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select @@global.thread_stack;
@@global.thread_stack
294912
select @@session.thread_stack;
ERROR HY000: Variable 'thread_stack' is a GLOBAL variable
show global variables like 'thread_stack';
Variable_name Value
thread_stack 294912
show session variables like 'thread_stack';
Variable_name Value
thread_stack 294912
select * from information_schema.global_variables where variable_name='thread_stack';
VARIABLE_NAME VARIABLE_VALUE
THREAD_STACK 294912
select * from information_schema.session_variables where variable_name='thread_stack';
VARIABLE_NAME VARIABLE_VALUE
THREAD_STACK 294912
set global thread_stack=1;
ERROR HY000: Variable 'thread_stack' is a read only variable
set session thread_stack=1;
ERROR HY000: Variable 'thread_stack' is a read only variable
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