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43 lines
1.1 KiB
Plaintext
43 lines
1.1 KiB
Plaintext
# ulong global
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SET @start_global_value = @@global.extra_max_connections;
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#
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# exists as global only
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#
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select @@global.extra_max_connections;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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select @@session.extra_max_connections;
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show global variables like 'extra_max_connections';
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show session variables like 'extra_max_connections';
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select * from information_schema.global_variables where variable_name='extra_max_connections';
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select * from information_schema.session_variables where variable_name='extra_max_connections';
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#
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# show that it's writable
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#
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set global extra_max_connections=1;
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select @@global.extra_max_connections;
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--error ER_GLOBAL_VARIABLE
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set session extra_max_connections=1;
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#
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# incorrect types
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#
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--error ER_WRONG_TYPE_FOR_VAR
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set global extra_max_connections=1.1;
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--error ER_WRONG_TYPE_FOR_VAR
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set global extra_max_connections=1e1;
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--error ER_WRONG_TYPE_FOR_VAR
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set global extra_max_connections="foo";
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#
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# min/max values
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#
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set global extra_max_connections=0;
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select @@global.extra_max_connections;
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set global extra_max_connections=cast(-1 as unsigned int);
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select @@global.extra_max_connections;
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SET @@global.extra_max_connections = @start_global_value;
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