A fix and a test case for Bug#26141 mixing table types in trigger

causes full table lock on innodb table.
Also fixes Bug#28502 Triggers that update another innodb table 
will block on X lock unnecessarily (duplciate).
Code review fixes.

Both bugs' synopses are misleading: InnoDB table is
not X locked. The statements, however, cannot proceed concurrently, 
but this happens due to lock conflicts for tables used in triggers,
not for the InnoDB table. 

If a user had an InnoDB table, and two triggers, AFTER UPDATE and 
AFTER INSERT, competing for different resources (e.g. two distinct
MyISAM tables), then these two triggers would not be able to execute
concurrently. Moreover, INSERTS/UPDATES of the InnoDB table would
not be able to run concurrently. 
The problem had other side-effects (see respective bug reports).

This behavior was a consequence of a shortcoming of the pre-locking
algorithm, which would not distinguish between different DML operations
(e.g. INSERT and DELETE) and pre-lock all the tables
that are used by any trigger defined on the subject table.

The idea of the fix is to extend the pre-locking algorithm to keep track,
for each table, what DML operation it is used for and not
load triggers that are known to never be fired.


mysql-test/r/trigger-trans.result:
  Update results (Bug#26141)
mysql-test/r/trigger.result:
  Update results (Bug#28502)
mysql-test/t/trigger-trans.test:
  Add a test case for Bug#26141 mixing table types in trigger causes 
  full table lock on innodb table.
mysql-test/t/trigger.test:
  Add a test case for Bug#28502 Triggers that update another innodb 
  table will block echo on X lock unnecessarily. Add more test 
  coverage for triggers.
sql/item.h:
  enum trg_event_type is needed in table.h
sql/sp.cc:
  Take into account table_list->trg_event_map when determining
  what tables to pre-lock. 
  
  After this change, if we attempt to fire a 
  trigger for which we had not pre-locked any tables, error
  'Table was not locked with LOCK TABLES' will be printed.
  This, however, should never happen, provided the pre-locking
  algorithm has no programming bugs.
  
  Previously a trigger key in the sroutines hash was based on the name 
  of the table the trigger belongs to. This was possible because we would
  always add to the pre-locking list all the triggers defined for a table when
  handling this table.
  Now the key is based on the name of the trigger, owing
  to the fact that a trigger name must be unique in the database it
  belongs to.
sql/sp_head.cc:
  Generate sroutines hash key in init_spname(). This is a convenient
  place since there we have all the necessary information and can
  avoid an extra alloc.
  
  Maintain and merge trg_event_map when adding and merging elements
  of the pre-locking list.
sql/sp_head.h:
  Add ,m_sroutines_key member, used when inserting the sphead for a
  trigger into the cache of routines used by a statement.
  Previously the key was based on the table name the trigger belonged
  to, since for a given table we would add to the sroutines list
  all the triggers defined on it.
sql/sql_lex.cc:
  Introduce a new lex step: set_trg_event_type_for_tables().
  It is called when we have finished parsing but before opening
  and locking tables. Now this step is used to evaluate for each
  TABLE_LIST instance which INSERT/UPDATE/DELETE operation, if any,
  it is used in.
  In future this method could be extended to aggregate other information
  that is hard to aggregate during parsing.
sql/sql_lex.h:
  Add declaration for set_trg_event_type_for_tables().
sql/sql_parse.cc:
  Call set_trg_event_type_for_tables() after MYSQLparse(). Remove tabs.
sql/sql_prepare.cc:
  Call set_trg_event_type_for_tables() after  MYSQLparse().
sql/sql_trigger.cc:
  Call set_trg_event_type_for_tables() after MYSQLparse().
sql/sql_trigger.h:
  Remove an obsolete member.
sql/sql_view.cc:
  Call set_trg_event_type_for_tables() after MYSQLparse().
sql/sql_yacc.yy:
  Move assignment of sp_head::m_type before calling sp_head::init_spname(), 
  one is now used inside another.
sql/table.cc:
  Implement TABLE_LIST::set_trg_event_map() - a method that calculates
  wh triggers may be fired on this table when executing a statement.
sql/table.h:
  Add missing declarations.
  Move declaration of trg_event_type from item.h (it will be needed for 
  trg_event_map bitmap when we start using Bitmap template instead
  of uint8).

2 files changed, 516 insertions, 0 deletions

diff --git a/mysql-test/r/trigger-trans.result b/mysql-test/r/trigger-trans.result
index b56abf1f59a..cd5f629564f 100644
--- a/mysql-test/r/trigger-trans.result
+++ b/mysql-test/r/trigger-trans.result
@@ -82,3 +82,62 @@ ALICE	33	1	0
 THE CROWN	43	1	0
 THE PIE	53	1	1
 drop table t1;
+
+Bug#26141 mixing table types in trigger causes full
+table lock on innodb table
+
+Ensure we do not open and lock tables for the triggers we do not
+fire.
+
+drop table if exists t1, t2, t3;
+drop trigger if exists trg_bug26141_au;
+drop trigger if exists trg_bug26141_ai;
+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);
+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|
+select get_lock("lock_bug26141_wait", 0);
+get_lock("lock_bug26141_wait", 0)
+1
+select get_lock("lock_bug26141_sync", /* must not be priorly locked */ 0);
+get_lock("lock_bug26141_sync", /* must not be priorly locked */ 0)
+1
+insert into t1 (c) values (2);
+select get_lock("lock_bug26141_sync", 1000);
+get_lock("lock_bug26141_sync", 1000)
+1
+update t1 set c=3 where c=1;
+select release_lock("lock_bug26141_sync");
+release_lock("lock_bug26141_sync")
+1
+select release_lock("lock_bug26141_wait");
+release_lock("lock_bug26141_wait")
+1
+select * from t1;
+c
+2
+3
+select * from t2;
+c
+1
+select * from t3;
+c
+1
+drop table t1, t2, t3;
+End of 5.0 tests
diff --git a/mysql-test/r/trigger.result b/mysql-test/r/trigger.result
index 290929d476d..4b18e525e62 100644
--- a/mysql-test/r/trigger.result
+++ b/mysql-test/r/trigger.result
@@ -1476,4 +1476,461 @@ DROP TRIGGER t1_test;
 DROP TABLE t1,t2;
 SET SESSION LOW_PRIORITY_UPDATES=DEFAULT;
 SET GLOBAL LOW_PRIORITY_UPDATES=DEFAULT;
+
+Bug#28502 Triggers that update another innodb table will block
+on X lock unnecessarily
+
+Ensure we do not open and lock tables for triggers we do not fire.
+
+drop table if exists t1, t2;
+drop trigger if exists trg_bug28502_au;
+create table t1 (id int, count int);
+create table t2 (id int);
+create trigger trg_bug28502_au before update on t2
+for each row
+begin
+if (new.id is not null) then
+update t1 set count= count + 1 where id = old.id;
+end if;
+end|
+insert into t1 (id, count) values (1, 0);
+lock table t1 write;
+insert into t2 set id=1;
+unlock tables;
+update t2 set id=1 where id=1;
+select * from t1;
+id	count
+1	1
+select * from t2;
+id
+1
+drop table t1, t2;
+
+Additionally, provide test coverage for triggers and 
+all MySQL data changing commands.
+
+drop table if exists t1, t2, t1_op_log;
+drop view if exists v1;
+drop trigger if exists trg_bug28502_bi;
+drop trigger if exists trg_bug28502_ai;
+drop trigger if exists trg_bug28502_bu;
+drop trigger if exists trg_bug28502_au;
+drop trigger if exists trg_bug28502_bd;
+drop trigger if exists trg_bug28502_ad;
+create table t1 (id int primary key auto_increment, operation varchar(255));
+create table t2 (id int primary key);
+create table t1_op_log(operation varchar(255));
+create view v1 as select * from t1;
+create trigger trg_bug28502_bi before insert on t1
+for each row
+insert into t1_op_log (operation)
+values (concat("Before INSERT, new=", new.operation));
+create trigger trg_bug28502_ai after insert on t1
+for each row
+insert into t1_op_log (operation)
+values (concat("After INSERT, new=", new.operation));
+create trigger trg_bug28502_bu before update on t1
+for each row
+insert into t1_op_log (operation)
+values (concat("Before UPDATE, new=", new.operation,
+", old=", old.operation));
+create trigger trg_bug28502_au after update on t1
+for each row
+insert into t1_op_log (operation)
+values (concat("After UPDATE, new=", new.operation,
+", old=", old.operation));
+create trigger trg_bug28502_bd before delete on t1
+for each row
+insert into t1_op_log (operation)
+values (concat("Before DELETE, old=", old.operation));
+create trigger trg_bug28502_ad after delete on t1
+for each row
+insert into t1_op_log (operation)
+values (concat("After DELETE, old=", old.operation));
+insert into t1 (operation) values ("INSERT");
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	INSERT
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT
+After INSERT, new=INSERT
+truncate t1_op_log;
+update t1 set operation="UPDATE" where id=@id;
+select * from t1;
+id	operation
+1	UPDATE
+select * from t1_op_log;
+operation
+Before UPDATE, new=UPDATE, old=INSERT
+After UPDATE, new=UPDATE, old=INSERT
+truncate t1_op_log;
+delete from t1 where id=@id;
+select * from t1;
+id	operation
+select * from t1_op_log;
+operation
+Before DELETE, old=UPDATE
+After DELETE, old=UPDATE
+truncate t1;
+truncate t1_op_log;
+insert into t1 (id, operation) values
+(NULL, "INSERT ON DUPLICATE KEY UPDATE, inserting a new key")
+on duplicate key update id=NULL, operation="Should never happen";
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+After INSERT, new=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+truncate t1_op_log;
+insert into t1 (id, operation) values
+(@id, "INSERT ON DUPLICATE KEY UPDATE, the key value is the same")
+on duplicate key update id=NULL,
+operation="INSERT ON DUPLICATE KEY UPDATE, updating the duplicate";
+select * from t1;
+id	operation
+0	INSERT ON DUPLICATE KEY UPDATE, updating the duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ON DUPLICATE KEY UPDATE, the key value is the same
+Before UPDATE, new=INSERT ON DUPLICATE KEY UPDATE, updating the duplicate, old=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+After UPDATE, new=INSERT ON DUPLICATE KEY UPDATE, updating the duplicate, old=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+truncate t1;
+truncate t1_op_log;
+replace into t1 values (NULL, "REPLACE, inserting a new key");
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	REPLACE, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE, inserting a new key
+After INSERT, new=REPLACE, inserting a new key
+truncate t1_op_log;
+replace into t1 values (@id, "REPLACE, deleting the duplicate");
+select * from t1;
+id	operation
+1	REPLACE, deleting the duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE, deleting the duplicate
+Before DELETE, old=REPLACE, inserting a new key
+After DELETE, old=REPLACE, inserting a new key
+After INSERT, new=REPLACE, deleting the duplicate
+truncate t1;
+truncate t1_op_log;
+create table if not exists t1
+select NULL, "CREATE TABLE ... SELECT, inserting a new key";
+Warnings:
+Note	1050	Table 't1' already exists
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	CREATE TABLE ... SELECT, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=CREATE TABLE ... SELECT, inserting a new key
+After INSERT, new=CREATE TABLE ... SELECT, inserting a new key
+truncate t1_op_log;
+create table if not exists t1 replace
+select @id, "CREATE TABLE ... REPLACE SELECT, deleting a duplicate key";
+Warnings:
+Note	1050	Table 't1' already exists
+select * from t1;
+id	operation
+1	CREATE TABLE ... REPLACE SELECT, deleting a duplicate key
+select * from t1_op_log;
+operation
+Before INSERT, new=CREATE TABLE ... REPLACE SELECT, deleting a duplicate key
+Before DELETE, old=CREATE TABLE ... SELECT, inserting a new key
+After DELETE, old=CREATE TABLE ... SELECT, inserting a new key
+After INSERT, new=CREATE TABLE ... REPLACE SELECT, deleting a duplicate key
+truncate t1;
+truncate t1_op_log;
+insert into t1 (id, operation)
+select NULL, "INSERT ... SELECT, inserting a new key";
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	INSERT ... SELECT, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ... SELECT, inserting a new key
+After INSERT, new=INSERT ... SELECT, inserting a new key
+truncate t1_op_log;
+insert into t1 (id, operation)
+select @id,
+"INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate"
+on duplicate key update id=NULL,
+operation="INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate";
+select * from t1;
+id	operation
+0	INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate
+Before UPDATE, new=INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate, old=INSERT ... SELECT, inserting a new key
+After UPDATE, new=INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate, old=INSERT ... SELECT, inserting a new key
+truncate t1;
+truncate t1_op_log;
+replace into t1 (id, operation)
+select NULL, "REPLACE ... SELECT, inserting a new key";
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	REPLACE ... SELECT, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE ... SELECT, inserting a new key
+After INSERT, new=REPLACE ... SELECT, inserting a new key
+truncate t1_op_log;
+replace into t1 (id, operation)
+select @id, "REPLACE ... SELECT, deleting a duplicate";
+select * from t1;
+id	operation
+1	REPLACE ... SELECT, deleting a duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE ... SELECT, deleting a duplicate
+Before DELETE, old=REPLACE ... SELECT, inserting a new key
+After DELETE, old=REPLACE ... SELECT, inserting a new key
+After INSERT, new=REPLACE ... SELECT, deleting a duplicate
+truncate t1;
+truncate t1_op_log;
+insert into t1 (id, operation) values (1, "INSERT for multi-DELETE");
+insert into t2 (id) values (1);
+delete t1.*, t2.* from t1, t2 where t1.id=1;
+select * from t1;
+id	operation
+select * from t2;
+id
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT for multi-DELETE
+After INSERT, new=INSERT for multi-DELETE
+Before DELETE, old=INSERT for multi-DELETE
+After DELETE, old=INSERT for multi-DELETE
+truncate t1;
+truncate t2;
+truncate t1_op_log;
+insert into t1 (id, operation) values (1, "INSERT for multi-UPDATE");
+insert into t2 (id) values (1);
+update t1, t2 set t1.id=2, operation="multi-UPDATE" where t1.id=1;
+update t1, t2
+set t2.id=3, operation="multi-UPDATE, SET for t2, but the trigger is fired" where t1.id=2;
+select * from t1;
+id	operation
+2	multi-UPDATE, SET for t2, but the trigger is fired
+select * from t2;
+id
+3
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT for multi-UPDATE
+After INSERT, new=INSERT for multi-UPDATE
+Before UPDATE, new=multi-UPDATE, old=INSERT for multi-UPDATE
+After UPDATE, new=multi-UPDATE, old=INSERT for multi-UPDATE
+Before UPDATE, new=multi-UPDATE, SET for t2, but the trigger is fired, old=multi-UPDATE
+After UPDATE, new=multi-UPDATE, SET for t2, but the trigger is fired, old=multi-UPDATE
+truncate table t1;
+truncate table t2;
+truncate table t1_op_log;
+
+Now do the same but use a view instead of the base table.
+
+insert into v1 (operation) values ("INSERT");
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	INSERT
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT
+After INSERT, new=INSERT
+truncate t1_op_log;
+update v1 set operation="UPDATE" where id=@id;
+select * from t1;
+id	operation
+1	UPDATE
+select * from t1_op_log;
+operation
+Before UPDATE, new=UPDATE, old=INSERT
+After UPDATE, new=UPDATE, old=INSERT
+truncate t1_op_log;
+delete from v1 where id=@id;
+select * from t1;
+id	operation
+select * from t1_op_log;
+operation
+Before DELETE, old=UPDATE
+After DELETE, old=UPDATE
+truncate t1;
+truncate t1_op_log;
+insert into v1 (id, operation) values
+(NULL, "INSERT ON DUPLICATE KEY UPDATE, inserting a new key")
+on duplicate key update id=NULL, operation="Should never happen";
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+After INSERT, new=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+truncate t1_op_log;
+insert into v1 (id, operation) values
+(@id, "INSERT ON DUPLICATE KEY UPDATE, the key value is the same")
+on duplicate key update id=NULL,
+operation="INSERT ON DUPLICATE KEY UPDATE, updating the duplicate";
+select * from t1;
+id	operation
+0	INSERT ON DUPLICATE KEY UPDATE, updating the duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ON DUPLICATE KEY UPDATE, the key value is the same
+Before UPDATE, new=INSERT ON DUPLICATE KEY UPDATE, updating the duplicate, old=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+After UPDATE, new=INSERT ON DUPLICATE KEY UPDATE, updating the duplicate, old=INSERT ON DUPLICATE KEY UPDATE, inserting a new key
+truncate t1;
+truncate t1_op_log;
+replace into v1 values (NULL, "REPLACE, inserting a new key");
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	REPLACE, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE, inserting a new key
+After INSERT, new=REPLACE, inserting a new key
+truncate t1_op_log;
+replace into v1 values (@id, "REPLACE, deleting the duplicate");
+select * from t1;
+id	operation
+1	REPLACE, deleting the duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE, deleting the duplicate
+Before DELETE, old=REPLACE, inserting a new key
+After DELETE, old=REPLACE, inserting a new key
+After INSERT, new=REPLACE, deleting the duplicate
+truncate t1;
+truncate t1_op_log;
+create table if not exists v1
+select NULL, "CREATE TABLE ... SELECT, inserting a new key";
+Warnings:
+Note	1050	Table 'v1' already exists
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	CREATE TABLE ... SELECT, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=CREATE TABLE ... SELECT, inserting a new key
+After INSERT, new=CREATE TABLE ... SELECT, inserting a new key
+truncate t1_op_log;
+create table if not exists v1 replace
+select @id, "CREATE TABLE ... REPLACE SELECT, deleting a duplicate key";
+Warnings:
+Note	1050	Table 'v1' already exists
+select * from t1;
+id	operation
+1	CREATE TABLE ... REPLACE SELECT, deleting a duplicate key
+select * from t1_op_log;
+operation
+Before INSERT, new=CREATE TABLE ... REPLACE SELECT, deleting a duplicate key
+Before DELETE, old=CREATE TABLE ... SELECT, inserting a new key
+After DELETE, old=CREATE TABLE ... SELECT, inserting a new key
+After INSERT, new=CREATE TABLE ... REPLACE SELECT, deleting a duplicate key
+truncate t1;
+truncate t1_op_log;
+insert into v1 (id, operation)
+select NULL, "INSERT ... SELECT, inserting a new key";
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	INSERT ... SELECT, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ... SELECT, inserting a new key
+After INSERT, new=INSERT ... SELECT, inserting a new key
+truncate t1_op_log;
+insert into v1 (id, operation)
+select @id,
+"INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate"
+on duplicate key update id=NULL,
+operation="INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate";
+select * from t1;
+id	operation
+0	INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate
+Before UPDATE, new=INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate, old=INSERT ... SELECT, inserting a new key
+After UPDATE, new=INSERT ... SELECT ... ON DUPLICATE KEY UPDATE, updating a duplicate, old=INSERT ... SELECT, inserting a new key
+truncate t1;
+truncate t1_op_log;
+replace into v1 (id, operation)
+select NULL, "REPLACE ... SELECT, inserting a new key";
+set @id=last_insert_id();
+select * from t1;
+id	operation
+1	REPLACE ... SELECT, inserting a new key
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE ... SELECT, inserting a new key
+After INSERT, new=REPLACE ... SELECT, inserting a new key
+truncate t1_op_log;
+replace into v1 (id, operation)
+select @id, "REPLACE ... SELECT, deleting a duplicate";
+select * from t1;
+id	operation
+1	REPLACE ... SELECT, deleting a duplicate
+select * from t1_op_log;
+operation
+Before INSERT, new=REPLACE ... SELECT, deleting a duplicate
+Before DELETE, old=REPLACE ... SELECT, inserting a new key
+After DELETE, old=REPLACE ... SELECT, inserting a new key
+After INSERT, new=REPLACE ... SELECT, deleting a duplicate
+truncate t1;
+truncate t1_op_log;
+insert into v1 (id, operation) values (1, "INSERT for multi-DELETE");
+insert into t2 (id) values (1);
+delete v1.*, t2.* from v1, t2 where v1.id=1;
+select * from t1;
+id	operation
+select * from t2;
+id
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT for multi-DELETE
+After INSERT, new=INSERT for multi-DELETE
+Before DELETE, old=INSERT for multi-DELETE
+After DELETE, old=INSERT for multi-DELETE
+truncate t1;
+truncate t2;
+truncate t1_op_log;
+insert into v1 (id, operation) values (1, "INSERT for multi-UPDATE");
+insert into t2 (id) values (1);
+update v1, t2 set v1.id=2, operation="multi-UPDATE" where v1.id=1;
+update v1, t2
+set t2.id=3, operation="multi-UPDATE, SET for t2, but the trigger is fired" where v1.id=2;
+select * from t1;
+id	operation
+2	multi-UPDATE, SET for t2, but the trigger is fired
+select * from t2;
+id
+3
+select * from t1_op_log;
+operation
+Before INSERT, new=INSERT for multi-UPDATE
+After INSERT, new=INSERT for multi-UPDATE
+Before UPDATE, new=multi-UPDATE, old=INSERT for multi-UPDATE
+After UPDATE, new=multi-UPDATE, old=INSERT for multi-UPDATE
+Before UPDATE, new=multi-UPDATE, SET for t2, but the trigger is fired, old=multi-UPDATE
+After UPDATE, new=multi-UPDATE, SET for t2, but the trigger is fired, old=multi-UPDATE
+drop view v1;
+drop table t1, t2, t1_op_log;
 End of 5.0 tests