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SHOW TABLES FROM information_schema LIKE 'TABLES';
Tables_in_information_schema (TABLES)
TABLES
#######################################################################
# 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.TABLES;
CREATE PROCEDURE test.p1() SELECT * FROM information_schema.TABLES;
CREATE FUNCTION test.f1() returns BIGINT
BEGIN
DECLARE counter BIGINT DEFAULT NULL;
SELECT COUNT(*) INTO counter FROM information_schema.TABLES;
RETURN counter;
END//
# Attention: The printing of the next result sets is disabled.
SELECT * FROM information_schema.TABLES;
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.TABLES layout
#########################################################################
DESCRIBE information_schema.TABLES;
Field Type Null Key Default Extra
TABLE_CATALOG varchar(512) NO NULL
TABLE_SCHEMA varchar(64) NO NULL
TABLE_NAME varchar(64) NO NULL
TABLE_TYPE varchar(64) NO NULL
ENGINE varchar(64) YES NULL
VERSION bigint(21) unsigned YES NULL
ROW_FORMAT varchar(10) YES NULL
TABLE_ROWS bigint(21) unsigned YES NULL
AVG_ROW_LENGTH bigint(21) unsigned YES NULL
DATA_LENGTH bigint(21) unsigned YES NULL
MAX_DATA_LENGTH bigint(21) unsigned YES NULL
INDEX_LENGTH bigint(21) unsigned YES NULL
DATA_FREE bigint(21) unsigned YES NULL
AUTO_INCREMENT bigint(21) unsigned YES NULL
CREATE_TIME datetime YES NULL
UPDATE_TIME datetime YES NULL
CHECK_TIME datetime YES NULL
TABLE_COLLATION varchar(64) YES NULL
CHECKSUM bigint(21) unsigned YES NULL
CREATE_OPTIONS varchar(2048) YES NULL
TABLE_COMMENT varchar(2048) NO NULL
MAX_INDEX_LENGTH bigint(21) unsigned YES NULL
TEMPORARY varchar(1) YES NULL
SHOW CREATE TABLE information_schema.TABLES;
Table Create Table
TABLES CREATE TEMPORARY TABLE `TABLES` (
`TABLE_CATALOG` varchar(512) NOT NULL,
`TABLE_SCHEMA` varchar(64) NOT NULL,
`TABLE_NAME` varchar(64) NOT NULL,
`TABLE_TYPE` varchar(64) NOT NULL,
`ENGINE` varchar(64),
`VERSION` bigint(21) unsigned,
`ROW_FORMAT` varchar(10),
`TABLE_ROWS` bigint(21) unsigned,
`AVG_ROW_LENGTH` bigint(21) unsigned,
`DATA_LENGTH` bigint(21) unsigned,
`MAX_DATA_LENGTH` bigint(21) unsigned,
`INDEX_LENGTH` bigint(21) unsigned,
`DATA_FREE` bigint(21) unsigned,
`AUTO_INCREMENT` bigint(21) unsigned,
`CREATE_TIME` datetime,
`UPDATE_TIME` datetime,
`CHECK_TIME` datetime,
`TABLE_COLLATION` varchar(64),
`CHECKSUM` bigint(21) unsigned,
`CREATE_OPTIONS` varchar(2048),
`TABLE_COMMENT` varchar(2048) NOT NULL,
`MAX_INDEX_LENGTH` bigint(21) unsigned,
`TEMPORARY` varchar(1)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_general_ci
SHOW COLUMNS FROM information_schema.TABLES;
Field Type Null Key Default Extra
TABLE_CATALOG varchar(512) NO NULL
TABLE_SCHEMA varchar(64) NO NULL
TABLE_NAME varchar(64) NO NULL
TABLE_TYPE varchar(64) NO NULL
ENGINE varchar(64) YES NULL
VERSION bigint(21) unsigned YES NULL
ROW_FORMAT varchar(10) YES NULL
TABLE_ROWS bigint(21) unsigned YES NULL
AVG_ROW_LENGTH bigint(21) unsigned YES NULL
DATA_LENGTH bigint(21) unsigned YES NULL
MAX_DATA_LENGTH bigint(21) unsigned YES NULL
INDEX_LENGTH bigint(21) unsigned YES NULL
DATA_FREE bigint(21) unsigned YES NULL
AUTO_INCREMENT bigint(21) unsigned YES NULL
CREATE_TIME datetime YES NULL
UPDATE_TIME datetime YES NULL
CHECK_TIME datetime YES NULL
TABLE_COLLATION varchar(64) YES NULL
CHECKSUM bigint(21) unsigned YES NULL
CREATE_OPTIONS varchar(2048) YES NULL
TABLE_COMMENT varchar(2048) NO NULL
MAX_INDEX_LENGTH bigint(21) unsigned YES NULL
TEMPORARY varchar(1) YES NULL
SELECT table_catalog, table_schema, table_name
FROM information_schema.tables WHERE table_catalog IS NULL OR table_catalog <> 'def';
table_catalog table_schema table_name
################################################################################
# Testcase 3.2.12.2 + 3.2.12.3: INFORMATION_SCHEMA.TABLES accessible information
################################################################################
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
DROP USER 'testuser1'@'localhost';
CREATE USER 'testuser1'@'localhost';
GRANT CREATE, CREATE VIEW, INSERT, SELECT ON db_datadict.*
TO 'testuser1'@'localhost' WITH GRANT OPTION;
DROP USER 'testuser2'@'localhost';
CREATE USER 'testuser2'@'localhost';
DROP USER 'testuser3'@'localhost';
CREATE USER 'testuser3'@'localhost';
CREATE TABLE db_datadict.tb1 (f1 INT, f2 INT, f3 INT)
ENGINE = <engine_type>;
GRANT SELECT ON db_datadict.tb1 TO 'testuser1'@'localhost';
GRANT ALL ON db_datadict.tb1 TO 'testuser2'@'localhost' WITH GRANT OPTION;
connect testuser1, localhost, testuser1, , db_datadict;
CREATE TABLE tb2 (f1 DECIMAL)
ENGINE = <engine_type>;
CREATE TABLE tb3 (f1 VARCHAR(200))
ENGINE = <engine_type>;
GRANT SELECT ON db_datadict.tb3 to 'testuser3'@'localhost';
GRANT INSERT ON db_datadict.tb3 to 'testuser2'@'localhost';
CREATE VIEW v3 AS SELECT * FROM tb3;
GRANT SELECT ON db_datadict.v3 to 'testuser3'@'localhost';
SELECT * FROM information_schema.tables
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT MAX_INDEX_LENGTH TEMPORARY
def db_datadict tb1 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict tb2 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict tb3 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict v3 VIEW #ENG# NULL #RF# NULL #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# NULL #CS# NULL VIEW NULL NULL
SHOW TABLES FROM db_datadict;
Tables_in_db_datadict
tb1
tb2
tb3
v3
connect testuser2, localhost, testuser2, , db_datadict;
SELECT * FROM information_schema.tables
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT MAX_INDEX_LENGTH TEMPORARY
def db_datadict tb1 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict tb3 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
SHOW TABLES FROM db_datadict;
Tables_in_db_datadict
tb1
tb3
connect testuser3, localhost, testuser3, , db_datadict;
SELECT * FROM information_schema.tables
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT MAX_INDEX_LENGTH TEMPORARY
def db_datadict tb3 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict v3 VIEW #ENG# NULL #RF# NULL #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# NULL #CS# NULL VIEW NULL NULL
SHOW TABLES FROM db_datadict;
Tables_in_db_datadict
tb3
v3
connection default;
SELECT * FROM information_schema.tables
WHERE table_schema = 'db_datadict' ORDER BY table_name;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT MAX_INDEX_LENGTH TEMPORARY
def db_datadict tb1 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict tb2 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict tb3 BASE TABLE #ENG# 10 #RF# 0 #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# utf8mb4_uca1400_ai_ci #CS# 0 N
def db_datadict v3 VIEW #ENG# NULL #RF# NULL #ARL# #DL# #MDL# #IL# #DF# NULL #CRT #UT# #CT# NULL #CS# NULL VIEW NULL NULL
SHOW TABLES FROM db_datadict;
Tables_in_db_datadict
tb1
tb2
tb3
v3
disconnect testuser1;
disconnect testuser2;
disconnect testuser3;
DROP USER 'testuser1'@'localhost';
DROP USER 'testuser2'@'localhost';
DROP USER 'testuser3'@'localhost';
DROP DATABASE db_datadict;
#########################################################################
# 3.2.1.13+3.2.1.14+3.2.1.15: INFORMATION_SCHEMA.TABLES modifications
#########################################################################
DROP TABLE IF EXISTS test.t1_my_table;
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
SELECT table_name FROM information_schema.tables
WHERE table_name LIKE 't1_my_table%';
table_name
CREATE TABLE test.t1_my_table (f1 BIGINT)
DEFAULT CHARACTER SET latin1 COLLATE latin1_swedish_ci
COMMENT = 'Initial Comment' ENGINE = <engine_type>;
SELECT * FROM information_schema.tables
WHERE table_name = 't1_my_table';
TABLE_CATALOG def
TABLE_SCHEMA test
TABLE_NAME t1_my_table
TABLE_TYPE BASE TABLE
ENGINE #ENG#
VERSION 10
ROW_FORMAT #RF#
TABLE_ROWS 0
AVG_ROW_LENGTH #ARL#
DATA_LENGTH #DL#
MAX_DATA_LENGTH #MDL#
INDEX_LENGTH #IL#
DATA_FREE #DF#
AUTO_INCREMENT NULL
CREATE_TIME #CRT
UPDATE_TIME #UT#
CHECK_TIME #CT#
TABLE_COLLATION latin1_swedish_ci
CHECKSUM #CS#
CREATE_OPTIONS
TABLE_COMMENT Initial Comment
MAX_INDEX_LENGTH 0
TEMPORARY N
SELECT table_name FROM information_schema.tables
WHERE table_name LIKE 't1_my_table%';
table_name
t1_my_table
RENAME TABLE test.t1_my_table TO test.t1_my_tablex;
SELECT table_name FROM information_schema.tables
WHERE table_name LIKE 't1_my_table%';
table_name
t1_my_tablex
SELECT table_schema,table_name FROM information_schema.tables
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 table_schema,table_name FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_schema table_name
db_datadict t1_my_tablex
SELECT table_name, engine FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name engine
t1_my_tablex <engine_type>
ALTER TABLE db_datadict.t1_my_tablex
ENGINE = <other_engine_type>;
SELECT table_name, engine FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name engine
t1_my_tablex <other_engine_type>
SELECT table_name, table_rows FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name table_rows
t1_my_tablex 0
INSERT INTO db_datadict.t1_my_tablex VALUES(1),(2);
SELECT table_name, table_rows FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name table_rows
t1_my_tablex 2
SELECT table_name, table_collation FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name table_collation
t1_my_tablex latin1_swedish_ci
ALTER TABLE db_datadict.t1_my_tablex DEFAULT CHARACTER SET utf8;
SELECT table_name, table_collation FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name table_collation
t1_my_tablex utf8mb3_uca1400_ai_ci
SELECT table_name, table_collation FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name table_collation
t1_my_tablex utf8mb3_uca1400_ai_ci
ALTER TABLE db_datadict.t1_my_tablex
DEFAULT CHARACTER SET latin1 COLLATE latin1_german1_ci;
SELECT table_name, table_collation FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name table_collation
t1_my_tablex latin1_german1_ci
SELECT table_name, TABLE_COMMENT FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name TABLE_COMMENT
t1_my_tablex Initial Comment
ALTER TABLE db_datadict.t1_my_tablex COMMENT 'Changed Comment';
SELECT table_name, TABLE_COMMENT FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name TABLE_COMMENT
t1_my_tablex Changed Comment
SELECT table_name, AUTO_INCREMENT FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name AUTO_INCREMENT
t1_my_tablex NULL
ALTER TABLE db_datadict.t1_my_tablex
ADD f2 BIGINT AUTO_INCREMENT, ADD PRIMARY KEY (f2);
SELECT table_name, AUTO_INCREMENT FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name AUTO_INCREMENT
t1_my_tablex 3
SELECT table_name, ROW_FORMAT FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name ROW_FORMAT
t1_my_tablex Fixed
ALTER TABLE db_datadict.t1_my_tablex ROW_FORMAT = dynamic;
SELECT table_name, ROW_FORMAT FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name ROW_FORMAT
t1_my_tablex Dynamic
SELECT table_name, checksum FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name checksum
t1_my_tablex NULL
ALTER TABLE db_datadict.t1_my_tablex CHECKSUM = 1;
SELECT table_name, checksum IS NOT NULL FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name checksum IS NOT NULL
t1_my_tablex 1
SELECT UPDATE_TIME, checksum INTO @UPDATE_TIME, @checksum
FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
INSERT INTO db_datadict.t1_my_tablex SET f1 = 3;
FLUSH TABLES;
SELECT UPDATE_TIME > @UPDATE_TIME
AS "Is current UPDATE_TIME bigger than before last INSERT?"
FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
Is current UPDATE_TIME bigger than before last INSERT?
1
SELECT checksum <> @checksum
AS "Is current CHECKSUM different than before last INSERT?"
FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
Is current CHECKSUM different than before last INSERT?
1
SELECT CREATE_TIME INTO @CREATE_TIME FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
SELECT table_name FROM information_schema.tables
WHERE table_name LIKE 't1_my_table%';
table_name
t1_my_tablex
DROP TABLE db_datadict.t1_my_tablex;
SELECT table_name FROM information_schema.tables
WHERE table_name LIKE 't1_my_table%';
table_name
CREATE TABLE test.t1_my_tablex (f1 BIGINT)
ENGINE = <other_engine_type>;
SELECT CREATE_TIME > @CREATE_TIME
AS "Is current CREATE_TIME bigger than for the old dropped table?"
FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
Is current CREATE_TIME bigger than for the old dropped table?
1
DROP TABLE test.t1_my_tablex;
CREATE VIEW test.t1_my_tablex AS SELECT 1;
SELECT * FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
TABLE_CATALOG def
TABLE_SCHEMA test
TABLE_NAME t1_my_tablex
TABLE_TYPE VIEW
ENGINE NULL
VERSION NULL
ROW_FORMAT NULL
TABLE_ROWS NULL
AVG_ROW_LENGTH NULL
DATA_LENGTH NULL
MAX_DATA_LENGTH NULL
INDEX_LENGTH NULL
DATA_FREE NULL
AUTO_INCREMENT NULL
CREATE_TIME NULL
UPDATE_TIME NULL
CHECK_TIME NULL
TABLE_COLLATION NULL
CHECKSUM NULL
CREATE_OPTIONS NULL
TABLE_COMMENT VIEW
MAX_INDEX_LENGTH NULL
TEMPORARY NULL
DROP VIEW test.t1_my_tablex;
SELECT table_name FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name
CREATE TEMPORARY TABLE test.t1_my_tablex
ENGINE = <other_engine_type>
AS SELECT 1;
SELECT table_name, table_type FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name t1_my_tablex
table_type TEMPORARY
DROP TEMPORARY TABLE test.t1_my_tablex;
CREATE TABLE db_datadict.t1_my_tablex
ENGINE = <engine_type> AS
SELECT 1;
SELECT table_name FROM information_schema.tables
WHERE table_name = 't1_my_tablex';
table_name
t1_my_tablex
DROP DATABASE db_datadict;
SELECT table_name FROM information_schema.tables
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 tables are not supported
########################################################################
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
CREATE TABLE db_datadict.t1 (f1 BIGINT)
ENGINE = <engine_type>;
INSERT INTO information_schema.tables
SELECT * FROM information_schema.tables;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
UPDATE information_schema.tables SET table_schema = 'test'
WHERE table_name = 't1';
Got one of the listed errors
DELETE FROM information_schema.tables WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
TRUNCATE information_schema.tables;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE INDEX my_idx_on_tables ON information_schema.tables(table_schema);
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.tables DROP PRIMARY KEY;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.tables ADD f1 INT;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE information_schema.tables;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.tables RENAME db_datadict.tables;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.tables RENAME information_schema.xtables;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP DATABASE db_datadict;
|
