trigger-trans.test

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

# Tests which involve triggers and transactions
# (or just InnoDB storage engine)
--source include/have_innodb.inc

--disable_warnings
drop table if exists t1;
--enable_warnings

# Test for bug #18153 "OPTIMIZE/ALTER on transactional tables corrupt
#                      triggers/triggers are lost".

create table t1 (a varchar(16), b int) engine=innodb;
delimiter |;
create trigger t1_bi before insert on t1 for each row
begin
 set new.a := upper(new.a);
 set new.b := new.b + 3;
end|
delimiter ;|
select trigger_schema, trigger_name, event_object_schema,
       event_object_table, action_statement from information_schema.triggers
       where event_object_schema = 'test' and event_object_table = 't1';
insert into t1 values ('The Lion', 10);
select * from t1;
optimize table t1;
select trigger_schema, trigger_name, event_object_schema,
       event_object_table, action_statement from information_schema.triggers
       where event_object_schema = 'test' and event_object_table = 't1';
insert into t1 values ('The Unicorn', 20);
select * from t1;
alter table t1 add column c int default 0;
select trigger_schema, trigger_name, event_object_schema,
       event_object_table, action_statement from information_schema.triggers
       where event_object_schema = 'test' and event_object_table = 't1';
insert into t1 values ('Alice', 30, 1);
select * from t1;
# Special tricky cases allowed by ALTER TABLE ... RENAME
alter table t1 rename to t1;
select trigger_schema, trigger_name, event_object_schema,
       event_object_table, action_statement from information_schema.triggers
       where event_object_schema = 'test' and event_object_table = 't1';
insert into t1 values ('The Crown', 40, 1);
select * from t1;
alter table t1 rename to t1, add column d int default 0;
select trigger_schema, trigger_name, event_object_schema,
       event_object_table, action_statement from information_schema.triggers
       where event_object_schema = 'test' and event_object_table = 't1';
insert into t1 values ('The Pie', 50, 1, 1);
select * from t1;
drop table t1;

--echo
--echo Bug#26141 mixing table types in trigger causes full
--echo table lock on innodb table
--echo
--echo Ensure we do not open and lock tables for the triggers we do not
--echo fire.
--echo
--disable_warnings
drop table if exists t1, t2, t3;
drop trigger if exists trg_bug26141_au;
drop trigger if exists trg_bug26141_ai;
--enable_warnings
# Note, for InnoDB to allow concurrent UPDATE and INSERT the
# table must have a unique key.
create table t1 (c int primary key) engine=innodb;
create table t2 (c int) engine=myisam;
create table t3 (c int) engine=myisam;
insert into t1 (c) values (1);
delimiter |;

create trigger trg_bug26141_ai after insert on t1
for each row
begin
  insert into t2 (c) values (1);
# We need the 'sync' lock to synchronously wait in connection 2 till 
# the moment when the trigger acquired all the locks.
  select release_lock("lock_bug26141_sync") into @a;
# 1000 is time in seconds of lock wait timeout -- this is a way
# to cause a manageable sleep up to 1000 seconds
  select get_lock("lock_bug26141_wait", 1000) into @a;
end|

create trigger trg_bug26141_au after update on t1
for each row
begin
  insert into t3 (c) values (1);
end|
delimiter ;|

# Establish an alternative connection.
--connect (connection_aux,localhost,root,,test,,)
--connect (connection_update,localhost,root,,test,,)

connection connection_aux;
# Lock the wait lock, it must not be locked, so specify zero timeout.
select get_lock("lock_bug26141_wait", 0);

#
connection default;
#
# Run the trigger synchronously 
#
select get_lock("lock_bug26141_sync", /* must not be priorly locked */ 0);
# Will acquire the table level locks, perform the insert into t2,
# release the sync lock and block on the wait lock.
send insert into t1 (c) values (2);

connection connection_update;
# Wait for the trigger to acquire its locks and unlock the sync lock.
select get_lock("lock_bug26141_sync", 1000); 
#
# This must continue: after the fix for the bug, we do not
# open tables for t2, and with c=4 innobase allows the update
# to run concurrently with insert.
update t1 set c=3 where c=1;
select release_lock("lock_bug26141_sync"); 
connection connection_aux;
select release_lock("lock_bug26141_wait");
connection default;
reap;
select * from t1;
select * from t2;
select * from t3;

# Drops the trigger as well.
drop table t1, t2, t3;
disconnect connection_update;
disconnect connection_aux;


--echo End of 5.0 tests