select @@global.have_profiling="1";
@@global.have_profiling="1"
0
Warnings:
Warning	1287	'@@have_profiling' is deprecated and will be removed in a future release.
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
