53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
SET @start_global_value = @@global.optimizer_trace;
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SELECT @start_global_value;
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@start_global_value
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enabled=off,one_line=off
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select @@global.optimizer_trace;
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@@global.optimizer_trace
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enabled=off,one_line=off
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select @@session.optimizer_trace;
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@@session.optimizer_trace
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enabled=off,one_line=off
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show global variables like 'optimizer_trace';
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Variable_name Value
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optimizer_trace enabled=off,one_line=off
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show session variables like 'optimizer_trace';
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Variable_name Value
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optimizer_trace enabled=off,one_line=off
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select * from performance_schema.global_variables where variable_name='optimizer_trace';
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VARIABLE_NAME VARIABLE_VALUE
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optimizer_trace enabled=off,one_line=off
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select * from performance_schema.session_variables where variable_name='optimizer_trace';
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VARIABLE_NAME VARIABLE_VALUE
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optimizer_trace enabled=off,one_line=off
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set global optimizer_trace=1;
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select @@global.optimizer_trace;
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@@global.optimizer_trace
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enabled=on,one_line=off
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set session optimizer_trace=1;
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select @@session.optimizer_trace;
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@@session.optimizer_trace
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enabled=on,one_line=off
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set global optimizer_trace=0;
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select @@global.optimizer_trace;
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@@global.optimizer_trace
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enabled=off,one_line=off
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set session optimizer_trace=0;
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select @@session.optimizer_trace;
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@@session.optimizer_trace
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enabled=off,one_line=off
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set session optimizer_trace=default;
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select @@session.optimizer_trace;
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@@session.optimizer_trace
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enabled=off,one_line=off
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set global optimizer_trace=1.1;
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ERROR 42000: Incorrect argument type to variable 'optimizer_trace'
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set global optimizer_trace=1e1;
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ERROR 42000: Incorrect argument type to variable 'optimizer_trace'
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set session optimizer_trace="foobar";
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ERROR 42000: Variable 'optimizer_trace' can't be set to the value of 'foobar'
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SET @@global.optimizer_trace = @start_global_value;
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SELECT @@global.optimizer_trace;
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@@global.optimizer_trace
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enabled=off,one_line=off
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