodb_prefix_index_cluster_optimization' can't be set to the value of 'AUTO'
#
# Cleanup
#
SET @@global.innodb_prefix_index_cluster_optimization = @start_global_value;
SELECT @@global.innodb_prefix_index_cluster_optimization;
@@global.innodb_prefix_index_cluster_optimization
0
|
