44 lines
1.2 KiB
Plaintext
44 lines
1.2 KiB
Plaintext
--source include/have_optimizer_trace.inc
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SET @start_global_value = @@global.optimizer_trace;
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SELECT @start_global_value;
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#
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# exists as global and session
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#
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select @@global.optimizer_trace;
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select @@session.optimizer_trace;
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show global variables like 'optimizer_trace';
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show session variables like 'optimizer_trace';
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--disable_warnings
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select * from performance_schema.global_variables where variable_name='optimizer_trace';
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select * from performance_schema.session_variables where variable_name='optimizer_trace';
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--enable_warnings
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#
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# show that it's writable
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#
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set global optimizer_trace=1;
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select @@global.optimizer_trace;
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set session optimizer_trace=1;
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select @@session.optimizer_trace;
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set global optimizer_trace=0;
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select @@global.optimizer_trace;
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set session optimizer_trace=0;
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select @@session.optimizer_trace;
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set session optimizer_trace=default;
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select @@session.optimizer_trace;
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#
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# incorrect assignments
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#
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--error ER_WRONG_TYPE_FOR_VAR
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set global optimizer_trace=1.1;
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--error ER_WRONG_TYPE_FOR_VAR
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set global optimizer_trace=1e1;
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--error ER_WRONG_VALUE_FOR_VAR
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set session optimizer_trace="foobar";
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SET @@global.optimizer_trace = @start_global_value;
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SELECT @@global.optimizer_trace;
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