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mariadb/mysql-test/r/information_schema.result
unknown 3f24932124 WL#2130: Table locking for stored FUNCTIONs 
Collect all tables and SPs refered by a statement, and open all tables
with an implicit LOCK TABLES. Do find things refered by triggers and views,
we open them first (and then repeat this until nothing new is found), before
doing the actual lock tables.


mysql-test/r/information_schema.result:
  Updated result for WL#2130.
mysql-test/r/lock.result:
  Updated result for WL#2130.
mysql-test/r/sp-error.result:
  Updated result for WL#2130.
mysql-test/r/sp.result:
  Updated result for WL#2130.
mysql-test/r/view.result:
  Updated result for WL#2130.
mysql-test/t/information_schema.test:
  Disabled one test case due to a bug involving LOCK TABLES,
  which shows up with WL#2130.
mysql-test/t/lock.test:
  New error message with WL#2130. This change is under debate and might change
  in the future, but will do for now.
mysql-test/t/sp-error.test:
  Updated for WL#2130. Some tests are voided when table access does work from
  functions.
mysql-test/t/sp.test:
  Updated for WL#2130.
mysql-test/t/view.test:
  Updated for WL#2130.
sql/item_func.cc:
  We now have to set net.no_send_ok for functions too, with WL#2130.
sql/share/errmsg.txt:
  Reused an error code since the old use was voided by WL#2130, but a new
  one was needed instead (similar, but more specific restriction).
sql/sp.cc:
  Fixed error handling and collection of used tables for WL#2130.
sql/sp.h:
  Fixed error handling and collection of used tables for WL#2130.
sql/sp_head.cc:
  Added support functions for collecting and merging hash tables and lists
  of used tables from SPs and substatements, for WL#2130.
sql/sp_head.h:
  Added support functions for collecting and merging hash tables and lists
  of used tables from SPs and substatements, for WL#2130.
sql/sql_base.cc:
  Changed the way table->query_id is tested and set during with locked tables
  in effect. This makes some SP test cases work with WL#2130, but has a side
  effect on some error cases with explicit LOCK TABLES. It's still debated if
  this is the correct way, so it might change.
sql/sql_class.h:
  Added flags for circumventing some interference between WL#2130 and mysql_make_view().
sql/sql_derived.cc:
  Added some missing initializations. (Potential bugs.)
sql/sql_lex.cc:
  Clear the new hash tables for WL#2130.
sql/sql_lex.h:
  Added hash tables for procedures and tables too (as for functions), for WL#2130.
sql/sql_parse.cc:
  WL#2130: Make table accesses from stored functions work by adding an implicit
  LOCK TABLES around (most) executed statements. To do this, we have to go through
  a loop where we collect all SPs and tables in mysql_execute_statement.
sql/sql_prepare.cc:
  Cache both functions and procedures for WL#2130.
sql/sql_show.cc:
  Added some missing initializations. (Potential bugs.)
sql/sql_view.cc:
  Shortcut mysql_make_view() if thd->shortcut_make_view is true during
  the pre-open phase for collecting tables in WL#2130. Otherwise, the
  similar mechanism here causes interference.
sql/sql_yacc.yy:
  For WL#2130, added caching of procedures and disallowed LOCK/UNLOCK TABLES in SPs.
2005-02-08 20:52:50 +01:00

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show variables where variable_name like "skip_show_database";
Variable_name Value
skip_show_database OFF
grant all privileges on test.* to mysqltest_1@localhost;
select * from information_schema.SCHEMATA where schema_name > 'm';
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME SQL_PATH
NULL mysql latin1 NULL
NULL test latin1 NULL
select schema_name from information_schema.schemata;
schema_name
information_schema
mysql
test
show databases like 't%';
Database (t%)
test
show databases;
Database
information_schema
mysql
test
show databases where `database` = 't%';
Database
create database testtets;
create table testtets.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 testtets.t4(a int);
create view v1 (c) as select table_name from information_schema.TABLES;
select * from v1;
c
SCHEMATA
TABLES
COLUMNS
CHARACTER_SETS
COLLATIONS
COLLATION_CHARACTER_SET_APPLICABILITY
ROUTINES
STATISTICS
VIEWS
USER_PRIVILEGES
SCHEMA_PRIVILEGES
TABLE_PRIVILEGES
COLUMN_PRIVILEGES
TABLE_CONSTRAINTS
KEY_COLUMN_USAGE
columns_priv
db
func
help_category
help_keyword
help_relation
help_topic
host
proc
procs_priv
tables_priv
time_zone
time_zone_leap_second
time_zone_name
time_zone_transition
time_zone_transition_type
user
t2
t3
v1
t1
t4
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_PRIVILEGES TABLE_PRIVILEGES
TABLE_CONSTRAINTS TABLE_CONSTRAINTS
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
t2 t2
t3 t3
t1 t1
t4 t4
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_PRIVILEGES TABLE_PRIVILEGES
TABLE_CONSTRAINTS TABLE_CONSTRAINTS
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
t2 t2
t3 t3
t1 t1
t4 t4
select table_name from information_schema.TABLES
where table_schema = "testtets" and table_name like "t%";
table_name
t1
t4
select * from information_schema.STATISTICS where TABLE_SCHEMA = "testtets";
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 testtets t1 1 testtets 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
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 9 Fixed 0 0 0 21474836479 1024 0 NULL # # NULL latin1_swedish_ci NULL
t3 MyISAM 9 Fixed 0 0 0 21474836479 1024 0 NULL # # NULL latin1_swedish_ci NULL
v1 NULL 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_bin 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 testtets t1 a 1 NULL YES int 11 11 11 0 NULL NULL int(11) select,insert,update,references
show columns from testtets.t1 where field like "%a%";
Field Type Null Key Default Extra
a int(11) YES NULL
drop view v1;
drop tables testtets.t4, testtets.t1, t2, t3;
drop database testtets;
select * from information_schema.CHARACTER_SETS
where CHARACTER_SET_NAME like 'latin1%';
CHARACTER_SET_NAME DEFAULT_COLLATE_NAME DESCRIPTION MAXLEN
latin1 latin1_swedish_ci ISO 8859-1 West European 1
SHOW CHARACTER SET LIKE 'latin1%';
Charset Description Default collation Maxlen
latin1 ISO 8859-1 West European latin1_swedish_ci 1
SHOW CHARACTER SET WHERE charset like 'latin1%';
Charset Description Default collation Maxlen
latin1 ISO 8859-1 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 0
latin1_swedish_ci latin1 8 Yes Yes 1
latin1_danish_ci latin1 15 0
latin1_german2_ci latin1 31 Yes 2
latin1_bin latin1 47 Yes 1
latin1_general_ci latin1 48 0
latin1_general_cs latin1 49 0
latin1_spanish_ci latin1 94 0
SHOW COLLATION LIKE 'latin1%';
Collation Charset Id Default Compiled Sortlen
latin1_german1_ci latin1 5 0
latin1_swedish_ci latin1 8 Yes Yes 1
latin1_danish_ci latin1 15 0
latin1_german2_ci latin1 31 Yes 2
latin1_bin latin1 47 Yes 1
latin1_general_ci latin1 48 0
latin1_general_cs latin1 49 0
latin1_spanish_ci latin1 94 0
SHOW COLLATION WHERE collation like 'latin1%';
Collation Charset Id Default Compiled Sortlen
latin1_german1_ci latin1 5 0
latin1_swedish_ci latin1 8 Yes Yes 1
latin1_danish_ci latin1 15 0
latin1_german2_ci latin1 31 Yes 2
latin1_bin latin1 47 Yes 1
latin1_general_ci latin1 48 0
latin1_general_cs latin1 49 0
latin1_spanish_ci latin1 94 0
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
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;
parameter_style sql_data_access dtd_identifier
SQL CONTAINS SQL NULL
SQL CONTAINS SQL int
show procedure status;
Db Name Type Definer Modified Created Security_type Comment
test sel2 PROCEDURE root@localhost # # DEFINER
show function status;
Db Name Type Definer Modified Created Security_type Comment
test sub1 FUNCTION root@localhost # # DEFINER
select a.ROUTINE_NAME from information_schema.ROUTINES a,
information_schema.SCHEMATA b where
a.ROUTINE_SCHEMA = b.SCHEMA_NAME;
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 2
1 SIMPLE # ALL NULL NULL NULL NULL 2 Using where
select a.ROUTINE_NAME, b.name from information_schema.ROUTINES a,
mysql.proc b where a.ROUTINE_NAME = convert(b.name using utf8);
ROUTINE_NAME name
sub1 sub1
sel2 sel2
select count(*) from information_schema.ROUTINES;
count(*)
2
create view v0 (c) as select schema_name from information_schema.schemata;
select * from v0;
c
information_schema
mysql
test
explain select * from v0;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY # ALL NULL NULL NULL NULL 2
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
NULL test v0 select sql_no_cache `schemata`.`SCHEMA_NAME` AS `c` from `information_schema`.`schemata` NONE NO
NULL test v1 select sql_no_cache `tables`.`TABLE_NAME` AS `c` from `information_schema`.`tables` where (`tables`.`TABLE_NAME` = _utf8'v1') NONE NO
NULL test v2 select sql_no_cache `columns`.`COLUMN_NAME` AS `c` from `information_schema`.`columns` where (`columns`.`TABLE_NAME` = _utf8'v2') NONE NO
NULL test v3 select sql_no_cache `character_sets`.`CHARACTER_SET_NAME` AS `c` from `information_schema`.`character_sets` where (`character_sets`.`CHARACTER_SET_NAME` like _utf8'latin1%') NONE NO
NULL test v4 select sql_no_cache `collations`.`COLLATION_NAME` AS `c` from `information_schema`.`collations` where (`collations`.`COLLATION_NAME` like _utf8'latin1%') NONE NO
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
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='mysqltest_1';
delete from mysql.db where user='mysqltest_1';
delete from mysql.tables_priv where user='mysqltest_1';
delete from mysql.columns_priv where user='mysqltest_1';
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
NULL test PRIMARY NULL test t1 a 1 NULL
NULL test constraint_1 NULL test t1 a 1 NULL
NULL test key_1 NULL test t1 a 1 NULL
NULL test key_2 NULL test t1 a 1 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
NULL test v1 select `test`.`t1`.`a` AS `c` from `test`.`t1` CASCADED YES
NULL test v2 select `test`.`t1`.`a` AS `c` from `test`.`t1` LOCAL YES
NULL test v3 select `test`.`t1`.`a` AS `c` from `test`.`t1` CASCADED YES
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
0
9
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(64) NOT NULL default '',
`DEFAULT_COLLATE_NAME` varchar(64) NOT NULL default '',
`DESCRIPTION` varchar(60) NOT NULL default '',
`MAXLEN` bigint(3) NOT NULL default '0'
) ENGINE=MEMORY DEFAULT CHARSET=utf8 MAX_ROWS=1818
set names latin2;
SHOW CREATE TABLE INFORMATION_SCHEMA.character_sets;
Table Create Table
character_sets CREATE TEMPORARY TABLE `character_sets` (
`CHARACTER_SET_NAME` varchar(64) NOT NULL default '',
`DEFAULT_COLLATE_NAME` varchar(64) NOT NULL default '',
`DESCRIPTION` varchar(60) NOT NULL default '',
`MAXLEN` bigint(3) NOT NULL default '0'
) ENGINE=MEMORY DEFAULT CHARSET=utf8 MAX_ROWS=1818
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 ISO 8859-1 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(64) NOT NULL default '',
`DEFAULT_COLLATE_NAME` varchar(64) 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) 7 7 5 3
b decimal(5,1) 7 7 5 1
c float(5,2) 5 5 5 2
d decimal(6,4) 8 8 6 4
e float 12 12 12 NULL
f decimal(6,3) 8 8 6 3
g int(11) 11 11 11 0
h double(10,3) 10 10 10 3
i double 22 22 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 char(64)
proc body blob
proc definer char(77)
proc created timestamp
proc modified timestamp
proc sql_mode set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES','IGNORE_SPACE','NOT_USED','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')
proc comment char(64)
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
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
SCHEMATA TEMPORARY MyISAM
TABLES TEMPORARY MyISAM
show tables from information_schema like "T%";
Tables_in_information_schema (T%)
TABLES
TABLE_PRIVILEGES
TABLE_CONSTRAINTS
create database information_schema;
ERROR HY000: Can't create database 'information_schema'; database exists
use information_schema;
show full tables like "T%";
Tables_in_information_schema (T%) Table_type
TABLES TEMPORARY
TABLE_PRIVILEGES TEMPORARY
TABLE_CONSTRAINTS TEMPORARY
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_PRIVILEGES
TABLE_CONSTRAINTS
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 t2 (c) as select f1 from t1;
create view t3 (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
Warnings:
Warning 1356 View 'test.t2' references invalid table(s) or column(s) or function(s)
Warning 1356 View 'test.t3' references invalid table(s) or column(s) or function(s)
select table_name from information_schema.views
where table_schema='test';
table_name
Warnings:
Warning 1356 View 'test.t2' references invalid table(s) or column(s) or function(s)
Warning 1356 View 'test.t3' references invalid table(s) or column(s) or function(s)
select column_name from information_schema.columns
where table_schema='test';
column_name
f1
Warnings:
Warning 1356 View 'test.t2' references invalid table(s) or column(s) or function(s)
Warning 1356 View 'test.t3' references invalid table(s) or column(s) or function(s)
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
drop view t2;
drop view t3;
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(64)
varchar(64)
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 0
show variables where variable_name like "skip_show_databas";
Variable_name Value
show global status like "Threads_running";
Variable_name Value
Threads_running 1
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