SHOW TABLES FROM information_schema LIKE 'CHARACTER_SETS';
Tables_in_information_schema (CHARACTER_SETS)
CHARACTER_SETS
#######################################################################
# 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.CHARACTER_SETS;
CREATE PROCEDURE test.p1() SELECT * FROM information_schema.CHARACTER_SETS;
CREATE FUNCTION test.f1() returns BIGINT
BEGIN
DECLARE counter BIGINT DEFAULT NULL;
SELECT COUNT(*) INTO counter FROM information_schema.CHARACTER_SETS;
RETURN counter;
END//
# Attention: The printing of the next result sets is disabled.
SELECT * FROM information_schema.CHARACTER_SETS;
SELECT * FROM test.v1;
CALL test.p1;
SELECT test.f1();
DROP VIEW test.v1;
DROP PROCEDURE test.p1;
DROP FUNCTION test.f1;
#########################################################################
# Testcase 3.2.2.1: INFORMATION_SCHEMA.CHARACTER_SETS layout
#########################################################################
DESCRIBE          information_schema.CHARACTER_SETS;
Field	Type	Null	Key	Default	Extra
CHARACTER_SET_NAME	varchar(32)	NO		NULL	
DEFAULT_COLLATE_NAME	varchar(64)	NO		NULL	
DESCRIPTION	varchar(60)	NO		NULL	
MAXLEN	bigint(3)	NO		NULL	
SHOW CREATE TABLE information_schema.CHARACTER_SETS;
Table	Create Table
CHARACTER_SETS	CREATE TEMPORARY TABLE `CHARACTER_SETS` (
  `CHARACTER_SET_NAME` varchar(32) NOT NULL,
  `DEFAULT_COLLATE_NAME` varchar(64) NOT NULL,
  `DESCRIPTION` varchar(60) NOT NULL,
  `MAXLEN` bigint(3) NOT NULL
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_general_ci
SHOW COLUMNS FROM information_schema.CHARACTER_SETS;
Field	Type	Null	Key	Default	Extra
CHARACTER_SET_NAME	varchar(32)	NO		NULL	
DEFAULT_COLLATE_NAME	varchar(64)	NO		NULL	
DESCRIPTION	varchar(60)	NO		NULL	
MAXLEN	bigint(3)	NO		NULL	
# Testcases 3.2.2.2 and 3.2.2.3 are checked in suite/funcs_1/t/charset_collation*.test
########################################################################
# 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;
INSERT INTO information_schema.character_sets
SELECT * FROM information_schema.character_sets;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
UPDATE information_schema.character_sets SET description = 'just updated';
Got one of the listed errors
DELETE FROM information_schema.character_sets WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
TRUNCATE information_schema.character_sets;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE INDEX my_idx ON information_schema.character_sets(character_set_name);
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.character_sets DROP PRIMARY KEY;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.character_sets ADD f1 INT;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE information_schema.character_sets;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.character_sets RENAME db_datadict.character_sets;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.character_sets
RENAME information_schema.xcharacter_sets;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP DATABASE db_datadict;