SHOW TABLES FROM information_schema LIKE 'COLUMNS';
Tables_in_information_schema (COLUMNS)
COLUMNS
#######################################################################
# 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.COLUMNS;
CREATE PROCEDURE test.p1() SELECT * FROM information_schema.COLUMNS;
CREATE FUNCTION test.f1() returns BIGINT
BEGIN
DECLARE counter BIGINT DEFAULT NULL;
SELECT COUNT(*) INTO counter FROM information_schema.COLUMNS;
RETURN counter;
END//
# Attention: The printing of the next result sets is disabled.
SELECT * FROM information_schema.COLUMNS;
SELECT * FROM test.v1;
CALL test.p1;
SELECT test.f1();
DROP VIEW test.v1;
DROP PROCEDURE test.p1;
DROP FUNCTION test.f1;
#########################################################################
# Testcase 3.2.6.1: INFORMATION_SCHEMA.COLUMNS layout
#########################################################################
DESCRIBE information_schema.COLUMNS;
Field Type Null Key Default Extra
TABLE_CATALOG varchar(512) NO
TABLE_SCHEMA varchar(64) NO
TABLE_NAME varchar(64) NO
COLUMN_NAME varchar(64) NO
ORDINAL_POSITION bigint(21) unsigned NO 0
COLUMN_DEFAULT longtext YES NULL
IS_NULLABLE varchar(3) NO
DATA_TYPE varchar(64) NO
CHARACTER_MAXIMUM_LENGTH bigint(21) unsigned YES NULL
CHARACTER_OCTET_LENGTH bigint(21) unsigned YES NULL
NUMERIC_PRECISION bigint(21) unsigned YES NULL
NUMERIC_SCALE bigint(21) unsigned YES NULL
DATETIME_PRECISION bigint(21) unsigned YES NULL
CHARACTER_SET_NAME varchar(32) YES NULL
COLLATION_NAME varchar(32) YES NULL
COLUMN_TYPE longtext NO NULL
COLUMN_KEY varchar(3) NO
EXTRA varchar(30) NO
PRIVILEGES varchar(80) NO
COLUMN_COMMENT varchar(1024) NO
SHOW CREATE TABLE information_schema.COLUMNS;
Table Create Table
COLUMNS CREATE TEMPORARY TABLE `COLUMNS` (
`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(21) unsigned NOT NULL DEFAULT '0',
`COLUMN_DEFAULT` longtext,
`IS_NULLABLE` varchar(3) NOT NULL DEFAULT '',
`DATA_TYPE` varchar(64) NOT NULL DEFAULT '',
`CHARACTER_MAXIMUM_LENGTH` bigint(21) unsigned DEFAULT NULL,
`CHARACTER_OCTET_LENGTH` bigint(21) unsigned DEFAULT NULL,
`NUMERIC_PRECISION` bigint(21) unsigned DEFAULT NULL,
`NUMERIC_SCALE` bigint(21) unsigned DEFAULT NULL,
`DATETIME_PRECISION` bigint(21) unsigned DEFAULT NULL,
`CHARACTER_SET_NAME` varchar(32) DEFAULT NULL,
`COLLATION_NAME` varchar(32) DEFAULT NULL,
`COLUMN_TYPE` longtext NOT NULL,
`COLUMN_KEY` varchar(3) NOT NULL DEFAULT '',
`EXTRA` varchar(30) NOT NULL DEFAULT '',
`PRIVILEGES` varchar(80) NOT NULL DEFAULT '',
`COLUMN_COMMENT` varchar(1024) NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=utf8
SHOW COLUMNS FROM information_schema.COLUMNS;
Field Type Null Key Default Extra
TABLE_CATALOG varchar(512) NO
TABLE_SCHEMA varchar(64) NO
TABLE_NAME varchar(64) NO
COLUMN_NAME varchar(64) NO
ORDINAL_POSITION bigint(21) unsigned NO 0
COLUMN_DEFAULT longtext YES NULL
IS_NULLABLE varchar(3) NO
DATA_TYPE varchar(64) NO
CHARACTER_MAXIMUM_LENGTH bigint(21) unsigned YES NULL
CHARACTER_OCTET_LENGTH bigint(21) unsigned YES NULL
NUMERIC_PRECISION bigint(21) unsigned YES NULL
NUMERIC_SCALE bigint(21) unsigned YES NULL
DATETIME_PRECISION bigint(21) unsigned YES NULL
CHARACTER_SET_NAME varchar(32) YES NULL
COLLATION_NAME varchar(32) YES NULL
COLUMN_TYPE longtext NO NULL
COLUMN_KEY varchar(3) NO
EXTRA varchar(30) NO
PRIVILEGES varchar(80) NO
COLUMN_COMMENT varchar(1024) NO
SELECT table_catalog, table_schema, table_name, column_name
FROM information_schema.columns WHERE table_catalog IS NULL OR table_catalog <> 'def';
table_catalog table_schema table_name column_name
###############################################################################
# Testcase 3.2.6.2 + 3.2.6.3: INFORMATION_SCHEMA.COLUMNS 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';
CREATE TABLE db_datadict.t1
(f1 CHAR(10), f2 TEXT, f3 DATE, f4 INT AUTO_INCREMENT,
UNIQUE INDEX MUL_IDX(f1,f3), PRIMARY KEY (f4))
ENGINE = <other_engine_type>;
CREATE VIEW db_datadict.v1 AS SELECT 1 AS f1, 1 AS f2;
GRANT SELECT(f1, f2) ON db_datadict.t1 TO 'testuser1'@'localhost';
GRANT SELECT(f2) ON db_datadict.v1 TO 'testuser1'@'localhost';
CREATE TABLE db_datadict.t2
(f1 CHAR(10), f2 TEXT, f3 DATE, f4 INT, PRIMARY KEY (f1,f4))
ENGINE = <other_engine_type>;
GRANT INSERT(f1, f2) ON db_datadict.t2 TO 'testuser2'@'localhost';
SELECT * FROM information_schema.columns
WHERE table_schema = 'db_datadict'
ORDER BY table_schema, table_name, ordinal_position;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE DATETIME_PRECISION CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
def db_datadict t1 f1 1 NULL YES char 10 10 NULL NULL NULL latin1 latin1_swedish_ci char(10) MUL select,insert,update,references
def db_datadict t1 f2 2 NULL YES text 65535 65535 NULL NULL NULL latin1 latin1_swedish_ci text select,insert,update,references
def db_datadict t1 f3 3 NULL YES date NULL NULL NULL NULL NULL NULL NULL date select,insert,update,references
def db_datadict t1 f4 4 NULL NO int NULL NULL 10 0 NULL NULL NULL int(11) PRI auto_increment select,insert,update,references
def db_datadict t2 f1 1 NO char 10 10 NULL NULL NULL latin1 latin1_swedish_ci char(10) PRI select,insert,update,references
def db_datadict t2 f2 2 NULL YES text 65535 65535 NULL NULL NULL latin1 latin1_swedish_ci text select,insert,update,references
def db_datadict t2 f3 3 NULL YES date NULL NULL NULL NULL NULL NULL NULL date select,insert,update,references
def db_datadict t2 f4 4 0 NO int NULL NULL 10 0 NULL NULL NULL int(11) PRI select,insert,update,references
def db_datadict v1 f1 1 0 NO int NULL NULL 10 0 NULL NULL NULL int(1) select,insert,update,references
def db_datadict v1 f2 2 0 NO int NULL NULL 10 0 NULL NULL NULL int(1) select,insert,update,references
SHOW COLUMNS FROM db_datadict.t1;
Field Type Null Key Default Extra
f1 char(10) YES MUL NULL
f2 text YES NULL
f3 date YES NULL
f4 int(11) NO PRI NULL auto_increment
SHOW COLUMNS FROM db_datadict.t2;
Field Type Null Key Default Extra
f1 char(10) NO PRI
f2 text YES NULL
f3 date YES NULL
f4 int(11) NO PRI 0
SHOW COLUMNS FROM db_datadict.v1;
Field Type Null Key Default Extra
f1 int(1) NO 0
f2 int(1) NO 0
# Establish connection testuser1 (user=testuser1)
SELECT * FROM information_schema.columns
WHERE table_schema = 'db_datadict'
ORDER BY table_schema, table_name, ordinal_position;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE DATETIME_PRECISION CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
def db_datadict t1 f1 1 NULL YES char 10 10 NULL NULL NULL latin1 latin1_swedish_ci char(10) MUL select
def db_datadict t1 f2 2 NULL YES text 65535 65535 NULL NULL NULL latin1 latin1_swedish_ci text select
def db_datadict v1 f2 2 0 NO int NULL NULL 10 0 NULL NULL NULL int(1) select
SHOW COLUMNS FROM db_datadict.t1;
Field Type Null Key Default Extra
f1 char(10) YES MUL NULL
f2 text YES NULL
SHOW COLUMNS FROM db_datadict.t2;
ERROR 42000: SELECT command denied to user 'testuser1'@'localhost' for table 't2'
SHOW COLUMNS FROM db_datadict.v1;
Field Type Null Key Default Extra
f2 int(1) NO 0
# Establish connection testuser2 (user=testuser2)
SELECT * FROM information_schema.columns
WHERE table_schema = 'db_datadict'
ORDER BY table_schema, table_name, ordinal_position;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE DATETIME_PRECISION CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
def db_datadict t2 f1 1 NO char 10 10 NULL NULL NULL latin1 latin1_swedish_ci char(10) PRI insert
def db_datadict t2 f2 2 NULL YES text 65535 65535 NULL NULL NULL latin1 latin1_swedish_ci text insert
SHOW COLUMNS FROM db_datadict.t1;
ERROR 42000: SELECT command denied to user 'testuser2'@'localhost' for table 't1'
SHOW COLUMNS FROM db_datadict.t2;
Field Type Null Key Default Extra
f1 char(10) NO PRI
f2 text YES NULL
SHOW COLUMNS FROM db_datadict.v1;
ERROR 42000: SELECT command denied to user 'testuser2'@'localhost' for table 'v1'
# Switch to connection default and close connections testuser1, testuser2
DROP USER 'testuser1'@'localhost';
DROP USER 'testuser2'@'localhost';
DROP DATABASE IF EXISTS db_datadict;
###############################################################################
# Testcase 3.2.1.13+3.2.1.14+3.2.1.15: INFORMATION_SCHEMA.COLUMNS 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.columns
WHERE table_name LIKE 't1_my_table%';
table_name
CREATE TABLE test.t1_my_table (f1 CHAR(12))
DEFAULT CHARACTER SET latin1 COLLATE latin1_swedish_ci
ENGINE = <engine_type>;
SELECT * FROM information_schema.columns
WHERE table_name = 't1_my_table';
TABLE_CATALOG def
TABLE_SCHEMA test
TABLE_NAME t1_my_table
COLUMN_NAME f1
ORDINAL_POSITION 1
COLUMN_DEFAULT NULL
IS_NULLABLE YES
DATA_TYPE char
CHARACTER_MAXIMUM_LENGTH 12
CHARACTER_OCTET_LENGTH 12
NUMERIC_PRECISION NULL
NUMERIC_SCALE NULL
DATETIME_PRECISION NULL
CHARACTER_SET_NAME latin1
COLLATION_NAME latin1_swedish_ci
COLUMN_TYPE char(12)
COLUMN_KEY
EXTRA
PRIVILEGES select,insert,update,references
COLUMN_COMMENT
SELECT table_name FROM information_schema.columns
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.columns
WHERE table_name LIKE 't1_my_table%';
table_name
t1_my_tablex
SELECT table_schema,table_name FROM information_schema.columns
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.columns
WHERE table_name = 't1_my_tablex';
table_schema table_name
db_datadict t1_my_tablex
SELECT table_name, column_name FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
t1_my_tablex f1
ALTER TABLE db_datadict.t1_my_tablex CHANGE COLUMN f1 first_col CHAR(12);
SELECT table_name, column_name FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
t1_my_tablex first_col
SELECT table_name, column_name, character_maximum_length,
character_octet_length, column_type
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name character_maximum_length character_octet_length column_type
t1_my_tablex first_col 12 12 char(12)
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN first_col CHAR(20);
SELECT table_name, column_name, character_maximum_length,
character_octet_length, column_type
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name character_maximum_length character_octet_length column_type
t1_my_tablex first_col 20 20 char(20)
SELECT table_name, column_name, character_maximum_length,
character_octet_length, column_type
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name character_maximum_length character_octet_length column_type
t1_my_tablex first_col 20 20 char(20)
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN first_col VARCHAR(20);
SELECT table_name, column_name, character_maximum_length,
character_octet_length, column_type
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name character_maximum_length character_octet_length column_type
t1_my_tablex first_col 20 20 varchar(20)
SELECT table_name, column_name, column_default
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name column_default
t1_my_tablex first_col NULL
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN first_col CHAR(10) DEFAULT 'hello';
SELECT table_name, column_name, column_default
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name column_default
t1_my_tablex first_col hello
SELECT table_name, column_name, is_nullable
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name is_nullable
t1_my_tablex first_col YES
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN first_col CHAR(10) NOT NULL;
SELECT table_name, column_name, is_nullable
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name is_nullable
t1_my_tablex first_col NO
SELECT table_name, column_name, collation_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name collation_name
t1_my_tablex first_col latin1_swedish_ci
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN first_col CHAR(10) COLLATE 'latin1_general_cs';
SELECT table_name, column_name, collation_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name collation_name
t1_my_tablex first_col latin1_general_cs
SELECT table_name, column_name, character_maximum_length,
character_octet_length, character_set_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name character_maximum_length character_octet_length character_set_name
t1_my_tablex first_col 10 10 latin1
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN first_col CHAR(10) CHARACTER SET utf8;
SELECT table_name, column_name, character_maximum_length,
character_octet_length, character_set_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name character_maximum_length character_octet_length character_set_name
t1_my_tablex first_col 10 30 utf8
SELECT table_name, column_name, column_comment
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name column_comment
t1_my_tablex first_col
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN first_col CHAR(10) COMMENT 'Hello';
SELECT table_name, column_name, column_comment
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name column_comment
t1_my_tablex first_col Hello
SELECT table_name, column_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
t1_my_tablex first_col
ALTER TABLE db_datadict.t1_my_tablex
ADD COLUMN second_col CHAR(10);
SELECT table_name, column_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
t1_my_tablex first_col
t1_my_tablex second_col
SELECT table_name, column_name, ordinal_position
FROM information_schema.columns
WHERE table_name = 't1_my_tablex'
ORDER BY table_name, column_name;
table_name column_name ordinal_position
t1_my_tablex first_col 1
t1_my_tablex second_col 2
ALTER TABLE db_datadict.t1_my_tablex
MODIFY COLUMN second_col CHAR(10) FIRST;
SELECT table_name, column_name, ordinal_position
FROM information_schema.columns
WHERE table_name = 't1_my_tablex'
ORDER BY table_name, column_name;
table_name column_name ordinal_position
t1_my_tablex first_col 2
t1_my_tablex second_col 1
SELECT table_name, column_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
t1_my_tablex second_col
t1_my_tablex first_col
ALTER TABLE db_datadict.t1_my_tablex
DROP COLUMN first_col;
SELECT table_name, column_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
t1_my_tablex second_col
SELECT table_name, column_name, column_key
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name column_key
t1_my_tablex second_col
ALTER TABLE db_datadict.t1_my_tablex
ADD UNIQUE INDEX IDX(second_col);
SELECT table_name, column_name, column_key
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name column_key
t1_my_tablex second_col UNI
SELECT table_name, column_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
t1_my_tablex second_col
DROP TABLE db_datadict.t1_my_tablex;
SELECT table_name, column_name
FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name column_name
CREATE VIEW test.t1_my_tablex
AS SELECT 1 AS "col1", 'A' collate latin1_german1_ci AS "col2";
SELECT * FROM information_schema.columns
WHERE table_name = 't1_my_tablex'
ORDER BY table_name, column_name;
TABLE_CATALOG def
TABLE_SCHEMA test
TABLE_NAME t1_my_tablex
COLUMN_NAME col1
ORDINAL_POSITION 1
COLUMN_DEFAULT 0
IS_NULLABLE NO
DATA_TYPE int
CHARACTER_MAXIMUM_LENGTH NULL
CHARACTER_OCTET_LENGTH NULL
NUMERIC_PRECISION 10
NUMERIC_SCALE 0
DATETIME_PRECISION NULL
CHARACTER_SET_NAME NULL
COLLATION_NAME NULL
COLUMN_TYPE int(1)
COLUMN_KEY
EXTRA
PRIVILEGES select,insert,update,references
COLUMN_COMMENT
TABLE_CATALOG def
TABLE_SCHEMA test
TABLE_NAME t1_my_tablex
COLUMN_NAME col2
ORDINAL_POSITION 2
COLUMN_DEFAULT
IS_NULLABLE NO
DATA_TYPE varchar
CHARACTER_MAXIMUM_LENGTH 1
CHARACTER_OCTET_LENGTH 1
NUMERIC_PRECISION NULL
NUMERIC_SCALE NULL
DATETIME_PRECISION NULL
CHARACTER_SET_NAME latin1
COLLATION_NAME latin1_german1_ci
COLUMN_TYPE varchar(1)
COLUMN_KEY
EXTRA
PRIVILEGES select,insert,update,references
COLUMN_COMMENT
DROP VIEW test.t1_my_tablex;
SELECT table_name FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name
CREATE TABLE db_datadict.t1_my_tablex
ENGINE = <engine_type> AS
SELECT 1;
SELECT table_name FROM information_schema.columns
WHERE table_name = 't1_my_tablex';
table_name
t1_my_tablex
DROP DATABASE db_datadict;
SELECT table_name FROM information_schema.columns
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 test.t1;
CREATE DATABASE db_datadict;
CREATE TABLE test.t1 (f1 BIGINT);
INSERT INTO information_schema.columns (table_schema,table_name,column_name)
VALUES('test','t1', 'f2');
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
INSERT INTO information_schema.columns (table_schema,table_name,column_name)
VALUES('test','t2', 'f1');
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
UPDATE information_schema.columns SET table_name = 't4' WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DELETE FROM information_schema.columns WHERE table_name = 't1';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
TRUNCATE information_schema.columns;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE INDEX i3 ON information_schema.columns(table_name);
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.columns ADD f1 INT;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE information_schema.columns;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.columns RENAME db_datadict.columns;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.columns RENAME information_schema.xcolumns;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE test.t1;
DROP DATABASE db_datadict;