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# Scenario: Test deadlock with high priority transactions # T1= ({R(A), W(A)}, HIGH_PRIORITY) # T2= ({R(B), W(B)}, HIGH_PRIORITY) # T1= ({R(B), W(B)}, HIGH_PRIORITY) --> T1 Wait # T2= ({R(A), W(A)}, HIGH_PRIORITY) --> T2 Dead Lock # # Outcome: T2 should error. --source include/have_innodb.inc --source include/count_sessions.inc CREATE TABLE t1 (c1 INT NOT NULL PRIMARY KEY) ENGINE=InnoDB; INSERT INTO t1 VALUES (0); INSERT INTO t1 VALUES (10); --connect(con1,localhost,root,,test) --connect(con2,localhost,root,,test) --echo --echo # On connection 1 --connection con1 --source include/start_transaction_high_prio.inc UPDATE t1 SET c1=1 WHERE c1=0; --echo --echo # On connection 2 --connection con2 --source include/start_transaction_high_prio.inc UPDATE t1 SET c1=12 WHERE c1=10; --echo --echo # On connection 1 --connection con1 let $con1_id=`SELECT CONNECTION_ID()`; --echo # Send --send UPDATE t1 SET c1=11 WHERE c1=10; --echo --echo # On connection 2 --connection con2 --disable_query_log eval SET @con1_id = $con1_id; --enable_query_log let $wait_timeout = 10; let $wait_condition= SELECT COUNT(*) = 1 FROM information_schema.processlist WHERE id = @con1_id AND INFO = 'UPDATE t1 SET c1=11 WHERE c1=10' AND STATE = 'updating'; --source include/wait_condition.inc --sleep 1 --error ER_LOCK_DEADLOCK UPDATE t1 SET c1=2 WHERE c1=0; --disconnect con2 --echo --echo # On connection 1 --connection con1 --echo # Reap UPDATE t1 SET c1=11 WHERE c1=10 --reap COMMIT; --disconnect con1 --connection default --let $assert_text= 'There is a 1 in t1' --let $assert_cond= [SELECT COUNT(*) AS count FROM t1 WHERE t1.c1 = 1, count, 1] = 1 --source include/assert.inc --let $assert_text= 'There is no 2 in t1' --let $assert_cond= [SELECT COUNT(*) AS count FROM t1 WHERE t1.c1 = 2, count, 1] = 0 --source include/assert.inc --let $assert_text= 'There is no 0 in t1' --let $assert_cond= [SELECT COUNT(*) AS count FROM t1 WHERE t1.c1 = 0, count, 1] = 0 --source include/assert.inc DROP TABLE t1; --source include/wait_until_count_sessions.inc