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SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name
SELECT GET_LOCK('LOCK1',0);
GET_LOCK('LOCK1',0)
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SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name
MDL_SHARED_NO_WRITE MDL_EXPLICIT User lock LOCK1
SELECT RELEASE_LOCK('LOCK1');
RELEASE_LOCK('LOCK1')
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SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name
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