SHOW TABLES FROM information_schema LIKE 'TRIGGERS';
Tables_in_information_schema (TRIGGERS)
TRIGGERS
#######################################################################
# Testcase 3.2.1.1: INFORMATION_SCHEMA tables can be queried via SELECT
#######################################################################
DROP VIEW      IF EXISTS test.v1;
DROP PROCEDURE IF EXISTS test.p1;
DROP FUNCTION  IF EXISTS test.f1;
CREATE VIEW test.v1 AS     SELECT * FROM information_schema.TRIGGERS;
CREATE PROCEDURE test.p1() SELECT * FROM information_schema.TRIGGERS;
CREATE FUNCTION test.f1() returns BIGINT
BEGIN
DECLARE counter BIGINT DEFAULT NULL;
SELECT COUNT(*) INTO counter FROM information_schema.TRIGGERS;
RETURN counter;
END//
# Attention: The printing of the next result sets is disabled.
SELECT * FROM information_schema.TRIGGERS;
SELECT * FROM test.v1;
CALL test.p1;
SELECT test.f1();
DROP VIEW test.v1;
DROP PROCEDURE test.p1;
DROP FUNCTION test.f1;
#########################################################################
# Testcase 3.2.12.1: INFORMATION_SCHEMA.TRIGGERS layout
#########################################################################
DESCRIBE          information_schema.TRIGGERS;
Field	Type	Null	Key	Default	Extra
TRIGGER_CATALOG	varchar(512)	YES		NULL	
TRIGGER_SCHEMA	varchar(64)	NO			
TRIGGER_NAME	varchar(64)	NO			
EVENT_MANIPULATION	varchar(6)	NO			
EVENT_OBJECT_CATALOG	varchar(512)	YES		NULL	
EVENT_OBJECT_SCHEMA	varchar(64)	NO			
EVENT_OBJECT_TABLE	varchar(64)	NO			
ACTION_ORDER	bigint(4)	NO		0	
ACTION_CONDITION	longtext	YES		NULL	
ACTION_STATEMENT	longtext	NO		NULL	
ACTION_ORIENTATION	varchar(9)	NO			
ACTION_TIMING	varchar(6)	NO			
ACTION_REFERENCE_OLD_TABLE	varchar(64)	YES		NULL	
ACTION_REFERENCE_NEW_TABLE	varchar(64)	YES		NULL	
ACTION_REFERENCE_OLD_ROW	varchar(3)	NO			
ACTION_REFERENCE_NEW_ROW	varchar(3)	NO			
CREATED	datetime	YES		NULL	
SQL_MODE	varchar(8192)	NO			
DEFINER	varchar(77)	NO			
CHARACTER_SET_CLIENT	varchar(32)	NO			
COLLATION_CONNECTION	varchar(32)	NO			
DATABASE_COLLATION	varchar(32)	NO			
SHOW CREATE TABLE information_schema.TRIGGERS;
Table	Create Table
TRIGGERS	CREATE TEMPORARY TABLE `TRIGGERS` (
  `TRIGGER_CATALOG` varchar(512) DEFAULT NULL,
  `TRIGGER_SCHEMA` varchar(64) NOT NULL DEFAULT '',
  `TRIGGER_NAME` varchar(64) NOT NULL DEFAULT '',
  `EVENT_MANIPULATION` varchar(6) NOT NULL DEFAULT '',
  `EVENT_OBJECT_CATALOG` varchar(512) DEFAULT NULL,
  `EVENT_OBJECT_SCHEMA` varchar(64) NOT NULL DEFAULT '',
  `EVENT_OBJECT_TABLE` varchar(64) NOT NULL DEFAULT '',
  `ACTION_ORDER` bigint(4) NOT NULL DEFAULT '0',
  `ACTION_CONDITION` longtext,
  `ACTION_STATEMENT` longtext NOT NULL,
  `ACTION_ORIENTATION` varchar(9) NOT NULL DEFAULT '',
  `ACTION_TIMING` varchar(6) NOT NULL DEFAULT '',
  `ACTION_REFERENCE_OLD_TABLE` varchar(64) DEFAULT NULL,
  `ACTION_REFERENCE_NEW_TABLE` varchar(64) DEFAULT NULL,
  `ACTION_REFERENCE_OLD_ROW` varchar(3) NOT NULL DEFAULT '',
  `ACTION_REFERENCE_NEW_ROW` varchar(3) NOT NULL DEFAULT '',
  `CREATED` datetime DEFAULT NULL,
  `SQL_MODE` varchar(8192) NOT NULL DEFAULT '',
  `DEFINER` varchar(77) NOT NULL DEFAULT '',
  `CHARACTER_SET_CLIENT` varchar(32) NOT NULL DEFAULT '',
  `COLLATION_CONNECTION` varchar(32) NOT NULL DEFAULT '',
  `DATABASE_COLLATION` varchar(32) NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=utf8
SHOW COLUMNS FROM information_schema.TRIGGERS;
Field	Type	Null	Key	Default	Extra
TRIGGER_CATALOG	varchar(512)	YES		NULL	
TRIGGER_SCHEMA	varchar(64)	NO			
TRIGGER_NAME	varchar(64)	NO			
EVENT_MANIPULATION	varchar(6)	NO			
EVENT_OBJECT_CATALOG	varchar(512)	YES		NULL	
EVENT_OBJECT_SCHEMA	varchar(64)	NO			
EVENT_OBJECT_TABLE	varchar(64)	NO			
ACTION_ORDER	bigint(4)	NO		0	
ACTION_CONDITION	longtext	YES		NULL	
ACTION_STATEMENT	longtext	NO		NULL	
ACTION_ORIENTATION	varchar(9)	NO			
ACTION_TIMING	varchar(6)	NO			
ACTION_REFERENCE_OLD_TABLE	varchar(64)	YES		NULL	
ACTION_REFERENCE_NEW_TABLE	varchar(64)	YES		NULL	
ACTION_REFERENCE_OLD_ROW	varchar(3)	NO			
ACTION_REFERENCE_NEW_ROW	varchar(3)	NO			
CREATED	datetime	YES		NULL	
SQL_MODE	varchar(8192)	NO			
DEFINER	varchar(77)	NO			
CHARACTER_SET_CLIENT	varchar(32)	NO			
COLLATION_CONNECTION	varchar(32)	NO			
DATABASE_COLLATION	varchar(32)	NO			
SELECT * FROM information_schema.triggers
WHERE trigger_catalog IS NOT NULL OR event_object_catalog IS NOT NULL
OR action_condition IS NOT NULL OR action_reference_old_table IS NOT NULL
OR action_reference_new_table IS NOT NULL;
TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
##################################################################################
# Testcase 3.2.18.2 + 3.2.18.3: INFORMATION_SCHEMA.TRIGGERS accessible information
##################################################################################
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
DROP   USER 'testuser1'@'localhost';
CREATE USER 'testuser1'@'localhost';
DROP   USER 'testuser2'@'localhost';
CREATE USER 'testuser2'@'localhost';
DROP   USER 'testuser3'@'localhost';
CREATE USER 'testuser3'@'localhost';
DROP   USER 'testuser4'@'localhost';
CREATE USER 'testuser4'@'localhost';
GRANT TRIGGER ON *.* TO 'testuser1'@'localhost';
GRANT TRIGGER ON *.* TO 'testuser3'@'localhost';
GRANT TRIGGER ON *.* TO 'testuser4'@'localhost';
GRANT ALL ON db_datadict.* TO 'testuser1'@'localhost' WITH GRANT OPTION;
# Establish connection testuser1 (user=testuser1)
CREATE TABLE db_datadict.t1 (f1 INT, f2 INT, f3 INT)
ENGINE = <engine_type>;
CREATE TRIGGER trg1 BEFORE INSERT
ON db_datadict.t1 FOR EACH ROW SET @test_before = 2, new.f1 = @test_before;
GRANT ALL ON db_datadict.t1 TO 'testuser2'@'localhost';
REVOKE TRIGGER ON db_datadict.t1 FROM 'testuser2'@'localhost';
GRANT SELECT ON db_datadict.t1 TO 'testuser3'@'localhost';
SELECT * FROM information_schema.triggers
WHERE trigger_name = 'trg1';
TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
NULL	db_datadict	trg1	INSERT	NULL	db_datadict	t1	0	NULL	SET @test_before = 2, new.f1 = @test_before	ROW	BEFORE	NULL	NULL	OLD	NEW	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
SHOW TRIGGERS FROM db_datadict;
Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
trg1	INSERT	t1	SET @test_before = 2, new.f1 = @test_before	BEFORE	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
# Establish connection testuser2 (user=testuser2)
SHOW GRANTS FOR 'testuser2'@'localhost';
Grants for testuser2@localhost
GRANT USAGE ON *.* TO 'testuser2'@'localhost'
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, ALTER, CREATE VIEW, SHOW VIEW ON `db_datadict`.`t1` TO 'testuser2'@'localhost'
# No TRIGGER Privilege --> no result for query
SELECT * FROM information_schema.triggers
WHERE trigger_name = 'trg1';
TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
SHOW TRIGGERS FROM db_datadict;
Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
# Establish connection testuser3 (user=testuser3)
SHOW GRANTS FOR 'testuser3'@'localhost';
Grants for testuser3@localhost
GRANT TRIGGER ON *.* TO 'testuser3'@'localhost'
GRANT SELECT ON `db_datadict`.`t1` TO 'testuser3'@'localhost'
# TRIGGER Privilege + SELECT Privilege on t1 --> result for query
SELECT * FROM information_schema.triggers
WHERE trigger_name = 'trg1';
TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
NULL	db_datadict	trg1	INSERT	NULL	db_datadict	t1	0	NULL	SET @test_before = 2, new.f1 = @test_before	ROW	BEFORE	NULL	NULL	OLD	NEW	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
SHOW TRIGGERS FROM db_datadict;
Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
trg1	INSERT	t1	SET @test_before = 2, new.f1 = @test_before	BEFORE	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
# Establish connection testuser4 (user=testuser4)
SHOW GRANTS FOR 'testuser4'@'localhost';
Grants for testuser4@localhost
GRANT TRIGGER ON *.* TO 'testuser4'@'localhost'
# TRIGGER Privilege + no SELECT Privilege on t1 --> result for query
SELECT * FROM db_datadict.t1;
ERROR 42000: SELECT command denied to user 'testuser4'@'localhost' for table 't1'
DESC db_datadict.t1;
ERROR 42000: SELECT command denied to user 'testuser4'@'localhost' for table 't1'
SELECT * FROM information_schema.triggers
WHERE trigger_name = 'trg1';
TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
NULL	db_datadict	trg1	INSERT	NULL	db_datadict	t1	0	NULL	SET @test_before = 2, new.f1 = @test_before	ROW	BEFORE	NULL	NULL	OLD	NEW	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
SHOW TRIGGERS FROM db_datadict;
Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
trg1	INSERT	t1	SET @test_before = 2, new.f1 = @test_before	BEFORE	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
# Switch to connection default and close connections testuser1 - testuser4
SELECT * FROM information_schema.triggers
WHERE trigger_name = 'trg1';
TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
NULL	db_datadict	trg1	INSERT	NULL	db_datadict	t1	0	NULL	SET @test_before = 2, new.f1 = @test_before	ROW	BEFORE	NULL	NULL	OLD	NEW	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
SHOW TRIGGERS FROM db_datadict;
Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
trg1	INSERT	t1	SET @test_before = 2, new.f1 = @test_before	BEFORE	NULL		testuser1@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
DROP USER 'testuser1'@'localhost';
DROP USER 'testuser2'@'localhost';
DROP USER 'testuser3'@'localhost';
DROP USER 'testuser4'@'localhost';
DROP DATABASE db_datadict;
#########################################################################
# 3.2.1.13+3.2.1.14+3.2.1.15: INFORMATION_SCHEMA.TRIGGERS modifications
#########################################################################
########################################################################
# Testcases 3.2.1.3-3.2.1.5 + 3.2.1.8-3.2.1.12: INSERT/UPDATE/DELETE and
#           DDL on INFORMATION_SCHEMA tables are not supported
########################################################################
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
CREATE TABLE db_datadict.t1 (f1 BIGINT)
ENGINE = <engine_type>;
CREATE TRIGGER db_datadict.trg1 BEFORE INSERT
ON db_datadict.t1 FOR EACH ROW SET @test_before = 2, new.f1 = @test_before;
INSERT INTO information_schema.triggers
SELECT * FROM information_schema.triggers;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
UPDATE information_schema.triggers SET trigger_schema = 'test'
WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DELETE FROM information_schema.triggers WHERE trigger_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
TRUNCATE information_schema.triggers;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE INDEX my_idx_on_triggers ON information_schema.triggers(trigger_schema);
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.triggers DROP PRIMARY KEY;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.triggers ADD f1 INT;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE information_schema.triggers;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.triggers RENAME db_datadict.triggers;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.triggers RENAME information_schema.xtriggers;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP DATABASE db_datadict;