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-- connect (con1,localhost,root,,)
-- connect (con2,localhost,root,,)
-- connection con1
SET autocommit=0;
SELECT * FROM t1 FOR UPDATE;
-- if ($con1_extra_sql_present) {
-- eval $con1_extra_sql
-- }
-- connection con2
SET autocommit=0;
SELECT * FROM t2 FOR UPDATE;
-- if ($con2_extra_sql_present) {
-- eval $con2_extra_sql
-- }
-- if ($con1_should_be_rolledback) {
-- connection con1
-- send
INSERT INTO t2 VALUES (0);
-- connection con2
INSERT INTO t1 VALUES (0);
ROLLBACK;
-- connection con1
-- error ER_LOCK_DEADLOCK
-- reap
-- }
# else
-- if (!$con1_should_be_rolledback) {
-- connection con2
-- send
INSERT INTO t1 VALUES (0);
-- connection con1
INSERT INTO t2 VALUES (0);
ROLLBACK;
-- connection con2
-- error ER_LOCK_DEADLOCK
-- reap
-- }
-- connection default
DELETE FROM t5_nontrans;
-- disconnect con1
-- disconnect con2