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SET @start_global_value = @@global.alter_algorithm;
--error ER_WRONG_TYPE_FOR_VAR
SET GLOBAL alter_algorithm=1.1;
--error ER_WRONG_VALUE_FOR_VAR
SET GLOBAL alter_algorithm=-1;
--error ER_WRONG_VALUE_FOR_VAR
SET GLOBAL alter_algorithm=weird;
SET GLOBAL alter_algorithm=4;
SELECT @@global.alter_algorithm;
SET GLOBAL alter_algorithm=3;
SELECT @@global.alter_algorithm;
SET GLOBAL alter_algorithm=0;
SELECT @@global.alter_algorithm;
SET GLOBAL alter_algorithm=1;
SELECT @@global.alter_algorithm;
SET GLOBAL alter_algorithm=2;
SELECT @@global.alter_algorithm;
--error ER_WRONG_VALUE_FOR_VAR
SET GLOBAL alter_algorithm=5;
SELECT @@global.alter_algorithm;
SET GLOBAL alter_algorithm=NOCOPY;
--error ER_WRONG_TYPE_FOR_VAR
SET alter_algorithm=1.1;
--error ER_WRONG_VALUE_FOR_VAR
SET alter_algorithm=-1;
--error ER_WRONG_VALUE_FOR_VAR
SET alter_algorithm=weird;
SET alter_algorithm=4;
SELECT @@alter_algorithm;
SET alter_algorithm=3;
SELECT @@alter_algorithm;
SET alter_algorithm=0;
SELECT @@alter_algorithm;
SET alter_algorithm=1;
SELECT @@alter_algorithm;
SET alter_algorithm=2;
SELECT @@alter_algorithm;
--error ER_WRONG_VALUE_FOR_VAR
SET alter_algorithm=5;
SELECT @@alter_algorithm;
SET SESSION alter_algorithm=INSTANT;
SHOW SESSION VARIABLES LIKE 'alter_algorithm';
SET SESSION alter_algorithm=DEFAULT;
SHOW SESSION VARIABLES LIKE 'alter_algorithm';
SET SESSION alter_algorithm='DEFAULT';
SHOW SESSION VARIABLES LIKE 'alter_algorithm';
SET SESSION alter_algorithm=DEFAULT;
SHOW SESSION VARIABLES LIKE 'alter_algorithm';
SET GLOBAL alter_algorithm=DEFAULT;
SHOW SESSION VARIABLES LIKE 'alter_algorithm';
SET SESSION alter_algorithm=DEFAULT;
SHOW SESSION VARIABLES LIKE 'alter_algorithm';
SET GLOBAL alter_algorithm = @start_global_value;
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