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select @@global.have_profiling="1";
@@global.have_profiling="1"
0
select @@session.have_profiling;
ERROR HY000: Variable 'have_profiling' is a GLOBAL variable
show global variables like 'have_profiling';
Variable_name Value
have_profiling #
show session variables like 'have_profiling';
Variable_name Value
have_profiling #
select * from information_schema.global_variables where variable_name='have_profiling';
VARIABLE_NAME VARIABLE_VALUE
HAVE_PROFILING #
select * from information_schema.session_variables where variable_name='have_profiling';
VARIABLE_NAME VARIABLE_VALUE
HAVE_PROFILING #
set global have_profiling=1;
ERROR HY000: Variable 'have_profiling' is a read only variable
set session have_profiling=1;
ERROR HY000: Variable 'have_profiling' is a read only variable
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