SHOW TABLES FROM information_schema LIKE 'VIEWS';
Tables_in_information_schema (VIEWS)
VIEWS
#######################################################################
# 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.VIEWS;
CREATE PROCEDURE test.p1() SELECT * FROM information_schema.VIEWS;
CREATE FUNCTION test.f1() returns BIGINT
BEGIN
DECLARE counter BIGINT DEFAULT NULL;
SELECT COUNT(*) INTO counter FROM information_schema.VIEWS;
RETURN counter;
END//
# Attention: The printing of the next result sets is disabled.
SELECT * FROM information_schema.VIEWS;
SELECT * FROM test.v1;
CALL test.p1;
SELECT test.f1();
DROP VIEW test.v1;
DROP PROCEDURE test.p1;
DROP FUNCTION test.f1;
#########################################################################
# Testcase 3.2.13.1: INFORMATION_SCHEMA.VIEWS layout
#########################################################################
DESCRIBE          information_schema.VIEWS;
Field	Type	Null	Key	Default	Extra
TABLE_CATALOG	varchar(64)	YES		NULL	
TABLE_SCHEMA	varchar(64)	YES		NULL	
TABLE_NAME	varchar(64)	YES		NULL	
VIEW_DEFINITION	longtext	YES		NULL	
CHECK_OPTION	enum('NONE','LOCAL','CASCADED')	YES		NULL	
IS_UPDATABLE	enum('NO','YES')	YES		NULL	
DEFINER	varchar(93)	YES		NULL	
SECURITY_TYPE	varchar(7)	YES		NULL	
CHARACTER_SET_CLIENT	varchar(64)	NO		NULL	
COLLATION_CONNECTION	varchar(64)	NO		NULL	
SHOW CREATE TABLE information_schema.VIEWS;
View	Create View	character_set_client	collation_connection
VIEWS	CREATE ALGORITHM=UNDEFINED DEFINER=`mysql.infoschema`@`localhost` SQL SECURITY DEFINER VIEW `information_schema`.`VIEWS` AS select (`cat`.`name` collate utf8_tolower_ci) AS `TABLE_CATALOG`,(`sch`.`name` collate utf8_tolower_ci) AS `TABLE_SCHEMA`,(`vw`.`name` collate utf8_tolower_ci) AS `TABLE_NAME`,if((can_access_view(`sch`.`name`,`vw`.`name`,`vw`.`view_definer`,`vw`.`options`) = TRUE),`vw`.`view_definition_utf8`,'') AS `VIEW_DEFINITION`,`vw`.`view_check_option` AS `CHECK_OPTION`,`vw`.`view_is_updatable` AS `IS_UPDATABLE`,`vw`.`view_definer` AS `DEFINER`,if((`vw`.`view_security_type` = 'DEFAULT'),'DEFINER',`vw`.`view_security_type`) AS `SECURITY_TYPE`,`cs`.`name` AS `CHARACTER_SET_CLIENT`,`conn_coll`.`name` AS `COLLATION_CONNECTION` from (((((`mysql`.`tables` `vw` join `mysql`.`schemata` `sch` on((`vw`.`schema_id` = `sch`.`id`))) join `mysql`.`catalogs` `cat` on((`cat`.`id` = `sch`.`catalog_id`))) join `mysql`.`collations` `conn_coll` on((`conn_coll`.`id` = `vw`.`view_connection_collation_id`))) join `mysql`.`collations` `client_coll` on((`client_coll`.`id` = `vw`.`view_client_collation_id`))) join `mysql`.`character_sets` `cs` on((`cs`.`id` = `client_coll`.`character_set_id`))) where (can_access_table(`sch`.`name`,`vw`.`name`) and (`vw`.`type` = 'VIEW'))	utf8	utf8_general_ci
SHOW COLUMNS FROM information_schema.VIEWS;
Field	Type	Null	Key	Default	Extra
TABLE_CATALOG	varchar(64)	YES		NULL	
TABLE_SCHEMA	varchar(64)	YES		NULL	
TABLE_NAME	varchar(64)	YES		NULL	
VIEW_DEFINITION	longtext	YES		NULL	
CHECK_OPTION	enum('NONE','LOCAL','CASCADED')	YES		NULL	
IS_UPDATABLE	enum('NO','YES')	YES		NULL	
DEFINER	varchar(93)	YES		NULL	
SECURITY_TYPE	varchar(7)	YES		NULL	
CHARACTER_SET_CLIENT	varchar(64)	NO		NULL	
COLLATION_CONNECTION	varchar(64)	NO		NULL	
SELECT table_catalog, table_schema, table_name
FROM information_schema.views WHERE table_catalog IS NOT NULL order by table_name;
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME
def	sys	host_summary
def	sys	host_summary_by_file_io
def	sys	host_summary_by_file_io_type
def	sys	host_summary_by_stages
def	sys	host_summary_by_statement_latency
def	sys	host_summary_by_statement_type
def	sys	innodb_buffer_stats_by_schema
def	sys	innodb_buffer_stats_by_table
def	sys	innodb_lock_waits
def	sys	io_by_thread_by_latency
def	sys	io_global_by_file_by_bytes
def	sys	io_global_by_file_by_latency
def	sys	io_global_by_wait_by_bytes
def	sys	io_global_by_wait_by_latency
def	sys	latest_file_io
def	sys	memory_by_host_by_current_bytes
def	sys	memory_by_thread_by_current_bytes
def	sys	memory_by_user_by_current_bytes
def	sys	memory_global_by_current_bytes
def	sys	memory_global_total
def	sys	metrics
def	sys	processlist
def	sys	ps_check_lost_instrumentation
def	sys	schema_auto_increment_columns
def	sys	schema_index_statistics
def	sys	schema_object_overview
def	sys	schema_redundant_indexes
def	sys	schema_table_lock_waits
def	sys	schema_table_statistics
def	sys	schema_table_statistics_with_buffer
def	sys	schema_tables_with_full_table_scans
def	sys	schema_unused_indexes
def	sys	session
def	sys	session_ssl_status
def	sys	statement_analysis
def	sys	statements_with_errors_or_warnings
def	sys	statements_with_full_table_scans
def	sys	statements_with_runtimes_in_95th_percentile
def	sys	statements_with_sorting
def	sys	statements_with_temp_tables
def	sys	user_summary
def	sys	user_summary_by_file_io
def	sys	user_summary_by_file_io_type
def	sys	user_summary_by_stages
def	sys	user_summary_by_statement_latency
def	sys	user_summary_by_statement_type
def	sys	version
def	sys	wait_classes_global_by_avg_latency
def	sys	wait_classes_global_by_latency
def	sys	waits_by_host_by_latency
def	sys	waits_by_user_by_latency
def	sys	waits_global_by_latency
def	sys	x$host_summary
def	sys	x$host_summary_by_file_io
def	sys	x$host_summary_by_file_io_type
def	sys	x$host_summary_by_stages
def	sys	x$host_summary_by_statement_latency
def	sys	x$host_summary_by_statement_type
def	sys	x$innodb_buffer_stats_by_schema
def	sys	x$innodb_buffer_stats_by_table
def	sys	x$innodb_lock_waits
def	sys	x$io_by_thread_by_latency
def	sys	x$io_global_by_file_by_bytes
def	sys	x$io_global_by_file_by_latency
def	sys	x$io_global_by_wait_by_bytes
def	sys	x$io_global_by_wait_by_latency
def	sys	x$latest_file_io
def	sys	x$memory_by_host_by_current_bytes
def	sys	x$memory_by_thread_by_current_bytes
def	sys	x$memory_by_user_by_current_bytes
def	sys	x$memory_global_by_current_bytes
def	sys	x$memory_global_total
def	sys	x$processlist
def	sys	x$ps_digest_95th_percentile_by_avg_us
def	sys	x$ps_digest_avg_latency_distribution
def	sys	x$ps_schema_table_statistics_io
def	sys	x$schema_flattened_keys
def	sys	x$schema_index_statistics
def	sys	x$schema_table_lock_waits
def	sys	x$schema_table_statistics
def	sys	x$schema_table_statistics_with_buffer
def	sys	x$schema_tables_with_full_table_scans
def	sys	x$session
def	sys	x$statement_analysis
def	sys	x$statements_with_errors_or_warnings
def	sys	x$statements_with_full_table_scans
def	sys	x$statements_with_runtimes_in_95th_percentile
def	sys	x$statements_with_sorting
def	sys	x$statements_with_temp_tables
def	sys	x$user_summary
def	sys	x$user_summary_by_file_io
def	sys	x$user_summary_by_file_io_type
def	sys	x$user_summary_by_stages
def	sys	x$user_summary_by_statement_latency
def	sys	x$user_summary_by_statement_type
def	sys	x$wait_classes_global_by_avg_latency
def	sys	x$wait_classes_global_by_latency
def	sys	x$waits_by_host_by_latency
def	sys	x$waits_by_user_by_latency
def	sys	x$waits_global_by_latency
################################################################################
# Testcase 3.2.13.2 + 3.2.13.3: INFORMATION_SCHEMA.VIEWS 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 'test_no_views'@'localhost';
CREATE USER 'test_no_views'@'localhost';
CREATE TABLE db_datadict.t1(f1 INT, f2 INT, f3 INT)
ENGINE = <engine_type>;
CREATE VIEW db_datadict.v_granted_to_1 AS SELECT * FROM db_datadict.t1;
CREATE VIEW db_datadict.v_granted_glob AS SELECT f2, f3 FROM db_datadict.t1;
GRANT SELECT ON db_datadict.t1 TO 'testuser1'@'localhost';
GRANT SELECT ON db_datadict.v_granted_to_1 TO 'testuser1'@'localhost';
GRANT SHOW VIEW, CREATE VIEW ON db_datadict.* TO 'testuser2'@'localhost';
SELECT * FROM information_schema.views
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	VIEW_DEFINITION	CHECK_OPTION	IS_UPDATABLE	DEFINER	SECURITY_TYPE	CHARACTER_SET_CLIENT	COLLATION_CONNECTION
def	db_datadict	v_granted_glob	select `db_datadict`.`t1`.`f2` AS `f2`,`db_datadict`.`t1`.`f3` AS `f3` from `db_datadict`.`t1`	NONE	YES	root@localhost	DEFINER	utf8mb4	utf8mb4_0900_ai_ci
def	db_datadict	v_granted_to_1	select `db_datadict`.`t1`.`f1` AS `f1`,`db_datadict`.`t1`.`f2` AS `f2`,`db_datadict`.`t1`.`f3` AS `f3` from `db_datadict`.`t1`	NONE	YES	root@localhost	DEFINER	utf8mb4	utf8mb4_0900_ai_ci
# Establish connection testuser1 (user=testuser1)
SELECT * FROM information_schema.views
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	VIEW_DEFINITION	CHECK_OPTION	IS_UPDATABLE	DEFINER	SECURITY_TYPE	CHARACTER_SET_CLIENT	COLLATION_CONNECTION
def	db_datadict	v_granted_to_1		NONE	YES	root@localhost	DEFINER	utf8mb4	utf8mb4_0900_ai_ci
# Establish connection testuser2 (user=testuser2)
SELECT * FROM information_schema.views
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	VIEW_DEFINITION	CHECK_OPTION	IS_UPDATABLE	DEFINER	SECURITY_TYPE	CHARACTER_SET_CLIENT	COLLATION_CONNECTION
def	db_datadict	v_granted_glob		NONE	YES	root@localhost	DEFINER	utf8mb4	utf8mb4_0900_ai_ci
def	db_datadict	v_granted_to_1		NONE	YES	root@localhost	DEFINER	utf8mb4	utf8mb4_0900_ai_ci
# Establish connection test_no_views (user=test_no_views)
SELECT * FROM information_schema.views
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	VIEW_DEFINITION	CHECK_OPTION	IS_UPDATABLE	DEFINER	SECURITY_TYPE	CHARACTER_SET_CLIENT	COLLATION_CONNECTION
# Switch to connection default and close all other connections
DROP USER 'testuser1'@'localhost';
DROP USER 'testuser2'@'localhost';
DROP USER 'test_no_views'@'localhost';
DROP DATABASE db_datadict;
#########################################################################
# 3.2.1.13+3.2.1.14+3.2.1.15: INFORMATION_SCHEMA.VIEWS modifications
#########################################################################
DROP TABLE IF EXISTS test.t1_my_table;
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
CREATE TABLE test.t1_table (f1 BIGINT, f2 CHAR(10))
DEFAULT CHARACTER SET latin1 COLLATE latin1_swedish_ci
ENGINE = <engine_type>;
DROP   USER 'testuser1'@'localhost';
CREATE USER 'testuser1'@'localhost';
SELECT * FROM information_schema.views
WHERE table_name LIKE 't1_%';
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	VIEW_DEFINITION	CHECK_OPTION	IS_UPDATABLE	DEFINER	SECURITY_TYPE	CHARACTER_SET_CLIENT	COLLATION_CONNECTION
CREATE VIEW test.t1_view AS SELECT DISTINCT f1 FROM test.t1_table;
SELECT * FROM information_schema.views
WHERE table_name LIKE 't1_%';
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	VIEW_DEFINITION	CHECK_OPTION	IS_UPDATABLE	DEFINER	SECURITY_TYPE	CHARACTER_SET_CLIENT	COLLATION_CONNECTION
def	test	t1_view	select distinct `test`.`t1_table`.`f1` AS `f1` from `test`.`t1_table`	NONE	NO	root@localhost	DEFINER	utf8mb4	utf8mb4_0900_ai_ci
SELECT table_name,definer FROM information_schema.views
WHERE table_name = 't1_view';
TABLE_NAME	DEFINER
t1_view	root@localhost
ALTER DEFINER = 'testuser1'@'localhost' VIEW test.t1_view AS
SELECT DISTINCT f1 FROM test.t1_table;
SELECT table_name,definer,security_type FROM information_schema.views
WHERE table_name LIKE 't1_%';
TABLE_NAME	DEFINER	SECURITY_TYPE
t1_view	testuser1@localhost	DEFINER
ALTER DEFINER = 'root'@'localhost' SQL SECURITY INVOKER VIEW test.t1_view AS
SELECT f1 FROM test.t1_table WITH LOCAL CHECK OPTION;
SELECT table_name,definer,security_type FROM information_schema.views
WHERE table_name LIKE 't1_%';
TABLE_NAME	DEFINER	SECURITY_TYPE
t1_view	root@localhost	INVOKER
SELECT table_schema,table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_schema,table_name;
TABLE_SCHEMA	TABLE_NAME
test	t1_view
RENAME TABLE test.t1_view TO db_datadict.t1_view;
ERROR HY000: Changing schema from 'test' to 'db_datadict' is not allowed.
DROP VIEW test.t1_view;
CREATE VIEW db_datadict.t1_view AS SELECT * FROM test.t1_table;
SELECT table_schema,table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_schema,table_name;
TABLE_SCHEMA	TABLE_NAME
db_datadict	t1_view
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
t1_view
RENAME TABLE db_datadict.t1_view TO db_datadict.t1_viewx;
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
t1_viewx
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
t1_viewx
DROP VIEW db_datadict.t1_viewx;
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
CREATE VIEW db_datadict.t1_view AS SELECT * FROM test.t1_table;
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
t1_view
DROP TABLE test.t1_table;
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
t1_view
CREATE TABLE test.t1_table (f1 BIGINT, f2 CHAR(10))
DEFAULT CHARACTER SET latin1 COLLATE latin1_swedish_ci COMMENT = 'Initial Comment'
ENGINE = <engine_type>;
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
t1_view
DROP DATABASE db_datadict;
SELECT table_name FROM information_schema.views
WHERE table_name LIKE 't1_%'
ORDER BY table_name;
TABLE_NAME
DROP USER 'testuser1'@'localhost';
DROP TABLE test.t1_table;
########################################################################
# 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 table are not supported
########################################################################
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
CREATE VIEW db_datadict.v1 AS SELECT 1;
INSERT INTO information_schema.views
SELECT * FROM information_schema.views;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
INSERT INTO information_schema.views(table_schema, table_name)
VALUES ('db2', 'v2');
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
UPDATE information_schema.views SET table_schema = 'test'
WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DELETE FROM information_schema.views WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
TRUNCATE information_schema.views;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE INDEX my_idx_on_views ON information_schema.views(table_schema);
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.views DROP PRIMARY KEY;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.views ADD f1 INT;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE information_schema.views;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.views RENAME db_datadict.views;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.views RENAME information_schema.xviews;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP DATABASE db_datadict;