Fix for BUG#9412: Triggers: should have trigger privilege.

Implement table-level TRIGGER privilege to control access to triggers.
Before this path global SUPER privilege was used for this purpose, that
was the big security problem.

In details, before this patch SUPER privilege was required:
  - for the user at CREATE TRIGGER time to create a new trigger;
  - for the user at DROP TRIGGER time to drop the existing trigger;
  - for the definer at trigger activation time to execute the trigger (if the
    definer loses SUPER privilege, all its triggers become unavailable);

This patch changes the behaviour in the following way:
  - TRIGGER privilege on the subject table for trigger is required:
    - for the user at CREATE TRIGGER time to create a new trigger;
    - for the user at DROP TRIGGER time to drop the existing trigger;
    - for the definer at trigger activation time to execute the trigger
      (if the definer loses TRIGGER privilege on the subject table, all its
      triggers on this table become unavailable).
  - SUPER privilege is still required:
    - for the user at CREATE TRIGGER time to explicitly set the trigger
      definer to the user other than CURRENT_USER().

When the server works with database of the previous version (w/o TRIGGER
privilege), or if the database is being upgraded from the previous versions,
TRIGGER privilege is granted to whose users, who have CREATE privilege.


mysql-test/r/grant.result:
  Updated the result file after adding TRIGGER privilege.
mysql-test/r/information_schema.result:
  Updated the result file after adding TRIGGER privilege.
mysql-test/r/lowercase_table_grant.result:
  Updated the result file after adding TRIGGER privilege.
mysql-test/r/ps.result:
  Updated the result file after adding TRIGGER privilege.
mysql-test/r/sp.result:
  Updated the result file after adding TRIGGER privilege.
mysql-test/r/trigger-compat.result:
  Updated the result file after adding TRIGGER privilege.
mysql-test/r/trigger-grant.result:
  Updated the result file after adding TRIGGER privilege.
mysql-test/t/trigger-compat.test:
  Grant table-level TRIGGER privilege instead of global SUPER one.
mysql-test/t/trigger-grant.test:
  1. Grant table-level TRIGGER privilege instead of global SUPER one.
  2. Updated the test case to check that SUPER is required to specify
  the user other than the current as a definer.
scripts/mysql_create_system_tables.sh:
  Added TRIGGER privilege.
scripts/mysql_fix_privilege_tables.sql:
  Added TRIGGER privilege.
sql/sql_acl.cc:
  Added TRIGGER privilege.
sql/sql_acl.h:
  Added TRIGGER privilege.
sql/sql_show.cc:
  Added TRIGGER privilege.
sql/sql_trigger.cc:
  Check TRIGGER privilege instead of SUPER.
sql/sql_yacc.yy:
  Added TRIGGER privilege.

7 files changed, 82 insertions, 24 deletions

diff --git a/mysql-test/r/grant.result b/mysql-test/r/grant.result
index f62c86e6b62..45ab83a0cfc 100644
--- a/mysql-test/r/grant.result
+++ b/mysql-test/r/grant.result
@@ -11,8 +11,8 @@ GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost' REQUIRE CIPHER 'EDH-RSA-DES-CBC3
 GRANT SELECT ON `mysqltest`.* TO 'mysqltest_1'@'localhost'
 grant delete on mysqltest.* to mysqltest_1@localhost;
 select * from mysql.user where user="mysqltest_1";
-Host	User	Password	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Reload_priv	Shutdown_priv	Process_priv	File_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Show_db_priv	Super_priv	Create_tmp_table_priv	Lock_tables_priv	Execute_priv	Repl_slave_priv	Repl_client_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Create_user_priv	Event_priv	ssl_type	ssl_cipher	x509_issuer	x509_subject	max_questions	max_updates	max_connections	max_user_connections
-localhost	mysqltest_1		N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	SPECIFIED	EDH-RSA-DES-CBC3-SHA			0	0	0	0
+Host	User	Password	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Reload_priv	Shutdown_priv	Process_priv	File_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Show_db_priv	Super_priv	Create_tmp_table_priv	Lock_tables_priv	Execute_priv	Repl_slave_priv	Repl_client_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Create_user_priv	Event_priv	Trigger_priv	ssl_type	ssl_cipher	x509_issuer	x509_subject	max_questions	max_updates	max_connections	max_user_connections
+localhost	mysqltest_1		N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	SPECIFIED	EDH-RSA-DES-CBC3-SHA			0	0	0	0
 show grants for mysqltest_1@localhost;
 Grants for mysqltest_1@localhost
 GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost' REQUIRE CIPHER 'EDH-RSA-DES-CBC3-SHA'
@@ -42,15 +42,15 @@ delete from mysql.user where user='mysqltest_1';
 flush privileges;
 grant usage on *.* to mysqltest_1@localhost with max_queries_per_hour 10;
 select * from mysql.user where user="mysqltest_1";
-Host	User	Password	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Reload_priv	Shutdown_priv	Process_priv	File_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Show_db_priv	Super_priv	Create_tmp_table_priv	Lock_tables_priv	Execute_priv	Repl_slave_priv	Repl_client_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Create_user_priv	Event_priv	ssl_type	ssl_cipher	x509_issuer	x509_subject	max_questions	max_updates	max_connections	max_user_connections
-localhost	mysqltest_1		N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N					10	0	0	0
+Host	User	Password	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Reload_priv	Shutdown_priv	Process_priv	File_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Show_db_priv	Super_priv	Create_tmp_table_priv	Lock_tables_priv	Execute_priv	Repl_slave_priv	Repl_client_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Create_user_priv	Event_priv	Trigger_priv	ssl_type	ssl_cipher	x509_issuer	x509_subject	max_questions	max_updates	max_connections	max_user_connections
+localhost	mysqltest_1		N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N					10	0	0	0
 show grants for mysqltest_1@localhost;
 Grants for mysqltest_1@localhost
 GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost' WITH MAX_QUERIES_PER_HOUR 10
 grant usage on *.* to mysqltest_1@localhost with max_updates_per_hour 20 max_connections_per_hour 30;
 select * from mysql.user where user="mysqltest_1";
-Host	User	Password	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Reload_priv	Shutdown_priv	Process_priv	File_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Show_db_priv	Super_priv	Create_tmp_table_priv	Lock_tables_priv	Execute_priv	Repl_slave_priv	Repl_client_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Create_user_priv	Event_priv	ssl_type	ssl_cipher	x509_issuer	x509_subject	max_questions	max_updates	max_connections	max_user_connections
-localhost	mysqltest_1		N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N					10	20	30	0
+Host	User	Password	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Reload_priv	Shutdown_priv	Process_priv	File_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Show_db_priv	Super_priv	Create_tmp_table_priv	Lock_tables_priv	Execute_priv	Repl_slave_priv	Repl_client_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Create_user_priv	Event_priv	Trigger_priv	ssl_type	ssl_cipher	x509_issuer	x509_subject	max_questions	max_updates	max_connections	max_user_connections
+localhost	mysqltest_1		N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N					10	20	30	0
 show grants for mysqltest_1@localhost;
 Grants for mysqltest_1@localhost
 GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost' WITH MAX_QUERIES_PER_HOUR 10 MAX_UPDATES_PER_HOUR 20 MAX_CONNECTIONS_PER_HOUR 30
@@ -85,7 +85,7 @@ revoke LOCK TABLES, ALTER on mysqltest.* from mysqltest_1@localhost;
 show grants for mysqltest_1@localhost;
 Grants for mysqltest_1@localhost
 GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost'
-GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, CREATE TEMPORARY TABLES, EXECUTE, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, EVENT ON `mysqltest`.* TO 'mysqltest_1'@'localhost' WITH GRANT OPTION
+GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, CREATE TEMPORARY TABLES, EXECUTE, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, EVENT, TRIGGER ON `mysqltest`.* TO 'mysqltest_1'@'localhost' WITH GRANT OPTION
 revoke all privileges on mysqltest.* from mysqltest_1@localhost;
 delete from mysql.user where user='mysqltest_1';
 flush privileges;
@@ -465,6 +465,7 @@ Show databases	Server Admin	To see all databases with SHOW DATABASES
 Show view	Tables	To see views with SHOW CREATE VIEW
 Shutdown	Server Admin	To shut down the server
 Super	Server Admin	To use KILL thread, SET GLOBAL, CHANGE MASTER, etc.
+Trigger	Tables	To use triggers
 Update	Tables	To update existing rows
 Usage	Server Admin	No privileges - allow connect only
 create database mysqltest;
@@ -491,8 +492,8 @@ SELECT TABLE_SCHEMA, TABLE_NAME, GROUP_CONCAT(PRIVILEGE_TYPE ORDER BY
 PRIVILEGE_TYPE SEPARATOR ', ') AS PRIVILEGES FROM TABLE_PRIVILEGES WHERE GRANTEE
 = '\'dummy\'@\'localhost\'' GROUP BY TABLE_SCHEMA, TABLE_NAME;
 TABLE_SCHEMA	TABLE_NAME	PRIVILEGES
-mysqltest	dummytable	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, UPDATE
-mysqltest	dummyview	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, UPDATE
+mysqltest	dummytable	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, TRIGGER, UPDATE
+mysqltest	dummyview	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, TRIGGER, UPDATE
 FLUSH PRIVILEGES;
 SHOW GRANTS FOR dummy@localhost;
 Grants for dummy@localhost
@@ -503,8 +504,8 @@ SELECT TABLE_SCHEMA, TABLE_NAME, GROUP_CONCAT(PRIVILEGE_TYPE ORDER BY
 PRIVILEGE_TYPE SEPARATOR ', ') AS PRIVILEGES FROM TABLE_PRIVILEGES WHERE GRANTEE
 = '\'dummy\'@\'localhost\'' GROUP BY TABLE_SCHEMA, TABLE_NAME;
 TABLE_SCHEMA	TABLE_NAME	PRIVILEGES
-mysqltest	dummytable	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, UPDATE
-mysqltest	dummyview	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, UPDATE
+mysqltest	dummytable	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, TRIGGER, UPDATE
+mysqltest	dummyview	ALTER, CREATE, CREATE VIEW, DELETE, DROP, INDEX, INSERT, REFERENCES, SELECT, SHOW VIEW, TRIGGER, UPDATE
 SHOW FIELDS FROM mysql.tables_priv;
 Field	Type	Null	Key	Default	Extra
 Host	char(60)	NO	PRI		
@@ -513,7 +514,7 @@ User	char(16)	NO	PRI
 Table_name	char(64)	NO	PRI		
 Grantor	char(77)	NO	MUL		
 Timestamp	timestamp	YES		CURRENT_TIMESTAMP	
-Table_priv	set('Select','Insert','Update','Delete','Create','Drop','Grant','References','Index','Alter','Create View','Show view')	NO			
+Table_priv	set('Select','Insert','Update','Delete','Create','Drop','Grant','References','Index','Alter','Create View','Show view','Trigger')	NO			
 Column_priv	set('Select','Insert','Update','References')	NO			
 use test;
 REVOKE ALL PRIVILEGES, GRANT OPTION FROM dummy@localhost;
@@ -594,7 +595,7 @@ delete from tables_priv where host = '' and user = 'mysqltest_1';
 flush privileges;
 set @user123="non-existent";
 select * from mysql.db where user=@user123;
-Host	Db	User	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Create_tmp_table_priv	Lock_tables_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Execute_priv	Event_priv
+Host	Db	User	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Create_tmp_table_priv	Lock_tables_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Execute_priv	Event_priv	Trigger_priv
 set names koi8r;
 create database ÂÄ;
 grant select on ÂÄ.* to root@localhost;
diff --git a/mysql-test/r/information_schema.result b/mysql-test/r/information_schema.result
index 40706fd9c55..ee7a3a797b6 100644
--- a/mysql-test/r/information_schema.result
+++ b/mysql-test/r/information_schema.result
@@ -406,6 +406,7 @@ GRANTEE	TABLE_CATALOG	TABLE_SCHEMA	PRIVILEGE_TYPE	IS_GRANTABLE
 'mysqltest_1'@'localhost'	NULL	test	CREATE ROUTINE	YES
 'mysqltest_1'@'localhost'	NULL	test	ALTER ROUTINE	YES
 'mysqltest_1'@'localhost'	NULL	test	EVENT	YES
+'mysqltest_1'@'localhost'	NULL	test	TRIGGER	YES
 select * from information_schema.TABLE_PRIVILEGES where grantee like '%mysqltest_1%';
 GRANTEE	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PRIVILEGE_TYPE	IS_GRANTABLE
 'mysqltest_1'@'localhost'	NULL	test	t1	SELECT	NO
diff --git a/mysql-test/r/lowercase_table_grant.result b/mysql-test/r/lowercase_table_grant.result
index df7e8066e72..afb54f8c472 100644
--- a/mysql-test/r/lowercase_table_grant.result
+++ b/mysql-test/r/lowercase_table_grant.result
@@ -6,8 +6,8 @@ Grants for mysqltest_1@localhost
 GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost'
 GRANT ALL PRIVILEGES ON `mysqltest`.* TO 'mysqltest_1'@'localhost'
 select * from db where user = 'mysqltest_1';
-Host	Db	User	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Create_tmp_table_priv	Lock_tables_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Execute_priv	Event_priv
-localhost	mysqltest	mysqltest_1	Y	Y	Y	Y	Y	Y	N	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y
+Host	Db	User	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Create_tmp_table_priv	Lock_tables_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Execute_priv	Event_priv	Trigger_priv
+localhost	mysqltest	mysqltest_1	Y	Y	Y	Y	Y	Y	N	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y
 update db set db = 'MYSQLtest' where db = 'mysqltest' and user = 'mysqltest_1' and host = 'localhost';
 flush privileges;
 show grants for mysqltest_1@localhost;
@@ -15,8 +15,8 @@ Grants for mysqltest_1@localhost
 GRANT USAGE ON *.* TO 'mysqltest_1'@'localhost'
 GRANT ALL PRIVILEGES ON `mysqltest`.* TO 'mysqltest_1'@'localhost'
 select * from db where user = 'mysqltest_1';
-Host	Db	User	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Create_tmp_table_priv	Lock_tables_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Execute_priv	Event_priv
-localhost	MYSQLtest	mysqltest_1	Y	Y	Y	Y	Y	Y	N	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y
+Host	Db	User	Select_priv	Insert_priv	Update_priv	Delete_priv	Create_priv	Drop_priv	Grant_priv	References_priv	Index_priv	Alter_priv	Create_tmp_table_priv	Lock_tables_priv	Create_view_priv	Show_view_priv	Create_routine_priv	Alter_routine_priv	Execute_priv	Event_priv	Trigger_priv
+localhost	MYSQLtest	mysqltest_1	Y	Y	Y	Y	Y	Y	N	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y	Y
 delete from db where db = 'MYSQLtest' and user = 'mysqltest_1' and host = 'localhost';
 flush privileges;
 drop user mysqltest_1@localhost;
diff --git a/mysql-test/r/ps.result b/mysql-test/r/ps.result
index 572346a1766..5c0a13fe640 100644
--- a/mysql-test/r/ps.result
+++ b/mysql-test/r/ps.result
@@ -533,13 +533,13 @@ SET @aux= "SELECT COUNT(*)
 prepare my_stmt from @aux;
 execute my_stmt;
 COUNT(*)
-38
+39
 execute my_stmt;
 COUNT(*)
-38
+39
 execute my_stmt;
 COUNT(*)
-38
+39
 deallocate prepare my_stmt;
 drop procedure if exists p1|
 drop table if exists t1|
diff --git a/mysql-test/r/sp.result b/mysql-test/r/sp.result
index acd32564f51..b9af0a8b075 100644
--- a/mysql-test/r/sp.result
+++ b/mysql-test/r/sp.result
@@ -2197,6 +2197,7 @@ Show databases	Server Admin	To see all databases with SHOW DATABASES
 Show view	Tables	To see views with SHOW CREATE VIEW
 Shutdown	Server Admin	To shut down the server
 Super	Server Admin	To use KILL thread, SET GLOBAL, CHANGE MASTER, etc.
+Trigger	Tables	To use triggers
 Update	Tables	To update existing rows
 Usage	Server Admin	No privileges - allow connect only
 Variable_name	Value
@@ -2250,6 +2251,7 @@ Show databases	Server Admin	To see all databases with SHOW DATABASES
 Show view	Tables	To see views with SHOW CREATE VIEW
 Shutdown	Server Admin	To shut down the server
 Super	Server Admin	To use KILL thread, SET GLOBAL, CHANGE MASTER, etc.
+Trigger	Tables	To use triggers
 Update	Tables	To update existing rows
 Usage	Server Admin	No privileges - allow connect only
 Variable_name	Value
diff --git a/mysql-test/r/trigger-compat.result b/mysql-test/r/trigger-compat.result
index 7721a55449b..71682376ab5 100644
--- a/mysql-test/r/trigger-compat.result
+++ b/mysql-test/r/trigger-compat.result
@@ -7,8 +7,7 @@ DROP DATABASE IF EXISTS mysqltest_db1;
 CREATE DATABASE mysqltest_db1;
 CREATE USER mysqltest_dfn@localhost;
 CREATE USER mysqltest_inv@localhost;
-GRANT SUPER ON *.* TO mysqltest_dfn@localhost;
-GRANT CREATE ON mysqltest_db1.* TO mysqltest_dfn@localhost;
+GRANT CREATE, TRIGGER ON mysqltest_db1.* TO mysqltest_dfn@localhost;
 
 ---> connection: wl2818_definer_con
 CREATE TABLE t1(num_value INT);
diff --git a/mysql-test/r/trigger-grant.result b/mysql-test/r/trigger-grant.result
index 858cab7a04a..60875d283c1 100644
--- a/mysql-test/r/trigger-grant.result
+++ b/mysql-test/r/trigger-grant.result
@@ -7,12 +7,57 @@ DROP DATABASE IF EXISTS mysqltest_db1;
 CREATE DATABASE mysqltest_db1;
 CREATE USER mysqltest_dfn@localhost;
 CREATE USER mysqltest_inv@localhost;
-GRANT SUPER ON *.* TO mysqltest_dfn@localhost;
 GRANT CREATE ON mysqltest_db1.* TO mysqltest_dfn@localhost;
 
 ---> connection: wl2818_definer_con
 CREATE TABLE t1(num_value INT);
 CREATE TABLE t2(user_str TEXT);
+
+---> connection: default
+GRANT INSERT, DELETE ON mysqltest_db1.t1 TO mysqltest_dfn@localhost;
+GRANT INSERT, DELETE ON mysqltest_db1.t2 TO mysqltest_dfn@localhost;
+
+---> connection: default
+GRANT SUPER ON *.* TO mysqltest_dfn@localhost;
+
+---> connection: wl2818_definer_con
+CREATE TRIGGER trg1 AFTER INSERT ON t1
+FOR EACH ROW
+INSERT INTO t2 VALUES(CURRENT_USER());
+ERROR 42000: TRIGGER command denied to user 'mysqltest_dfn'@'localhost' for table 't1'
+
+---> connection: default
+GRANT TRIGGER ON mysqltest_db1.t1 TO mysqltest_dfn@localhost;
+
+---> connection: wl2818_definer_con
+CREATE TRIGGER trg1 AFTER INSERT ON t1
+FOR EACH ROW
+INSERT INTO t2 VALUES(CURRENT_USER());
+
+---> connection: default
+REVOKE TRIGGER ON mysqltest_db1.t1 FROM mysqltest_dfn@localhost;
+
+---> connection: wl2818_definer_con
+DROP TRIGGER trg1;
+ERROR 42000: TRIGGER command denied to user 'mysqltest_dfn'@'localhost' for table 't1'
+
+---> connection: wl2818_definer_con
+INSERT INTO t1 VALUES(0);
+ERROR 42000: TRIGGER command denied to user 'mysqltest_dfn'@'localhost' for table 't1'
+
+---> connection: default
+GRANT TRIGGER ON mysqltest_db1.t1 TO mysqltest_dfn@localhost;
+
+---> connection: wl2818_definer_con
+INSERT INTO t1 VALUES(0);
+DROP TRIGGER trg1;
+DELETE FROM t1;
+DELETE FROM t2;
+
+---> connection: default
+REVOKE SUPER ON *.* FROM mysqltest_dfn@localhost;
+
+---> connection: wl2818_definer_con
 CREATE TRIGGER trg1 AFTER INSERT ON t1
 FOR EACH ROW
 INSERT INTO t2 VALUES(CURRENT_USER());
@@ -175,6 +220,17 @@ CREATE DEFINER='mysqltest_inv'@'localhost'
   TRIGGER trg1 BEFORE INSERT ON t1
 FOR EACH ROW
 SET @new_sum = 0;
+ERROR 42000: Access denied; you need the SUPER privilege for this operation
+
+---> connection: default
+use mysqltest_db1;
+GRANT SUPER ON *.* TO mysqltest_dfn@localhost;
+
+---> connection: wl2818_definer_con
+CREATE DEFINER='mysqltest_inv'@'localhost'
+  TRIGGER trg1 BEFORE INSERT ON t1
+FOR EACH ROW
+SET @new_sum = 0;
 CREATE DEFINER='mysqltest_nonexs'@'localhost'
   TRIGGER trg2 AFTER INSERT ON t1
 FOR EACH ROW
@@ -182,7 +238,6 @@ SET @new_sum = 0;
 Warnings:
 Note	1449	There is no 'mysqltest_nonexs'@'localhost' registered
 INSERT INTO t1 VALUES(6);
-ERROR 42000: Access denied; you need the SUPER privilege for this operation
 SHOW TRIGGERS;
 Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer
 trg1	INSERT	t1	SET @new_sum = 0	BEFORE	NULL		mysqltest_inv@localhost