1connect con1,localhost,root,,; 2connect con2,localhost,root,,; 3connection con1; 4disconnect con1; 5connection con2; 6DROP TABLE IF EXISTS t1; 7CREATE TABLE t1 (n INT); 8INSERT INTO t1 VALUES (1),(2),(3); 9SELECT * FROM t1; 10n 111 122 133 14DROP TABLE t1; 15connection default; 16disconnect con2; 17connection default; 18SELECT GET_LOCK("dangling", 0); 19GET_LOCK("dangling", 0) 201 21connect con1, localhost, root,,; 22connection con1; 23SELECT GET_LOCK('dangling', 3600);; 24connection default; 25disconnect con1; 26connect con1, localhost, root,,; 27SELECT GET_LOCK('dangling', 3600);; 28connection default; 29SELECT RELEASE_LOCK('dangling'); 30RELEASE_LOCK('dangling') 311 32connection con1; 33GET_LOCK('dangling', 3600) 341 35connection default; 36disconnect con1; 37