SHOW TABLES FROM information_schema LIKE 'SCHEMATA'; Tables_in_information_schema (SCHEMATA) SCHEMATA ####################################################################### # 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.SCHEMATA; CREATE PROCEDURE test.p1() SELECT * FROM information_schema.SCHEMATA; CREATE FUNCTION test.f1() returns BIGINT BEGIN DECLARE counter BIGINT DEFAULT NULL; SELECT COUNT(*) INTO counter FROM information_schema.SCHEMATA; RETURN counter; END// # Attention: The printing of the next result sets is disabled. SELECT * FROM information_schema.SCHEMATA; SELECT * FROM test.v1; CALL test.p1; SELECT test.f1(); DROP VIEW test.v1; DROP PROCEDURE test.p1; DROP FUNCTION test.f1; ######################################################################### # Testcase 3.2.9.1: INFORMATION_SCHEMA.SCHEMATA layout; ######################################################################### DESCRIBE information_schema.SCHEMATA; Field Type Null Key Default Extra CATALOG_NAME varchar(512) YES NULL SCHEMA_NAME varchar(64) NO DEFAULT_CHARACTER_SET_NAME varchar(64) NO DEFAULT_COLLATION_NAME varchar(64) NO SQL_PATH varchar(512) YES NULL SHOW CREATE TABLE information_schema.SCHEMATA; Table Create Table SCHEMATA CREATE TEMPORARY TABLE `SCHEMATA` ( `CATALOG_NAME` varchar(512) DEFAULT NULL, `SCHEMA_NAME` varchar(64) NOT NULL DEFAULT '', `DEFAULT_CHARACTER_SET_NAME` varchar(64) NOT NULL DEFAULT '', `DEFAULT_COLLATION_NAME` varchar(64) NOT NULL DEFAULT '', `SQL_PATH` varchar(512) DEFAULT NULL ) ENGINE=MEMORY DEFAULT CHARSET=utf8 SHOW COLUMNS FROM information_schema.SCHEMATA; Field Type Null Key Default Extra CATALOG_NAME varchar(512) YES NULL SCHEMA_NAME varchar(64) NO DEFAULT_CHARACTER_SET_NAME varchar(64) NO DEFAULT_COLLATION_NAME varchar(64) NO SQL_PATH varchar(512) YES NULL SELECT catalog_name, schema_name, sql_path FROM information_schema.schemata WHERE catalog_name IS NOT NULL or sql_path IS NOT NULL; catalog_name schema_name sql_path ############################################################################### # Testcases 3.2.9.2+3.2.9.3: INFORMATION_SCHEMA.SCHEMATA accessible information ############################################################################### DROP DATABASE IF EXISTS db_datadict_1; DROP DATABASE IF EXISTS db_datadict_2; CREATE DATABASE db_datadict_1; CREATE DATABASE db_datadict_2; DROP USER 'testuser1'@'localhost'; CREATE USER 'testuser1'@'localhost'; DROP USER 'testuser2'@'localhost'; CREATE USER 'testuser2'@'localhost'; DROP USER 'testuser3'@'localhost'; CREATE USER 'testuser3'@'localhost'; GRANT SELECT ON db_datadict_1.* to 'testuser1'@'localhost'; GRANT SELECT ON db_datadict_1.* to 'testuser2'@'localhost'; GRANT SELECT ON db_datadict_2.* to 'testuser2'@'localhost'; SELECT * FROM information_schema.schemata WHERE schema_name LIKE 'db_datadict_%' ORDER BY schema_name; CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH NULL db_datadict_1 latin1 latin1_swedish_ci NULL NULL db_datadict_2 latin1 latin1_swedish_ci NULL SHOW DATABASES LIKE 'db_datadict_%'; Database (db_datadict_%) db_datadict_1 db_datadict_2 # Establish connection testuser1 (user=testuser1) SELECT * FROM information_schema.schemata WHERE schema_name LIKE 'db_datadict_%' ORDER BY schema_name; CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH NULL db_datadict_1 latin1 latin1_swedish_ci NULL SHOW DATABASES LIKE 'db_datadict_%'; Database (db_datadict_%) db_datadict_1 # Establish connection testuser2 (user=testuser2) SELECT * FROM information_schema.schemata WHERE schema_name LIKE 'db_datadict_%' ORDER BY schema_name; CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH NULL db_datadict_1 latin1 latin1_swedish_ci NULL NULL db_datadict_2 latin1 latin1_swedish_ci NULL SHOW DATABASES LIKE 'db_datadict_%'; Database (db_datadict_%) db_datadict_1 db_datadict_2 # Establish connection testuser3 (user=testuser3) SELECT * FROM information_schema.schemata WHERE schema_name LIKE 'db_datadict_%' ORDER BY schema_name; CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH SHOW DATABASES LIKE 'db_datadict_%'; Database (db_datadict_%) # Switch to connection default and close connections testuser1,testuser2,testuser3 DROP USER 'testuser1'@'localhost'; DROP USER 'testuser2'@'localhost'; DROP USER 'testuser3'@'localhost'; DROP DATABASE db_datadict_1; DROP DATABASE db_datadict_2; ################################################################################# # Testcases 3.2.1.13+3.2.1.14+3.2.1.15: INFORMATION_SCHEMA.SCHEMATA modifications ################################################################################# DROP DATABASE IF EXISTS db_datadict; SELECT * FROM information_schema.schemata WHERE schema_name = 'db_datadict'; CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH CREATE DATABASE db_datadict CHARACTER SET 'latin1' COLLATE 'latin1_swedish_ci'; SELECT * FROM information_schema.schemata WHERE schema_name = 'db_datadict'; CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH NULL db_datadict latin1 latin1_swedish_ci NULL SELECT schema_name, default_character_set_name FROM information_schema.schemata WHERE schema_name = 'db_datadict'; schema_name default_character_set_name db_datadict latin1 ALTER SCHEMA db_datadict CHARACTER SET 'utf8'; SELECT schema_name, default_character_set_name FROM information_schema.schemata WHERE schema_name = 'db_datadict'; schema_name default_character_set_name db_datadict utf8 ALTER SCHEMA db_datadict CHARACTER SET 'latin1'; SELECT schema_name, default_collation_name FROM information_schema.schemata WHERE schema_name = 'db_datadict'; schema_name default_collation_name db_datadict latin1_swedish_ci ALTER SCHEMA db_datadict COLLATE 'latin1_general_cs'; SELECT schema_name, default_collation_name FROM information_schema.schemata WHERE schema_name = 'db_datadict'; schema_name default_collation_name db_datadict latin1_general_cs SELECT schema_name FROM information_schema.schemata WHERE schema_name = 'db_datadict'; schema_name db_datadict DROP DATABASE db_datadict; SELECT schema_name FROM information_schema.schemata WHERE schema_name = 'db_datadict'; schema_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 tables are not supported ######################################################################## DROP DATABASE IF EXISTS db_datadict; CREATE DATABASE db_datadict CHARACTER SET 'latin1' COLLATE 'latin1_swedish_ci'; INSERT INTO information_schema.schemata (catalog_name, schema_name, default_character_set_name, sql_path) VALUES (NULL, 'db1', 'latin1', NULL); ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' INSERT INTO information_schema.schemata SELECT * FROM information_schema.schemata; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' UPDATE information_schema.schemata SET default_character_set_name = 'utf8' WHERE schema_name = 'db_datadict'; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' UPDATE information_schema.schemata SET catalog_name = 't_4711'; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' DELETE FROM information_schema.schemata WHERE schema_name = 'db_datadict'; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' TRUNCATE information_schema.schemata; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' CREATE INDEX i1 ON information_schema.schemata(schema_name); ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' ALTER TABLE information_schema.schemata ADD f1 INT; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' DROP TABLE information_schema.schemata; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' ALTER TABLE information_schema.schemata RENAME db_datadict.schemata; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' ALTER TABLE information_schema.schemata RENAME information_schema.xschemata; ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema' DROP DATABASE db_datadict;