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53 lines
2.0 KiB
Plaintext
53 lines
2.0 KiB
Plaintext
SET @start_global_value = @@global.expensive_subquery_limit;
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SELECT @start_global_value;
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@start_global_value
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100
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select @@global.expensive_subquery_limit;
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@@global.expensive_subquery_limit
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100
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select @@session.expensive_subquery_limit;
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@@session.expensive_subquery_limit
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100
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show global variables like 'expensive_subquery_limit';
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Variable_name Value
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expensive_subquery_limit 100
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show session variables like 'expensive_subquery_limit';
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Variable_name Value
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expensive_subquery_limit 100
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select * from information_schema.global_variables where variable_name='expensive_subquery_limit';
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VARIABLE_NAME VARIABLE_VALUE
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EXPENSIVE_SUBQUERY_LIMIT 100
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select * from information_schema.session_variables where variable_name='expensive_subquery_limit';
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VARIABLE_NAME VARIABLE_VALUE
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EXPENSIVE_SUBQUERY_LIMIT 100
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set global expensive_subquery_limit=10;
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set session expensive_subquery_limit=20;
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select @@global.expensive_subquery_limit;
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@@global.expensive_subquery_limit
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10
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select @@session.expensive_subquery_limit;
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@@session.expensive_subquery_limit
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20
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show global variables like 'expensive_subquery_limit';
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Variable_name Value
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expensive_subquery_limit 10
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show session variables like 'expensive_subquery_limit';
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Variable_name Value
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expensive_subquery_limit 20
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select * from information_schema.global_variables where variable_name='expensive_subquery_limit';
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VARIABLE_NAME VARIABLE_VALUE
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EXPENSIVE_SUBQUERY_LIMIT 10
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select * from information_schema.session_variables where variable_name='expensive_subquery_limit';
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VARIABLE_NAME VARIABLE_VALUE
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EXPENSIVE_SUBQUERY_LIMIT 20
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set global expensive_subquery_limit=1.1;
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ERROR 42000: Incorrect argument type to variable 'expensive_subquery_limit'
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set global expensive_subquery_limit=1e1;
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ERROR 42000: Incorrect argument type to variable 'expensive_subquery_limit'
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set global expensive_subquery_limit="foo";
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ERROR 42000: Incorrect argument type to variable 'expensive_subquery_limit'
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SET @@global.expensive_subquery_limit = @start_global_value;
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SELECT @@global.expensive_subquery_limit;
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@@global.expensive_subquery_limit
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100
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