information_schema.test

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

table_schema="information_schema" and table_name="COLUMNS";
select table_type from information_schema.tables
where table_schema="mysql" and table_name="user";

# test for 'show open tables ... where'
show open tables where `table` like "user";
# test for 'show status ... where'
show status where variable_name like "%database%";
# test for 'show variables ... where'
show variables where variable_name like "skip_show_databas";

#
# Bug #7981:SHOW GLOBAL STATUS crashes server
#
# We don't actually care about the value, just that it doesn't crash.
--replace_column 2 #
show global status like "Threads_running";

#
# Bug #7915  crash,JOIN VIEW, subquery, 
# SELECT .. FROM INFORMATION_SCHEMA.COLUMNS
#
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;

#
# Bug #7476: crash on SELECT * FROM INFORMATION_SCHEMA.TABLES
#

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;
let $tab_count= 65;
--disable_query_log
while ($tab_count)
{
     EVAL CREATE TABLE t_$tab_count (f1 BIGINT);
     dec $tab_count ;
}
--disable_result_log
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES;
--enable_result_log
SELECT count(*) FROM INFORMATION_SCHEMA.TABLES;
let $tab_count= 65;
while ($tab_count)
{
     EVAL DROP TABLE t_$tab_count;
     dec $tab_count ;
}
--enable_query_log
drop view a2, a1;
drop table t_crashme;

#
# Bug #7215  information_schema: columns are longtext instead of varchar
# Bug #7217  information_schema: columns are varbinary() instead of timestamp
#
select table_schema,table_name, column_name from
information_schema.columns 
where data_type = 'longtext';
select table_name, column_name, data_type from information_schema.columns
where data_type = 'datetime';

#
# Bug #8164  subquery with INFORMATION_SCHEMA.COLUMNS, 100 % CPU
#
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);

#
# Bug #9344  INFORMATION_SCHEMA, wrong content, numeric columns
#

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';
drop table t1;

#
# Bug#10261  INFORMATION_SCHEMA.COLUMNS, incomplete result for non root user
#

grant select on test.* to mysqltest_4@localhost;
connect (user10261,localhost,mysqltest_4,,);
connection user10261;
SELECT TABLE_NAME, COLUMN_NAME, PRIVILEGES FROM INFORMATION_SCHEMA.COLUMNS 
where COLUMN_NAME='TABLE_NAME';
connection default;
delete from mysql.user where user='mysqltest_4';
delete from mysql.db where user='mysqltest_4';
flush privileges;

#
# Bug #9404  information_schema: Weird error messages
# with SELECT SUM() ... GROUP BY queries
#
SELECT table_schema, count(*) FROM information_schema.TABLES GROUP BY TABLE_SCHEMA;


#
# TRIGGERS table test
#
create table t1 (i int, j int);

delimiter |;
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|
delimiter ;|
show triggers;
select * from information_schema.triggers;

drop trigger trg1;
drop trigger trg2;
drop trigger trg3;
drop table t1;


#
# Bug #10964  Information Schema:Authorization check on privilege tables is improper
#

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;

connect (con1,localhost,user1,,mysqltest);
connect (con2,localhost,user2,,mysqltest);
connect (con3,localhost,user3,,mysqltest);
connect (con4,localhost,user4,,);
connection con1;
select * from information_schema.column_privileges;
select * from information_schema.table_privileges;
select * from information_schema.schema_privileges;
select * from information_schema.user_privileges;
show grants;
connection con2;
select * from information_schema.column_privileges;
select * from information_schema.table_privileges;
select * from information_schema.schema_privileges;
select * from information_schema.user_privileges;
show grants;
connection con3;
select * from information_schema.column_privileges;
select * from information_schema.table_privileges;
select * from information_schema.schema_privileges;
select * from information_schema.user_privileges;
show grants;
connection con4;
select * from information_schema.column_privileges where grantee like '%user%';
select * from information_schema.table_privileges where grantee like '%user%';
select * from information_schema.schema_privileges where grantee like '%user%';
select * from information_schema.user_privileges where grantee like '%user%';
show grants;
connection default;
drop user user1@localhost, user2@localhost, user3@localhost, user4@localhost;
use test;
drop database mysqltest;

#
# Bug #11055 information_schema: routines.sql_data_access has wrong value
#
--disable_warnings
drop procedure if exists p1;
drop procedure if exists p2;
--enable_warnings

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%';
drop procedure p1;
drop procedure p2;

#
# Bug #9434 SHOW CREATE DATABASE information_schema;
#
show create database information_schema;

#
# Bug #11057 information_schema: columns table has some questionable contents
# Bug #12301 information_schema: NUMERIC_SCALE must be 0 for integer columns
#
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';
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';
drop table t1;

#
# Bug #12127 triggers do not show in info_schema before they are used if set to the database
#
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';
use test;
drop table t1;

#
# Bug#12518 COLUMN_DEFAULT has wrong value if NOT NULL is set
#
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';
use test;
show columns from t1;
drop table t1;

#
# Bug #12636: SHOW TABLE STATUS with where condition containing a subquery
#             over information schema
#

CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int);

--replace_column 8 # 12 # 13 #
SHOW TABLE STATUS FROM test
  WHERE name IN ( SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
                    WHERE TABLE_SCHEMA='test' AND TABLE_TYPE='BASE TABLE');

DROP TABLE t1,t2;

#
# Bug #12905 show fields from view behaving erratically with current database
#
create table t1(f1 int);
create view v1 (c) as select f1 from t1;
connect (con5,localhost,root,,*NO-ONE*);
select database();
show fields from test.v1;
connection default;
drop view v1;
drop table t1;

#
# Bug #9846 Inappropriate error displayed while dropping table from 'INFORMATION_SCHEMA'
#
--error 1044
alter database information_schema;
--error 1044
drop database information_schema;
--error 1044
drop table information_schema.tables;
--error 1044
alter table information_schema.tables;
#
# Bug #9683 INFORMATION_SCH: Creation of temporary table allowed in Information_schema DB
#
use information_schema;
--error 1044
create temporary table schemata(f1 char(10));
#
# Bug #10708 SP's can use INFORMATION_SCHEMA as ROUTINE_SCHEMA
#
delimiter |;
--error 1044
CREATE PROCEDURE p1 ()
BEGIN
  SELECT 'foo' FROM DUAL;
END |
delimiter ;|
select  ROUTINE_NAME from routines;
#
# Bug #10734 Grant of privileges other than 'select' and 'create view' should fail on schema
#
--error 1044
grant all on information_schema.* to 'user1'@'localhost';
--error 1044
grant select on information_schema.* to 'user1'@'localhost';

#
# Bug#14089 FROM list subquery always fails when information_schema is current database
#
use test;
create table t1(id int);
insert into t1(id) values (1);
select 1 from (select 1 from test.t1) a;
use information_schema;
select 1 from (select 1 from test.t1) a;
use test;
drop table t1;

#
# Bug #14290: character_maximum_length for text fields
#

create table t1(a blob, b text charset utf8, c text charset ucs2);
select data_type, character_octet_length, character_maximum_length 
  from information_schema.columns where table_name='t1';
drop table t1;

#
# Bug#14476 `information_schema`.`TABLES`.`TABLE_TYPE` with empty value
#
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";
drop view v1;

#
# Bug #14387 SHOW COLUMNS doesn't work on temporary tables
# Bug #15224 SHOW INDEX from temporary table doesn't work
# Bug #12770 DESC cannot display the info. about temporary table
#
create temporary table t1(f1 int, index(f1));
show columns from t1;
describe t1;
show indexes from t1;
drop table t1;

#
# Bug#14271 I_S: columns has no size for (var)binary columns
#
create table t1(f1 binary(32), f2 varbinary(64));
select character_maximum_length, character_octet_length
from information_schema.columns where table_name='t1';
drop table t1;

#
# Bug#15533 crash, information_schema, function, view
#
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;

delimiter //;
CREATE FUNCTION func1() RETURNS BIGINT
BEGIN
  RETURN ( SELECT COUNT(*) FROM INFORMATION_SCHEMA.VIEWS);
END//
delimiter ;//

CREATE VIEW v1 AS SELECT 1 FROM t1
                    WHERE f3 = (SELECT func2 ());
SELECT func1();
DROP TABLE t1;
DROP VIEW v1;
DROP FUNCTION func1;
DROP FUNCTION func2;

#
# Bug #15851 Unlistable directories yield no info from information_schema
#
create database mysqltest;
create table mysqltest.t1(a int);
--exec chmod -r $MYSQLTEST_VARDIR/master-data/mysqltest
select table_schema from information_schema.tables where table_schema='mysqltest';
--exec chmod +r $MYSQLTEST_VARDIR/master-data/mysqltest
drop database mysqltest;

#
# Bug#15307 GROUP_CONCAT() with ORDER BY returns empty set on information_schema
#
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)')
group by column_type order by num;