CREATE TABLE t (a int PRIMARY KEY, b int NOT NULL UNIQUE) engine = InnoDB;
connect prevent_purge,localhost,root,,;
start transaction with consistent snapshot;
connect con_del_1,localhost,root,,;
INSERT INTO t VALUES (20,20);
SET DEBUG_SYNC = 'innodb_row_search_for_mysql_exit SIGNAL first_del_row_search_mvcc_finished WAIT_FOR first_del_cont';
DELETE FROM t WHERE b = 20;
connect con_ins_1,localhost,root,,;
SET DEBUG_SYNC = 'now WAIT_FOR first_del_row_search_mvcc_finished';
SET DEBUG_SYNC = 'lock_wait_suspend_thread_enter SIGNAL first_ins_locked';
SET DEBUG_SYNC = 'ib_after_row_insert SIGNAL first_ins_row_inserted WAIT_FOR first_ins_cont';
INSERT INTO t VALUES(10, 20);
connect con_del_2,localhost,root,,;
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
SET DEBUG_SYNC = 'now WAIT_FOR first_ins_locked';
SET DEBUG_SYNC = 'lock_wait_suspend_thread_enter SIGNAL second_del_locked';
DELETE FROM t WHERE b = 20;
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR second_del_locked';
SET DEBUG_SYNC = 'now SIGNAL first_del_cont';
SET DEBUG_SYNC = 'now WAIT_FOR first_ins_row_inserted';
connection con_del_1;
connection default;
disconnect prevent_purge;
InnoDB		0 transactions not purged
SET DEBUG_SYNC = 'now SIGNAL first_ins_cont';
connection con_del_2;
connection con_ins_1;
connection default;
INSERT INTO t VALUES(30, 20);
disconnect con_ins_1;
disconnect con_del_1;
disconnect con_del_2;
connection default;
SET DEBUG_SYNC = 'RESET';
DROP TABLE t;