1
0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00

Merge hundin.mysql.fi:/my/mysql-4.0 into hundin.mysql.fi:/my/mysql-4.1

mysql-test/r/null_key.result:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
This commit is contained in:
unknown
2002-10-16 19:31:22 +03:00
400 changed files with 76801 additions and 6488 deletions

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@ -1,6 +1,10 @@
This directory contains a test suite for mysql daemon. To run
the currently existing test cases, simply execute ./mysql-test-run in
this directory. It will fire up the newly built mysqld and test it.
If you want to run the test with a running MySQL server use the --external
option to mysql-test-run.
Note that you do not have to have to do make install, and you could
actually have a co-existing MySQL installation - the tests will not
conflict with it.
@ -13,8 +17,7 @@ http://www.mysql.com/doc/M/y/MySQL_test_suite.html
You can create your own test cases. To create a test case:
cd t
vi test_case_name.test
xeamacs t/test_case_name.test
in the file, put a set of SQL commands that will create some tables,
load test data, run some queries to manipulate it.

View File

@ -27,14 +27,13 @@ test_name=$1
[ -z $test_name ] && usage
result_file=$RESULT_DIR/$test_name.result
reject_file=$RESULT_DIR/$test_name.reject
[ -f $result_file ] && die "result file $result_file has already been created"
touch $result_file
echo "Running the test case against empty file, will fail, but don't worry"
./mysql-test-run --do-test=$test_name
reject_file=$result_file.reject
./mysql-test-run --local $test_name
if [ -f $reject_file ] ; then
echo "Below are the contents of the reject file:"

View File

@ -176,7 +176,7 @@ USER_TEST=
EXTRA_MASTER_OPT=""
EXTRA_MYSQL_TEST_OPT=""
USE_RUNNING_SERVER=1
USE_RUNNING_SERVER=""
DO_GCOV=""
DO_GDB=""
MANUAL_GDB=""
@ -204,6 +204,7 @@ while test $# -gt 0; do
--slave-binary=*)
SLAVE_MYSQLD=`$ECHO "$1" | $SED -e "s;--slave-binary=;;"` ;;
--local) USE_RUNNING_SERVER="" ;;
--extern) USE_RUNNING_SERVER="1" ;;
--tmpdir=*) MYSQL_TMP_DIR=`$ECHO "$1" | $SED -e "s;--tmpdir=;;"` ;;
--local-master)
MASTER_MYPORT=3306;

View File

@ -50,10 +50,10 @@ PRIMARY KEY (GROUP_ID,LANG_ID),
KEY NAME (NAME));
ALTER TABLE t1 CHANGE NAME NAME CHAR(80) not null;
SHOW FULL COLUMNS FROM t1;
Field Type Null Key Default Extra Privileges
GROUP_ID int(10) unsigned PRI 0 select,insert,update,references
LANG_ID smallint(5) unsigned PRI 0 select,insert,update,references
NAME char(80) MUL select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
GROUP_ID int(10) unsigned PRI 0 select,insert,update,references
LANG_ID smallint(5) unsigned PRI 0 select,insert,update,references
NAME char(80) character set latin1 MUL select,insert,update,references
DROP TABLE t1;
create table t1 (n int);
insert into t1 values(9),(3),(12),(10);
@ -120,5 +120,5 @@ alter table t2 rename t1, add c char(10) comment "no comment";
show columns from t1;
Field Type Null Key Default Extra
i int(10) unsigned PRI NULL auto_increment
c char(10) YES NULL
c char(10) character set latin1 YES NULL
drop table t1;

View File

@ -139,14 +139,14 @@ id parent_id level
1015 102 2
1010 102 2
explain select level from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 where used; Using index
explain select level,id from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 where used; Using index
explain select level,id,parent_id from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 where used
select level,id from t1 where level=1;
level id
1 1002
@ -624,8 +624,8 @@ id parent_id level
1025 102 2
1016 102 2
explain select level from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 where used; Using index
select level,id from t1 where level=1;
level id
1 1004

View File

@ -2,8 +2,8 @@ drop table if exists t1;
CREATE TABLE t1 (id CHAR(12) not null, PRIMARY KEY (id));
insert into t1 values ('000000000001'),('000000000002');
explain select * from t1 where id=000000000001;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 12 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 12 NULL 2 where used; Using index
select * from t1 where id=000000000001;
id
000000000001

View File

@ -22,14 +22,13 @@ drop table if exists t1,t2;
create table t1 (b char(0) not null, index(b));
The used table handler can't index column 'b'
create table t1 (a int not null auto_increment,primary key (a)) type=heap;
The used table type doesn't support AUTO_INCREMENT columns
create table t1 (a int not null,b text) type=heap;
The used table type doesn't support BLOB/TEXT columns
create table t1 (a int ,primary key(a)) type=heap;
All parts of a PRIMARY KEY must be NOT NULL; If you need NULL in a key, use UNIQUE instead
drop table if exists t1;
create table t1 (ordid int(8) not null auto_increment, ord varchar(50) not null, primary key (ord,ordid)) type=heap;
The used table type doesn't support AUTO_INCREMENT columns
Incorrect table definition; There can only be one auto column and it must be defined as a key
create table t1 (ordid int(8), primary key (ordid));
All parts of a PRIMARY KEY must be NOT NULL; If you need NULL in a key, use UNIQUE instead
create table not_existing_database.test (a int);
@ -62,8 +61,8 @@ create table t1 (a int auto_increment not null primary key, B CHAR(20));
insert into t1 (b) values ("hello"),("my"),("world");
create table t2 (key (b)) select * from t1;
explain select * from t2 where b="world";
table type possible_keys key key_len ref rows Extra
t2 ref B B 21 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ref B B 21 const 1 where used
select * from t2 where b="world";
a B
3 world
@ -72,10 +71,10 @@ create table t1(x varchar(50) );
create table t2 select x from t1 where 1=2;
describe t1;
Field Type Null Key Default Extra
x varchar(50) YES NULL
x varchar(50) character set latin1 YES NULL
describe t2;
Field Type Null Key Default Extra
x char(50) YES NULL
x char(50) character set latin1 YES NULL
drop table t2;
create table t2 select now() as a , curtime() as b, curdate() as c , 1+1 as d , 1.0 + 1 as e , 33333333333333333 + 3 as f;
describe t2;
@ -94,6 +93,24 @@ d date 0000-00-00
t time 00:00:00
dt datetime 0000-00-00 00:00:00
drop table t1,t2;
create table t1 (a tinyint);
create table t2 (a int) select * from t1;
describe t1;
Field Type Null Key Default Extra
a tinyint(4) YES NULL
describe t2;
Field Type Null Key Default Extra
a int(11) YES NULL
drop table if exists t2;
create table t2 (a int, a float) select * from t1;
Duplicate column name 'a'
drop table if exists t2;
create table t2 (a int) select a as b, a+1 as b from t1;
Duplicate column name 'b'
drop table if exists t2;
create table t2 (b int) select a as b, a+1 as b from t1;
Duplicate column name 'b'
drop table if exists t1,t2;
create table t1 (a int not null, b int, primary key(a), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b), key (b));
show create table t1;
Table Create Table
@ -132,7 +149,7 @@ t1 CREATE TABLE `t1` (
KEY `b_29` (`b`),
KEY `b_30` (`b`),
KEY `b_31` (`b`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;
create table t1 select if(1,'1','0'), month("2002-08-02");
drop table t1;

File diff suppressed because it is too large Load Diff

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@ -0,0 +1,20 @@
drop table if exists t1,t2,t3;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
select t1.a,t3.y from t1,(select a as y from t2 where b='c') as t3 where t1.a = t3.y;
a y
3 3
3 3
select t1.a,t3.a from t1,(select * from t2 where b='c') as t3 where t1.a = t3.a;
a a
3 3
3 3
CREATE TABLE t3 (a int not null, b char (10) not null);
insert into t3 values (3,'f'),(4,'y'),(5,'z'),(6,'c');
select t1.a,t4.y from t1,(select t2.a as y from t2,(select t3.b from t3 where t3.a>3) as t5 where t2.b=t5.b) as t4 where t1.a = t4.y;
a y
3 3
3 3
drop table if exists t1.t2,t3;

View File

@ -172,10 +172,10 @@ b
INSERT INTO t2 values (1),(2),(3);
INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2');
explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
table type possible_keys key key_len ref rows Extra
t3 index a a 5 NULL 6 Using index; Using temporary
t2 index a a 4 NULL 5 Using index; Distinct
t1 eq_ref PRIMARY PRIMARY 4 t2.a 1 where used; Distinct
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 index a a 5 NULL 6 Using index; Using temporary
1 SIMPLE t2 index a a 4 NULL 5 Using index; Distinct
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 t2.a 1 where used; Distinct
SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
a
1
@ -188,9 +188,9 @@ insert into t3 select * from t4;
insert into t4 select * from t3;
insert into t3 select * from t4;
explain select distinct t1.a from t1,t3 where t1.a=t3.a;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 2 Using index; Using temporary
t3 ref a a 5 t1.a 10 where used; Using index; Distinct
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index; Using temporary
1 SIMPLE t3 ref a a 5 t1.a 10 where used; Using index; Distinct
select distinct t1.a from t1,t3 where t1.a=t3.a;
a
1
@ -274,14 +274,14 @@ on j_lj_t3.id=t3_lj.id
WHERE
((t1.id=j_lj_t2.id AND t2_lj.id IS NULL) OR (t1.id=t2.id AND t2.idx=2))
AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2));
table type possible_keys key key_len ref rows Extra
t1 index id id 4 NULL 2 Using index; Using temporary
t2 index id id 8 NULL 1 Using index; Distinct
t3 index id id 8 NULL 1 Using index; Distinct
j_lj_t2 index id id 4 NULL 2 where used; Using index; Distinct
t2_lj index id id 8 NULL 1 where used; Using index; Distinct
j_lj_t3 index id id 4 NULL 2 where used; Using index; Distinct
t3_lj index id id 8 NULL 1 where used; Using index; Distinct
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index id id 4 NULL 2 Using index; Using temporary
1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct
1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct
1 SIMPLE j_lj_t2 index id id 4 NULL 2 where used; Using index; Distinct
1 SIMPLE t2_lj index id id 8 NULL 1 where used; Using index; Distinct
1 SIMPLE j_lj_t3 index id id 4 NULL 2 where used; Using index; Distinct
1 SIMPLE t3_lj index id id 8 NULL 1 where used; Using index; Distinct
SELECT DISTINCT
t1.id
from

View File

@ -9,22 +9,22 @@ select * from t1 where str="foo";
id str
3 foo
explain select * from t1 where str is null;
table type possible_keys key key_len ref rows Extra
t1 ref str str 11 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref str str 11 const 1 where used
explain select * from t1 where str="foo";
table type possible_keys key key_len ref rows Extra
t1 const str str 11 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const str str 11 const 1
explain select * from t1 ignore key (str) where str="foo";
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 where used
explain select * from t1 use key (str,str) where str="foo";
table type possible_keys key key_len ref rows Extra
t1 const str str 11 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const str str 11 const 1
explain select * from t1 use key (str,str,foo) where str="foo";
Key column 'foo' doesn't exist in table
explain select * from t1 ignore key (str,str,foo) where str="foo";
Key column 'foo' doesn't exist in table
drop table t1;
explain select 1;
Comment
No tables used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE No tables used

View File

@ -138,10 +138,10 @@ show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`ticket` int(11) default NULL,
`inhalt` text,
`inhalt` text character set latin1,
KEY `tig` (`ticket`),
FULLTEXT KEY `tix` (`inhalt`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
select * from t2 where MATCH inhalt AGAINST (NULL);
ticket inhalt
select * from t2 where MATCH inhalt AGAINST ('foobar');

View File

@ -225,19 +225,19 @@ key (score)
);
INSERT INTO t1 VALUES (1,1,1),(2,2,2),(2,1,1),(3,3,3),(4,3,3),(5,3,3);
explain select userid,count(*) from t1 group by userid desc;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
select userid,count(*) from t1 group by userid desc;
userid count(*)
3 3
2 1
1 2
explain select spid,count(*) from t1 where spid between 1 and 2 group by spid desc;
table type possible_keys key key_len ref rows Extra
t1 range spID spID 5 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range spID spID 5 NULL 2 where used; Using index
explain select spid,count(*) from t1 where spid between 1 and 2 group by spid;
table type possible_keys key key_len ref rows Extra
t1 range spID spID 5 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range spID spID 5 NULL 2 where used; Using index
select spid,count(*) from t1 where spid between 1 and 2 group by spid;
spid count(*)
1 1
@ -247,8 +247,8 @@ spid count(*)
2 2
1 1
explain select sql_big_result spid,sum(userid) from t1 group by spid desc;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 6 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using filesort
select sql_big_result spid,sum(userid) from t1 group by spid desc;
spid sum(userid)
5 3
@ -257,8 +257,8 @@ spid sum(userid)
2 3
1 1
explain select sql_big_result score,count(*) from t1 group by score desc;
table type possible_keys key key_len ref rows Extra
t1 index NULL score 3 NULL 6 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL score 3 NULL 6 Using index
select sql_big_result score,count(*) from t1 group by score desc;
score count(*)
3 3

View File

@ -65,10 +65,10 @@ a
869751
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
table type possible_keys key key_len ref rows Extra
t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
drop table t1;
create table t1 (x int not null, y int not null, key x(x), unique y(y))
create table t1 (x int not null, y int not null, key x (x), unique y (y))
type=heap;
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
select * from t1 where x=1;
@ -84,9 +84,9 @@ x y x y
2 5 2 2
2 6 2 2
explain select * from t1,t1 as t2 where t1.x=t2.y;
table type possible_keys key key_len ref rows Extra
t1 ALL x NULL NULL NULL 6
t2 eq_ref y y 4 t1.x 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL x NULL NULL NULL 6
1 SIMPLE t2 eq_ref y y 4 t1.x 1
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
@ -158,18 +158,18 @@ drop table t1;
create table t1 (btn char(10) not null, key(btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
table type possible_keys key key_len ref rows Extra
t1 ALL btn NULL NULL NULL 14 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL btn NULL NULL NULL 14 where used
select * from t1 where btn like "q%";
btn
alter table t1 add column new_col char(1) not null, add key (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
table type possible_keys key key_len ref rows Extra
t1 ALL btn NULL NULL NULL 14 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL btn NULL NULL NULL 14 where used
explain select * from t1 where btn="a" and new_col="a";
table type possible_keys key key_len ref rows Extra
t1 ref btn btn 11 const,const 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref btn btn 11 const,const 10 where used
drop table t1;
CREATE TABLE t1 (
a int default NULL,
@ -181,16 +181,16 @@ INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
a b
explain SELECT * FROM t1 WHERE a IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref a a 5 const 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 5 const 10 where used
SELECT * FROM t1 WHERE a<=>NULL;
a b
NULL 99
SELECT * FROM t1 WHERE b=NULL;
a b
explain SELECT * FROM t1 WHERE b IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ref b b 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref b b 5 const 1 where used
SELECT * FROM t1 WHERE b<=>NULL;
a b
99 NULL

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@ -0,0 +1,41 @@
drop table if exists t1;
create table t1 (a int not null auto_increment,b int, primary key (a)) type=heap auto_increment=3;
insert into t1 values (1,1),(NULL,3),(NULL,4);
delete from t1 where a=4;
insert into t1 values (NULL,5),(NULL,6);
select * from t1;
a b
1 1
3 3
5 5
6 6
delete from t1 where a=6;
replace t1 values (3,1);
ALTER TABLE t1 add c int;
replace t1 values (3,3,3);
insert into t1 values (NULL,7,7);
update t1 set a=8,b=b+1,c=c+1 where a=7;
insert into t1 values (NULL,9,9);
select * from t1;
a b c
1 1 NULL
3 3 3
5 5 NULL
8 8 8
9 9 9
drop table t1;
create table t1 (
skey tinyint unsigned NOT NULL auto_increment PRIMARY KEY,
sval char(20)
) type=heap;
insert into t1 values (NULL, "hello");
insert into t1 values (NULL, "hey");
select * from t1;
skey sval
1 hello
2 hey
select _rowid,t1._rowid,skey,sval from t1;
_rowid _rowid skey sval
1 1 1 hello
2 2 2 hey
drop table t1;

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@ -0,0 +1,218 @@
drop table if exists t1;
create table t1 (a int not null,b int not null, primary key using BTREE (a)) type=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a=1 or a=0;
show keys from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
t1 0 PRIMARY 1 a A NULL NULL NULL BTREE
select * from t1;
a b
2 2
3 3
4 4
select * from t1 where a=4;
a b
4 4
update t1 set b=5 where a=4;
update t1 set b=b+1 where a>=3;
replace t1 values (3,3);
select * from t1;
a b
2 2
3 3
4 6
alter table t1 add c int not null, add key using BTREE (c,a);
drop table t1;
create table t1 (a int not null,b int not null, primary key using BTREE (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a > 0;
select * from t1;
a b
drop table t1;
create table t1 (a int not null,b int not null, primary key using BTREE (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
alter table t1 modify a int not null auto_increment, type=myisam, comment="new myisam table";
select * from t1;
a b
1 1
2 2
3 3
4 4
drop table t1;
create table t1 (a int not null) type=heap;
insert into t1 values (869751),(736494),(226312),(802616);
select * from t1 where a > 736494;
a
869751
802616
alter table t1 add unique uniq_id using BTREE (a);
select * from t1 where a > 736494;
a
802616
869751
select * from t1 where a = 736494;
a
736494
select * from t1 where a=869751 or a=736494;
a
736494
869751
select * from t1 where a in (869751,736494,226312,802616);
a
226312
736494
802616
869751
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
drop table t1;
create table t1 (x int not null, y int not null, key x using BTREE (x), unique y using BTREE (y))
type=heap;
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
select * from t1 where x=1;
x y
1 1
1 3
select * from t1,t1 as t2 where t1.x=t2.y;
x y x y
1 1 1 1
2 2 2 2
1 3 1 1
2 4 2 2
2 5 2 2
2 6 2 2
explain select * from t1,t1 as t2 where t1.x=t2.y;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL x NULL NULL NULL 6
1 SIMPLE t2 eq_ref y y 4 t1.x 1
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
select max(a) from t1;
max(a)
1
drop table t1;
CREATE TABLE t1 ( a int not null default 0, b int not null default 0, key using BTREE (a,b), key using BTREE (b) ) TYPE=HEAP;
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
a b
1 1
1 2
1 3
1 4
1 5
1 6
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
a b
1 1
1 1
1 2
1 2
1 3
1 3
1 4
1 4
1 5
1 5
1 6
1 6
explain select * from tx where a=x order by a,b;
id select_type table type possible_keys key key_len ref rows Extra
x SIMPLE tx ref a a x const x where used
explain select * from tx where a=x order by b;
id select_type table type possible_keys key key_len ref rows Extra
x SIMPLE tx ref a a x const x where used
select * from t1 where b=1;
a b
1 1
1 1
explain select * from tx where b=x;
id select_type table type possible_keys key key_len ref rows Extra
x SIMPLE tx ref b b x const x where used
drop table t1;
create table t1 (id int unsigned not null, primary key using BTREE (id)) type=HEAP;
insert into t1 values(1);
select max(id) from t1;
max(id)
1
insert into t1 values(2);
select max(id) from t1;
max(id)
2
replace into t1 values(1);
drop table t1;
create table t1 (n int) type=heap;
drop table t1;
create table t1 (n int) type=heap;
drop table if exists t1;
CREATE table t1(f1 int not null,f2 char(20) not
null,index(f2)) type=heap;
INSERT into t1 set f1=12,f2="bill";
INSERT into t1 set f1=13,f2="bill";
INSERT into t1 set f1=14,f2="bill";
INSERT into t1 set f1=15,f2="bill";
INSERT into t1 set f1=16,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
delete from t1 where f2="bill";
select * from t1;
f1 f2
16 ted
12 ted
12 ted
12 ted
12 ted
drop table t1;
create table t1 (btn char(10) not null, key using BTREE (btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL btn NULL NULL NULL 14 where used
select * from t1 where btn like "q%";
btn
alter table t1 add column new_col char(1) not null, add key using BTREE (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref btn btn 10 const 1 where used
explain select * from t1 where btn="a" and new_col="a";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref btn btn 11 const,const 1 where used
drop table t1;
CREATE TABLE t1 (
a int default NULL,
b int default NULL,
KEY a using BTREE (a),
UNIQUE b using BTREE (b)
) type=heap;
INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
a b
explain SELECT * FROM t1 WHERE a IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 5 const 1 where used
SELECT * FROM t1 WHERE a<=>NULL;
a b
NULL 99
SELECT * FROM t1 WHERE b=NULL;
a b
explain SELECT * FROM t1 WHERE b IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref b b 5 const 1 where used
SELECT * FROM t1 WHERE b<=>NULL;
a b
99 NULL
INSERT INTO t1 VALUES (1,3);
Duplicate entry '3' for key 1
DROP TABLE t1;
CREATE TABLE t1 (a int not null, primary key using BTREE (a)) type=heap;
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
DELETE from t1 where a < 100;
SELECT * from t1;
a
DROP TABLE t1;

View File

@ -0,0 +1,205 @@
drop table if exists t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) type=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a=1 or a=0;
show keys from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
t1 0 PRIMARY 1 a NULL NULL NULL NULL HASH
select * from t1;
a b
2 2
3 3
4 4
select * from t1 where a=4;
a b
4 4
update t1 set b=5 where a=4;
update t1 set b=b+1 where a>=3;
replace t1 values (3,3);
select * from t1;
a b
2 2
3 3
4 6
alter table t1 add c int not null, add key using HASH (c,a);
drop table t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a > 0;
select * from t1;
a b
drop table t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
alter table t1 modify a int not null auto_increment, type=myisam, comment="new myisam table";
select * from t1;
a b
1 1
2 2
3 3
4 4
drop table t1;
create table t1 (a int not null) type=heap;
insert into t1 values (869751),(736494),(226312),(802616);
select * from t1 where a > 736494;
a
869751
802616
alter table t1 add unique uniq_id using HASH (a);
select * from t1 where a > 736494;
a
869751
802616
select * from t1 where a = 736494;
a
736494
select * from t1 where a=869751 or a=736494;
a
736494
869751
select * from t1 where a in (869751,736494,226312,802616);
a
226312
736494
802616
869751
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range uniq_id uniq_id 4 NULL 4 where used; Using index
drop table t1;
create table t1 (x int not null, y int not null, key x using HASH (x), unique y using HASH (y))
type=heap;
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
select * from t1 where x=1;
x y
1 3
1 1
select * from t1,t1 as t2 where t1.x=t2.y;
x y x y
1 1 1 1
2 2 2 2
1 3 1 1
2 4 2 2
2 5 2 2
2 6 2 2
explain select * from t1,t1 as t2 where t1.x=t2.y;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL x NULL NULL NULL 6
1 SIMPLE t2 eq_ref y y 4 t1.x 1
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
select max(a) from t1;
max(a)
1
drop table t1;
CREATE TABLE t1 ( a int not null default 0, b int not null default 0, key using HASH (a), key using HASH (b) ) TYPE=HEAP;
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
a b
1 6
1 5
1 4
1 3
1 2
1 1
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
a b
1 6
1 5
1 4
1 3
1 2
1 1
1 6
1 5
1 4
1 3
1 2
1 1
drop table t1;
create table t1 (id int unsigned not null, primary key using HASH (id)) type=HEAP;
insert into t1 values(1);
select max(id) from t1;
max(id)
1
insert into t1 values(2);
select max(id) from t1;
max(id)
2
replace into t1 values(1);
drop table t1;
create table t1 (n int) type=heap;
drop table t1;
create table t1 (n int) type=heap;
drop table if exists t1;
CREATE table t1(f1 int not null,f2 char(20) not
null,index(f2)) type=heap;
INSERT into t1 set f1=12,f2="bill";
INSERT into t1 set f1=13,f2="bill";
INSERT into t1 set f1=14,f2="bill";
INSERT into t1 set f1=15,f2="bill";
INSERT into t1 set f1=16,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
delete from t1 where f2="bill";
select * from t1;
f1 f2
16 ted
12 ted
12 ted
12 ted
12 ted
drop table t1;
create table t1 (btn char(10) not null, key using HASH (btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL btn NULL NULL NULL 14 where used
select * from t1 where btn like "q%";
btn
alter table t1 add column new_col char(1) not null, add key using HASH (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL btn NULL NULL NULL 14 where used
explain select * from t1 where btn="a" and new_col="a";
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref btn btn 11 const,const 10 where used
drop table t1;
CREATE TABLE t1 (
a int default NULL,
b int default NULL,
KEY a using HASH (a),
UNIQUE b using HASH (b)
) type=heap;
INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
a b
explain SELECT * FROM t1 WHERE a IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 5 const 10 where used
SELECT * FROM t1 WHERE a<=>NULL;
a b
NULL 99
SELECT * FROM t1 WHERE b=NULL;
a b
explain SELECT * FROM t1 WHERE b IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref b b 5 const 1 where used
SELECT * FROM t1 WHERE b<=>NULL;
a b
99 NULL
INSERT INTO t1 VALUES (1,3);
Duplicate entry '3' for key 1
DROP TABLE t1;
CREATE TABLE t1 (a int not null, primary key using HASH (a)) type=heap;
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
DELETE from t1 where a < 100;
SELECT * from t1;
a
DROP TABLE t1;

View File

@ -139,14 +139,14 @@ id parent_id level
1010 102 2
1015 102 2
explain select level from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 12 where used; Using index
explain select level,id from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 12 where used; Using index
explain select level,id,parent_id from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 12 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 12 where used
select level,id from t1 where level=1;
level id
1 1002
@ -596,8 +596,8 @@ id parent_id level
1025 102 2
1016 102 2
explain select level from t1 where level=1;
table type possible_keys key key_len ref rows Extra
t1 ref level level 1 const 6 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 6 where used; Using index
select level,id from t1 where level=1;
level id
1 1004
@ -758,8 +758,8 @@ DROP TABLE t1;
create table t1 (a int primary key,b int, c int, d int, e int, f int, g int, h int, i int, j int, k int, l int, m int, n int, o int, p int, q int, r int, s int, t int, u int, v int, w int, x int, y int, z int, a1 int, a2 int, a3 int, a4 int, a5 int, a6 int, a7 int, a8 int, a9 int, b1 int, b2 int, b3 int, b4 int, b5 int, b6 int) type = innodb;
insert into t1 values (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1);
explain select * from t1 where a > 0 and a < 50;
table type possible_keys key key_len ref rows Extra
t1 range PRIMARY PRIMARY 4 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 1 where used
drop table t1;
create table t1 (id int NOT NULL,id2 int NOT NULL,id3 int NOT NULL,dummy1 char(30),primary key (id,id2),index index_id3 (id3)) type=innodb;
insert into t1 values (0,0,0,'ABCDEFGHIJ'),(2,2,2,'BCDEFGHIJK'),(1,1,1,'CDEFGHIJKL');
@ -805,9 +805,9 @@ create table t1 (a char(20), index (a(5))) type=innodb;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` char(20) default NULL,
`a` char(20) character set latin1 default NULL,
KEY `a` (`a`)
) TYPE=InnoDB
) TYPE=InnoDB CHARSET=latin1
drop table t1;
create temporary table t1 (a int not null auto_increment, primary key(a)) type=innodb;
insert into t1 values (NULL),(NULL),(NULL);
@ -892,29 +892,29 @@ drop table t1;
create table t1 (a int not null, b int not null, c int not null, primary key (a),key(b)) type=innodb;
insert into t1 values (3,3,3),(1,1,1),(2,2,2),(4,4,4);
explain select * from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 4
explain select * from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 4 NULL 4
explain select * from t1 order by c;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select a from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 4 Using index
explain select b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 4 NULL 4 Using index
explain select a,b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 4 NULL 4 Using index
explain select a,b from t1;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 4 NULL 4 Using index
explain select a,b,c from t1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
drop table t1;
create table t1 (t int not null default 1, key (t)) type=innodb;
desc t1;

View File

@ -67,10 +67,10 @@ a int(11) PRI 0
b int(11) MUL 0
c int(11) 0
show full columns from t1;
Field Type Null Key Default Extra Privileges
a int(11) PRI 0 select,insert,update,references
b int(11) MUL 0 select,insert,update,references
c int(11) 0 select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
a int(11) PRI 0 select,insert,update,references
b int(11) MUL 0 select,insert,update,references
c int(11) 0 select,insert,update,references
show index from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
t1 0 PRIMARY 1 a A 4 NULL NULL BTREE

View File

@ -90,12 +90,12 @@ grp a c id a c d
2 3 c NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
explain select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1;
Comment
Impossible WHERE noticed after reading const tables
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables
explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 7
t2 eq_ref PRIMARY PRIMARY 8 t1.a 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 t1.a 1 where used
select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
grp a c id a c d a
1 1 a 1 1 a 1 1
@ -311,13 +311,13 @@ select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where
name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used; Not exists
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used
select count(*) from t1 left join t2 on (t1.id = t2.owner);
count(*)
4
@ -331,13 +331,13 @@ select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where
name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used; Not exists
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3
t2 ALL NULL NULL NULL NULL 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used
select count(*) from t2 right join t1 on (t1.id = t2.owner);
count(*)
4
@ -618,9 +618,9 @@ UNIQUE id (id,idx)
);
INSERT INTO t2 VALUES (1,1);
explain SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 2
t2 index id id 8 NULL 1 where used; Using index; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 index id id 8 NULL 1 where used; Using index; Not exists
SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
id name id idx
2 no NULL NULL
@ -638,9 +638,9 @@ create table t2 (fooID smallint unsigned not null, barID smallint unsigned not n
insert into t1 (fooID) values (10),(20),(30);
insert into t2 values (10,1),(20,2),(30,3);
explain select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
table type possible_keys key key_len ref rows Extra
t2 index NULL PRIMARY 4 NULL 3 Using index
t1 eq_ref PRIMARY PRIMARY 2 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL PRIMARY 4 NULL 3 Using index
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 2 const 1 where used; Using index
select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
fooID barID fooID
10 1 NULL

View File

@ -34,9 +34,9 @@ C c a a
D E a a
a a a a
explain select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B;
table type possible_keys key key_len ref rows Extra
t1 ALL a NULL NULL NULL 5
t2 ALL b NULL NULL NULL 5 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL a NULL NULL NULL 5
1 SIMPLE t2 ALL b NULL NULL NULL 5 where used
select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B order by binary t1.a,t2.a;
a b a b
A B a a

View File

@ -12,9 +12,9 @@ select * from t1 where t1 like "a_\%";
t1
AB%
describe select * from t1 where t1="ABC";
table type possible_keys key key_len ref rows Extra
t1 const PRIMARY PRIMARY 3 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const PRIMARY PRIMARY 3 const 1
describe select * from t1 where t1="ABCD";
Comment
Impossible WHERE noticed after reading const tables
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables
drop table t1;

View File

@ -34,11 +34,11 @@ insert into t2 select NULL,message from t1;
insert into t1 select NULL,message from t2;
create table t3 (a int not null, b char(20), key(a)) type=MERGE UNION=(test.t1,test.t2);
explain select * from t3 where a < 10;
table type possible_keys key key_len ref rows Extra
t3 range a a 4 NULL 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 range a a 4 NULL 10 where used
explain select * from t3 where a > 10 and a < 20;
table type possible_keys key key_len ref rows Extra
t3 range a a 4 NULL 10 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 range a a 4 NULL 10 where used
select * from t3 where a = 10;
a b
10 Testing
@ -84,8 +84,8 @@ a b
19 Testing
19 Testing
explain select a from t3 order by a desc limit 10;
table type possible_keys key key_len ref rows Extra
t3 index NULL a 4 NULL 1131 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 index NULL a 4 NULL 1131 Using index
select a from t3 order by a desc limit 10;
a
699
@ -172,9 +172,9 @@ show create table t3;
Table Create Table
t3 CREATE TABLE `t3` (
`a` int(11) NOT NULL default '0',
`b` char(20) default NULL,
`b` char(20) character set latin1 default NULL,
KEY `a` (`a`)
) TYPE=MRG_MyISAM UNION=(t1,t2)
) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
create table t4 (a int not null, b char(10), key(a)) type=MERGE UNION=(t1,t2);
select * from t4;
Can't open file: 't4.MRG'. (errno: 143)
@ -249,14 +249,14 @@ t3 CREATE TABLE `t3` (
`incr` int(11) NOT NULL default '0',
`othr` int(11) NOT NULL default '0',
PRIMARY KEY (`incr`)
) TYPE=MRG_MyISAM UNION=(t1,t2)
) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
alter table t3 drop primary key;
show create table t3;
Table Create Table
t3 CREATE TABLE `t3` (
`incr` int(11) NOT NULL default '0',
`othr` int(11) NOT NULL default '0'
) TYPE=MRG_MyISAM UNION=(t1,t2)
) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
drop table t3,t2,t1;
create table t1 (a int not null) type=merge;
select * from t1;
@ -287,28 +287,28 @@ t3 CREATE TABLE `t3` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL default '0',
KEY `a` (`a`,`b`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
show create table t4;
Table Create Table
t4 CREATE TABLE `t4` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL default '0',
KEY `a` (`a`,`b`)
) TYPE=MRG_MyISAM UNION=(t1,t2)
) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
show create table t5;
Table Create Table
t5 CREATE TABLE `t5` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL auto_increment,
PRIMARY KEY (`a`,`b`)
) TYPE=MRG_MyISAM INSERT_METHOD=FIRST UNION=(t1,t2)
) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(t1,t2)
show create table t6;
Table Create Table
t6 CREATE TABLE `t6` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL auto_increment,
PRIMARY KEY (`a`,`b`)
) TYPE=MRG_MyISAM INSERT_METHOD=LAST UNION=(t1,t2)
) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=LAST UNION=(t1,t2)
insert into t1 values (1,NULL),(1,NULL),(1,NULL),(1,NULL);
insert into t2 values (2,NULL),(2,NULL),(2,NULL),(2,NULL);
select * from t3 order by b,a limit 3;
@ -373,7 +373,7 @@ t4 CREATE TABLE `t4` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL default '0',
KEY `a` (`a`,`b`)
) TYPE=MRG_MyISAM UNION=(t1,t2,t3)
) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2,t3)
select * from t4 order by a,b;
a b
1 1
@ -399,7 +399,7 @@ t4 CREATE TABLE `t4` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL default '0',
KEY `a` (`a`,`b`)
) TYPE=MRG_MyISAM INSERT_METHOD=FIRST UNION=(t1,t2,t3)
) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(t1,t2,t3)
insert into t4 values (4,1),(4,2);
select * from t1 order by a,b;
a b

View File

@ -1,7 +1,7 @@
drop table if exists t1;
CREATE TABLE t1 (
STRING_DATA char(255) default NULL,
KEY STRING_DATA (STRING_DATA)
KEY string_data (STRING_DATA)
) TYPE=MyISAM;
INSERT INTO t1 VALUES ('AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA');
INSERT INTO t1 VALUES ('DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD');
@ -51,29 +51,29 @@ drop table t1;
create table t1 (a int not null, b int not null, c int not null, primary key (a),key(b)) type=myisam;
insert into t1 values (3,3,3),(1,1,1),(2,2,2),(4,4,4);
explain select * from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select * from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select * from t1 order by c;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select a from t1 order by a;
table type possible_keys key key_len ref rows Extra
t1 index NULL PRIMARY 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 4 Using index
explain select b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 index NULL b 4 NULL 4 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 4 NULL 4 Using index
explain select a,b from t1 order by b;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4 Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using filesort
explain select a,b from t1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
explain select a,b,c from t1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
drop table t1;
CREATE TABLE `t1` (
`post_id` mediumint(8) unsigned NOT NULL auto_increment,

View File

@ -2,38 +2,38 @@ drop table if exists t1;
create table t1 (a int, b int not null,unique key (a,b),index(b)) type=myisam;
insert ignore into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(null,7),(9,9),(8,8),(7,7),(null,9),(null,9),(6,6);
explain select * from t1 where a is null;
table type possible_keys key key_len ref rows Extra
t1 ref a a 5 const 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 5 const 3 where used; Using index
explain select * from t1 where a is null and b = 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 9 const,const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 9 const,const 1 where used; Using index
explain select * from t1 where a is null and b = 7;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 9 const,const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 9 const,const 1 where used; Using index
explain select * from t1 where a=2 and b = 2;
table type possible_keys key key_len ref rows Extra
t1 const a,b a 9 const,const 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const a,b a 9 const,const 1
explain select * from t1 where a<=>b limit 2;
table type possible_keys key key_len ref rows Extra
t1 index NULL a 9 NULL 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL a 9 NULL 12 where used; Using index
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 9 NULL 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a,b a 9 NULL 3 where used; Using index
explain select * from t1 where (a is null or a = 7) and b=7;
table type possible_keys key key_len ref rows Extra
t1 ref a,b b 4 const 2 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b b 4 const 2 where used
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 3 where used; Using index
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 9 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a,b a 9 NULL 2 where used; Using index
explain select * from t1 where a > 1 and a < 3 limit 1;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 1 where used; Using index
explain select * from t1 where a > 8 and a < 9;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 1 where used; Using index
select * from t1 where a is null;
a b
NULL 7
@ -65,44 +65,44 @@ NULL 9
NULL 9
alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
explain select * from t1 where a is null and b = 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 3 where used
explain select * from t1 where a is null and b = 2 and c=0;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 3 where used
explain select * from t1 where a is null and b = 7 and c=0;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 3 where used
explain select * from t1 where a=2 and b = 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 1 where used
explain select * from t1 where a<=>b limit 2;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 12 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 12 where used
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 and c=0 limit 3;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 5 NULL 5 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a,b a 5 NULL 5 where used
explain select * from t1 where (a is null or a = 7) and b=7 and c=0;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 5 NULL 4 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a,b a 5 NULL 4 where used
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 3 where used
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
table type possible_keys key key_len ref rows Extra
t1 ref a,b a 5 const 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 3 where used
explain select * from t1 where a > 1 and a < 3 limit 1;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 1 where used
explain select * from t1 where a is null and b=7 or a > 1 and a < 3 limit 1;
table type possible_keys key key_len ref rows Extra
t1 range a,b a 5 NULL 4 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a,b a 5 NULL 4 where used
explain select * from t1 where a > 8 and a < 9;
table type possible_keys key key_len ref rows Extra
t1 range a a 5 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 1 where used
explain select * from t1 where b like "6%";
table type possible_keys key key_len ref rows Extra
t1 range b b 12 NULL 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range b b 12 NULL 1 where used
select * from t1 where a is null;
a b c
NULL 7 0
@ -151,11 +151,11 @@ PRIMARY KEY (id)
INSERT INTO t1 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
INSERT INTO t2 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
explain select id from t1 where uniq_id is null;
table type possible_keys key key_len ref rows Extra
t1 ref idx1 idx1 5 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref idx1 idx1 5 const 1 where used
explain select id from t1 where uniq_id =1;
table type possible_keys key key_len ref rows Extra
t1 const idx1 idx1 5 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const idx1 idx1 5 const 1
UPDATE t1 SET id=id+100 where uniq_id is null;
UPDATE t2 SET id=id+100 where uniq_id is null;
select id from t1 where uniq_id is null;

View File

@ -11,6 +11,6 @@ a b
select * from t1 where a is null;
a b
explain select * from t1 where b is null;
Comment
Impossible WHERE noticed after reading const tables
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables
drop table t1;

View File

@ -263,14 +263,14 @@ drop table t1;
create table t1 (a int not null, b int, c varchar(10), key (a, b, c));
insert into t1 values (1, NULL, NULL), (1, NULL, 'b'), (1, 1, NULL), (1, 1, 'b'), (1, 1, 'b'), (2, 1, 'a'), (2, 1, 'b'), (2, 2, 'a'), (2, 2, 'b'), (2, 3, 'c'),(1,3,'b');
explain select * from t1 where (a = 1 and b is null and c = 'b') or (a > 2) order by a desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 20 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 20 NULL 2 where used; Using index
select * from t1 where (a = 1 and b is null and c = 'b') or (a > 2) order by a desc;
a b c
1 NULL b
explain select * from t1 where a >= 1 and a < 3 order by a desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 4 NULL 10 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 4 NULL 10 where used; Using index
select * from t1 where a >= 1 and a < 3 order by a desc;
a b c
2 3 c
@ -285,8 +285,8 @@ a b c
1 NULL b
1 NULL NULL
explain select * from t1 where a = 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 ref a a 4 const 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 4 const 5 where used; Using index
select * from t1 where a = 1 order by a desc, b desc;
a b c
1 3 b
@ -296,35 +296,35 @@ a b c
1 NULL b
1 NULL NULL
explain select * from t1 where a = 1 and b is null order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 ref a a 9 const,const 2 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 9 const,const 2 where used; Using index; Using filesort
select * from t1 where a = 1 and b is null order by a desc, b desc;
a b c
1 NULL NULL
1 NULL b
explain select * from t1 where a >= 1 and a < 3 and b >0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 8 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 9 NULL 8 where used; Using index; Using filesort
explain select * from t1 where a = 2 and b >0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 9 NULL 5 where used; Using index
explain select * from t1 where a = 2 and b is null order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 ref a a 9 const,const 1 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 9 const,const 1 where used; Using index; Using filesort
explain select * from t1 where a = 2 and (b is null or b > 0) order by a
desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 6 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 9 NULL 6 where used; Using index
explain select * from t1 where a = 2 and b > 0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 9 NULL 5 where used; Using index
explain select * from t1 where a = 2 and b < 2 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 2 where used; Using index; Using filesort
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 9 NULL 2 where used; Using index; Using filesort
alter table t1 modify b int not null, modify c varchar(10) not null;
explain select * from t1 order by a, b, c;
table type possible_keys key key_len ref rows Extra
t1 index NULL a 18 NULL 11 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL a 18 NULL 11 Using index
select * from t1 order by a, b, c;
a b c
1 0
@ -339,8 +339,8 @@ a b c
2 2 b
2 3 c
explain select * from t1 order by a desc, b desc, c desc;
table type possible_keys key key_len ref rows Extra
t1 index NULL a 18 NULL 11 Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL a 18 NULL 11 Using index
select * from t1 order by a desc, b desc, c desc;
a b c
2 3 c
@ -355,15 +355,15 @@ a b c
1 0 b
1 0
explain select * from t1 where (a = 1 and b = 1 and c = 'b') or (a > 2) order by a desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 18 NULL 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 18 NULL 3 where used; Using index
select * from t1 where (a = 1 and b = 1 and c = 'b') or (a > 2) order by a desc;
a b c
1 1 b
1 1 b
explain select * from t1 where a < 2 and b <= 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 4 NULL 6 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 4 NULL 6 where used; Using index
select * from t1 where a < 2 and b <= 1 order by a desc, b desc;
a b c
1 1 b
@ -386,8 +386,8 @@ a b c
1 1 b
1 1
explain select * from t1 where a between 1 and 3 and b <= 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 8 NULL 10 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 8 NULL 10 where used; Using index
select * from t1 where a between 1 and 3 and b <= 1 order by a desc, b desc;
a b c
2 1 b
@ -398,8 +398,8 @@ a b c
1 0 b
1 0
explain select * from t1 where a between 0 and 1 order by a desc, b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 4 NULL 5 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 4 NULL 5 where used; Using index
select * from t1 where a between 0 and 1 order by a desc, b desc;
a b c
1 3 b
@ -449,27 +449,27 @@ gid sid uid
104505 5 117
103853 5 250
EXPLAIN select t1.gid, t2.sid, t3.uid from t3, t2, t1 where t2.gid = t1.gid and t2.uid = t3.uid order by t1.gid, t3.uid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index
t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 6 Using index
1 SIMPLE t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.gid = t3.uid order by t1.gid,t3.skr;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index
t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 6 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
EXPLAIN SELECT t1.gid, t2.sid, t3.uid from t2, t1, t3 where t2.gid = t1.gid and t2.uid = t3.uid order by t3.uid, t1.gid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
1 SIMPLE t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 where used; Using index
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.gid = t3.uid order by t3.skr,t1.gid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 where used
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.skr = t3.uid order by t1.gid,t3.skr;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 2 t1.skr 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 2 t1.skr 1 where used
drop table t1,t2,t3;
CREATE TABLE t1 (
`titre` char(80) NOT NULL default '',

View File

@ -15,8 +15,8 @@ event_date type event_id
1999-07-13 100600 26
1999-07-14 100600 10
explain select event_date,type,event_id from t1 WHERE type = 100601 and event_date >= "1999-07-01" AND event_date < "1999-07-15" AND (type=100600 OR type=100100) ORDER BY event_date;
Comment
Impossible WHERE
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE
select event_date,type,event_id from t1 WHERE event_date >= "1999-07-01" AND event_date <= "1999-07-15" AND (type=100600 OR type=100100) or event_date >= "1999-07-01" AND event_date <= "1999-07-15" AND type=100099;
event_date type event_id
1999-07-10 100100 24

View File

@ -4,9 +4,26 @@ begin work;
insert into t1 values (4);
insert into t1 values (5);
rollback;
Warning: Some non-transactional changed tables couldn't be rolled back
Warnings:
Warning 1196 Some non-transactional changed tables couldn't be rolled back
select @@warning_count;
@@warning_count
1
select @@error_count;
@@error_count
0
show warnings;
Level Code Message
Warning 1196 Some non-transactional changed tables couldn't be rolled back
show errors;
Level Code Message
select * from t1;
n
4
5
select @@warning_count;
@@warning_count
0
show warnings;
Level Code Message
drop table t1;

View File

@ -17,24 +17,24 @@ drop table t1;
show binlog events;
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.001 4 Start 1 4 Server ver: VERSION, Binlog ver: 3
master-bin.001 79 Query 1 79 use test; create table t1(n int not null auto_increment primary key)
master-bin.001 79 Query 1 79 use `test`; create table t1(n int not null auto_increment primary key)
master-bin.001 172 Intvar 1 172 INSERT_ID=1
master-bin.001 200 Query 1 200 use test; insert into t1 values (NULL)
master-bin.001 263 Query 1 263 use test; drop table t1
master-bin.001 311 Query 1 311 use test; create table t1 (word char(20) not null)
master-bin.001 200 Query 1 200 use `test`; insert into t1 values (NULL)
master-bin.001 263 Query 1 263 use `test`; drop table t1
master-bin.001 311 Query 1 311 use `test`; create table t1 (word char(20) not null)
master-bin.001 386 Create_file 1 386 db=test;table=t1;file_id=1;block_len=81
master-bin.001 556 Exec_load 1 556 ;file_id=1
master-bin.001 579 Query 1 579 use test; drop table t1
master-bin.001 579 Query 1 579 use `test`; drop table t1
show binlog events from 79 limit 1;
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.001 79 Query 1 79 use test; create table t1(n int not null auto_increment primary key)
master-bin.001 79 Query 1 79 use `test`; create table t1(n int not null auto_increment primary key)
show binlog events from 79 limit 2;
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.001 79 Query 1 79 use test; create table t1(n int not null auto_increment primary key)
master-bin.001 79 Query 1 79 use `test`; create table t1(n int not null auto_increment primary key)
master-bin.001 172 Intvar 1 172 INSERT_ID=1
show binlog events from 79 limit 2,1;
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.001 200 Query 1 200 use test; insert into t1 values (NULL)
master-bin.001 200 Query 1 200 use `test`; insert into t1 values (NULL)
flush logs;
slave start;
flush logs;
@ -45,20 +45,20 @@ drop table t1;
show binlog events;
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.001 4 Start 1 4 Server ver: VERSION, Binlog ver: 3
master-bin.001 79 Query 1 79 use test; create table t1(n int not null auto_increment primary key)
master-bin.001 79 Query 1 79 use `test`; create table t1(n int not null auto_increment primary key)
master-bin.001 172 Intvar 1 172 INSERT_ID=1
master-bin.001 200 Query 1 200 use test; insert into t1 values (NULL)
master-bin.001 263 Query 1 263 use test; drop table t1
master-bin.001 311 Query 1 311 use test; create table t1 (word char(20) not null)
master-bin.001 200 Query 1 200 use `test`; insert into t1 values (NULL)
master-bin.001 263 Query 1 263 use `test`; drop table t1
master-bin.001 311 Query 1 311 use `test`; create table t1 (word char(20) not null)
master-bin.001 386 Create_file 1 386 db=test;table=t1;file_id=1;block_len=81
master-bin.001 556 Exec_load 1 556 ;file_id=1
master-bin.001 579 Query 1 579 use test; drop table t1
master-bin.001 579 Query 1 579 use `test`; drop table t1
master-bin.001 627 Rotate 1 627 master-bin.002;pos=4
show binlog events in 'master-bin.002';
Log_name Pos Event_type Server_id Orig_log_pos Info
master-bin.002 4 Query 1 4 use test; create table t1 (n int)
master-bin.002 62 Query 1 62 use test; insert into t1 values (1)
master-bin.002 122 Query 1 122 use test; drop table t1
master-bin.002 4 Query 1 4 use `test`; create table t1 (n int)
master-bin.002 62 Query 1 62 use `test`; insert into t1 values (1)
master-bin.002 122 Query 1 122 use `test`; drop table t1
show master logs;
Log_name
master-bin.001
@ -71,20 +71,20 @@ slave-bin.002
show binlog events in 'slave-bin.001' from 4;
Log_name Pos Event_type Server_id Orig_log_pos Info
slave-bin.001 4 Start 2 4 Server ver: VERSION, Binlog ver: 3
slave-bin.001 79 Query 1 79 use test; create table t1(n int not null auto_increment primary key)
slave-bin.001 79 Query 1 79 use `test`; create table t1(n int not null auto_increment primary key)
slave-bin.001 172 Intvar 1 200 INSERT_ID=1
slave-bin.001 200 Query 1 200 use test; insert into t1 values (NULL)
slave-bin.001 263 Query 1 263 use test; drop table t1
slave-bin.001 311 Query 1 311 use test; create table t1 (word char(20) not null)
slave-bin.001 200 Query 1 200 use `test`; insert into t1 values (NULL)
slave-bin.001 263 Query 1 263 use `test`; drop table t1
slave-bin.001 311 Query 1 311 use `test`; create table t1 (word char(20) not null)
slave-bin.001 386 Create_file 1 386 db=test;table=t1;file_id=1;block_len=81
slave-bin.001 565 Exec_load 1 556 ;file_id=1
slave-bin.001 588 Query 1 579 use test; drop table t1
slave-bin.001 588 Query 1 579 use `test`; drop table t1
slave-bin.001 636 Rotate 2 636 slave-bin.002;pos=4
show binlog events in 'slave-bin.002' from 4;
Log_name Pos Event_type Server_id Orig_log_pos Info
slave-bin.002 4 Query 1 4 use test; create table t1 (n int)
slave-bin.002 62 Query 1 62 use test; insert into t1 values (1)
slave-bin.002 122 Query 1 122 use test; drop table t1
slave-bin.002 4 Query 1 4 use `test`; create table t1 (n int)
slave-bin.002 62 Query 1 62 use `test`; insert into t1 values (1)
slave-bin.002 122 Query 1 122 use `test`; drop table t1
show slave status;
Master_Host Master_User Master_Port Connect_retry Master_Log_File Read_Master_Log_Pos Relay_Log_File Relay_Log_Pos Relay_Master_Log_File Slave_IO_Running Slave_SQL_Running Replicate_do_db Replicate_ignore_db Last_errno Last_error Skip_counter Exec_master_log_pos Relay_log_space
127.0.0.1 root MASTER_PORT 1 master-bin.002 170 slave-relay-bin.002 957 master-bin.002 Yes Yes 0 0 170 961

View File

@ -1327,20 +1327,20 @@ fld3
select t2.fld3 from t2 where fld3 LIKE 'don_t_find_me_please%';
fld3
explain select t2.fld3 from t2 where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 ignore index (fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 index NULL fld3 30 NULL 1199 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL fld3 30 NULL 1199 where used; Using index
explain select fld3 from t2 use index (fld1) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 index NULL fld3 30 NULL 1199 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL fld3 30 NULL 1199 where used; Using index
explain select fld3 from t2 use index (fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 use index (fld1,fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 ignore index (fld3,not_used);
Key column 'not_used' doesn't exist in table
explain select fld3 from t2 use index (not_used);
@ -1350,8 +1350,8 @@ fld3
honeysuckle
honoring
explain select t2.fld3 from t2 where fld3 >= 'honeysuckle' and fld3 <= 'honoring' order by fld3;
table type possible_keys key key_len ref rows Extra
t2 range fld3 fld3 30 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 range fld3 fld3 30 NULL 2 where used; Using index
select fld1,fld3 from t2 where fld3="Colombo" or fld3 = "nondecreasing" order by fld3;
fld1 fld3
148504 Colombo
@ -1370,8 +1370,8 @@ fld1
250501
250502
explain select fld1 from t2 where fld1=250501 or fld1="250502";
table type possible_keys key key_len ref rows Extra
t2 range fld1 fld1 4 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 range fld1 fld1 4 NULL 2 where used; Using index
select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502;
fld1
250501
@ -1379,8 +1379,8 @@ fld1
250505
250601
explain select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502;
table type possible_keys key key_len ref rows Extra
t2 range fld1 fld1 4 NULL 4 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 range fld1 fld1 4 NULL 4 where used; Using index
select fld1,fld3 from t2 where companynr = 37 and fld3 like 'f%';
fld1 fld3
218401 faithful
@ -1806,21 +1806,21 @@ companynr rtrim(space(512+companynr))
select distinct fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by fld3;
fld3
explain select t3.t2nr,fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by t3.t2nr,fld3;
table type possible_keys key key_len ref rows Extra
t2 ALL fld1 NULL NULL NULL 1199 where used; Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 4 t2.fld1 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL fld1 NULL NULL NULL 1199 where used; Using temporary; Using filesort
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 t2.fld1 1 where used; Using index
explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period;
table type possible_keys key key_len ref rows Extra
t1 ALL period NULL NULL NULL 41810 Using temporary; Using filesort
t3 ref period period 4 t1.period 4181
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL period NULL NULL NULL 41810 Using temporary; Using filesort
1 SIMPLE t3 ref period period 4 t1.period 4181
explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period limit 10;
table type possible_keys key key_len ref rows Extra
t3 index period period 4 NULL 41810
t1 ref period period 4 t3.period 4181
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 index period period 4 NULL 41810
1 SIMPLE t1 ref period period 4 t3.period 4181
explain select * from t3 as t1,t3 where t1.period=t3.period order by t1.period limit 10;
table type possible_keys key key_len ref rows Extra
t1 index period period 4 NULL 41810
t3 ref period period 4 t1.period 4181
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index period period 4 NULL 41810
1 SIMPLE t3 ref period period 4 t1.period 4181
select period from t1;
period
9410
@ -1833,9 +1833,9 @@ select fld3,period from t2,t3 where t2.fld1 = 011401 and t2.fld1=t3.t2nr and t3.
fld3 period
breaking 1001
explain select fld3,period from t2,t3 where t2.fld1 = 011401 and t3.t2nr=t2.fld1 and 1001 = t3.period;
table type possible_keys key key_len ref rows Extra
t2 const fld1 fld1 4 const 1
t3 const PRIMARY,period PRIMARY 4 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 const fld1 fld1 4 const 1
1 SIMPLE t3 const PRIMARY,period PRIMARY 4 const 1
select fld3,period from t2,t1 where companynr*10 = 37*10;
fld3 period
breaking 9410
@ -2573,21 +2573,21 @@ fld1 fld1
select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
companynr companyname
explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199
t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 where used; Not exists
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
table type possible_keys key key_len ref rows Extra
t4 ALL NULL NULL NULL NULL 12
t2 ALL NULL NULL NULL NULL 1199 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 where used; Not exists
select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
companynr companynr
37 36
41 40
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199 Using temporary
t4 index NULL PRIMARY 1 NULL 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using temporary
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 where used; Using index
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
fld1 companynr fld3 period
038008 37 reporters 1008
@ -3096,11 +3096,11 @@ select t2.fld1,sum(price) from t3,t2 where t2.fld1 = t3.t2nr and t3.companynr =
fld1 sum(price)
038008 234298
explain select fld3 from t2 where 1>2 or 2>3;
Comment
Impossible WHERE
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE
explain select fld3 from t2 where fld1=fld1;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199
select companynr,fld1 from t2 HAVING fld1=250501 or fld1=250502;
companynr fld1
34 250501
@ -3151,8 +3151,8 @@ select count(*) from t3 where companynr=512 and price2=76234234;
count(*)
4181
explain select min(fld1),max(fld1),count(*) from t2;
Comment
Select tables optimized away
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Select tables optimized away
select min(fld1),max(fld1),count(*) from t2;
min(fld1) max(fld1) count(*)
0 1232609 1199
@ -3219,23 +3219,23 @@ Tables_in_test (s%)
show tables from test like "t?";
Tables_in_test (t?)
show full columns from t2;
Field Type Null Key Default Extra Privileges
auto int(11) PRI NULL auto_increment select,insert,update,references
fld1 int(6) unsigned zerofill UNI 000000 select,insert,update,references
companynr tinyint(2) unsigned zerofill 00 select,insert,update,references
fld3 char(30) MUL select,insert,update,references
fld4 char(35) select,insert,update,references
fld5 char(35) select,insert,update,references
fld6 char(4) select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
auto int(11) PRI NULL auto_increment select,insert,update,references
fld1 int(6) unsigned zerofill UNI 000000 select,insert,update,references
companynr tinyint(2) unsigned zerofill 00 select,insert,update,references
fld3 char(30) character set latin1 MUL select,insert,update,references
fld4 char(35) character set latin1 select,insert,update,references
fld5 char(35) character set latin1 select,insert,update,references
fld6 char(4) character set latin1 select,insert,update,references
show full columns from t2 from test like 'f%';
Field Type Null Key Default Extra Privileges
fld1 int(6) unsigned zerofill UNI 000000 select,insert,update,references
fld3 char(30) MUL select,insert,update,references
fld4 char(35) select,insert,update,references
fld5 char(35) select,insert,update,references
fld6 char(4) select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
fld1 int(6) unsigned zerofill UNI 000000 select,insert,update,references
fld3 char(30) character set latin1 MUL select,insert,update,references
fld4 char(35) character set latin1 select,insert,update,references
fld5 char(35) character set latin1 select,insert,update,references
fld6 char(4) character set latin1 select,insert,update,references
show full columns from t2 from test like 's%';
Field Type Null Key Default Extra Privileges
Field Type Null Key Default Extra Privileges Comment
show keys from t2;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
t2 0 PRIMARY 1 auto A 1199 NULL NULL BTREE

View File

@ -43,7 +43,7 @@ wait_timeout 28800
show variables like "this_doesn't_exists%";
Variable_name Value
show table status from test like "this_doesn't_exists%";
Name Type Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Create_options Comment
Name Type Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Charset Create_options Comment
show databases;
Database
mysql
@ -77,24 +77,31 @@ show create table t1;
Table Create Table
t1 CREATE TEMPORARY TABLE `t1` (
`a` int(11) NOT NULL default '0'
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
alter table t1 rename t2;
show create table t2;
Table Create Table
t2 CREATE TEMPORARY TABLE `t2` (
`a` int(11) NOT NULL default '0'
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t2;
create table t1 (
test_set set( 'val1', 'val2', 'val3' ) not null default '',
name char(20) default 'O''Brien'
name char(20) default 'O''Brien' comment 'O''Brien as default',
c int not null comment 'int column'
) comment = 'it\'s a table' ;
show create table t1 ;
Table Create Table
t1 CREATE TABLE `t1` (
`test_set` set('val1','val2','val3') NOT NULL default '',
`name` char(20) default 'O''Brien'
) TYPE=MyISAM COMMENT='it''s a table'
`name` char(20) character set latin1 default 'O''Brien' COMMENT 'O''Brien as default',
`c` int(11) NOT NULL default '0' COMMENT 'int column'
) TYPE=MyISAM CHARSET=latin1 COMMENT='it''s a table'
show full columns from t1;
Field Type Null Key Default Extra Privileges Comment
test_set set('val1','val2','val3') select,insert,update,references
name char(20) character set latin1 YES O'Brien select,insert,update,references O'Brien as default
c int(11) 0 select,insert,update,references int column
drop table t1;
create table t1 (a int not null, unique aa (a));
show create table t1;
@ -102,7 +109,7 @@ Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
UNIQUE KEY `aa` (`a`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;
create table t1 (a int not null, primary key (a));
show create table t1;
@ -110,7 +117,7 @@ Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
PRIMARY KEY (`a`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;
flush tables;
show open tables;
@ -126,25 +133,25 @@ show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
`b` char(10) default NULL,
`b` char(10) character set latin1 default NULL,
KEY `b` (`b`)
) TYPE=MyISAM MIN_ROWS=10 MAX_ROWS=100 AVG_ROW_LENGTH=10 PACK_KEYS=1 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=FIXED COMMENT='test'
) TYPE=MyISAM CHARSET=latin1 MIN_ROWS=10 MAX_ROWS=100 AVG_ROW_LENGTH=10 PACK_KEYS=1 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=FIXED COMMENT='test'
alter table t1 MAX_ROWS=200 ROW_FORMAT=dynamic PACK_KEYS=0;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
`b` varchar(10) default NULL,
`b` varchar(10) character set latin1 default NULL,
KEY `b` (`b`)
) TYPE=MyISAM MIN_ROWS=10 MAX_ROWS=200 AVG_ROW_LENGTH=10 PACK_KEYS=0 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=DYNAMIC COMMENT='test'
) TYPE=MyISAM CHARSET=latin1 MIN_ROWS=10 MAX_ROWS=200 AVG_ROW_LENGTH=10 PACK_KEYS=0 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=DYNAMIC COMMENT='test'
ALTER TABLE t1 AVG_ROW_LENGTH=0 CHECKSUM=0 COMMENT="" MIN_ROWS=0 MAX_ROWS=0 PACK_KEYS=DEFAULT DELAY_KEY_WRITE=0 ROW_FORMAT=default;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL default '0',
`b` varchar(10) default NULL,
`b` varchar(10) character set latin1 default NULL,
KEY `b` (`b`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;
create table t1 (a decimal(9,2), b decimal (9,0), e double(9,2), f double(5,0), h float(3,2), i float(3,0));
show columns from t1;
@ -155,6 +162,14 @@ e double(9,2) YES NULL
f double(5,0) YES NULL
h float(3,2) YES NULL
i float(3,0) YES NULL
show full columns from t1;
Field Type Null Key Default Extra Privileges Comment
a decimal(9,2) YES NULL select,insert,update,references
b decimal(9,0) YES NULL select,insert,update,references
e double(9,2) YES NULL select,insert,update,references
f double(5,0) YES NULL select,insert,update,references
h float(3,2) YES NULL select,insert,update,references
i float(3,0) YES NULL select,insert,update,references
drop table t1;
create table t1 (c decimal, d double, f float, r real);
show columns from t1;

View File

@ -0,0 +1,185 @@
select (select 2);
(select 2)
2
SELECT (SELECT 1) UNION SELECT (SELECT 2);
(SELECT 1)
1
2
drop table if exists t1,t2,t3,t4,t5,attend,clinic,inscrit;
create table t1 (a int);
create table t2 (a int, b int);
create table t3 (a int);
create table t4 (a int, b int);
insert into t1 values (2);
insert into t2 values (1,7),(2,7);
insert into t4 values (4,8),(3,8),(5,9);
select (select a from t1 where t1.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a) a
NULL 1
2 2
select (select a from t1 where t1.a=t2.b), a from t2;
(select a from t1 where t1.a=t2.b) a
NULL 1
NULL 2
select (select a from t1), a from t2;
(select a from t1) a
2 1
2 2
select (select a from t3), a from t2;
(select a from t3) a
NULL 1
NULL 2
select * from t2 where t2.a=(select a from t1);
a b
2 7
insert into t3 values (6),(7),(3);
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1);
a b
1 7
2 7
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 order by a limit 2) limit 3;
a b
1 7
2 7
3 8
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
a b
1 7
2 7
3 8
4 8
explain select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 where used
3 UNION t4 ALL NULL NULL NULL NULL 3 where used; Using filesort
4 SUBSELECT t2 ALL NULL NULL NULL NULL 2
2 SUBSELECT t3 ALL NULL NULL NULL NULL 3 Using filesort
select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
(select a from t3 where a<t2.a*4 order by 1 desc limit 1) a
3 1
7 2
select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
(select t3.a from t3 where a<8 order by 1 desc limit 1) a
7 2
explain select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
id select_type table type possible_keys key key_len ref rows Extra
3 DERIVED t2 ALL NULL NULL NULL NULL 2 where used
1 PRIMARY <derived3> system NULL NULL NULL NULL 1
2 SUBSELECT t3 ALL NULL NULL NULL NULL 3 where used; Using filesort
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
a
2
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a > t1.a) order by 1 desc limit 1);
a
2
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1);
a
select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
b (select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2)
8 7.5000
8 4.5000
9 7.5000
explain select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t4 ALL NULL NULL NULL NULL 3
2 DEPENDENT SUBSELECT t2 ALL NULL NULL NULL NULL 2
3 DEPENDENT SUBSELECT t3 ALL NULL NULL NULL NULL 3 where used
select * from t3 where exists (select * from t2 where t2.b=t3.a);
a
7
select * from t3 where not exists (select * from t2 where t2.b=t3.a);
a
6
3
insert into t4 values (12,7),(1,7),(10,9),(9,6),(7,6),(3,9);
select b,max(a) as ma from t4 group by b having b < (select max(t2.a)
from t2 where t2.b=t4.b);
b ma
select b,max(a) as ma from t4 group by b having b >= (select max(t2.a)
from t2 where t2.b=t4.b);
b ma
7 12
create table t5 (a int);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) a
NULL 1
2 2
insert into t5 values (5);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) a
NULL 1
2 2
insert into t5 values (2);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a) a
NULL 1
2 2
explain select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBSELECT t1 system NULL NULL NULL NULL 1 where used
3 DEPENDENT UNION t5 ALL NULL NULL NULL NULL 2 where used
select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
Subselect returns more than 1 record
create table attend (patient_uq int, clinic_uq int, index i1 (clinic_uq));
create table clinic( uq int primary key, name char(25));
insert into clinic values(1,"Oblastnaia bolnitsa"),(2,"Bolnitsa Krasnogo Kresta");
insert into attend values (1,1),(1,2),(2,2),(1,3);
select * from attend where exists (select * from clinic where uq = clinic_uq);
patient_uq clinic_uq
1 1
1 2
2 2
select * from t1 where a= (select a from t2,t4 where t2.b=t4.b);
Column: 'a' in field list is ambiguous
drop table if exists t1,t2,t3;
CREATE TABLE t3 (a varchar(20),b char(1) NOT NULL default '0');
INSERT INTO t3 VALUES ('W','a'),('A','c'),('J','b');
CREATE TABLE t2 (a varchar(20),b int NOT NULL default '0');
INSERT INTO t2 VALUES ('W','1'),('A','3'),('J','2');
CREATE TABLE t1 (a varchar(20),b date NOT NULL default '0000-00-00');
INSERT INTO t1 VALUES ('W','1732-02-22'),('A','1735-10-30'),('J','1743-04-13');
SELECT * FROM t1 WHERE b = (SELECT MIN(b) FROM t1);
a b
W 1732-02-22
SELECT * FROM t2 WHERE b = (SELECT MIN(b) FROM t2);
a b
W 1
SELECT * FROM t3 WHERE b = (SELECT MIN(b) FROM t3);
a b
W a
drop table if exists inscrit;
CREATE TABLE `inscrit` (
`pseudo` varchar(35) character set latin1 NOT NULL default '',
`email` varchar(60) character set latin1 NOT NULL default '',
PRIMARY KEY (`pseudo`),
UNIQUE KEY `email` (`email`)
) TYPE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
INSERT INTO inscrit (pseudo,email) VALUES ('joce','test');
INSERT INTO inscrit (pseudo,email) VALUES ('joce1','test1');
INSERT INTO inscrit (pseudo,email) VALUES ('2joce1','2test1');
EXPLAIN SELECT pseudo,(SELECT email FROM inscrit WHERE pseudo=(SELECT
pseudo FROM inscrit WHERE pseudo='joce')) FROM inscrit WHERE pseudo=(SELECT
pseudo FROM inscrit WHERE pseudo='joce');
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY inscrit const PRIMARY PRIMARY 35 const 1
4 SUBSELECT inscrit const PRIMARY PRIMARY 35 const 1
2 SUBSELECT inscrit const PRIMARY PRIMARY 35 const 1
3 SUBSELECT inscrit const PRIMARY PRIMARY 35 const 1
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo,email FROM
inscrit WHERE pseudo='joce');
Subselect returns more than 1 field
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT * FROM inscrit WHERE
pseudo='joce');
Subselect returns more than 1 field
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo FROM inscrit WHERE pseudo='joce');
pseudo
joce
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo FROM inscrit WHERE pseudo LIKE '%joce%');
Subselect returns more than 1 record
drop table if exists t1,t2,t3,t4,t5,attend,clinic,inscrit;

View File

@ -36,10 +36,10 @@ show create table t9;
Table Create Table
t9 CREATE TABLE `t9` (
`a` int(11) NOT NULL auto_increment,
`b` char(16) NOT NULL default '',
`b` char(16) character set latin1 NOT NULL default '',
`c` int(11) NOT NULL default '0',
PRIMARY KEY (`a`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
alter table t9 rename t8, add column d int not null;
alter table t8 rename t7;
rename table t7 to t9;
@ -57,9 +57,9 @@ show create table test_mysqltest.t9;
Table Create Table
t9 CREATE TABLE `t9` (
`a` int(11) NOT NULL auto_increment,
`b` char(16) NOT NULL default '',
`b` char(16) character set latin1 NOT NULL default '',
`c` int(11) NOT NULL default '0',
`d` int(11) NOT NULL default '0',
PRIMARY KEY (`a`)
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop database test_mysqltest;

View File

@ -37,18 +37,18 @@ insert into t1 values (NULL,NULL,NULL,NULL);
update t1 set c="",b=null where c="1";
lock tables t1 READ;
show full fields from t1;
Field Type Null Key Default Extra Privileges
t text YES NULL select,insert,update,references
c varchar(10) YES NULL select,insert,update,references
b blob YES NULL select,insert,update,references
d varchar(10) binary YES NULL select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
t text character set latin1 YES NULL select,insert,update,references
c varchar(10) character set latin1 YES NULL select,insert,update,references
b blob YES NULL select,insert,update,references
d varchar(10) binary YES NULL select,insert,update,references
lock tables t1 WRITE;
show full fields from t1;
Field Type Null Key Default Extra Privileges
t text YES NULL select,insert,update,references
c varchar(10) YES NULL select,insert,update,references
b blob YES NULL select,insert,update,references
d varchar(10) binary YES NULL select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
t text character set latin1 YES NULL select,insert,update,references
c varchar(10) character set latin1 YES NULL select,insert,update,references
b blob YES NULL select,insert,update,references
d varchar(10) binary YES NULL select,insert,update,references
unlock tables;
select t from t1 where t like "hello";
t

View File

@ -75,6 +75,6 @@ date numfacture expedition
0000-00-00 00:00:00 0 0001-00-00 00:00:00
0000-00-00 00:00:00 1212 0001-00-00 00:00:00
EXPLAIN SELECT * FROM t1 WHERE expedition='0001-00-00 00:00:00';
table type possible_keys key key_len ref rows Extra
t1 ref expedition expedition 8 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref expedition expedition 8 const 1 where used
drop table t1;

View File

@ -1627,12 +1627,12 @@ show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` enum('','a','b') NOT NULL default ''
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;
create table t1 (a enum (' ','a','b ') not null default 'b ');
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` enum('','a','b') NOT NULL default 'b'
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;

View File

@ -10,9 +10,9 @@ SELECT 1e1,1.e1,1.0e1,1e+1,1.e+1,1.0e+1,1e-1,1.e-1,1.0e-1;
drop table if exists t1;
create table t1 (f1 float(24),f2 float(52));
show full columns from t1;
Field Type Null Key Default Extra Privileges
f1 float YES NULL select,insert,update,references
f2 double YES NULL select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
f1 float YES NULL select,insert,update,references
f2 double YES NULL select,insert,update,references
insert into t1 values(10,10),(1e+5,1e+5),(1234567890,1234567890),(1e+10,1e+10),(1e+15,1e+15),(1e+20,1e+20),(1e+50,1e+50),(1e+150,1e+150);
insert into t1 values(-10,-10),(1e-5,1e-5),(1e-10,1e-10),(1e-15,1e-15),(1e-20,1e-20),(1e-50,1e-50),(1e-150,1e-150);
select * from t1;
@ -69,19 +69,19 @@ min(a)
drop table t1;
create table t1 (f float, f2 float(24), f3 float(6,2), d double, d2 float(53), d3 double(10,3), de decimal, de2 decimal(6), de3 decimal(5,2), n numeric, n2 numeric(8), n3 numeric(5,6));
show full columns from t1;
Field Type Null Key Default Extra Privileges
f float YES NULL select,insert,update,references
f2 float YES NULL select,insert,update,references
f3 float(6,2) YES NULL select,insert,update,references
d double YES NULL select,insert,update,references
d2 double YES NULL select,insert,update,references
d3 double(10,3) YES NULL select,insert,update,references
de decimal(10,0) YES NULL select,insert,update,references
de2 decimal(6,0) YES NULL select,insert,update,references
de3 decimal(5,2) YES NULL select,insert,update,references
n decimal(10,0) YES NULL select,insert,update,references
n2 decimal(8,0) YES NULL select,insert,update,references
n3 decimal(7,6) YES NULL select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
f float YES NULL select,insert,update,references
f2 float YES NULL select,insert,update,references
f3 float(6,2) YES NULL select,insert,update,references
d double YES NULL select,insert,update,references
d2 double YES NULL select,insert,update,references
d3 double(10,3) YES NULL select,insert,update,references
de decimal(10,0) YES NULL select,insert,update,references
de2 decimal(6,0) YES NULL select,insert,update,references
de3 decimal(5,2) YES NULL select,insert,update,references
n decimal(10,0) YES NULL select,insert,update,references
n2 decimal(8,0) YES NULL select,insert,update,references
n3 decimal(7,6) YES NULL select,insert,update,references
drop table t1;
create table t1 (a decimal(7,3) not null, key (a));
insert into t1 values ("0"),("-0.00"),("-0.01"),("-0.002"),("1");

View File

@ -38,31 +38,31 @@ KEY (ulonglong,ulong),
KEY (options,flags)
);
show full fields from t1;
Field Type Null Key Default Extra Privileges
auto int(5) unsigned PRI NULL auto_increment select,insert,update,references
string varchar(10) YES hello select,insert,update,references
tiny tinyint(4) MUL 0 select,insert,update,references
short smallint(6) MUL 1 select,insert,update,references
medium mediumint(8) MUL 0 select,insert,update,references
long_int int(11) 0 select,insert,update,references
longlong bigint(13) MUL 0 select,insert,update,references
real_float float(13,1) MUL 0.0 select,insert,update,references
real_double double(16,4) YES NULL select,insert,update,references
utiny tinyint(3) unsigned MUL 0 select,insert,update,references
ushort smallint(5) unsigned zerofill MUL 00000 select,insert,update,references
umedium mediumint(8) unsigned MUL 0 select,insert,update,references
ulong int(11) unsigned MUL 0 select,insert,update,references
ulonglong bigint(13) unsigned MUL 0 select,insert,update,references
time_stamp timestamp(14) YES NULL select,insert,update,references
date_field date YES NULL select,insert,update,references
time_field time YES NULL select,insert,update,references
date_time datetime YES NULL select,insert,update,references
blob_col blob YES NULL select,insert,update,references
tinyblob_col tinyblob YES NULL select,insert,update,references
mediumblob_col mediumblob select,insert,update,references
longblob_col longblob select,insert,update,references
options enum('one','two','tree') MUL one select,insert,update,references
flags set('one','two','tree') select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
auto int(5) unsigned PRI NULL auto_increment select,insert,update,references
string varchar(10) character set latin1 YES hello select,insert,update,references
tiny tinyint(4) MUL 0 select,insert,update,references
short smallint(6) MUL 1 select,insert,update,references
medium mediumint(8) MUL 0 select,insert,update,references
long_int int(11) 0 select,insert,update,references
longlong bigint(13) MUL 0 select,insert,update,references
real_float float(13,1) MUL 0.0 select,insert,update,references
real_double double(16,4) YES NULL select,insert,update,references
utiny tinyint(3) unsigned MUL 0 select,insert,update,references
ushort smallint(5) unsigned zerofill MUL 00000 select,insert,update,references
umedium mediumint(8) unsigned MUL 0 select,insert,update,references
ulong int(11) unsigned MUL 0 select,insert,update,references
ulonglong bigint(13) unsigned MUL 0 select,insert,update,references
time_stamp timestamp(14) YES NULL select,insert,update,references
date_field date YES NULL select,insert,update,references
time_field time YES NULL select,insert,update,references
date_time datetime YES NULL select,insert,update,references
blob_col blob YES NULL select,insert,update,references
tinyblob_col tinyblob YES NULL select,insert,update,references
mediumblob_col mediumblob select,insert,update,references
longblob_col longblob select,insert,update,references
options enum('one','two','tree') MUL one select,insert,update,references
flags set('one','two','tree') select,insert,update,references
show keys from t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
t1 0 PRIMARY 1 auto A 0 NULL NULL BTREE
@ -168,57 +168,57 @@ drop table t2;
create table t2 select * from t1;
update t2 set string="changed" where auto=16;
show full columns from t1;
Field Type Null Key Default Extra Privileges
auto int(5) unsigned MUL NULL auto_increment select,insert,update,references
string varchar(10) YES new defaul select,insert,update,references
tiny tinyint(4) MUL 0 select,insert,update,references
short smallint(6) MUL 0 select,insert,update,references
medium mediumint(8) MUL 0 select,insert,update,references
long_int int(11) 0 select,insert,update,references
longlong bigint(13) MUL 0 select,insert,update,references
real_float float(13,1) MUL 0.0 select,insert,update,references
real_double double(16,4) YES NULL select,insert,update,references
utiny tinyint(3) unsigned 0 select,insert,update,references
ushort smallint(5) unsigned zerofill 00000 select,insert,update,references
umedium mediumint(8) unsigned MUL 0 select,insert,update,references
ulong int(11) unsigned MUL 0 select,insert,update,references
ulonglong bigint(13) unsigned MUL 0 select,insert,update,references
time_stamp timestamp(14) YES NULL select,insert,update,references
date_field varchar(10) YES NULL select,insert,update,references
time_field time YES NULL select,insert,update,references
date_time datetime YES NULL select,insert,update,references
new_blob_col varchar(20) YES NULL select,insert,update,references
tinyblob_col tinyblob YES NULL select,insert,update,references
mediumblob_col mediumblob select,insert,update,references
options enum('one','two','tree') MUL one select,insert,update,references
flags set('one','two','tree') select,insert,update,references
new_field varchar(10) new select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
auto int(5) unsigned MUL NULL auto_increment select,insert,update,references
string varchar(10) character set latin1 YES new defaul select,insert,update,references
tiny tinyint(4) MUL 0 select,insert,update,references
short smallint(6) MUL 0 select,insert,update,references
medium mediumint(8) MUL 0 select,insert,update,references
long_int int(11) 0 select,insert,update,references
longlong bigint(13) MUL 0 select,insert,update,references
real_float float(13,1) MUL 0.0 select,insert,update,references
real_double double(16,4) YES NULL select,insert,update,references
utiny tinyint(3) unsigned 0 select,insert,update,references
ushort smallint(5) unsigned zerofill 00000 select,insert,update,references
umedium mediumint(8) unsigned MUL 0 select,insert,update,references
ulong int(11) unsigned MUL 0 select,insert,update,references
ulonglong bigint(13) unsigned MUL 0 select,insert,update,references
time_stamp timestamp(14) YES NULL select,insert,update,references
date_field varchar(10) character set latin1 YES NULL select,insert,update,references
time_field time YES NULL select,insert,update,references
date_time datetime YES NULL select,insert,update,references
new_blob_col varchar(20) character set latin1 YES NULL select,insert,update,references
tinyblob_col tinyblob YES NULL select,insert,update,references
mediumblob_col mediumblob select,insert,update,references
options enum('one','two','tree') MUL one select,insert,update,references
flags set('one','two','tree') select,insert,update,references
new_field varchar(10) character set latin1 new select,insert,update,references
show full columns from t2;
Field Type Null Key Default Extra Privileges
auto int(5) unsigned 0 select,insert,update,references
string varchar(10) YES new defaul select,insert,update,references
tiny tinyint(4) 0 select,insert,update,references
short smallint(6) 0 select,insert,update,references
medium mediumint(8) 0 select,insert,update,references
long_int int(11) 0 select,insert,update,references
longlong bigint(13) 0 select,insert,update,references
real_float float(13,1) 0.0 select,insert,update,references
real_double double(16,4) YES NULL select,insert,update,references
utiny tinyint(3) unsigned 0 select,insert,update,references
ushort smallint(5) unsigned zerofill 00000 select,insert,update,references
umedium mediumint(8) unsigned 0 select,insert,update,references
ulong int(11) unsigned 0 select,insert,update,references
ulonglong bigint(13) unsigned 0 select,insert,update,references
time_stamp timestamp(14) YES NULL select,insert,update,references
date_field varchar(10) YES NULL select,insert,update,references
time_field time YES NULL select,insert,update,references
date_time datetime YES NULL select,insert,update,references
new_blob_col varchar(20) YES NULL select,insert,update,references
tinyblob_col tinyblob YES NULL select,insert,update,references
mediumblob_col mediumblob select,insert,update,references
options enum('one','two','tree') one select,insert,update,references
flags set('one','two','tree') select,insert,update,references
new_field varchar(10) new select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
auto int(5) unsigned 0 select,insert,update,references
string varchar(10) character set latin1 YES new defaul select,insert,update,references
tiny tinyint(4) 0 select,insert,update,references
short smallint(6) 0 select,insert,update,references
medium mediumint(8) 0 select,insert,update,references
long_int int(11) 0 select,insert,update,references
longlong bigint(13) 0 select,insert,update,references
real_float float(13,1) 0.0 select,insert,update,references
real_double double(16,4) YES NULL select,insert,update,references
utiny tinyint(3) unsigned 0 select,insert,update,references
ushort smallint(5) unsigned zerofill 00000 select,insert,update,references
umedium mediumint(8) unsigned 0 select,insert,update,references
ulong int(11) unsigned 0 select,insert,update,references
ulonglong bigint(13) unsigned 0 select,insert,update,references
time_stamp timestamp(14) YES NULL select,insert,update,references
date_field varchar(10) character set latin1 YES NULL select,insert,update,references
time_field time YES NULL select,insert,update,references
date_time datetime YES NULL select,insert,update,references
new_blob_col varchar(20) character set latin1 YES NULL select,insert,update,references
tinyblob_col tinyblob YES NULL select,insert,update,references
mediumblob_col mediumblob select,insert,update,references
options enum('one','two','tree') one select,insert,update,references
flags set('one','two','tree') select,insert,update,references
new_field varchar(10) character set latin1 new select,insert,update,references
select t1.auto,t2.auto from t1,t2 where t1.auto=t2.auto and ((t1.string<>t2.string and (t1.string is not null or t2.string is not null)) or (t1.tiny<>t2.tiny and (t1.tiny is not null or t2.tiny is not null)) or (t1.short<>t2.short and (t1.short is not null or t2.short is not null)) or (t1.medium<>t2.medium and (t1.medium is not null or t2.medium is not null)) or (t1.long_int<>t2.long_int and (t1.long_int is not null or t2.long_int is not null)) or (t1.longlong<>t2.longlong and (t1.longlong is not null or t2.longlong is not null)) or (t1.real_float<>t2.real_float and (t1.real_float is not null or t2.real_float is not null)) or (t1.real_double<>t2.real_double and (t1.real_double is not null or t2.real_double is not null)) or (t1.utiny<>t2.utiny and (t1.utiny is not null or t2.utiny is not null)) or (t1.ushort<>t2.ushort and (t1.ushort is not null or t2.ushort is not null)) or (t1.umedium<>t2.umedium and (t1.umedium is not null or t2.umedium is not null)) or (t1.ulong<>t2.ulong and (t1.ulong is not null or t2.ulong is not null)) or (t1.ulonglong<>t2.ulonglong and (t1.ulonglong is not null or t2.ulonglong is not null)) or (t1.time_stamp<>t2.time_stamp and (t1.time_stamp is not null or t2.time_stamp is not null)) or (t1.date_field<>t2.date_field and (t1.date_field is not null or t2.date_field is not null)) or (t1.time_field<>t2.time_field and (t1.time_field is not null or t2.time_field is not null)) or (t1.date_time<>t2.date_time and (t1.date_time is not null or t2.date_time is not null)) or (t1.new_blob_col<>t2.new_blob_col and (t1.new_blob_col is not null or t2.new_blob_col is not null)) or (t1.tinyblob_col<>t2.tinyblob_col and (t1.tinyblob_col is not null or t2.tinyblob_col is not null)) or (t1.mediumblob_col<>t2.mediumblob_col and (t1.mediumblob_col is not null or t2.mediumblob_col is not null)) or (t1.options<>t2.options and (t1.options is not null or t2.options is not null)) or (t1.flags<>t2.flags and (t1.flags is not null or t2.flags is not null)) or (t1.new_field<>t2.new_field and (t1.new_field is not null or t2.new_field is not null)));
auto auto
16 16
@ -228,12 +228,12 @@ auto auto
drop table t2;
create table t2 (primary key (auto)) select auto+1 as auto,1 as t1, "a" as t2, repeat("a",256) as t3, binary repeat("b",256) as t4 from t1;
show full columns from t2;
Field Type Null Key Default Extra Privileges
auto bigint(17) unsigned PRI 0 select,insert,update,references
t1 bigint(1) 0 select,insert,update,references
t2 char(1) select,insert,update,references
t3 mediumtext select,insert,update,references
t4 mediumblob select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
auto bigint(17) unsigned PRI 0 select,insert,update,references
t1 bigint(1) 0 select,insert,update,references
t2 char(1) character set latin1 select,insert,update,references
t3 mediumtext character set latin1 select,insert,update,references
t4 mediumblob select,insert,update,references
select * from t2;
auto t1 t2 t3 t4
11 1 a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
@ -251,10 +251,10 @@ create table t3 select * from t1, t2;
Duplicate column name 'c'
create table t3 select t1.c AS c1, t2.c AS c2,1 as "const" from t1, t2;
show full columns from t3;
Field Type Null Key Default Extra Privileges
c1 int(11) YES NULL select,insert,update,references
c2 int(11) YES NULL select,insert,update,references
const bigint(1) 0 select,insert,update,references
Field Type Null Key Default Extra Privileges Comment
c1 int(11) YES NULL select,insert,update,references
c2 int(11) YES NULL select,insert,update,references
const bigint(1) 0 select,insert,update,references
drop table t1,t2,t3;
create table t1 ( myfield INT NOT NULL, UNIQUE INDEX (myfield), unique (myfield), index(myfield));
drop table t1;

View File

@ -4,12 +4,12 @@ show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` set('','a','b') NOT NULL default ''
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;
create table t1 (a set (' ','a','b ') not null default 'b ');
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` set('','a','b') NOT NULL default 'b'
) TYPE=MyISAM
) TYPE=MyISAM CHARSET=latin1
drop table t1;

View File

@ -85,36 +85,31 @@ a b
2 b
1 a
explain (select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
t2 ALL NULL NULL NULL NULL 4 Using filesort
t1 ALL NULL NULL NULL NULL 4
(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
a b
1 a
2 b
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
2 UNION t2 ALL NULL NULL NULL NULL 4 Using filesort
select found_rows();
FOUND_ROWS()
6
0
explain select a,b from t1 union all select a,b from t2;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
t2 ALL NULL NULL NULL NULL 4
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
2 UNION t2 ALL NULL NULL NULL NULL 4
explain select xx from t1 union select 1;
Unknown column 'xx' in 'field list'
explain select a,b from t1 union select 1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
0 0 No tables used
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
2 UNION No tables used
explain select 1 union select a,b from t1 union select 1;
table type possible_keys key key_len ref rows Extra
0 0 No tables used
t1 ALL NULL NULL NULL NULL 4
0 0 No tables used
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY No tables used
2 UNION t1 ALL NULL NULL NULL NULL 4
3 UNION No tables used
explain select a,b from t1 union select 1 limit 0;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
0 0 Impossible WHERE
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY Impossible WHERE
2 UNION Impossible WHERE
select a,b from t1 into outfile 'skr' union select a,b from t2;
Wrong usage of UNION and INTO
select a,b from t1 order by a union select a,b from t2;

View File

@ -18,15 +18,15 @@ i @vv1:=if(sv1.i,1,0) @vv2:=if(sv2.i,1,0) @vv3:=if(sv3.i,1,0) @vv1+@vv2+@vv3
1 1 0 1 2
2 1 0 0 1
explain select * from t1 where i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 ref i i 4 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i i 4 const 1 where used
explain select * from t1 where @vv1:=@vv1+1 and i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 3 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 where used
explain select @vv1:=i from t1 where i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 index NULL i 4 NULL 3 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL i 4 NULL 3 where used; Using index
explain select * from t1 where i=@vv1;
table type possible_keys key key_len ref rows Extra
t1 ref i i 4 const 1 where used
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i i 4 const 1 where used
drop table t1,t2;

View File

@ -12,8 +12,8 @@ create table t1 (ID int(8) unsigned zerofill not null auto_increment,UNIQ bigint
insert into t1 set UNIQ=0x38afba1d73e6a18a;
insert into t1 set UNIQ=123;
explain select * from t1 where UNIQ=0x38afba1d73e6a18a;
table type possible_keys key key_len ref rows Extra
t1 const UNIQ UNIQ 8 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const UNIQ UNIQ 8 const 1
drop table t1;
select x'hello';
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 'x'hello'' at line 1

View File

View File

@ -22,12 +22,12 @@ drop table if exists t1;
!$1146 create table t2 select auto+1 from t1;
drop table if exists t1,t2;
!$1167 create table t1 (b char(0) not null, index(b));
!$1164 create table t1 (a int not null auto_increment,primary key (a)) type=heap;
create table t1 (a int not null auto_increment,primary key (a)) type=heap;
!$1163 create table t1 (a int not null,b text) type=heap;
!$1171 create table t1 (a int ,primary key(a)) type=heap;
drop table if exists t1;
!$1164 create table t1 (ordid int(8) not null auto_increment, ord varchar(50) not null, primary key (ord,ordid)) type=heap;
!$1075 create table t1 (ordid int(8) not null auto_increment, ord varchar(50) not null, primary key (ord,ordid)) type=heap;
!$1171 create table t1 (ordid int(8), primary key (ordid));
-- error 1044,1
@ -82,6 +82,22 @@ create table t2 select CAST("2001-12-29" AS DATE) as d, CAST("20:45:11" AS TIME)
describe t2;
drop table t1,t2;
#
# Test of CREATE ... SELECT with duplicate fields
#
create table t1 (a tinyint);
create table t2 (a int) select * from t1;
describe t1;
describe t2;
drop table if exists t2;
!$1060 create table t2 (a int, a float) select * from t1;
drop table if exists t2;
!$1060 create table t2 (a int) select a as b, a+1 as b from t1;
drop table if exists t2;
!$1060 create table t2 (b int) select a as b, a+1 as b from t1;
drop table if exists t1,t2;
#
# Test of primary key with 32 index
#

View File

@ -0,0 +1,191 @@
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (
comment CHAR(32) CHARACTER SET latin1 NOT NULL,
koi8_ru_f CHAR(32) CHARACTER SET koi8_ru NOT NULL
) CHARSET=latin5;
SHOW CREATE TABLE t1;
ALTER TABLE t1 CHANGE comment comment CHAR(32) CHARACTER SET latin2 NOT NULL;
SHOW CREATE TABLE t1;
ALTER TABLE t1 ADD latin5_f CHAR(32) NOT NULL;
SHOW CREATE TABLE t1;
ALTER TABLE t1 CHARSET=latin2;
ALTER TABLE t1 ADD latin2_f CHAR(32) NOT NULL;
SHOW CREATE TABLE t1;
ALTER TABLE t1 DROP latin2_f, DROP latin5_f;
SHOW CREATE TABLE t1;
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('a','LAT SMALL A');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('b','LAT SMALL B');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('c','LAT SMALL C');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('d','LAT SMALL D');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('e','LAT SMALL E');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('f','LAT SMALL F');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('g','LAT SMALL G');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('h','LAT SMALL H');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('i','LAT SMALL I');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('j','LAT SMALL J');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('k','LAT SMALL K');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('l','LAT SMALL L');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('m','LAT SMALL M');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('n','LAT SMALL N');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('o','LAT SMALL O');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('p','LAT SMALL P');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('q','LAT SMALL Q');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('r','LAT SMALL R');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('s','LAT SMALL S');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('t','LAT SMALL T');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('u','LAT SMALL U');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('v','LAT SMALL V');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('w','LAT SMALL W');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('x','LAT SMALL X');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('y','LAT SMALL Y');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('z','LAT SMALL Z');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('A','LAT CAPIT A');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('B','LAT CAPIT B');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('C','LAT CAPIT C');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('D','LAT CAPIT D');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('E','LAT CAPIT E');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('F','LAT CAPIT F');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('G','LAT CAPIT G');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('H','LAT CAPIT H');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('I','LAT CAPIT I');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('J','LAT CAPIT J');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('K','LAT CAPIT K');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('L','LAT CAPIT L');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('M','LAT CAPIT M');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('N','LAT CAPIT N');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('O','LAT CAPIT O');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('P','LAT CAPIT P');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('Q','LAT CAPIT Q');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('R','LAT CAPIT R');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('S','LAT CAPIT S');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('T','LAT CAPIT T');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('U','LAT CAPIT U');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('V','LAT CAPIT V');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('W','LAT CAPIT W');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('X','LAT CAPIT X');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('Y','LAT CAPIT Y');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('Z','LAT CAPIT Z');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL A');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL BE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL VE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL GE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL DE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL IE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL IO');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL ZHE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL ZE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL I');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL KA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL EL');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL EM');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL EN');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL O');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL PE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL ER');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL ES');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL TE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL U');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL EF');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL HA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL TSE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL CHE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL SHA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL SCHA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL HARD SIGN');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL YERU');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL SOFT SIGN');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL E');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL YU');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR SMALL YA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT A');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT BE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT VE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT GE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT DE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT IE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT IO');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT ZHE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT ZE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT I');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT KA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT EL');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT EM');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT EN');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT O');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT PE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT ER');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT ES');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT TE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT U');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT EF');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT HA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT TSE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT CHE');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT SHA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT SCHA');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT HARD SIGN');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT YERU');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT SOFT SIGN');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT E');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT YU');
INSERT INTO t1 (koi8_ru_f,comment) VALUES ('<27>','CYR CAPIT YA');
SELECT CONVERT(koi8_ru_f USING utf8),MIN(comment),COUNT(*) FROM t1 GROUP BY 1;
ALTER TABLE t1 ADD utf8_f CHAR(32) CHARACTER SET utf8 NOT NULL;
UPDATE t1 SET utf8_f=CONVERT(koi8_ru_f USING utf8);
SELECT * FROM t1;
SELECT koi8_ru_f,MIN(comment) FROM t1 GROUP BY 1;
SELECT utf8_f,MIN(comment) FROM t1 GROUP BY 1;
SELECT DISTINCT koi8_ru_f FROM t1;
SELECT DISTINCT utf8_f FROM t1;
SELECT lower(koi8_ru_f) FROM t1 ORDER BY 1 DESC;
SELECT lower(utf8_f) FROM t1 ORDER BY 1 DESC;
SELECT t11.comment,t12.comment
FROM t1 t11,t1 t12 WHERE CONVERT(t11.koi8_ru_f USING utf8)=t12.utf8_f
ORDER BY t11.koi8_ru_f,t11.comment,t12.comment;
SELECT t11.comment,t12.comment
FROM t1 t11,t1 t12
WHERE t11.koi8_ru_f=CONVERT(t12.utf8_f USING koi8_ru)
ORDER BY t12.utf8_f,t11.comment,t12.comment;
ALTER TABLE t1 ADD ucs2_f CHAR(32) CHARACTER SET ucs2 NOT NULL;
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0391,'GREEK CAPIT ALPHA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0392,'GREEK CAPIT BETA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0393,'GREEK CAPIT GAMMA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0394,'GREEK CAPIT DELTA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0395,'GREEK CAPIT EPSILON');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x03B1,'GREEK SMALL ALPHA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x03B2,'GREEK SMALL BETA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x03B3,'GREEK SMALL GAMMA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x03B4,'GREEK SMALL DELTA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x03B5,'GREEK SMALL EPSILON');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0531,'ARMENIAN CAPIT AYB');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0532,'ARMENIAN CAPIT BEN');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0533,'ARMENIAN CAPIT GIM');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0534,'ARMENIAN CAPIT DA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0535,'ARMENIAN CAPIT ECH');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0536,'ARMENIAN CAPIT ZA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0561,'ARMENIAN SMALL YAB');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0562,'ARMENIAN SMALL BEN');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0563,'ARMENIAN SMALL GIM');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0564,'ARMENIAN SMALL DA');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0565,'ARMENIAN SMALL ECH');
INSERT INTO t1 (ucs2_f,comment) VALUES (0x0566,'ARMENIAN SMALL ZA');
ALTER TABLE t1 ADD armscii8_f CHAR(32) CHARACTER SET armscii8 NOT NULL;
ALTER TABLE t1 ADD greek_f CHAR(32) CHARACTER SET greek NOT NULL;
UPDATE t1 SET greek_f=CONVERT(ucs2_f USING greek) WHERE comment LIKE 'GRE%';
UPDATE t1 SET armscii8_f=CONVERT(ucs2_f USING armscii8) WHERE comment LIKE 'ARM%';
UPDATE t1 SET utf8_f=CONVERT(ucs2_f USING utf8) WHERE utf8_f='';
UPDATE t1 SET ucs2_f=CONVERT(utf8_f USING ucs2) WHERE ucs2_f='';
SELECT min(comment),count(*) FROM t1 GROUP BY ucs2_f;
DROP TABLE t1;

11
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@ -0,0 +1,11 @@
drop table if exists t1,t2,t3;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
select t1.a,t3.y from t1,(select a as y from t2 where b='c') as t3 where t1.a = t3.y;
select t1.a,t3.a from t1,(select * from t2 where b='c') as t3 where t1.a = t3.a;
CREATE TABLE t3 (a int not null, b char (10) not null);
insert into t3 values (3,'f'),(4,'y'),(5,'z'),(6,'c');
select t1.a,t4.y from t1,(select t2.a as y from t2,(select t3.b from t3 where t3.a>3) as t5 where t2.b=t5.b) as t4 where t1.a = t4.y;
drop table if exists t1.t2,t3;

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@ -42,7 +42,7 @@ alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
drop table t1;
create table t1 (x int not null, y int not null, key x(x), unique y(y))
create table t1 (x int not null, y int not null, key x (x), unique y (y))
type=heap;
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
select * from t1 where x=1;

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@ -0,0 +1,30 @@
#
# Test of auto_increment; The test for BDB tables is in bdb.test
#
drop table if exists t1;
create table t1 (a int not null auto_increment,b int, primary key (a)) type=heap auto_increment=3;
insert into t1 values (1,1),(NULL,3),(NULL,4);
delete from t1 where a=4;
insert into t1 values (NULL,5),(NULL,6);
select * from t1;
delete from t1 where a=6;
#show table status like "t1";
replace t1 values (3,1);
ALTER TABLE t1 add c int;
replace t1 values (3,3,3);
insert into t1 values (NULL,7,7);
update t1 set a=8,b=b+1,c=c+1 where a=7;
insert into t1 values (NULL,9,9);
select * from t1;
drop table t1;
create table t1 (
skey tinyint unsigned NOT NULL auto_increment PRIMARY KEY,
sval char(20)
) type=heap;
insert into t1 values (NULL, "hello");
insert into t1 values (NULL, "hey");
select * from t1;
select _rowid,t1._rowid,skey,sval from t1;
drop table t1;

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@ -0,0 +1,147 @@
#
# Test of heap tables.
#
drop table if exists t1;
create table t1 (a int not null,b int not null, primary key using BTREE (a)) type=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a=1 or a=0;
#show table status like "t1";
show keys from t1;
select * from t1;
select * from t1 where a=4;
update t1 set b=5 where a=4;
update t1 set b=b+1 where a>=3;
replace t1 values (3,3);
select * from t1;
alter table t1 add c int not null, add key using BTREE (c,a);
drop table t1;
create table t1 (a int not null,b int not null, primary key using BTREE (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a > 0;
select * from t1;
drop table t1;
create table t1 (a int not null,b int not null, primary key using BTREE (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
alter table t1 modify a int not null auto_increment, type=myisam, comment="new myisam table";
#show table status like "t1";
select * from t1;
drop table t1;
create table t1 (a int not null) type=heap;
insert into t1 values (869751),(736494),(226312),(802616);
select * from t1 where a > 736494;
alter table t1 add unique uniq_id using BTREE (a);
select * from t1 where a > 736494;
select * from t1 where a = 736494;
select * from t1 where a=869751 or a=736494;
select * from t1 where a in (869751,736494,226312,802616);
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
drop table t1;
create table t1 (x int not null, y int not null, key x using BTREE (x), unique y using BTREE (y))
type=heap;
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
select * from t1 where x=1;
select * from t1,t1 as t2 where t1.x=t2.y;
explain select * from t1,t1 as t2 where t1.x=t2.y;
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
select max(a) from t1;
drop table t1;
CREATE TABLE t1 ( a int not null default 0, b int not null default 0, key using BTREE (a,b), key using BTREE (b) ) TYPE=HEAP;
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
--replace_result 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x 12 x 13 x 14 x
explain select * from t1 where a=1 order by a,b;
--replace_result 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x 12 x 13 x 14 x
explain select * from t1 where a=1 order by b;
select * from t1 where b=1;
--replace_result 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x 12 x 13 x 14 x
explain select * from t1 where b=1;
drop table t1;
create table t1 (id int unsigned not null, primary key using BTREE (id)) type=HEAP;
insert into t1 values(1);
select max(id) from t1;
insert into t1 values(2);
select max(id) from t1;
replace into t1 values(1);
drop table t1;
create table t1 (n int) type=heap;
drop table t1;
create table t1 (n int) type=heap;
drop table if exists t1;
# Test of non unique index
CREATE table t1(f1 int not null,f2 char(20) not
null,index(f2)) type=heap;
INSERT into t1 set f1=12,f2="bill";
INSERT into t1 set f1=13,f2="bill";
INSERT into t1 set f1=14,f2="bill";
INSERT into t1 set f1=15,f2="bill";
INSERT into t1 set f1=16,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
delete from t1 where f2="bill";
select * from t1;
drop table t1;
#
# Test when using part key searches
#
create table t1 (btn char(10) not null, key using BTREE (btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
select * from t1 where btn like "q%";
alter table t1 add column new_col char(1) not null, add key using BTREE (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
explain select * from t1 where btn="a" and new_col="a";
drop table t1;
#
# Test of NULL keys
#
CREATE TABLE t1 (
a int default NULL,
b int default NULL,
KEY a using BTREE (a),
UNIQUE b using BTREE (b)
) type=heap;
INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
explain SELECT * FROM t1 WHERE a IS NULL;
SELECT * FROM t1 WHERE a<=>NULL;
SELECT * FROM t1 WHERE b=NULL;
explain SELECT * FROM t1 WHERE b IS NULL;
SELECT * FROM t1 WHERE b<=>NULL;
--error 1062
INSERT INTO t1 VALUES (1,3);
DROP TABLE t1;
#
# Test when deleting all rows
#
CREATE TABLE t1 (a int not null, primary key using BTREE (a)) type=heap;
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
DELETE from t1 where a < 100;
SELECT * from t1;
DROP TABLE t1;

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#
# Test of heap tables.
#
drop table if exists t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) type=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a=1 or a=0;
#show table status like "t1";
show keys from t1;
select * from t1;
select * from t1 where a=4;
update t1 set b=5 where a=4;
update t1 set b=b+1 where a>=3;
replace t1 values (3,3);
select * from t1;
alter table t1 add c int not null, add key using HASH (c,a);
drop table t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a > 0;
select * from t1;
drop table t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) type=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
alter table t1 modify a int not null auto_increment, type=myisam, comment="new myisam table";
#show table status like "t1";
select * from t1;
drop table t1;
create table t1 (a int not null) type=heap;
insert into t1 values (869751),(736494),(226312),(802616);
select * from t1 where a > 736494;
alter table t1 add unique uniq_id using HASH (a);
select * from t1 where a > 736494;
select * from t1 where a = 736494;
select * from t1 where a=869751 or a=736494;
select * from t1 where a in (869751,736494,226312,802616);
alter table t1 type=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
drop table t1;
create table t1 (x int not null, y int not null, key x using HASH (x), unique y using HASH (y))
type=heap;
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
select * from t1 where x=1;
select * from t1,t1 as t2 where t1.x=t2.y;
explain select * from t1,t1 as t2 where t1.x=t2.y;
drop table t1;
create table t1 (a int) type=heap;
insert into t1 values(1);
select max(a) from t1;
drop table t1;
CREATE TABLE t1 ( a int not null default 0, b int not null default 0, key using HASH (a), key using HASH (b) ) TYPE=HEAP;
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
drop table t1;
create table t1 (id int unsigned not null, primary key using HASH (id)) type=HEAP;
insert into t1 values(1);
select max(id) from t1;
insert into t1 values(2);
select max(id) from t1;
replace into t1 values(1);
drop table t1;
create table t1 (n int) type=heap;
drop table t1;
create table t1 (n int) type=heap;
drop table if exists t1;
# Test of non unique index
CREATE table t1(f1 int not null,f2 char(20) not
null,index(f2)) type=heap;
INSERT into t1 set f1=12,f2="bill";
INSERT into t1 set f1=13,f2="bill";
INSERT into t1 set f1=14,f2="bill";
INSERT into t1 set f1=15,f2="bill";
INSERT into t1 set f1=16,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
delete from t1 where f2="bill";
select * from t1;
drop table t1;
#
# Test when using part key searches
#
create table t1 (btn char(10) not null, key using HASH (btn)) type=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
select * from t1 where btn like "q%";
alter table t1 add column new_col char(1) not null, add key using HASH (btn,new_col), drop key btn;
update t1 set new_col=btn;
explain select * from t1 where btn="a";
explain select * from t1 where btn="a" and new_col="a";
drop table t1;
#
# Test of NULL keys
#
CREATE TABLE t1 (
a int default NULL,
b int default NULL,
KEY a using HASH (a),
UNIQUE b using HASH (b)
) type=heap;
INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
explain SELECT * FROM t1 WHERE a IS NULL;
SELECT * FROM t1 WHERE a<=>NULL;
SELECT * FROM t1 WHERE b=NULL;
explain SELECT * FROM t1 WHERE b IS NULL;
SELECT * FROM t1 WHERE b<=>NULL;
--error 1062
INSERT INTO t1 VALUES (1,3);
DROP TABLE t1;
#
# Test when deleting all rows
#
CREATE TABLE t1 (a int not null, primary key using HASH (a)) type=heap;
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
DELETE from t1 where a < 100;
SELECT * from t1;
DROP TABLE t1;

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@ -5,7 +5,7 @@
drop table if exists t1;
CREATE TABLE t1 (
STRING_DATA char(255) default NULL,
KEY STRING_DATA (STRING_DATA)
KEY string_data (STRING_DATA)
) TYPE=MyISAM;
INSERT INTO t1 VALUES ('AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA');

View File

@ -8,7 +8,12 @@ create table t1 (n int not null primary key) type=myisam;
begin work;
insert into t1 values (4);
insert into t1 values (5);
# Should give an error
!$1196 rollback;
rollback;
select @@warning_count;
select @@error_count;
show warnings;
show errors;
select * from t1;
select @@warning_count;
show warnings;
drop table t1;

View File

@ -23,6 +23,7 @@ change master to master_log_pos=173;
--replace_result 3306 MASTER_PORT 9306 MASTER_PORT 3334 MASTER_PORT 3336 MASTER_PORT
slave start;
sleep 2;
--replace_result 3306 MASTER_PORT 9306 MASTER_PORT 3334 MASTER_PORT 3336 MASTER_PORT
show slave status;
connection master;
show master status;

View File

@ -49,9 +49,11 @@ drop table t2;
create table t1 (
test_set set( 'val1', 'val2', 'val3' ) not null default '',
name char(20) default 'O''Brien'
name char(20) default 'O''Brien' comment 'O''Brien as default',
c int not null comment 'int column'
) comment = 'it\'s a table' ;
show create table t1 ;
show full columns from t1;
drop table t1;
create table t1 (a int not null, unique aa (a));
@ -78,6 +80,7 @@ drop table t1;
create table t1 (a decimal(9,2), b decimal (9,0), e double(9,2), f double(5,0), h float(3,2), i float(3,0));
show columns from t1;
show full columns from t1;
drop table t1;
# Check auto conversions of types

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@ -0,0 +1,99 @@
select (select 2);
SELECT (SELECT 1) UNION SELECT (SELECT 2);
drop table if exists t1,t2,t3,t4,t5,attend,clinic,inscrit;
create table t1 (a int);
create table t2 (a int, b int);
create table t3 (a int);
create table t4 (a int, b int);
insert into t1 values (2);
insert into t2 values (1,7),(2,7);
insert into t4 values (4,8),(3,8),(5,9);
select (select a from t1 where t1.a=t2.a), a from t2;
select (select a from t1 where t1.a=t2.b), a from t2;
select (select a from t1), a from t2;
select (select a from t3), a from t2;
select * from t2 where t2.a=(select a from t1);
insert into t3 values (6),(7),(3);
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1);
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 order by a limit 2) limit 3;
select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
explain select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
explain select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from
(select * from t2 where a>1) as tt;
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a > t1.a) order by 1 desc limit 1);
select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1);
select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
explain select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
select * from t3 where exists (select * from t2 where t2.b=t3.a);
select * from t3 where not exists (select * from t2 where t2.b=t3.a);
insert into t4 values (12,7),(1,7),(10,9),(9,6),(7,6),(3,9);
select b,max(a) as ma from t4 group by b having b < (select max(t2.a)
from t2 where t2.b=t4.b);
select b,max(a) as ma from t4 group by b having b >= (select max(t2.a)
from t2 where t2.b=t4.b);
create table t5 (a int);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
insert into t5 values (5);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
insert into t5 values (2);
select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
explain select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
-- error 1240
select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
create table attend (patient_uq int, clinic_uq int, index i1 (clinic_uq));
create table clinic( uq int primary key, name char(25));
insert into clinic values(1,"Oblastnaia bolnitsa"),(2,"Bolnitsa Krasnogo Kresta");
insert into attend values (1,1),(1,2),(2,2),(1,3);
select * from attend where exists (select * from clinic where uq = clinic_uq);
# not unique fields
-- error 1052
select * from t1 where a= (select a from t2,t4 where t2.b=t4.b);
# different tipes & group functions
drop table if exists t1,t2,t3;
CREATE TABLE t3 (a varchar(20),b char(1) NOT NULL default '0');
INSERT INTO t3 VALUES ('W','a'),('A','c'),('J','b');
CREATE TABLE t2 (a varchar(20),b int NOT NULL default '0');
INSERT INTO t2 VALUES ('W','1'),('A','3'),('J','2');
CREATE TABLE t1 (a varchar(20),b date NOT NULL default '0000-00-00');
INSERT INTO t1 VALUES ('W','1732-02-22'),('A','1735-10-30'),('J','1743-04-13');
SELECT * FROM t1 WHERE b = (SELECT MIN(b) FROM t1);
SELECT * FROM t2 WHERE b = (SELECT MIN(b) FROM t2);
SELECT * FROM t3 WHERE b = (SELECT MIN(b) FROM t3);
drop table if exists inscrit;
CREATE TABLE `inscrit` (
`pseudo` varchar(35) character set latin1 NOT NULL default '',
`email` varchar(60) character set latin1 NOT NULL default '',
PRIMARY KEY (`pseudo`),
UNIQUE KEY `email` (`email`)
) TYPE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;
INSERT INTO inscrit (pseudo,email) VALUES ('joce','test');
INSERT INTO inscrit (pseudo,email) VALUES ('joce1','test1');
INSERT INTO inscrit (pseudo,email) VALUES ('2joce1','2test1');
EXPLAIN SELECT pseudo,(SELECT email FROM inscrit WHERE pseudo=(SELECT
pseudo FROM inscrit WHERE pseudo='joce')) FROM inscrit WHERE pseudo=(SELECT
pseudo FROM inscrit WHERE pseudo='joce');
-- error 1239
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo,email FROM
inscrit WHERE pseudo='joce');
-- error 1239
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT * FROM inscrit WHERE
pseudo='joce');
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo FROM inscrit WHERE pseudo='joce');
-- error 1240
SELECT pseudo FROM inscrit WHERE pseudo=(SELECT pseudo FROM inscrit WHERE pseudo LIKE '%joce%');
drop table if exists t1,t2,t3,t4,t5,attend,clinic,inscrit;

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@ -21,7 +21,7 @@ select 't1',b,count(*) from t1 group by b UNION select 't2',b,count(*) from t2 g
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1);
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
explain (select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
#(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
select found_rows();
#