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#
# wl#9383 INNODB: ADD AN OPTION TO TURN OFF/ON DEADLOCK CHECKER
#
--source include/have_innodb.inc
--source include/count_sessions.inc
--disable_query_log
call mtr.add_suppression("InnoDB: Transaction was aborted due to ");
--enable_query_log
let $have_deadlock=`select @@GLOBAL.innodb_deadlock_detect`;
connection default;
CREATE TABLE t1(
id INT,
PRIMARY KEY(id)
) ENGINE=InnoDB;
CREATE TABLE dl(
id INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
cnt INT UNSIGNED
) ENGINE=InnoDB;
INSERT INTO t1 VALUES(1), (2), (3);
# Preserve the initial value of the deadlock counter
INSERT INTO dl(cnt) SELECT variable_value FROM information_schema.global_status WHERE variable_name LIKE 'Innodb_deadlocks';
# We are not interested query results, only errors
--disable_result_log
BEGIN;
SELECT * FROM t1 WHERE id = 1 LOCK IN SHARE MODE;
connect (con1,localhost,root,,);
BEGIN;
SELECT * FROM t1 WHERE id = 2 LOCK IN SHARE MODE;
connect (con2,localhost,root,,);
BEGIN;
SELECT * FROM t1 WHERE id = 2 LOCK IN SHARE MODE;
send SELECT * FROM t1 WHERE id = 1 FOR UPDATE;
connection default;
send SELECT * FROM t1 WHERE id = 2 FOR UPDATE;
connection con2;
if (!$have_deadlock) {
--error ER_LOCK_WAIT_TIMEOUT
reap;
disconnect con1;
}
if ($have_deadlock) {
connection con1;
COMMIT;
disconnect con1;
connection con2;
--error 0,ER_LOCK_DEADLOCK,ER_LOCK_WAIT_TIMEOUT
reap;
}
ROLLBACK;
disconnect con2;
#
# Note here that con1 is the older transaction as it
# query started wait first. Thus, con1 gets lock
# wait timeout first. There is possibility that
# default connection gets lock timeout also or
# as con1 is rolled back it gets the locks it waited
# and does the update.
#
connection default;
--let $valid_deadlock_cnt= 1
if (!$have_deadlock) {
--error 0,ER_LOCK_WAIT_TIMEOUT
reap;
}
if ($have_deadlock) {
--error 0,ER_LOCK_DEADLOCK
reap;
--disable_query_log
INSERT INTO dl(cnt) SELECT variable_value FROM information_schema.global_status WHERE variable_name LIKE 'Innodb_deadlocks';
set @init_deadlock_cnt = (SELECT min(k.cnt) FROM dl k);
--let $valid_deadlock_cnt= `SELECT (max(t.cnt-@init_deadlock_cnt) = 1) FROM dl t`
--enable_query_log
}
# Indicates that the deadlock counter works well.
# Use the default =1 where is no deadlock detection,
# to enable unconditional check.
--echo 'Deadlock counter is valid';
--echo $valid_deadlock_cnt
ROLLBACK;
--enable_result_log
DROP TABLE t1;
DROP TABLE dl;
--source include/wait_until_count_sessions.inc
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