1select @@global.named_pipe;
2@@global.named_pipe
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4select @@session.named_pipe;
5ERROR HY000: Variable 'named_pipe' is a GLOBAL variable
6show global variables like 'named_pipe';
7Variable_name	Value
8named_pipe	OFF
9show session variables like 'named_pipe';
10Variable_name	Value
11named_pipe	OFF
12select * from information_schema.global_variables where variable_name='named_pipe';
13VARIABLE_NAME	VARIABLE_VALUE
14NAMED_PIPE	OFF
15select * from information_schema.session_variables where variable_name='named_pipe';
16VARIABLE_NAME	VARIABLE_VALUE
17NAMED_PIPE	OFF
18set global named_pipe=1;
19ERROR HY000: Variable 'named_pipe' is a read only variable
20set session named_pipe=1;
21ERROR HY000: Variable 'named_pipe' is a read only variable
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