--source include/have_debug_sync.inc
--source include/have_innodb.inc

# Save the initial number of concurrent sessions
--source include/count_sessions.inc

--echo #
--echo # Bug #18451287 REDUNDANT DELETE MARKING AFTER DB_LOCK_WAIT
--echo #

create table t1 (f1 int primary key, f2 blob) engine=innodb;
create table t2 (f1 int primary key, f2 int,
   foreign key (f2) references t1(f1) on update cascade) engine=innodb;

show create table t1;
show create table t2;
insert into t1 values (1, repeat('+', 20000));
insert into t1 values (2, repeat('-', 20000));
insert into t1 values (3, repeat('=', 20000));
insert into t2 values (1, 2);

select f1, right(f2, 20) as p2 from t1;
select f1, f2 from t2;

--echo # Connection con1:
connect(con1,localhost,root,,test);
start transaction;
select f1, f2 from t2 for update;

--echo # Connection default:
connection default;
set debug_sync='lock_wait_suspend_thread_enter SIGNAL upd_waiting WAIT_FOR go_upd';
--echo # send: update t1 set f1 = 10 where f1 = 2;
--send
update t1 set f1 = 10 where f1 = 2;

--echo # Connection con1:
connection con1;
set debug_sync='now WAIT_FOR upd_waiting';
rollback;
set debug_sync='now SIGNAL go_upd';

--echo # Connection default:
connection default;
--echo # reap: update t1 set f1 = 10 where f1 = 2;
--reap

select f1, right(f2, 20) as p2 from t1;
select f1, f2 from t2;

drop table t2, t1;

set debug_sync = reset;

--echo #
--echo # Test Scenario: Two tables t1 -> t2 are involved in update cascade.
--echo # If DB_LOCK_WAIT happens when t1 is being updated and FK constraints
--echo # are being checked in t2, then retry must happen on t1.  The update
--echo # cascade happens in secondary index. For secondary index testing,
--echo # blobs are not needed.
--echo #

create table t1 (f1 int primary key, f2 int, key k1(f2)) engine=innodb;
create table t2 (f1 int primary key, f2 int,
   foreign key (f2) references t1(f2) on update cascade) engine=innodb;

show create table t1;
show create table t2;
insert into t1 values (1, 91);
insert into t2 values (1, 91);

select f1, f2 from t1;
select f1, f2 from t2;

--echo # Connection con1:
connection con1;
start transaction;
select f1, f2 from t2 for update;

--echo # Connection default:
connection default;
set debug_sync='lock_wait_suspend_thread_enter SIGNAL upd_waiting WAIT_FOR go_upd';
--echo # send: update t1 set f1 = 10 where f1 = 2;
--send
update t1 set f2 = 28 where f2 = 91;

--echo # Connection con1:
connection con1;
set debug_sync='now WAIT_FOR upd_waiting';
rollback;
set debug_sync='now SIGNAL go_upd';

--echo # Connection default:
connection default;
--echo # reap: update t1 set f1 = 10 where f1 = 2;
--reap

select f1, f2 from t1;
select f1, f2 from t2;

drop table t2, t1;

set debug_sync = reset;

--echo #
--echo # Test Scenario: Three tables t1 -> t2 -> t3 are involved in update cascade.
--echo # If DB_LOCK_WAIT happens when t2 is being updated, then retry must happen
--echo # on t2.
--echo #

create table t1 (f1 int primary key, f2 blob) engine=innodb;
create table t2 (f1 int primary key, f2 blob,
   foreign key (f1) references t1(f1) on update cascade) engine=innodb;
create table t3 (f1 int primary key, f2 blob,
   foreign key (f1) references t2(f1) on update cascade) engine=innodb;

show create table t1;
show create table t2;
show create table t3;

insert into t1 values (2, repeat('-', 20000));
insert into t2 values (2, repeat('%', 20000));
insert into t3 values (2, repeat('+', 20000));

select f1, right(f2, 20) as p2 from t1;
select f1, right(f2, 20) as p2 from t2;
select f1, right(f2, 20) as p2 from t3;

--echo # Connection con1:
connection con1;
start transaction;
select f1 from t3 for update;

--echo # Connection default:
connection default;
set debug_sync='lock_wait_suspend_thread_enter SIGNAL upd_waiting WAIT_FOR go_upd';
--echo # send: update t1 set f1 = 10 where f1 = 2;
--send
update t1 set f1 = 10 where f1 = 2;

--echo # Connection con1:
connection con1;
set debug_sync='now WAIT_FOR upd_waiting';
rollback;

--echo # The table t1 is updated.
--echo # In t2 delete-mark happened. Retry will happen on t2.
--echo # In t3 yet to be updated.
set session transaction isolation level read uncommitted;
start transaction;
select f1, right(f2, 20) as p2 from t1;
select f1, right(f2, 20) as p2 from t2;
select f1, right(f2, 20) as p2 from t3;
commit;

set debug_sync='now SIGNAL go_upd';

--echo # Connection default:
connection default;
--echo # reap: update t1 set f1 = 10 where f1 = 2;
--reap;

start transaction;
select f1, right(f2, 20) as p2 from t1;
select f1, right(f2, 20) as p2 from t2;
select f1, right(f2, 20) as p2 from t3;
commit;

drop table t3, t2, t1;

set debug_sync = reset;

--echo #
--echo # Test Scenario: Three tables t1 -> t2 -> t3 are involved in update
--echo # cascade. If DB_LOCK_WAIT happens when t2 is being updated, then
--echo # retry must happen on t2.  The update cascade is happening via
--echo # secondary index (hence blobs are not needed).
--echo #

create table t1 (f1 int primary key, f2 int, key k1(f2)) engine=innodb;
create table t2 (f1 int primary key, f2 int,
   foreign key (f2) references t1(f2) on update cascade) engine=innodb;
create table t3 (f1 int primary key, f2 int,
   foreign key (f2) references t2(f2) on update cascade) engine=innodb;

show create table t1;
show create table t2;
show create table t3;

insert into t1 values (2, 91);
insert into t2 values (2, 91);
insert into t3 values (2, 91);

select f1, f2 from t1;
select f1, f2 from t2;
select f1, f2 from t3;

--echo # Connection con1:
connection con1;
start transaction;
select f1 from t3 for update;

--echo # Connection default:
connection default;
set debug_sync='lock_wait_suspend_thread_enter SIGNAL upd_waiting WAIT_FOR go_upd';
--echo # send: update t1 set f2 = 28 where f2 = 91;
--send
update t1 set f2 = 28 where f2 = 91;

--echo # Connection con1:
connection con1;
set debug_sync='now WAIT_FOR upd_waiting';
rollback;

--echo # The table t1 is updated.
--echo # In t2 delete-mark happened. Retry will happen on t2.
--echo # In t3 yet to be updated.
set session transaction isolation level read uncommitted;
start transaction;
select f1, f2 from t1;
select f1, f2 from t2;
select f1, f2 from t3;
commit;

set debug_sync='now SIGNAL go_upd';

--echo # Connection default:
connection default;
disconnect con1;
--echo # reap: update t1 set f2 = 28 where f2 = 91;
--reap;

start transaction;
select f1, f2 from t1;
select f1, f2 from t2;
select f1, f2 from t3;
commit;

drop table t3, t2, t1;

set debug_sync = reset;

# Wait till all disconnects are completed
--source include/wait_until_count_sessions.inc