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cc74bb3178
Early evaluation of subqueries in the WHERE conditions on I_S.*_STATUS tables, otherwise the subquery on this same table will try to acquire LOCK_status twice. sql/item.h: remove unused method
10 lines
496 B
Plaintext
10 lines
496 B
Plaintext
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#
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# MDEV-4029 SELECT on information_schema using a subquery locks up the information_schema table due to incorrect mutexes handling
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#
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select variable_name from information_schema.session_status where variable_name =
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(select variable_name from information_schema.session_status where variable_name = 'uptime');
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select variable_name from information_schema.session_variables where variable_name =
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(select variable_name from information_schema.session_variables where variable_name = 'basedir');
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