select @@global.rand_seed1;
ERROR HY000: Variable 'rand_seed1' is a SESSION variable
set session rand_seed1=default;
ERROR 42000: Variable 'rand_seed1' doesn't have a default value
set session rand_seed1=10969771;
select @@session.rand_seed1;
@@session.rand_seed1
10969771
show global variables like 'rand_seed1';
Variable_name	Value
show session variables like 'rand_seed1';
Variable_name	Value
rand_seed1	10969771
select * from information_schema.global_variables where variable_name='rand_seed1';
VARIABLE_NAME	VARIABLE_VALUE
select * from information_schema.session_variables where variable_name='rand_seed1';
VARIABLE_NAME	VARIABLE_VALUE
RAND_SEED1	10969771
set session rand_seed1=1;
select @@session.rand_seed1;
@@session.rand_seed1
1
select * from information_schema.global_variables where variable_name='rand_seed1';
VARIABLE_NAME	VARIABLE_VALUE
select * from information_schema.session_variables where variable_name='rand_seed1';
VARIABLE_NAME	VARIABLE_VALUE
RAND_SEED1	1
set global rand_seed1=1;
ERROR HY000: Variable 'rand_seed1' is a SESSION variable and can't be used with SET GLOBAL
set session rand_seed1=1.1;
ERROR 42000: Incorrect argument type to variable 'rand_seed1'
set session rand_seed1=1e1;
ERROR 42000: Incorrect argument type to variable 'rand_seed1'
set session rand_seed1="foo";
ERROR 42000: Incorrect argument type to variable 'rand_seed1'