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Edit File: is_key_column_usage.result

SHOW TABLES FROM information_schema LIKE 'KEY_COLUMN_USAGE';
Tables_in_information_schema (KEY_COLUMN_USAGE)
KEY_COLUMN_USAGE
#######################################################################
# 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.KEY_COLUMN_USAGE;
CREATE PROCEDURE test.p1() SELECT * FROM information_schema.KEY_COLUMN_USAGE;
CREATE FUNCTION test.f1() returns BIGINT
BEGIN
DECLARE counter BIGINT DEFAULT NULL;
SELECT COUNT(*) INTO counter FROM information_schema.KEY_COLUMN_USAGE;
RETURN counter;
END//
# Attention: The printing of the next result sets is disabled.
SELECT * FROM information_schema.KEY_COLUMN_USAGE;
SELECT * FROM test.v1;
CALL test.p1;
SELECT test.f1();
DROP VIEW test.v1;
DROP PROCEDURE test.p1;
DROP FUNCTION test.f1;
#########################################################################
# Testcase 3.2.7.1: INFORMATION_SCHEMA.KEY_COLUMN_USAGE layout
#########################################################################
DESCRIBE          information_schema.KEY_COLUMN_USAGE;
Field	Type	Null	Key	Default	Extra
CONSTRAINT_CATALOG	varchar(512)	NO			
CONSTRAINT_SCHEMA	varchar(64)	NO			
CONSTRAINT_NAME	varchar(64)	NO			
TABLE_CATALOG	varchar(512)	NO			
TABLE_SCHEMA	varchar(64)	NO			
TABLE_NAME	varchar(64)	NO			
COLUMN_NAME	varchar(64)	NO			
ORDINAL_POSITION	bigint(10)	NO		0	
POSITION_IN_UNIQUE_CONSTRAINT	bigint(10)	YES		NULL	
REFERENCED_TABLE_SCHEMA	varchar(64)	YES		NULL	
REFERENCED_TABLE_NAME	varchar(64)	YES		NULL	
REFERENCED_COLUMN_NAME	varchar(64)	YES		NULL	
SHOW CREATE TABLE information_schema.KEY_COLUMN_USAGE;
Table	Create Table
KEY_COLUMN_USAGE	CREATE TEMPORARY TABLE `KEY_COLUMN_USAGE` (
  `CONSTRAINT_CATALOG` varchar(512) NOT NULL DEFAULT '',
  `CONSTRAINT_SCHEMA` varchar(64) NOT NULL DEFAULT '',
  `CONSTRAINT_NAME` varchar(64) NOT NULL DEFAULT '',
  `TABLE_CATALOG` varchar(512) NOT NULL DEFAULT '',
  `TABLE_SCHEMA` varchar(64) NOT NULL DEFAULT '',
  `TABLE_NAME` varchar(64) NOT NULL DEFAULT '',
  `COLUMN_NAME` varchar(64) NOT NULL DEFAULT '',
  `ORDINAL_POSITION` bigint(10) NOT NULL DEFAULT '0',
  `POSITION_IN_UNIQUE_CONSTRAINT` bigint(10) DEFAULT NULL,
  `REFERENCED_TABLE_SCHEMA` varchar(64) DEFAULT NULL,
  `REFERENCED_TABLE_NAME` varchar(64) DEFAULT NULL,
  `REFERENCED_COLUMN_NAME` varchar(64) DEFAULT NULL
) ENGINE=MEMORY DEFAULT CHARSET=utf8
SHOW COLUMNS FROM information_schema.KEY_COLUMN_USAGE;
Field	Type	Null	Key	Default	Extra
CONSTRAINT_CATALOG	varchar(512)	NO			
CONSTRAINT_SCHEMA	varchar(64)	NO			
CONSTRAINT_NAME	varchar(64)	NO			
TABLE_CATALOG	varchar(512)	NO			
TABLE_SCHEMA	varchar(64)	NO			
TABLE_NAME	varchar(64)	NO			
COLUMN_NAME	varchar(64)	NO			
ORDINAL_POSITION	bigint(10)	NO		0	
POSITION_IN_UNIQUE_CONSTRAINT	bigint(10)	YES		NULL	
REFERENCED_TABLE_SCHEMA	varchar(64)	YES		NULL	
REFERENCED_TABLE_NAME	varchar(64)	YES		NULL	
REFERENCED_COLUMN_NAME	varchar(64)	YES		NULL	
SELECT constraint_catalog, constraint_schema, constraint_name, table_catalog,
table_schema, table_name, column_name
FROM information_schema.key_column_usage
WHERE constraint_catalog IS NOT NULL OR table_catalog IS NOT NULL;
constraint_catalog	constraint_schema	constraint_name	table_catalog	table_schema	table_name	column_name
def	mysql	PRIMARY	def	mysql	columns_priv	Host
def	mysql	PRIMARY	def	mysql	columns_priv	Db
def	mysql	PRIMARY	def	mysql	columns_priv	User
def	mysql	PRIMARY	def	mysql	columns_priv	Table_name
def	mysql	PRIMARY	def	mysql	columns_priv	Column_name
def	mysql	PRIMARY	def	mysql	db	Host
def	mysql	PRIMARY	def	mysql	db	Db
def	mysql	PRIMARY	def	mysql	db	User
def	mysql	PRIMARY	def	mysql	event	db
def	mysql	PRIMARY	def	mysql	event	name
def	mysql	PRIMARY	def	mysql	func	name
def	mysql	PRIMARY	def	mysql	help_category	help_category_id
def	mysql	name	def	mysql	help_category	name
def	mysql	PRIMARY	def	mysql	help_keyword	help_keyword_id
def	mysql	name	def	mysql	help_keyword	name
def	mysql	PRIMARY	def	mysql	help_relation	help_keyword_id
def	mysql	PRIMARY	def	mysql	help_relation	help_topic_id
def	mysql	PRIMARY	def	mysql	help_topic	help_topic_id
def	mysql	name	def	mysql	help_topic	name
def	mysql	PRIMARY	def	mysql	host	Host
def	mysql	PRIMARY	def	mysql	host	Db
def	mysql	PRIMARY	def	mysql	ndb_binlog_index	epoch
def	mysql	PRIMARY	def	mysql	plugin	name
def	mysql	PRIMARY	def	mysql	proc	db
def	mysql	PRIMARY	def	mysql	proc	name
def	mysql	PRIMARY	def	mysql	proc	type
def	mysql	PRIMARY	def	mysql	procs_priv	Host
def	mysql	PRIMARY	def	mysql	procs_priv	Db
def	mysql	PRIMARY	def	mysql	procs_priv	User
def	mysql	PRIMARY	def	mysql	procs_priv	Routine_name
def	mysql	PRIMARY	def	mysql	procs_priv	Routine_type
def	mysql	PRIMARY	def	mysql	proxies_priv	Host
def	mysql	PRIMARY	def	mysql	proxies_priv	User
def	mysql	PRIMARY	def	mysql	proxies_priv	Proxied_host
def	mysql	PRIMARY	def	mysql	proxies_priv	Proxied_user
def	mysql	PRIMARY	def	mysql	servers	Server_name
def	mysql	PRIMARY	def	mysql	tables_priv	Host
def	mysql	PRIMARY	def	mysql	tables_priv	Db
def	mysql	PRIMARY	def	mysql	tables_priv	User
def	mysql	PRIMARY	def	mysql	tables_priv	Table_name
def	mysql	PRIMARY	def	mysql	time_zone	Time_zone_id
def	mysql	PRIMARY	def	mysql	time_zone_leap_second	Transition_time
def	mysql	PRIMARY	def	mysql	time_zone_name	Name
def	mysql	PRIMARY	def	mysql	time_zone_transition	Time_zone_id
def	mysql	PRIMARY	def	mysql	time_zone_transition	Transition_time
def	mysql	PRIMARY	def	mysql	time_zone_transition_type	Time_zone_id
def	mysql	PRIMARY	def	mysql	time_zone_transition_type	Transition_type_id
def	mysql	PRIMARY	def	mysql	user	Host
def	mysql	PRIMARY	def	mysql	user	User
########################################################################################
# Testcase 3.2.7.2 + 3.2.7.3: INFORMATION_SCHEMA.KEY_COLUMN_USAGE 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';
USE db_datadict;
CREATE TABLE t1_1
(f1 INT NOT NULL, PRIMARY KEY(f1),
f2 INT,          INDEX f2_ind(f2))
ENGINE = <engine_type>;
GRANT SELECT ON t1_1 to 'testuser1'@'localhost';
CREATE TABLE t1_2
(f1 INT NOT NULL, PRIMARY KEY(f1),
f2 INT,          INDEX f2_ind(f2))
ENGINE = <engine_type>;
GRANT SELECT ON t1_2 to 'testuser2'@'localhost';
SELECT * FROM information_schema.key_column_usage
WHERE table_name LIKE 't1_%'
ORDER BY constraint_catalog, constraint_schema, constraint_name,
table_catalog, table_schema, table_name, ordinal_position;
CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
def	db_datadict	PRIMARY	def	db_datadict	t1_1	f1	1	NULL	NULL	NULL	NULL
def	db_datadict	PRIMARY	def	db_datadict	t1_2	f1	1	NULL	NULL	NULL	NULL
# Establish connection testuser1 (user=testuser1)
SELECT * FROM information_schema.key_column_usage
WHERE table_name LIKE 't1_%'
ORDER BY constraint_catalog, constraint_schema, constraint_name,
table_catalog, table_schema, table_name, ordinal_position;
CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
def	db_datadict	PRIMARY	def	db_datadict	t1_1	f1	1	NULL	NULL	NULL	NULL
# Establish connection testuser2 (user=testuser2)
SELECT * FROM information_schema.key_column_usage
WHERE table_name LIKE 't1_%'
ORDER BY constraint_catalog, constraint_schema, constraint_name,
table_catalog, table_schema, table_name, ordinal_position;
CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
def	db_datadict	PRIMARY	def	db_datadict	t1_2	f1	1	NULL	NULL	NULL	NULL
# Switch to connection default and close connections testuser1, testuser2
DROP USER 'testuser1'@'localhost';
DROP USER 'testuser2'@'localhost';
DROP TABLE t1_1;
DROP TABLE t1_2;
DROP DATABASE IF EXISTS db_datadict;
########################################################################################
# Testcase 3.2.1.13+3.2.1.14+3.2.1.15: INFORMATION_SCHEMA.KEY_COLUMN_USAGE modifications
########################################################################################
DROP DATABASE IF EXISTS db_datadict;
DROP TABLE IF EXISTS test.t1_my_table;
CREATE DATABASE db_datadict;
SELECT table_name FROM information_schema.key_column_usage
WHERE table_name LIKE 't1_my_table%';
table_name
CREATE TABLE test.t1_my_table
(f1 CHAR(12), f2 TIMESTAMP, f4 BIGINT, PRIMARY KEY(f1,f2))
DEFAULT CHARACTER SET latin1 COLLATE latin1_swedish_ci
ENGINE = <engine_type>;
SELECT * FROM information_schema.key_column_usage
WHERE table_name = 't1_my_table';
CONSTRAINT_CATALOG	def
CONSTRAINT_SCHEMA	test
CONSTRAINT_NAME	PRIMARY
TABLE_CATALOG	def
TABLE_SCHEMA	test
TABLE_NAME	t1_my_table
COLUMN_NAME	f1
ORDINAL_POSITION	1
POSITION_IN_UNIQUE_CONSTRAINT	NULL
REFERENCED_TABLE_SCHEMA	NULL
REFERENCED_TABLE_NAME	NULL
REFERENCED_COLUMN_NAME	NULL
CONSTRAINT_CATALOG	def
CONSTRAINT_SCHEMA	test
CONSTRAINT_NAME	PRIMARY
TABLE_CATALOG	def
TABLE_SCHEMA	test
TABLE_NAME	t1_my_table
COLUMN_NAME	f2
ORDINAL_POSITION	2
POSITION_IN_UNIQUE_CONSTRAINT	NULL
REFERENCED_TABLE_SCHEMA	NULL
REFERENCED_TABLE_NAME	NULL
REFERENCED_COLUMN_NAME	NULL
SELECT DISTINCT table_name FROM information_schema.key_column_usage
WHERE table_name LIKE 't1_my_table%';
table_name
t1_my_table
RENAME TABLE test.t1_my_table TO test.t1_my_tablex;
SELECT DISTINCT table_name FROM information_schema.key_column_usage
WHERE table_name LIKE 't1_my_table%';
table_name
t1_my_tablex
SELECT DISTINCT table_schema,table_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_schema	table_name
test	t1_my_tablex
RENAME TABLE test.t1_my_tablex TO db_datadict.t1_my_tablex;
SELECT DISTINCT table_schema,table_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_schema	table_name
db_datadict	t1_my_tablex
SELECT DISTINCT table_name, column_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY table_name, column_name;
table_name	column_name
t1_my_tablex	f1
t1_my_tablex	f2
ALTER TABLE db_datadict.t1_my_tablex CHANGE COLUMN f1 first_col CHAR(12);
SELECT DISTINCT table_name, column_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY table_name, column_name;
table_name	column_name
t1_my_tablex	f2
t1_my_tablex	first_col
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
CREATE INDEX f2 ON db_datadict.t1_my_tablex(f2);
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
DROP INDEX f2 ON db_datadict.t1_my_tablex;
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
ALTER TABLE db_datadict.t1_my_tablex ADD UNIQUE (f2);
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	f2	db_datadict	t1_my_tablex	f2	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
DROP INDEX f2 ON db_datadict.t1_my_tablex;
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
ALTER TABLE db_datadict.t1_my_tablex ADD UNIQUE my_idx (f2);
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	my_idx	db_datadict	t1_my_tablex	f2	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
DROP INDEX my_idx ON db_datadict.t1_my_tablex;
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
ALTER TABLE db_datadict.t1_my_tablex ADD UNIQUE my_idx (f4,first_col);
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	my_idx	db_datadict	t1_my_tablex	f4	1
db_datadict	my_idx	db_datadict	t1_my_tablex	first_col	2
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	my_idx	db_datadict	t1_my_tablex	f4	1
db_datadict	my_idx	db_datadict	t1_my_tablex	first_col	2
db_datadict	PRIMARY	db_datadict	t1_my_tablex	first_col	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	2
ALTER TABLE db_datadict.t1_my_tablex
DROP COLUMN first_col;
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema	constraint_name	table_schema	table_name	column_name	ordinal_position
db_datadict	my_idx	db_datadict	t1_my_tablex	f4	1
db_datadict	PRIMARY	db_datadict	t1_my_tablex	f2	1
SELECT table_name, column_name
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY table_name, column_name;
table_name	column_name
t1_my_tablex	f2
t1_my_tablex	f4
DROP TABLE db_datadict.t1_my_tablex;
SELECT table_name, column_name
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_name	column_name
SELECT table_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_name
CREATE TABLE db_datadict.t1_my_tablex
ENGINE = <engine_type> AS
SELECT 1 AS f1;
SELECT table_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_name
ALTER TABLE db_datadict.t1_my_tablex ADD PRIMARY KEY(f1);
SELECT table_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_name
t1_my_tablex
SELECT table_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_name
t1_my_tablex
DROP DATABASE db_datadict;
SELECT table_name FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex';
table_name
########################################################################
# 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;
DROP TABLE IF EXISTS db_datadict.t1;
CREATE DATABASE db_datadict;
CREATE TABLE db_datadict.t1 (f1 BIGINT)
ENGINE = <engine_type>;
INSERT INTO information_schema.key_column_usage
(constraint_schema, constraint_name, table_name)
VALUES (          'mysql',       'primary',       'db');
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
INSERT INTO information_schema.key_column_usage
SELECT * FROM information_schema.key_column_usage;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
UPDATE information_schema.key_column_usage
SET  table_name = 'db1' WHERE constraint_name = 'primary';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DELETE FROM information_schema.key_column_usage WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
TRUNCATE information_schema.key_column_usage;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE INDEX i3 ON information_schema.key_column_usage(table_name);
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.key_column_usage ADD f1 INT;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE information_schema.key_column_usage;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.key_column_usage
RENAME db_datadict.key_column_usage;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.key_column_usage
RENAME information_schema.xkey_column_usage;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE db_datadict.t1;
DROP DATABASE db_datadict;

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