mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-17 04:22:27 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
mariadb/mysql-test/r/information_schema.result
Igor Babaev 704f97035f Merged the code of MWL#106 into 5.3 
Resolved all conflicts, bad merges and fixed a few minor bugs in the code.
Commented out the queries from multi_update, view, subselect_sj, func_str,
derived_view, view_grant that failed either with crashes in ps-protocol or
with wrong results.
The failures are clear indications of some bugs in the code and these bugs
are to be fixed.
2011-05-16 22:39:43 -07:00

1683 lines
69 KiB
Text
Raw Blame History

DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5;
DROP VIEW IF EXISTS v1;
show variables where variable_name like "skip_show_database";
Variable_name Value
skip_show_database OFF
grant select, update, execute on test.* to mysqltest_2@localhost;
grant select, update on test.* to mysqltest_1@localhost;
create user mysqltest_3@localhost;
create user mysqltest_3;
select * from information_schema.SCHEMATA where schema_name > 'm';
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
NULL mtr latin1 latin1_swedish_ci NULL
NULL mysql latin1 latin1_swedish_ci NULL
NULL test latin1 latin1_swedish_ci NULL
select schema_name from information_schema.schemata;
schema_name
information_schema
mtr
mysql
test
show databases like 't%';
Database (t%)
test
show databases;
Database
information_schema
mtr
mysql
test
show databases where `database` = 't%';
Database
create database mysqltest;
create table mysqltest.t1(a int, b VARCHAR(30), KEY string_data (b));
create table test.t2(a int);
create table t3(a int, KEY a_data (a));
create table mysqltest.t4(a int);
create table t5 (id int auto_increment primary key);
insert into t5 values (10);
create view v1 (c) as
SELECT table_name FROM information_schema.TABLES
WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test', 'mysqltest') AND
table_name<>'ndb_binlog_index' AND
table_name<>'ndb_apply_status' AND
NOT (table_schema = 'INFORMATION_SCHEMA' AND table_name LIKE 'PBXT_%');
select * from v1 ORDER BY c COLLATE utf8_bin;
c
CHARACTER_SETS
CLIENT_STATISTICS
COLLATIONS
COLLATION_CHARACTER_SET_APPLICABILITY
COLUMNS
COLUMN_PRIVILEGES
ENGINES
EVENTS
FILES
GLOBAL_STATUS
GLOBAL_VARIABLES
INDEX_STATISTICS
INNODB_BUFFER_POOL_PAGES
INNODB_BUFFER_POOL_PAGES_BLOB
INNODB_BUFFER_POOL_PAGES_INDEX
INNODB_CMP
INNODB_CMPMEM
INNODB_CMPMEM_RESET
INNODB_CMP_RESET
INNODB_INDEX_STATS
INNODB_LOCKS
INNODB_LOCK_WAITS
INNODB_RSEG
INNODB_SYS_INDEXES
INNODB_SYS_STATS
INNODB_SYS_TABLES
INNODB_TABLE_STATS
INNODB_TRX
KEY_CACHES
KEY_COLUMN_USAGE
PARTITIONS
PLUGINS
PROCESSLIST
PROFILING
REFERENTIAL_CONSTRAINTS
ROUTINES
SCHEMATA
SCHEMA_PRIVILEGES
SESSION_STATUS
SESSION_VARIABLES
STATISTICS
TABLES
TABLE_CONSTRAINTS
TABLE_PRIVILEGES
TABLE_STATISTICS
TRIGGERS
USER_PRIVILEGES
USER_STATISTICS
VIEWS
XTRADB_ADMIN_COMMAND
XTRADB_ENHANCEMENTS
columns_priv
db
event
func
general_log
help_category
help_keyword
help_relation
help_topic
host
plugin
proc
procs_priv
servers
slow_log
t1
t2
t3
t4
t5
tables_priv
time_zone
time_zone_leap_second
time_zone_name
time_zone_transition
time_zone_transition_type
user
v1
select c,table_name from v1
inner join information_schema.TABLES v2 on (v1.c=v2.table_name)
where v1.c like "t%";
c table_name
TABLES TABLES
TABLE_CONSTRAINTS TABLE_CONSTRAINTS
TABLE_PRIVILEGES TABLE_PRIVILEGES
TABLE_STATISTICS TABLE_STATISTICS
TRIGGERS TRIGGERS
tables_priv tables_priv
time_zone time_zone
time_zone_leap_second time_zone_leap_second
time_zone_name time_zone_name
time_zone_transition time_zone_transition
time_zone_transition_type time_zone_transition_type
t1 t1
t4 t4
t2 t2
t3 t3
t5 t5
select c,table_name from v1
left join information_schema.TABLES v2 on (v1.c=v2.table_name)
where v1.c like "t%";
c table_name
TABLES TABLES
TABLE_CONSTRAINTS TABLE_CONSTRAINTS
TABLE_PRIVILEGES TABLE_PRIVILEGES
TABLE_STATISTICS TABLE_STATISTICS
TRIGGERS TRIGGERS
tables_priv tables_priv
time_zone time_zone
time_zone_leap_second time_zone_leap_second
time_zone_name time_zone_name
time_zone_transition time_zone_transition
time_zone_transition_type time_zone_transition_type
t1 t1
t4 t4
t2 t2
t3 t3
t5 t5
select c, v2.table_name from v1
right join information_schema.TABLES v2 on (v1.c=v2.table_name)
where v1.c like "t%";
c table_name
TABLES TABLES
TABLE_CONSTRAINTS TABLE_CONSTRAINTS
TABLE_PRIVILEGES TABLE_PRIVILEGES
TABLE_STATISTICS TABLE_STATISTICS
TRIGGERS TRIGGERS
tables_priv tables_priv
time_zone time_zone
time_zone_leap_second time_zone_leap_second
time_zone_name time_zone_name
time_zone_transition time_zone_transition
time_zone_transition_type time_zone_transition_type
t1 t1
t4 t4
t2 t2
t3 t3
t5 t5
select table_name from information_schema.TABLES
where table_schema = "mysqltest" and table_name like "t%";
table_name
t1
t4
select * from information_schema.STATISTICS where TABLE_SCHEMA = "mysqltest";
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLUMN_NAME COLLATION CARDINALITY SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT
NULL mysqltest t1 1 mysqltest string_data 1 b A NULL NULL NULL YES BTREE
show keys from t3 where Key_name = "a_data";
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
t3 1 a_data 1 a A NULL NULL NULL YES BTREE
show tables like 't%';
Tables_in_test (t%)
t2
t3
t5
show table status;
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t2 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
t3 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
t5 MyISAM 10 Fixed 1 7 7 # 2048 0 11 # # NULL latin1_swedish_ci NULL
v1 NULL NULL NULL NULL NULL NULL # NULL NULL NULL # # NULL NULL NULL NULL VIEW
show full columns from t3 like "a%";
Field Type Collation Null Key Default Extra Privileges Comment
a int(11) NULL YES MUL NULL select,insert,update,references
show full columns from mysql.db like "Insert%";
Field Type Collation Null Key Default Extra Privileges Comment
Insert_priv enum('N','Y') utf8_general_ci NO N select,insert,update,references
show full columns from v1;
Field Type Collation Null Key Default Extra Privileges Comment
c varchar(64) utf8_general_ci NO select,insert,update,references
select * from information_schema.COLUMNS where table_name="t1"
and column_name= "a";
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 CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
NULL mysqltest t1 a 1 NULL YES int NULL NULL 10 0 NULL NULL int(11) select,insert,update,references
show columns from mysqltest.t1 where field like "%a%";
Field Type Null Key Default Extra
a int(11) YES NULL
create view mysqltest.v1 (c) as select a from mysqltest.t1;
grant select (a) on mysqltest.t1 to mysqltest_2@localhost;
grant select on mysqltest.v1 to mysqltest_3;
select table_name, column_name, privileges from information_schema.columns
where table_schema = 'mysqltest' and table_name = 't1';
table_name column_name privileges
t1 a select
show columns from mysqltest.t1;
Field Type Null Key Default Extra
a int(11) YES NULL
select table_name, column_name, privileges from information_schema.columns
where table_schema = 'mysqltest' and table_name = 'v1';
table_name column_name privileges
v1 c select
explain select * from v1;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
drop view v1, mysqltest.v1;
drop tables mysqltest.t4, mysqltest.t1, t2, t3, t5;
drop database mysqltest;
select * from information_schema.CHARACTER_SETS
where CHARACTER_SET_NAME like 'latin1%';
CHARACTER_SET_NAME DEFAULT_COLLATE_NAME DESCRIPTION MAXLEN
latin1 latin1_swedish_ci cp1252 West European 1
SHOW CHARACTER SET LIKE 'latin1%';
Charset Description Default collation Maxlen
latin1 cp1252 West European latin1_swedish_ci 1
SHOW CHARACTER SET WHERE charset like 'latin1%';
Charset Description Default collation Maxlen
latin1 cp1252 West European latin1_swedish_ci 1
select * from information_schema.COLLATIONS
where COLLATION_NAME like 'latin1%';
COLLATION_NAME CHARACTER_SET_NAME ID IS_DEFAULT IS_COMPILED SORTLEN
latin1_german1_ci latin1 5 # 1
latin1_swedish_ci latin1 8 Yes # 1
latin1_danish_ci latin1 15 # 1
latin1_german2_ci latin1 31 # 2
latin1_bin latin1 47 # 1
latin1_general_ci latin1 48 # 1
latin1_general_cs latin1 49 # 1
latin1_spanish_ci latin1 94 # 1
SHOW COLLATION LIKE 'latin1%';
Collation Charset Id Default Compiled Sortlen
latin1_german1_ci latin1 5 # 1
latin1_swedish_ci latin1 8 Yes # 1
latin1_danish_ci latin1 15 # 1
latin1_german2_ci latin1 31 # 2
latin1_bin latin1 47 # 1
latin1_general_ci latin1 48 # 1
latin1_general_cs latin1 49 # 1
latin1_spanish_ci latin1 94 # 1
SHOW COLLATION WHERE collation like 'latin1%';
Collation Charset Id Default Compiled Sortlen
latin1_german1_ci latin1 5 # 1
latin1_swedish_ci latin1 8 Yes # 1
latin1_danish_ci latin1 15 # 1
latin1_german2_ci latin1 31 # 2
latin1_bin latin1 47 # 1
latin1_general_ci latin1 48 # 1
latin1_general_cs latin1 49 # 1
latin1_spanish_ci latin1 94 # 1
select * from information_schema.COLLATION_CHARACTER_SET_APPLICABILITY
where COLLATION_NAME like 'latin1%';
COLLATION_NAME CHARACTER_SET_NAME
latin1_german1_ci latin1
latin1_swedish_ci latin1
latin1_danish_ci latin1
latin1_german2_ci latin1
latin1_bin latin1
latin1_general_ci latin1
latin1_general_cs latin1
latin1_spanish_ci latin1
drop procedure if exists sel2;
drop function if exists sub1;
drop function if exists sub2;
create function sub1(i int) returns int
return i+1;
create procedure sel2()
begin
select * from t1;
select * from t2;
end|
select parameter_style, sql_data_access, dtd_identifier
from information_schema.routines where routine_schema='test';
parameter_style sql_data_access dtd_identifier
SQL CONTAINS SQL NULL
SQL CONTAINS SQL int(11)
show procedure status where db='test';
Db Name Type Definer Modified Created Security_type Comment character_set_client collation_connection Database Collation
test sel2 PROCEDURE root@localhost # # DEFINER latin1 latin1_swedish_ci latin1_swedish_ci
show function status where db='test';
Db Name Type Definer Modified Created Security_type Comment character_set_client collation_connection Database Collation
test sub1 FUNCTION root@localhost # # DEFINER latin1 latin1_swedish_ci latin1_swedish_ci
select a.ROUTINE_NAME from information_schema.ROUTINES a,
information_schema.SCHEMATA b where
a.ROUTINE_SCHEMA = b.SCHEMA_NAME AND b.SCHEMA_NAME='test';
ROUTINE_NAME
sel2
sub1
explain select a.ROUTINE_NAME from information_schema.ROUTINES a,
information_schema.SCHEMATA b where
a.ROUTINE_SCHEMA = b.SCHEMA_NAME;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE # ALL NULL NULL NULL NULL NULL
1 SIMPLE # ALL NULL NULL NULL NULL NULL Using where; Using join buffer (flat, BNL join)
select a.ROUTINE_NAME, b.name from information_schema.ROUTINES a,
mysql.proc b where a.ROUTINE_NAME = convert(b.name using utf8) AND a.ROUTINE_SCHEMA='test' order by 1;
ROUTINE_NAME name
sel2 sel2
sub1 sub1
select count(*) from information_schema.ROUTINES where routine_schema='test';
count(*)
2
create view v1 as select routine_schema, routine_name from information_schema.routines where routine_schema='test'
order by routine_schema, routine_name;
select * from v1;
routine_schema routine_name
test sel2
test sub1
drop view v1;
select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
ROUTINE_NAME ROUTINE_DEFINITION
show create function sub1;
ERROR 42000: FUNCTION sub1 does not exist
select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
ROUTINE_NAME ROUTINE_DEFINITION
sel2 NULL
sub1 NULL
grant all privileges on test.* to mysqltest_1@localhost;
select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
ROUTINE_NAME ROUTINE_DEFINITION
sel2 NULL
sub1 NULL
create function sub2(i int) returns int
return i+1;
select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
ROUTINE_NAME ROUTINE_DEFINITION
sel2 NULL
sub1 NULL
sub2 return i+1
show create procedure sel2;
Procedure sql_mode Create Procedure character_set_client collation_connection Database Collation
sel2 NULL latin1 latin1_swedish_ci latin1_swedish_ci
show create function sub1;
Function sql_mode Create Function character_set_client collation_connection Database Collation
sub1 NULL latin1 latin1_swedish_ci latin1_swedish_ci
show create function sub2;
Function sql_mode Create Function character_set_client collation_connection Database Collation
sub2 CREATE DEFINER=`mysqltest_1`@`localhost` FUNCTION `sub2`(i int) RETURNS int(11)
return i+1 latin1 latin1_swedish_ci latin1_swedish_ci
show function status like "sub2";
Db Name Type Definer Modified Created Security_type Comment character_set_client collation_connection Database Collation
test sub2 FUNCTION mysqltest_1@localhost # # DEFINER latin1 latin1_swedish_ci latin1_swedish_ci
drop function sub2;
show create procedure sel2;
Procedure sql_mode Create Procedure character_set_client collation_connection Database Collation
sel2 CREATE DEFINER=`root`@`localhost` PROCEDURE `sel2`()
begin
select * from t1;
select * from t2;
end latin1 latin1_swedish_ci latin1_swedish_ci
create view v0 (c) as select schema_name from information_schema.schemata;
select * from v0;
c
information_schema
mtr
mysql
test
explain select * from v0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE # ALL NULL NULL NULL NULL NULL
create view v1 (c) as select table_name from information_schema.tables
where table_name="v1";
select * from v1;
c
v1
create view v2 (c) as select column_name from information_schema.columns
where table_name="v2";
select * from v2;
c
c
create view v3 (c) as select CHARACTER_SET_NAME from information_schema.character_sets
where CHARACTER_SET_NAME like "latin1%";
select * from v3;
c
latin1
create view v4 (c) as select COLLATION_NAME from information_schema.collations
where COLLATION_NAME like "latin1%";
select * from v4;
c
latin1_german1_ci
latin1_swedish_ci
latin1_danish_ci
latin1_german2_ci
latin1_bin
latin1_general_ci
latin1_general_cs
latin1_spanish_ci
show keys from v4;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
select * from information_schema.views where TABLE_NAME like "v%";
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
NULL test v0 select `schemata`.`SCHEMA_NAME` AS `c` from `information_schema`.`schemata` NONE NO root@localhost DEFINER latin1 latin1_swedish_ci
NULL test v1 select `tables`.`TABLE_NAME` AS `c` from `information_schema`.`tables` where (`tables`.`TABLE_NAME` = 'v1') NONE NO root@localhost DEFINER latin1 latin1_swedish_ci
NULL test v2 select `columns`.`COLUMN_NAME` AS `c` from `information_schema`.`columns` where (`columns`.`TABLE_NAME` = 'v2') NONE NO root@localhost DEFINER latin1 latin1_swedish_ci
NULL test v3 select `character_sets`.`CHARACTER_SET_NAME` AS `c` from `information_schema`.`character_sets` where (`character_sets`.`CHARACTER_SET_NAME` like 'latin1%') NONE NO root@localhost DEFINER latin1 latin1_swedish_ci
NULL test v4 select `collations`.`COLLATION_NAME` AS `c` from `information_schema`.`collations` where (`collations`.`COLLATION_NAME` like 'latin1%') NONE NO root@localhost DEFINER latin1 latin1_swedish_ci
drop view v0, v1, v2, v3, v4;
create table t1 (a int);
grant select,update,insert on t1 to mysqltest_1@localhost;
grant select (a), update (a),insert(a), references(a) on t1 to mysqltest_1@localhost;
grant all on test.* to mysqltest_1@localhost with grant option;
select * from information_schema.USER_PRIVILEGES where grantee like '%mysqltest_1%';
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
'mysqltest_1'@'localhost' NULL USAGE NO
select * from information_schema.SCHEMA_PRIVILEGES where grantee like '%mysqltest_1%';
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
'mysqltest_1'@'localhost' NULL test SELECT YES
'mysqltest_1'@'localhost' NULL test INSERT YES
'mysqltest_1'@'localhost' NULL test UPDATE YES
'mysqltest_1'@'localhost' NULL test DELETE YES
'mysqltest_1'@'localhost' NULL test CREATE YES
'mysqltest_1'@'localhost' NULL test DROP YES
'mysqltest_1'@'localhost' NULL test REFERENCES YES
'mysqltest_1'@'localhost' NULL test INDEX YES
'mysqltest_1'@'localhost' NULL test ALTER YES
'mysqltest_1'@'localhost' NULL test CREATE TEMPORARY TABLES YES
'mysqltest_1'@'localhost' NULL test LOCK TABLES YES
'mysqltest_1'@'localhost' NULL test EXECUTE YES
'mysqltest_1'@'localhost' NULL test CREATE VIEW YES
'mysqltest_1'@'localhost' NULL test SHOW VIEW YES
'mysqltest_1'@'localhost' NULL test CREATE ROUTINE YES
'mysqltest_1'@'localhost' NULL test ALTER ROUTINE YES
'mysqltest_1'@'localhost' NULL test EVENT YES
'mysqltest_1'@'localhost' NULL test TRIGGER YES
select * from information_schema.TABLE_PRIVILEGES where grantee like '%mysqltest_1%';
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
'mysqltest_1'@'localhost' NULL test t1 SELECT NO
'mysqltest_1'@'localhost' NULL test t1 INSERT NO
'mysqltest_1'@'localhost' NULL test t1 UPDATE NO
select * from information_schema.COLUMN_PRIVILEGES where grantee like '%mysqltest_1%';
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
'mysqltest_1'@'localhost' NULL test t1 a SELECT NO
'mysqltest_1'@'localhost' NULL test t1 a INSERT NO
'mysqltest_1'@'localhost' NULL test t1 a UPDATE NO
'mysqltest_1'@'localhost' NULL test t1 a REFERENCES NO
delete from mysql.user where user like 'mysqltest%';
delete from mysql.db where user like 'mysqltest%';
delete from mysql.tables_priv where user like 'mysqltest%';
delete from mysql.columns_priv where user like 'mysqltest%';
flush privileges;
drop table t1;
create table t1 (a int null, primary key(a));
alter table t1 add constraint constraint_1 unique (a);
alter table t1 add constraint unique key_1(a);
alter table t1 add constraint constraint_2 unique key_2(a);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL DEFAULT '0',
PRIMARY KEY (`a`),
UNIQUE KEY `constraint_1` (`a`),
UNIQUE KEY `key_1` (`a`),
UNIQUE KEY `key_2` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select * from information_schema.TABLE_CONSTRAINTS where
TABLE_SCHEMA= "test";
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
NULL test PRIMARY test t1 PRIMARY KEY
NULL test constraint_1 test t1 UNIQUE
NULL test key_1 test t1 UNIQUE
NULL test key_2 test t1 UNIQUE
select * from information_schema.KEY_COLUMN_USAGE where
TABLE_SCHEMA= "test";
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
NULL test PRIMARY NULL test t1 a 1 NULL NULL NULL NULL
NULL test constraint_1 NULL test t1 a 1 NULL NULL NULL NULL
NULL test key_1 NULL test t1 a 1 NULL NULL NULL NULL
NULL test key_2 NULL test t1 a 1 NULL NULL NULL NULL
select table_name from information_schema.TABLES where table_schema like "test%";
table_name
t1
select table_name,column_name from information_schema.COLUMNS where table_schema like "test%";
table_name column_name
t1 a
select ROUTINE_NAME from information_schema.ROUTINES;
ROUTINE_NAME
sel2
sub1
delete from mysql.user where user='mysqltest_1';
drop table t1;
drop procedure sel2;
drop function sub1;
create table t1(a int);
create view v1 (c) as select a from t1 with check option;
create view v2 (c) as select a from t1 WITH LOCAL CHECK OPTION;
create view v3 (c) as select a from t1 WITH CASCADED CHECK OPTION;
select * from information_schema.views;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
NULL test v1 select `test`.`t1`.`a` AS `c` from `test`.`t1` CASCADED YES root@localhost DEFINER latin1 latin1_swedish_ci
NULL test v2 select `test`.`t1`.`a` AS `c` from `test`.`t1` LOCAL YES root@localhost DEFINER latin1 latin1_swedish_ci
NULL test v3 select `test`.`t1`.`a` AS `c` from `test`.`t1` CASCADED YES root@localhost DEFINER latin1 latin1_swedish_ci
grant select (a) on test.t1 to joe@localhost with grant option;
select * from INFORMATION_SCHEMA.COLUMN_PRIVILEGES;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
'joe'@'localhost' NULL test t1 a SELECT YES
select * from INFORMATION_SCHEMA.TABLE_PRIVILEGES;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
drop view v1, v2, v3;
drop table t1;
delete from mysql.user where user='joe';
delete from mysql.db where user='joe';
delete from mysql.tables_priv where user='joe';
delete from mysql.columns_priv where user='joe';
flush privileges;
create table t1 (a int not null auto_increment,b int, primary key (a));
insert into t1 values (1,1),(NULL,3),(NULL,4);
select AUTO_INCREMENT from information_schema.tables where table_name = 't1';
AUTO_INCREMENT
4
drop table t1;
create table t1 (s1 int);
insert into t1 values (0),(9),(0);
select s1 from t1 where s1 in (select version from
information_schema.tables) union select version from
information_schema.tables;
s1
10
drop table t1;
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 '',
`DEFAULT_COLLATE_NAME` varchar(32) NOT NULL DEFAULT '',
`DESCRIPTION` varchar(60) NOT NULL DEFAULT '',
`MAXLEN` bigint(3) NOT NULL DEFAULT '0'
) ENGINE=MEMORY DEFAULT CHARSET=utf8
set names latin2;
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 '',
`DEFAULT_COLLATE_NAME` varchar(32) NOT NULL DEFAULT '',
`DESCRIPTION` varchar(60) NOT NULL DEFAULT '',
`MAXLEN` bigint(3) NOT NULL DEFAULT '0'
) ENGINE=MEMORY DEFAULT CHARSET=utf8
set names latin1;
create table t1 select * from information_schema.CHARACTER_SETS
where CHARACTER_SET_NAME like "latin1";
select * from t1;
CHARACTER_SET_NAME DEFAULT_COLLATE_NAME DESCRIPTION MAXLEN
latin1 latin1_swedish_ci cp1252 West European 1
alter table t1 default character set utf8;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`CHARACTER_SET_NAME` varchar(32) NOT NULL DEFAULT '',
`DEFAULT_COLLATE_NAME` varchar(32) NOT NULL DEFAULT '',
`DESCRIPTION` varchar(60) NOT NULL DEFAULT '',
`MAXLEN` bigint(3) NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=utf8
drop table t1;
create view v1 as select * from information_schema.TABLES;
drop view v1;
create table t1(a NUMERIC(5,3), b NUMERIC(5,1), c float(5,2),
d NUMERIC(6,4), e float, f DECIMAL(6,3), g int(11), h DOUBLE(10,3),
i DOUBLE);
select COLUMN_NAME,COLUMN_TYPE, CHARACTER_MAXIMUM_LENGTH,
CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION, NUMERIC_SCALE
from information_schema.columns where table_name= 't1';
COLUMN_NAME COLUMN_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE
a decimal(5,3) NULL NULL 5 3
b decimal(5,1) NULL NULL 5 1
c float(5,2) NULL NULL 5 2
d decimal(6,4) NULL NULL 6 4
e float NULL NULL 12 NULL
f decimal(6,3) NULL NULL 6 3
g int(11) NULL NULL 10 0
h double(10,3) NULL NULL 10 3
i double NULL NULL 22 NULL
drop table t1;
create table t115 as select table_name, column_name, column_type
from information_schema.columns where table_name = 'proc';
select * from t115;
table_name column_name column_type
proc db char(64)
proc name char(64)
proc type enum('FUNCTION','PROCEDURE')
proc specific_name char(64)
proc language enum('SQL')
proc sql_data_access enum('CONTAINS_SQL','NO_SQL','READS_SQL_DATA','MODIFIES_SQL_DATA')
proc is_deterministic enum('YES','NO')
proc security_type enum('INVOKER','DEFINER')
proc param_list blob
proc returns longblob
proc body longblob
proc definer char(77)
proc created timestamp
proc modified timestamp
proc sql_mode set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES','IGNORE_SPACE','IGNORE_BAD_TABLE_OPTIONS','ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION','NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB','NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40','ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES','STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES','ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER','HIGH_NOT_PRECEDENCE','NO_ENGINE_SUBSTITUTION','PAD_CHAR_TO_FULL_LENGTH')
proc comment char(64)
proc character_set_client char(32)
proc collation_connection char(32)
proc db_collation char(32)
proc body_utf8 longblob
drop table t115;
create procedure p108 () begin declare c cursor for select data_type
from information_schema.columns; open c; open c; end;//
call p108()//
ERROR 24000: Cursor is already open
drop procedure p108;
create view v1 as select A1.table_name from information_schema.TABLES A1
where table_name= "user";
select * from v1;
table_name
user
drop view v1;
create view vo as select 'a' union select 'a';
show index from vo;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
select * from information_schema.TABLE_CONSTRAINTS where
TABLE_NAME= "vo";
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
select * from information_schema.KEY_COLUMN_USAGE where
TABLE_NAME= "vo";
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
drop view vo;
select TABLE_NAME,TABLE_TYPE,ENGINE
from information_schema.tables
where table_schema='information_schema' limit 2;
TABLE_NAME TABLE_TYPE ENGINE
CHARACTER_SETS SYSTEM VIEW MEMORY
CLIENT_STATISTICS SYSTEM VIEW MEMORY
show tables from information_schema like "T%";
Tables_in_information_schema (T%)
TABLES
TABLE_CONSTRAINTS
TABLE_PRIVILEGES
TABLE_STATISTICS
TRIGGERS
create database information_schema;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
use information_schema;
show full tables like "T%";
Tables_in_information_schema (T%) Table_type
TABLES SYSTEM VIEW
TABLE_CONSTRAINTS SYSTEM VIEW
TABLE_PRIVILEGES SYSTEM VIEW
TABLE_STATISTICS SYSTEM VIEW
TRIGGERS SYSTEM VIEW
create table t1(a int);
ERROR 42S02: Unknown table 't1' in information_schema
use test;
show tables;
Tables_in_test
use information_schema;
show tables like "T%";
Tables_in_information_schema (T%)
TABLES
TABLE_CONSTRAINTS
TABLE_PRIVILEGES
TABLE_STATISTICS
TRIGGERS
select table_name from tables where table_name='user';
table_name
user
select column_name, privileges from columns
where table_name='user' and column_name like '%o%';
column_name privileges
Host select,insert,update,references
Password select,insert,update,references
Drop_priv select,insert,update,references
Reload_priv select,insert,update,references
Shutdown_priv select,insert,update,references
Process_priv select,insert,update,references
Show_db_priv select,insert,update,references
Lock_tables_priv select,insert,update,references
Show_view_priv select,insert,update,references
Create_routine_priv select,insert,update,references
Alter_routine_priv select,insert,update,references
max_questions select,insert,update,references
max_connections select,insert,update,references
max_user_connections select,insert,update,references
use test;
create function sub1(i int) returns int
return i+1;
create table t1(f1 int);
create view v2 (c) as select f1 from t1;
create view v3 (c) as select sub1(1);
create table t4(f1 int, KEY f1_key (f1));
drop table t1;
drop function sub1;
select table_name from information_schema.views
where table_schema='test';
table_name
v2
v3
select table_name from information_schema.views
where table_schema='test';
table_name
v2
v3
select column_name from information_schema.columns
where table_schema='test';
column_name
f1
Warnings:
Warning 1356 View 'test.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
Warning 1356 View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
select index_name from information_schema.statistics where table_schema='test';
index_name
f1_key
select constraint_name from information_schema.table_constraints
where table_schema='test';
constraint_name
show create view v2;
View Create View character_set_client collation_connection
v2 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v2` AS select `test`.`t1`.`f1` AS `c` from `t1` latin1 latin1_swedish_ci
Warnings:
Warning 1356 View 'test.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
show create table v3;
View Create View character_set_client collation_connection
v3 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v3` AS select `sub1`(1) AS `c` latin1 latin1_swedish_ci
Warnings:
Warning 1356 View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
drop view v2;
drop view v3;
drop table t4;
select * from information_schema.table_names;
ERROR 42S02: Unknown table 'table_names' in information_schema
select column_type from information_schema.columns
where table_schema="information_schema" and table_name="COLUMNS" and
(column_name="character_set_name" or column_name="collation_name");
column_type
varchar(32)
varchar(32)
select TABLE_ROWS from information_schema.tables where
table_schema="information_schema" and table_name="COLUMNS";
TABLE_ROWS
NULL
select table_type from information_schema.tables
where table_schema="mysql" and table_name="user";
table_type
BASE TABLE
show open tables where `table` like "user";
Database Table In_use Name_locked
mysql user 0 0
show status where variable_name like "%database%";
Variable_name Value
Com_show_databases 3
show variables where variable_name like "skip_show_databas";
Variable_name Value
show global status like "Threads_running";
Variable_name Value
Threads_running #
create table t1(f1 int);
create table t2(f2 int);
create view v1 as select * from t1, t2;
set @got_val= (select count(*) from information_schema.columns);
drop view v1;
drop table t1, t2;
use test;
CREATE TABLE t_crashme ( f1 BIGINT);
CREATE VIEW a1 (t_CRASHME) AS SELECT f1 FROM t_crashme GROUP BY f1;
CREATE VIEW a2 AS SELECT t_CRASHME FROM a1;
count(*)
68
drop view a2, a1;
drop table t_crashme;
select table_schema,table_name, column_name from
information_schema.columns
where data_type = 'longtext';
table_schema table_name column_name
information_schema COLUMNS COLUMN_DEFAULT
information_schema COLUMNS COLUMN_TYPE
information_schema EVENTS EVENT_DEFINITION
information_schema PARTITIONS PARTITION_EXPRESSION
information_schema PARTITIONS SUBPARTITION_EXPRESSION
information_schema PARTITIONS PARTITION_DESCRIPTION
information_schema PLUGINS PLUGIN_DESCRIPTION
information_schema PROCESSLIST INFO
information_schema ROUTINES ROUTINE_DEFINITION
information_schema TRIGGERS ACTION_CONDITION
information_schema TRIGGERS ACTION_STATEMENT
information_schema VIEWS VIEW_DEFINITION
select table_name, column_name, data_type from information_schema.columns
where data_type = 'datetime';
table_name column_name data_type
EVENTS EXECUTE_AT datetime
EVENTS STARTS datetime
EVENTS ENDS datetime
EVENTS CREATED datetime
EVENTS LAST_ALTERED datetime
EVENTS LAST_EXECUTED datetime
FILES CREATION_TIME datetime
FILES LAST_UPDATE_TIME datetime
FILES LAST_ACCESS_TIME datetime
FILES CREATE_TIME datetime
FILES UPDATE_TIME datetime
FILES CHECK_TIME datetime
PARTITIONS CREATE_TIME datetime
PARTITIONS UPDATE_TIME datetime
PARTITIONS CHECK_TIME datetime
ROUTINES CREATED datetime
ROUTINES LAST_ALTERED datetime
TABLES CREATE_TIME datetime
TABLES UPDATE_TIME datetime
TABLES CHECK_TIME datetime
TRIGGERS CREATED datetime
INNODB_TRX trx_started datetime
INNODB_TRX trx_wait_started datetime
event execute_at datetime
event last_executed datetime
event starts datetime
event ends datetime
SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES A
WHERE NOT EXISTS
(SELECT * FROM INFORMATION_SCHEMA.COLUMNS B
WHERE A.TABLE_SCHEMA = B.TABLE_SCHEMA
AND A.TABLE_NAME = B.TABLE_NAME);
COUNT(*)
0
create table t1
( x_bigint BIGINT,
x_integer INTEGER,
x_smallint SMALLINT,
x_decimal DECIMAL(5,3),
x_numeric NUMERIC(5,3),
x_real REAL,
x_float FLOAT,
x_double_precision DOUBLE PRECISION );
SELECT COLUMN_NAME, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME= 't1';
COLUMN_NAME CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH
x_bigint NULL NULL
x_integer NULL NULL
x_smallint NULL NULL
x_decimal NULL NULL
x_numeric NULL NULL
x_real NULL NULL
x_float NULL NULL
x_double_precision NULL NULL
drop table t1;
grant select on test.* to mysqltest_4@localhost;
SELECT TABLE_NAME, COLUMN_NAME, PRIVILEGES FROM INFORMATION_SCHEMA.COLUMNS
where COLUMN_NAME='TABLE_NAME';
TABLE_NAME COLUMN_NAME PRIVILEGES
COLUMNS TABLE_NAME select
COLUMN_PRIVILEGES TABLE_NAME select
FILES TABLE_NAME select
INDEX_STATISTICS TABLE_NAME select
INNODB_INDEX_STATS table_name select
INNODB_TABLE_STATS table_name select
KEY_COLUMN_USAGE TABLE_NAME select
PARTITIONS TABLE_NAME select
REFERENTIAL_CONSTRAINTS TABLE_NAME select
STATISTICS TABLE_NAME select
TABLES TABLE_NAME select
TABLE_CONSTRAINTS TABLE_NAME select
TABLE_PRIVILEGES TABLE_NAME select
TABLE_STATISTICS TABLE_NAME select
VIEWS TABLE_NAME select
delete from mysql.user where user='mysqltest_4';
delete from mysql.db where user='mysqltest_4';
flush privileges;
create table t1 (i int, j int);
create trigger trg1 before insert on t1 for each row
begin
if new.j > 10 then
set new.j := 10;
end if;
end|
create trigger trg2 before update on t1 for each row
begin
if old.i % 2 = 0 then
set new.j := -1;
end if;
end|
create trigger trg3 after update on t1 for each row
begin
if new.j = -1 then
set @fired:= "Yes";
end if;
end|
show triggers;
Trigger Event Table Statement Timing Created sql_mode Definer character_set_client collation_connection Database Collation
trg1 INSERT t1 begin
if new.j > 10 then
set new.j := 10;
end if;
end BEFORE NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
trg2 UPDATE t1 begin
if old.i % 2 = 0 then
set new.j := -1;
end if;
end BEFORE NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
trg3 UPDATE t1 begin
if new.j = -1 then
set @fired:= "Yes";
end if;
end AFTER NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
select * from information_schema.triggers where trigger_schema in ('mysql', 'information_schema', 'test', 'mysqltest');
TRIGGER_CATALOG TRIGGER_SCHEMA TRIGGER_NAME EVENT_MANIPULATION EVENT_OBJECT_CATALOG EVENT_OBJECT_SCHEMA EVENT_OBJECT_TABLE ACTION_ORDER ACTION_CONDITION ACTION_STATEMENT ACTION_ORIENTATION ACTION_TIMING ACTION_REFERENCE_OLD_TABLE ACTION_REFERENCE_NEW_TABLE ACTION_REFERENCE_OLD_ROW ACTION_REFERENCE_NEW_ROW CREATED SQL_MODE DEFINER CHARACTER_SET_CLIENT COLLATION_CONNECTION DATABASE_COLLATION
NULL test trg1 INSERT NULL test t1 0 NULL begin
if new.j > 10 then
set new.j := 10;
end if;
end ROW BEFORE NULL NULL OLD NEW NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
NULL test trg2 UPDATE NULL test t1 0 NULL begin
if old.i % 2 = 0 then
set new.j := -1;
end if;
end ROW BEFORE NULL NULL OLD NEW NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
NULL test trg3 UPDATE NULL test t1 0 NULL begin
if new.j = -1 then
set @fired:= "Yes";
end if;
end ROW AFTER NULL NULL OLD NEW NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
drop trigger trg1;
drop trigger trg2;
drop trigger trg3;
drop table t1;
create database mysqltest;
create table mysqltest.t1 (f1 int, f2 int);
create table mysqltest.t2 (f1 int);
grant select (f1) on mysqltest.t1 to user1@localhost;
grant select on mysqltest.t2 to user2@localhost;
grant select on mysqltest.* to user3@localhost;
grant select on *.* to user4@localhost;
select * from information_schema.column_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
'user1'@'localhost' NULL mysqltest t1 f1 SELECT NO
select * from information_schema.table_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
select * from information_schema.schema_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
select * from information_schema.user_privileges order by grantee;
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
'user1'@'localhost' NULL USAGE NO
show grants;
Grants for user1@localhost
GRANT USAGE ON *.* TO 'user1'@'localhost'
GRANT SELECT (f1) ON `mysqltest`.`t1` TO 'user1'@'localhost'
select * from information_schema.column_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
select * from information_schema.table_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
'user2'@'localhost' NULL mysqltest t2 SELECT NO
select * from information_schema.schema_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
select * from information_schema.user_privileges order by grantee;
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
'user2'@'localhost' NULL USAGE NO
show grants;
Grants for user2@localhost
GRANT USAGE ON *.* TO 'user2'@'localhost'
GRANT SELECT ON `mysqltest`.`t2` TO 'user2'@'localhost'
select * from information_schema.column_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
select * from information_schema.table_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
select * from information_schema.schema_privileges order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
'user3'@'localhost' NULL mysqltest SELECT NO
select * from information_schema.user_privileges order by grantee;
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
'user3'@'localhost' NULL USAGE NO
show grants;
Grants for user3@localhost
GRANT USAGE ON *.* TO 'user3'@'localhost'
GRANT SELECT ON `mysqltest`.* TO 'user3'@'localhost'
select * from information_schema.column_privileges where grantee like '%user%'
order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
'user1'@'localhost' NULL mysqltest t1 f1 SELECT NO
select * from information_schema.table_privileges where grantee like '%user%'
order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
'user2'@'localhost' NULL mysqltest t2 SELECT NO
select * from information_schema.schema_privileges where grantee like '%user%'
order by grantee;
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
'user3'@'localhost' NULL mysqltest SELECT NO
select * from information_schema.user_privileges where grantee like '%user%'
order by grantee;
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
'user1'@'localhost' NULL USAGE NO
'user2'@'localhost' NULL USAGE NO
'user3'@'localhost' NULL USAGE NO
'user4'@'localhost' NULL SELECT NO
show grants;
Grants for user4@localhost
GRANT SELECT ON *.* TO 'user4'@'localhost'
drop user user1@localhost, user2@localhost, user3@localhost, user4@localhost;
use test;
drop database mysqltest;
drop procedure if exists p1;
drop procedure if exists p2;
create procedure p1 () modifies sql data set @a = 5;
create procedure p2 () set @a = 5;
select sql_data_access from information_schema.routines
where specific_name like 'p%';
sql_data_access
MODIFIES SQL DATA
CONTAINS SQL
drop procedure p1;
drop procedure p2;
show create database information_schema;
Database Create Database
information_schema CREATE DATABASE `information_schema` /*!40100 DEFAULT CHARACTER SET utf8 */
create table t1(f1 LONGBLOB, f2 LONGTEXT);
select column_name,data_type,CHARACTER_OCTET_LENGTH,
CHARACTER_MAXIMUM_LENGTH
from information_schema.columns
where table_name='t1';
column_name data_type CHARACTER_OCTET_LENGTH CHARACTER_MAXIMUM_LENGTH
f1 longblob 4294967295 4294967295
f2 longtext 4294967295 4294967295
drop table t1;
create table t1(f1 tinyint, f2 SMALLINT, f3 mediumint, f4 int,
f5 BIGINT, f6 BIT, f7 bit(64));
select column_name, NUMERIC_PRECISION, NUMERIC_SCALE
from information_schema.columns
where table_name='t1';
column_name NUMERIC_PRECISION NUMERIC_SCALE
f1 3 0
f2 5 0
f3 7 0
f4 10 0
f5 19 0
f6 1 NULL
f7 64 NULL
drop table t1;
create table t1 (f1 integer);
create trigger tr1 after insert on t1 for each row set @test_var=42;
use information_schema;
select trigger_schema, trigger_name from triggers where
trigger_name='tr1';
trigger_schema trigger_name
test tr1
use test;
drop table t1;
create table t1 (a int not null, b int);
use information_schema;
select column_name, column_default from columns
where table_schema='test' and table_name='t1';
column_name column_default
a NULL
b NULL
use test;
show columns from t1;
Field Type Null Key Default Extra
a int(11) NO NULL
b int(11) YES NULL
drop table t1;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int);
SHOW TABLE STATUS FROM test
WHERE name IN ( SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA='test' AND TABLE_TYPE='BASE TABLE');
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
t2 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
DROP TABLE t1,t2;
create table t1(f1 int);
create view v1 (c) as select f1 from t1;
select database();
database()
NULL
show fields from test.v1;
Field Type Null Key Default Extra
c int(11) YES NULL
drop view v1;
drop table t1;
alter database information_schema;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
drop database information_schema;
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;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
use information_schema;
create temporary table schemata(f1 char(10));
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE PROCEDURE p1 ()
BEGIN
SELECT 'foo' FROM DUAL;
END |
ERROR 42000: Unknown database 'information_schema'
select ROUTINE_NAME from routines where ROUTINE_SCHEMA='information_schema';
ROUTINE_NAME
grant all on information_schema.* to 'user1'@'localhost';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
grant select on information_schema.* to 'user1'@'localhost';
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
use test;
create table t1(id int);
insert into t1(id) values (1);
select 1 from (select 1 from test.t1) a;
1
1
use information_schema;
select 1 from (select 1 from test.t1) a;
1
1
use test;
drop table t1;
create table t1 (f1 int(11));
create view v1 as select * from t1;
drop table t1;
select table_type from information_schema.tables
where table_name="v1";
table_type
VIEW
drop view v1;
create temporary table t1(f1 int, index(f1));
show columns from t1;
Field Type Null Key Default Extra
f1 int(11) YES MUL NULL
describe t1;
Field Type Null Key Default Extra
f1 int(11) YES MUL NULL
show indexes from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
t1 1 f1 1 f1 A NULL NULL NULL YES BTREE
drop table t1;
create table t1(f1 binary(32), f2 varbinary(64));
select character_maximum_length, character_octet_length
from information_schema.columns where table_name='t1';
character_maximum_length character_octet_length
32 32
64 64
drop table t1;
CREATE TABLE t1 (f1 BIGINT, f2 VARCHAR(20), f3 BIGINT);
INSERT INTO t1 SET f1 = 1, f2 = 'Schoenenbourg', f3 = 1;
CREATE FUNCTION func2() RETURNS BIGINT RETURN 1;
CREATE FUNCTION func1() RETURNS BIGINT
BEGIN
RETURN ( SELECT COUNT(*) FROM INFORMATION_SCHEMA.VIEWS);
END//
CREATE VIEW v1 AS SELECT 1 FROM t1
WHERE f3 = (SELECT func2 ());
SELECT func1();
func1()
1
DROP TABLE t1;
DROP VIEW v1;
DROP FUNCTION func1;
DROP FUNCTION func2;
select column_type, group_concat(table_schema, '.', table_name), count(*) as num
from information_schema.columns where
table_schema='information_schema' and
(column_type = 'varchar(7)' or column_type = 'varchar(20)'
or column_type = 'varchar(27)')
group by column_type order by num;
column_type group_concat(table_schema, '.', table_name) num
varchar(27) information_schema.COLUMNS 1
varchar(7) information_schema.ROUTINES,information_schema.VIEWS 2
varchar(20) information_schema.FILES,information_schema.FILES,information_schema.PLUGINS,information_schema.PLUGINS,information_schema.PLUGINS,information_schema.PROFILING 6
create table t1(f1 char(1) not null, f2 char(9) not null)
default character set utf8;
select CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH from
information_schema.columns where table_schema='test' and table_name = 't1';
CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH
1 3
9 27
drop table t1;
use mysql;
INSERT INTO `proc` VALUES ('test','','PROCEDURE','','SQL','CONTAINS_SQL',
'NO','DEFINER','','','BEGIN\r\n \r\nEND','root@%','2006-03-02 18:40:03',
'2006-03-02 18:40:03','','','utf8','utf8_general_ci','utf8_general_ci','n/a');
select routine_name from information_schema.routines where ROUTINE_SCHEMA='test';
routine_name
delete from proc where name='';
use test;
grant select on test.* to mysqltest_1@localhost;
create table t1 (id int);
create view v1 as select * from t1;
create definer = mysqltest_1@localhost
sql security definer view v2 as select 1;
select * from information_schema.views
where table_name='v1' or table_name='v2';
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
NULL test v1 NONE YES root@localhost DEFINER latin1 latin1_swedish_ci
NULL test v2 select 1 AS `1` NONE NO mysqltest_1@localhost DEFINER latin1 latin1_swedish_ci
drop view v1, v2;
drop table t1;
drop user mysqltest_1@localhost;
set @a:= '.';
create table t1(f1 char(5));
create table t2(f1 char(5));
select concat(@a, table_name), @a, table_name
from information_schema.tables where table_schema = 'test';
concat(@a, table_name) @a table_name
.t1 . t1
.t2 . t2
drop table t1,t2;
DROP PROCEDURE IF EXISTS p1;
DROP FUNCTION IF EXISTS f1;
CREATE PROCEDURE p1() SET @a= 1;
CREATE FUNCTION f1() RETURNS INT RETURN @a + 1;
CREATE USER mysql_bug20230@localhost;
GRANT EXECUTE ON PROCEDURE p1 TO mysql_bug20230@localhost;
GRANT EXECUTE ON FUNCTION f1 TO mysql_bug20230@localhost;
SELECT ROUTINE_NAME, ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA='test';
ROUTINE_NAME ROUTINE_DEFINITION
f1 RETURN @a + 1
p1 SET @a= 1
SHOW CREATE PROCEDURE p1;
Procedure sql_mode Create Procedure character_set_client collation_connection Database Collation
p1 CREATE DEFINER=`root`@`localhost` PROCEDURE `p1`()
SET @a= 1 latin1 latin1_swedish_ci latin1_swedish_ci
SHOW CREATE FUNCTION f1;
Function sql_mode Create Function character_set_client collation_connection Database Collation
f1 CREATE DEFINER=`root`@`localhost` FUNCTION `f1`() RETURNS int(11)
RETURN @a + 1 latin1 latin1_swedish_ci latin1_swedish_ci
SELECT ROUTINE_NAME, ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA='test';
ROUTINE_NAME ROUTINE_DEFINITION
f1 NULL
p1 NULL
SHOW CREATE PROCEDURE p1;
Procedure sql_mode Create Procedure character_set_client collation_connection Database Collation
p1 NULL latin1 latin1_swedish_ci latin1_swedish_ci
SHOW CREATE FUNCTION f1;
Function sql_mode Create Function character_set_client collation_connection Database Collation
f1 NULL latin1 latin1_swedish_ci latin1_swedish_ci
CALL p1();
SELECT f1();
f1()
2
DROP FUNCTION f1;
DROP PROCEDURE p1;
DROP USER mysql_bug20230@localhost;
SELECT MAX(table_name) FROM information_schema.tables WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test');
MAX(table_name)
XTRADB_ENHANCEMENTS
SELECT table_name from information_schema.tables
WHERE table_name=(SELECT MAX(table_name)
FROM information_schema.tables WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test'));
table_name
XTRADB_ENHANCEMENTS
DROP TABLE IF EXISTS bug23037;
DROP FUNCTION IF EXISTS get_value;
SELECT COLUMN_NAME, MD5(COLUMN_DEFAULT), LENGTH(COLUMN_DEFAULT) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='bug23037';
COLUMN_NAME MD5(COLUMN_DEFAULT) LENGTH(COLUMN_DEFAULT)
fld1 7cf7a6782be951a1f2464a350da926a5 65532
SELECT MD5(get_value());
MD5(get_value())
7cf7a6782be951a1f2464a350da926a5
SELECT COLUMN_NAME, MD5(COLUMN_DEFAULT), LENGTH(COLUMN_DEFAULT), COLUMN_DEFAULT=get_value() FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='bug23037';
COLUMN_NAME MD5(COLUMN_DEFAULT) LENGTH(COLUMN_DEFAULT) COLUMN_DEFAULT=get_value()
fld1 7cf7a6782be951a1f2464a350da926a5 65532 1
DROP TABLE bug23037;
DROP FUNCTION get_value;
create view v1 as
select table_schema as object_schema,
table_name as object_name,
table_type as object_type
from information_schema.tables
order by object_schema;
explain select * from v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE tables ALL NULL NULL NULL NULL NULL Open_frm_only; Scanned all databases; Using filesort
explain select * from (select table_name from information_schema.tables) as a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE tables ALL NULL NULL NULL NULL NULL Skip_open_table; Scanned all databases
drop view v1;
create table t1 (f1 int(11));
create table t2 (f1 int(11), f2 int(11));
select table_name from information_schema.tables
where table_schema = 'test' and table_name not in
(select table_name from information_schema.columns
where table_schema = 'test' and column_name = 'f3');
table_name
t1
t2
drop table t1,t2;
create table t1(f1 int);
create view v1 as select f1+1 as a from t1;
create table t2 (f1 int, f2 int);
create view v2 as select f1+1 as a, f2 as b from t2;
select table_name, is_updatable from information_schema.views;
table_name is_updatable
v1 NO
v2 YES
delete from v1;
drop view v1,v2;
drop table t1,t2;
alter database;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
alter database test;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
create database mysqltest;
create table mysqltest.t1(a int, b int, c int);
create trigger mysqltest.t1_ai after insert on mysqltest.t1
for each row set @a = new.a + new.b + new.c;
grant select(b) on mysqltest.t1 to mysqltest_1@localhost;
select trigger_name from information_schema.triggers
where event_object_table='t1';
trigger_name
t1_ai
show triggers from mysqltest;
Trigger Event Table Statement Timing Created sql_mode Definer character_set_client collation_connection Database Collation
t1_ai INSERT t1 set @a = new.a + new.b + new.c AFTER NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci
show columns from t1;
Field Type Null Key Default Extra
b int(11) YES NULL
select column_name from information_schema.columns where table_name='t1';
column_name
b
show triggers;
Trigger Event Table Statement Timing Created sql_mode Definer character_set_client collation_connection Database Collation
select trigger_name from information_schema.triggers
where event_object_table='t1';
trigger_name
drop user mysqltest_1@localhost;
drop database mysqltest;
create table t1 (
f1 varchar(50),
f2 varchar(50) not null,
f3 varchar(50) default '',
f4 varchar(50) default NULL,
f5 bigint not null,
f6 bigint not null default 10,
f7 datetime not null,
f8 datetime default '2006-01-01'
);
select column_default from information_schema.columns where table_name= 't1';
column_default
NULL
NULL
NULL
NULL
10
NULL
2006-01-01 00:00:00
show columns from t1;
Field Type Null Key Default Extra
f1 varchar(50) YES NULL
f2 varchar(50) NO NULL
f3 varchar(50) YES
f4 varchar(50) YES NULL
f5 bigint(20) NO NULL
f6 bigint(20) NO 10
f7 datetime NO NULL
f8 datetime YES 2006-01-01 00:00:00
drop table t1;
show fields from information_schema.table_names;
ERROR 42S02: Unknown table 'table_names' in information_schema
show keys from information_schema.table_names;
ERROR 42S02: Unknown table 'table_names' in information_schema
USE information_schema;
SET max_heap_table_size = 16384;
CREATE TABLE test.t1( a INT );
SELECT *
FROM tables ta
JOIN collations co ON ( co.collation_name = ta.table_catalog )
JOIN character_sets cs ON ( cs.character_set_name = ta.table_catalog );
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 COLLATION_NAME CHARACTER_SET_NAME ID IS_DEFAULT IS_COMPILED SORTLEN CHARACTER_SET_NAME DEFAULT_COLLATE_NAME DESCRIPTION MAXLEN
DROP TABLE test.t1;
SET max_heap_table_size = DEFAULT;
USE test;
End of 5.0 tests.
select * from information_schema.engines WHERE ENGINE="MyISAM";
ENGINE SUPPORT COMMENT TRANSACTIONS XA SAVEPOINTS
MyISAM DEFAULT Default engine as of MySQL 3.23 with great performance NO NO NO
grant select on *.* to user3148@localhost;
select user,db from information_schema.processlist;
user db
user3148 test
drop user user3148@localhost;
SELECT 'other connection here' AS who;
who
other connection here
SELECT IF(`time` > 0, 'OK', `time`) AS time_low,
IF(`time` < 1000, 'OK', `time`) AS time_high,
IF(time_ms >= 1000, 'OK', time_ms) AS time_ms_low,
IF(time_ms < 1000000, 'OK', time_ms) AS time_ms_high
FROM INFORMATION_SCHEMA.PROCESSLIST
WHERE ID=@tid;
time_low time_high time_ms_low time_ms_high
OK OK OK OK
DROP TABLE IF EXISTS server_status;
DROP EVENT IF EXISTS event_status;
SET GLOBAL event_scheduler=1;
CREATE EVENT event_status
ON SCHEDULE AT NOW()
ON COMPLETION NOT PRESERVE
DO
BEGIN
CREATE TABLE server_status
SELECT variable_name
FROM information_schema.global_status
WHERE variable_name LIKE 'ABORTED_CONNECTS' OR
variable_name LIKE 'BINLOG_CACHE_DISK_USE';
END$$
SELECT variable_name FROM server_status;
variable_name
ABORTED_CONNECTS
BINLOG_CACHE_DISK_USE
DROP TABLE server_status;
SET GLOBAL event_scheduler=0;
explain select table_name from information_schema.views where
table_schema='test' and table_name='v1';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE views ALL NULL TABLE_SCHEMA,TABLE_NAME NULL NULL NULL Using where; Open_frm_only; Scanned 0 databases
explain select * from information_schema.tables;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE tables ALL NULL NULL NULL NULL NULL Open_full_table; Scanned all databases
explain select * from information_schema.collations;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE collations ALL NULL NULL NULL NULL NULL
explain select * from information_schema.tables where
table_schema='test' and table_name= 't1';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE tables ALL NULL TABLE_SCHEMA,TABLE_NAME NULL NULL NULL Using where; Open_full_table; Scanned 0 databases
explain select table_name, table_type from information_schema.tables
where table_schema='test';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE tables ALL NULL TABLE_SCHEMA NULL NULL NULL Using where; Open_frm_only; Scanned 1 database
explain select b.table_name
from information_schema.tables a, information_schema.columns b
where a.table_name='t1' and a.table_schema='test' and b.table_name=a.table_name;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE a ALL NULL TABLE_SCHEMA,TABLE_NAME NULL NULL NULL Using where; Skip_open_table; Scanned 0 databases
1 SIMPLE b ALL NULL NULL NULL NULL NULL Using where; Open_frm_only; Scanned all databases; Using join buffer (flat, BNL join)
SELECT * FROM INFORMATION_SCHEMA.SCHEMATA
WHERE SCHEMA_NAME = 'mysqltest';
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
SELECT * FROM INFORMATION_SCHEMA.SCHEMATA
WHERE SCHEMA_NAME = '';
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
SELECT * FROM INFORMATION_SCHEMA.SCHEMATA
WHERE SCHEMA_NAME = 'test';
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
NULL test latin1 latin1_swedish_ci NULL
select count(*) from INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA='mysql' AND TABLE_NAME='nonexisting';
count(*)
0
select count(*) from INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA='mysql' AND TABLE_NAME='';
count(*)
0
select count(*) from INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA='' AND TABLE_NAME='';
count(*)
0
select count(*) from INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA='' AND TABLE_NAME='nonexisting';
count(*)
0
CREATE VIEW v1
AS SELECT *
FROM information_schema.tables;
SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS where TABLE_NAME = 'v1';
VIEW_DEFINITION
select `tables`.`TABLE_CATALOG` AS `TABLE_CATALOG`,`tables`.`TABLE_SCHEMA` AS `TABLE_SCHEMA`,`tables`.`TABLE_NAME` AS `TABLE_NAME`,`tables`.`TABLE_TYPE` AS `TABLE_TYPE`,`tables`.`ENGINE` AS `ENGINE`,`tables`.`VERSION` AS `VERSION`,`tables`.`ROW_FORMAT` AS `ROW_FORMAT`,`tables`.`TABLE_ROWS` AS `TABLE_ROWS`,`tables`.`AVG_ROW_LENGTH` AS `AVG_ROW_LENGTH`,`tables`.`DATA_LENGTH` AS `DATA_LENGTH`,`tables`.`MAX_DATA_LENGTH` AS `MAX_DATA_LENGTH`,`tables`.`INDEX_LENGTH` AS `INDEX_LENGTH`,`tables`.`DATA_FREE` AS `DATA_FREE`,`tables`.`AUTO_INCREMENT` AS `AUTO_INCREMENT`,`tables`.`CREATE_TIME` AS `CREATE_TIME`,`tables`.`UPDATE_TIME` AS `UPDATE_TIME`,`tables`.`CHECK_TIME` AS `CHECK_TIME`,`tables`.`TABLE_COLLATION` AS `TABLE_COLLATION`,`tables`.`CHECKSUM` AS `CHECKSUM`,`tables`.`CREATE_OPTIONS` AS `CREATE_OPTIONS`,`tables`.`TABLE_COMMENT` AS `TABLE_COMMENT` from `information_schema`.`tables`
DROP VIEW v1;
SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA
WHERE SCHEMA_NAME ='information_schema';
SCHEMA_NAME
information_schema
SELECT TABLE_COLLATION FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA='mysql' and TABLE_NAME= 'db';
TABLE_COLLATION
utf8_bin
select * from information_schema.columns where table_schema = NULL;
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 CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
select * from `information_schema`.`COLUMNS` where `TABLE_NAME` = NULL;
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 CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_SCHEMA` = NULL;
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
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_NAME` = NULL;
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
select * from `information_schema`.`PARTITIONS` where `TABLE_SCHEMA` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PARTITION_NAME SUBPARTITION_NAME PARTITION_ORDINAL_POSITION SUBPARTITION_ORDINAL_POSITION PARTITION_METHOD SUBPARTITION_METHOD PARTITION_EXPRESSION SUBPARTITION_EXPRESSION PARTITION_DESCRIPTION TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE CREATE_TIME UPDATE_TIME CHECK_TIME CHECKSUM PARTITION_COMMENT NODEGROUP TABLESPACE_NAME
select * from `information_schema`.`PARTITIONS` where `TABLE_NAME` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PARTITION_NAME SUBPARTITION_NAME PARTITION_ORDINAL_POSITION SUBPARTITION_ORDINAL_POSITION PARTITION_METHOD SUBPARTITION_METHOD PARTITION_EXPRESSION SUBPARTITION_EXPRESSION PARTITION_DESCRIPTION TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE CREATE_TIME UPDATE_TIME CHECK_TIME CHECKSUM PARTITION_COMMENT NODEGROUP TABLESPACE_NAME
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `CONSTRAINT_SCHEMA` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG UNIQUE_CONSTRAINT_SCHEMA UNIQUE_CONSTRAINT_NAME MATCH_OPTION UPDATE_RULE DELETE_RULE TABLE_NAME REFERENCED_TABLE_NAME
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `TABLE_NAME` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG UNIQUE_CONSTRAINT_SCHEMA UNIQUE_CONSTRAINT_NAME MATCH_OPTION UPDATE_RULE DELETE_RULE TABLE_NAME REFERENCED_TABLE_NAME
select * from information_schema.schemata where schema_name = NULL;
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
select * from `information_schema`.`STATISTICS` where `TABLE_SCHEMA` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLUMN_NAME COLLATION CARDINALITY SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT
select * from `information_schema`.`STATISTICS` where `TABLE_NAME` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLUMN_NAME COLLATION CARDINALITY SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT
select * from information_schema.tables where table_schema = NULL;
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
select * from information_schema.tables where table_catalog = NULL;
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
select * from information_schema.tables where table_name = NULL;
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
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_SCHEMA` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_NAME` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
select * from `information_schema`.`TRIGGERS` where `EVENT_OBJECT_SCHEMA` = NULL;
TRIGGER_CATALOG TRIGGER_SCHEMA TRIGGER_NAME EVENT_MANIPULATION EVENT_OBJECT_CATALOG EVENT_OBJECT_SCHEMA EVENT_OBJECT_TABLE ACTION_ORDER ACTION_CONDITION ACTION_STATEMENT ACTION_ORIENTATION ACTION_TIMING ACTION_REFERENCE_OLD_TABLE ACTION_REFERENCE_NEW_TABLE ACTION_REFERENCE_OLD_ROW ACTION_REFERENCE_NEW_ROW CREATED SQL_MODE DEFINER CHARACTER_SET_CLIENT COLLATION_CONNECTION DATABASE_COLLATION
select * from `information_schema`.`TRIGGERS` where `EVENT_OBJECT_TABLE` = NULL;
TRIGGER_CATALOG TRIGGER_SCHEMA TRIGGER_NAME EVENT_MANIPULATION EVENT_OBJECT_CATALOG EVENT_OBJECT_SCHEMA EVENT_OBJECT_TABLE ACTION_ORDER ACTION_CONDITION ACTION_STATEMENT ACTION_ORIENTATION ACTION_TIMING ACTION_REFERENCE_OLD_TABLE ACTION_REFERENCE_NEW_TABLE ACTION_REFERENCE_OLD_ROW ACTION_REFERENCE_NEW_ROW CREATED SQL_MODE DEFINER CHARACTER_SET_CLIENT COLLATION_CONNECTION DATABASE_COLLATION
select * from `information_schema`.`VIEWS` where `TABLE_SCHEMA` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
select * from `information_schema`.`VIEWS` where `TABLE_NAME` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
explain extended select 1 from information_schema.tables;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE tables ALL NULL NULL NULL NULL NULL NULL Skip_open_table; Scanned all databases
Warnings:
Note 1003 select 1 AS `1` from `information_schema`.`tables`
use information_schema;
show events;
Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
show events from information_schema;
Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
show events where Db= 'information_schema';
Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
use test;
#
# Bug#34166 Server crash in SHOW OPEN TABLES and prelocking
#
drop table if exists t1;
drop function if exists f1;
create table t1 (a int);
create function f1() returns int
begin
insert into t1 (a) values (1);
return 0;
end|
show open tables where f1()=0;
show open tables where f1()=0;
drop table t1;
drop function f1;
select * from information_schema.tables where 1=sleep(100000);
select * from information_schema.columns where 1=sleep(100000);
explain select count(*) from information_schema.tables;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE tables ALL NULL NULL NULL NULL NULL Skip_open_table; Scanned all databases
explain select count(*) from information_schema.columns;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE columns ALL NULL NULL NULL NULL NULL Open_frm_only; Scanned all databases
explain select count(*) from information_schema.views;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE views ALL NULL NULL NULL NULL NULL Open_frm_only; Scanned all databases
set global init_connect="drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;\
drop table if exists t1;drop table if exists t1;";
select * from information_schema.global_variables where variable_name='init_connect';
VARIABLE_NAME VARIABLE_VALUE
INIT_CONNECT drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists t1;
drop table if exists t1;drop table if exists
Warnings:
Warning 1265 Data truncated for column 'VARIABLE_VALUE' at row 1
set global init_connect="";
create table t0 select * from information_schema.global_status where VARIABLE_NAME='COM_SELECT';
SELECT 1;
1
1
select a.VARIABLE_VALUE - b.VARIABLE_VALUE from t0 b, information_schema.global_status a
where a.VARIABLE_NAME = b.VARIABLE_NAME;
a.VARIABLE_VALUE - b.VARIABLE_VALUE
2
drop table t0;
CREATE TABLE t1(a INT) KEY_BLOCK_SIZE=1;
SELECT CREATE_OPTIONS FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME='t1';
CREATE_OPTIONS
key_block_size=1
DROP TABLE t1;
SET TIMESTAMP=@@TIMESTAMP + 10000000;
SELECT 'NOT_OK' AS TEST_RESULT FROM INFORMATION_SCHEMA.PROCESSLIST WHERE time < 0;
TEST_RESULT
SET TIMESTAMP=DEFAULT;
#
# Bug #50276: Security flaw in INFORMATION_SCHEMA.TABLES
#
CREATE DATABASE db1;
USE db1;
CREATE TABLE t1 (id INT);
CREATE USER nonpriv;
USE test;
# connected as nonpriv
# Should return 0
SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME='t1';
COUNT(*)
0
USE INFORMATION_SCHEMA;
# Should return 0
SELECT COUNT(*) FROM TABLES WHERE TABLE_NAME='t1';
COUNT(*)
0
# connected as root
DROP USER nonpriv;
DROP TABLE db1.t1;
DROP DATABASE db1;
Bug#54422 query with = 'variables'
CREATE TABLE variables(f1 INT);
SELECT COLUMN_DEFAULT, TABLE_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE INFORMATION_SCHEMA.COLUMNS.TABLE_NAME = 'variables';
COLUMN_DEFAULT TABLE_NAME
NULL variables
DROP TABLE variables;
#
# Bug #53814: NUMERIC_PRECISION for unsigned bigint field is 19,
# should be 20
#
CREATE TABLE ubig (a BIGINT, b BIGINT UNSIGNED);
SELECT TABLE_NAME, COLUMN_NAME, NUMERIC_PRECISION
FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ubig';
TABLE_NAME COLUMN_NAME NUMERIC_PRECISION
ubig a 19
ubig b 20
INSERT INTO ubig VALUES (0xFFFFFFFFFFFFFFFF,0xFFFFFFFFFFFFFFFF);
Warnings:
Warning 1264 Out of range value for column 'a' at row 1
SELECT length(CAST(b AS CHAR)) FROM ubig;
length(CAST(b AS CHAR))
20
DROP TABLE ubig;
End of 5.1 tests.
Reference in a new issue View git blame Copy permalink