connect disable_purge,localhost,root,,;
# Disable the purge of InnoDB history, to make the test run faster.
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default; SET DEFAULT_STORAGE_ENGINE = InnoDB; set @optimizer_switch_save= @@optimizer_switch; set optimizer_switch='index_merge_sort_intersection=off'; set optimizer_switch='rowid_filter=off'; SET @save_stats_persistent=@@GLOBAL.innodb_stats_persistent; SET GLOBAL innodb_stats_persistent=0;
#---------------- Index merge test 2 -------------------------------------------
create table t1
(
key1 int not null,
key2 int not null,
INDEX i1(key1),
INDEX i2(key2)
);
INSERT INTO t1 SELECT seq,200-seq FROM seq_0_to_200;
explain select * from t1 where key1 < 5or key2 > 197;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
select * from t1 where key1 < 5or key2 > 197;
key1 key2 0200 1199 2198 3197 4196
explain select * from t1 where key1 < 3or key2 > 195;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
select * from t1 where key1 < 3or key2 > 195;
key1 key2 0200 1199 2198 3197 4196
alter table t1 add str1 char (255) not null,
add zeroval int not null default 0,
add str2 char (255) not null,
add str3 char (255) not null;
update t1 set str1='aaa', str2='bbb', str3=concat(key2, '-', key1 div 2, '_' ,if(key1 mod 2 = 0, 'a', 'A'));
alter table t1 add primary key (str1, zeroval, str2, str3);
explain select * from t1 where key1 < 5or key2 > 197;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
select * from t1 where key1 < 5or key2 > 197;
key1 key2 str1 zeroval str2 str3 4196 aaa 0 bbb 196-2_a 3197 aaa 0 bbb 197-1_A 2198 aaa 0 bbb 198-1_a 1199 aaa 0 bbb 199-0_A 0200 aaa 0 bbb 200-0_a
explain select * from t1 where key1 < 3or key2 > 195;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
select * from t1 where key1 < 3or key2 > 195;
key1 key2 str1 zeroval str2 str3 4196 aaa 0 bbb 196-2_a 3197 aaa 0 bbb 197-1_A 2198 aaa 0 bbb 198-1_a 1199 aaa 0 bbb 199-0_A 0200 aaa 0 bbb 200-0_a
drop table t1;
create table t1 (
pk integer not null auto_increment primary key,
key1 integer,
key2 integer not null,
filler char (200),
index (key1),
index (key2)
);
show warnings;
Level Code Message
INSERT INTO t1 (key1, key2, filler)
SELECT seq/4, seq/8, 'filler-data' FROM seq_30_to_0;
explain select pk from t1 where key1 = 1and key2 = 1;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge key1,key2 key1,key2 5,4 NULL 1 Using intersect(key1,key2); Using where; Using index
select pk from t1 where key2 = 1and key1 = 1;
pk 26 27
select pk from t1 ignore index(key1,key2) where key2 = 1and key1 = 1;
pk 26 27
drop table t1;
create table t1 (
pk int primary key auto_increment,
key1a int,
key2a int,
key1b int,
key2b int,
dummy1 int,
dummy2 int,
dummy3 int,
dummy4 int,
key3a int,
key3b int,
filler1 char (200),
index i1(key1a, key1b),
index i2(key2a, key2b),
index i3(key3a, key3b)
);
create table t2 (a int);
insert into t2 values (0),(1),(2),(3),(4),(NULL);
insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b)
select A.a, B.a, C.a, D.a, C.a, D.a from t2 A,t2 B,t2 C, t2 D;
insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b)
select key1a, key1b, key2a, key2b, key3a, key3b from t1;
insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b)
select key1a, key1b, key2a, key2b, key3a, key3b from t1;
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
select count(*) from t1;
count(*) 5184
explain select count(*) from t1 where
key1a = 2and key1b is null and key2a = 2and key2b is null;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge i1,i2 i1,i2 10,10 NULL REF Using intersect(i1,i2); Using where; Using index
select count(*) from t1 where
key1a = 2and key1b is null and key2a = 2and key2b is null;
count(*) 4
explain select count(*) from t1 where
key1a = 2and key1b is null and key3a = 2and key3b is null;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge i1,i3 i1,i3 10,10 NULL REF Using intersect(i1,i3); Using where; Using index
select count(*) from t1 where
key1a = 2and key1b is null and key3a = 2and key3b is null;
count(*) 4
drop table t1,t2;
create table t1 (
id1 int,
id2 date ,
index idx2 (id1,id2),
index idx1 (id2)
);
insert into t1 values(1,'20040101'), (2,'20040102');
select * from t1 where id1 = 1and id2= '20040101';
id1 id2 12004-01-01
drop table t1;
drop view if exists v1;
CREATE TABLE t1 (
`oid` int(11) unsigned NOT NULL auto_increment,
`fk_bbk_niederlassung` int(11) unsigned NOT NULL,
`fk_wochentag` int(11) unsigned NOT NULL,
`uhrzeit_von` time NOT NULL COMMENT 'HH:MM',
`uhrzeit_bis` time NOT NULL COMMENT 'HH:MM',
`geloescht` tinyint(4) NOT NULL,
`version` int(5) NOT NULL,
PRIMARY KEY (`oid`),
KEY `fk_bbk_niederlassung` (`fk_bbk_niederlassung`),
KEY `fk_wochentag` (`fk_wochentag`),
KEY `ix_version` (`version`)
) DEFAULT CHARSET=latin1;
insert into t1 values
(1, 38, 1, '08:00:00', '13:00:00', 0, 1),
(2, 38, 2, '08:00:00', '13:00:00', 0, 1),
(3, 38, 3, '08:00:00', '13:00:00', 0, 1),
(4, 38, 4, '08:00:00', '13:00:00', 0, 1),
(5, 38, 5, '08:00:00', '13:00:00', 0, 1),
(6, 38, 5, '08:00:00', '13:00:00', 1, 2),
(7, 38, 3, '08:00:00', '13:00:00', 1, 2),
(8, 38, 1, '08:00:00', '13:00:00', 1, 2),
(9, 38, 2, '08:00:00', '13:00:00', 1, 2),
(10, 38, 4, '08:00:00', '13:00:00', 1, 2),
(11, 38, 1, '08:00:00', '13:00:00', 0, 3),
(12, 38, 2, '08:00:00', '13:00:00', 0, 3),
(13, 38, 3, '08:00:00', '13:00:00', 0, 3),
(14, 38, 4, '08:00:00', '13:00:00', 0, 3),
(15, 38, 5, '08:00:00', '13:00:00', 0, 3),
(16, 38, 4, '08:00:00', '13:00:00', 0, 4),
(17, 38, 5, '08:00:00', '13:00:00', 0, 4),
(18, 38, 1, '08:00:00', '13:00:00', 0, 4),
(19, 38, 2, '08:00:00', '13:00:00', 0, 4),
(20, 38, 3, '08:00:00', '13:00:00', 0, 4),
(21, 7, 1, '08:00:00', '13:00:00', 0, 1),
(22, 7, 2, '08:00:00', '13:00:00', 0, 1),
(23, 7, 3, '08:00:00', '13:00:00', 0, 1),
(24, 7, 4, '08:00:00', '13:00:00', 0, 1),
(25, 7, 5, '08:00:00', '13:00:00', 0, 1);
create view v1 as
select
zeit1.oid AS oid,
zeit1.fk_bbk_niederlassung AS fk_bbk_niederlassung,
zeit1.fk_wochentag AS fk_wochentag,
zeit1.uhrzeit_von AS uhrzeit_von,
zeit1.uhrzeit_bis AS uhrzeit_bis,
zeit1.geloescht AS geloescht,
zeit1.version AS version
from
t1 zeit1
where
(zeit1.version =
(select max(zeit2.version) AS `max(version)`
from t1 zeit2
where
((zeit1.fk_bbk_niederlassung = zeit2.fk_bbk_niederlassung) and
(zeit1.fk_wochentag = zeit2.fk_wochentag) and
(zeit1.uhrzeit_von = zeit2.uhrzeit_von) and
(zeit1.uhrzeit_bis = zeit2.uhrzeit_bis)
)
)
) and (zeit1.geloescht = 0);
select * from v1 where oid = 21;
oid fk_bbk_niederlassung fk_wochentag uhrzeit_von uhrzeit_bis geloescht version 217108:00:0013:00:0001
drop view v1;
drop table t1;
CREATE TABLE t1(
t_cpac varchar(2) NOT NULL,
t_vers varchar(4) NOT NULL,
t_rele varchar(2) NOT NULL,
t_cust varchar(4) NOT NULL,
filler1 char(250) default NULL,
filler2 char(250) default NULL,
PRIMARY KEY (t_cpac,t_vers,t_rele,t_cust),
UNIQUE KEY IX_4 (t_cust,t_cpac,t_vers,t_rele),
KEY IX_5 (t_vers,t_rele,t_cust)
);
insert into t1 values
('tm','2.5 ','a ',' ','',''), ('tm','2.5U','a ','stnd','',''),
('da','3.3 ','b ',' ','',''), ('da','3.3U','b ','stnd','',''),
('tl','7.6 ','a ',' ','',''), ('tt','7.6 ','a ',' ','',''),
('bc','B61 ','a ',' ','',''), ('bp','B61 ','a ',' ','',''),
('ca','B61 ','a ',' ','',''), ('ci','B61 ','a ',' ','',''),
('cp','B61 ','a ',' ','',''), ('dm','B61 ','a ',' ','',''),
('ec','B61 ','a ',' ','',''), ('ed','B61 ','a ',' ','',''),
('fm','B61 ','a ',' ','',''), ('nt','B61 ','a ',' ','',''),
('qm','B61 ','a ',' ','',''), ('tc','B61 ','a ',' ','',''),
('td','B61 ','a ',' ','',''), ('tf','B61 ','a ',' ','',''),
('tg','B61 ','a ',' ','',''), ('ti','B61 ','a ',' ','',''),
('tp','B61 ','a ',' ','',''), ('ts','B61 ','a ',' ','',''),
('wh','B61 ','a ',' ','',''), ('bc','B61U','a ','stnd','',''),
('bp','B61U','a ','stnd','',''), ('ca','B61U','a ','stnd','',''),
('ci','B61U','a ','stnd','',''), ('cp','B61U','a ','stnd','',''),
('dm','B61U','a ','stnd','',''), ('ec','B61U','a ','stnd','',''),
('fm','B61U','a ','stnd','',''), ('nt','B61U','a ','stnd','',''),
('qm','B61U','a ','stnd','',''), ('tc','B61U','a ','stnd','',''),
('td','B61U','a ','stnd','',''), ('tf','B61U','a ','stnd','',''),
('tg','B61U','a ','stnd','',''), ('ti','B61U','a ','stnd','',''),
('tp','B61U','a ','stnd','',''), ('ts','B61U','a ','stnd','',''),
('wh','B61U','a ','stnd','','');
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`t_cpac` varchar(2) NOT NULL,
`t_vers` varchar(4) NOT NULL,
`t_rele` varchar(2) NOT NULL,
`t_cust` varchar(4) NOT NULL,
`filler1` char(250) DEFAULT NULL,
`filler2` char(250) DEFAULT NULL,
PRIMARY KEY (`t_cpac`,`t_vers`,`t_rele`,`t_cust`),
UNIQUE KEY `IX_4` (`t_cust`,`t_cpac`,`t_vers`,`t_rele`),
KEY `IX_5` (`t_vers`,`t_rele`,`t_cust`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
select t_vers,t_rele,t_cust,filler1 from t1 where t_vers = '7.6';
t_vers t_rele t_cust filler1 7.6 a 7.6 a
select t_vers,t_rele,t_cust,filler1 from t1 where t_vers = '7.6' and t_rele='a'and t_cust = ' ';
t_vers t_rele t_cust filler1 7.6 a 7.6 a
drop table t1;
create table t1 (
pk int(11) not null auto_increment,
a int(11) not null default '0',
b int(11) not null default '0',
c int(11) not null default '0',
filler1 datetime, filler2 varchar(15),
filler3 longtext,
kp1 varchar(4), kp2 varchar(7),
kp3 varchar(2), kp4 varchar(4),
kp5 varchar(7),
filler4 char(1),
primary key (pk),
key idx1(a,b,c),
key idx2(c),
key idx3(kp1,kp2,kp3,kp4,kp5)
) default charset=latin1; set @fill=NULL;
SELECT COUNT(*) FROM t1 WHERE b = 0AND a = 0AND c = 13286427AND
kp1='279'AND kp2='ELM0678'AND kp3='6'AND kp4='10'AND kp5 = 'R ';
COUNT(*) 1
drop table t1;
create table t1
(
key1 int not null,
key2 int not null default 0,
key3 int not null default 0
);
insert into t1(key1) select seq from seq_1_to_1024;
alter table t1 add index i2(key2);
alter table t1 add index i3(key3);
update t1 set key2=key1,key3=key1;
insert into t1 select 10000+key1, 10000+key2,10000+key3 from t1;
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
explain select * from t1 where (key3 > 30and key3<35) or (key2 >32and key2 < 40);
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge i2,i3 i3,i2 4,4 NULL REF Using sort_union(i3,i2); Using where
select * from t1 where (key3 > 30and key3<35) or (key2 >32and key2 < 40);
key1 key2 key3 313131 323232 333333 343434 353535 363636 373737 383838 393939
drop table t1;
#
# Bug#56423: Different count with SELECT and CREATE SELECT queries
#
CREATE TABLE t1 (
a INT,
b INT,
c INT,
d INT,
PRIMARY KEY (a),
KEY (c),
KEY bd (b,d)
);
INSERT INTO t1 VALUES
(1, 0, 1, 0),
(2, 1, 1, 1),
(3, 1, 1, 1),
(4, 0, 1, 1);
EXPLAIN
SELECT a
FROM t1
WHERE c = 1AND b = 1AND d = 1;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref c,bd bd 10 const,const 2 Using where
CREATE TABLE t2 ( a INT )
SELECT a
FROM t1
WHERE c = 1AND b = 1AND d = 1;
SELECT * FROM t2;
a 2 3
DROP TABLE t1, t2;
CREATE TABLE t1( a INT, b INT, KEY(a), KEY(b) );
INSERT INTO t1 VALUES (1, 2), (1, 2), (1, 2), (1, 2);
SELECT * FROM t1 FORCE INDEX(a, b) WHERE a = 1AND b = 2;
a b 12 12 12 12
DROP TABLE t1;
# Code coverage of fix.
CREATE TABLE t1 ( a INT NOT NULL AUTO_INCREMENT PRIMARY KEY, b INT);
INSERT INTO t1 (b) VALUES (1);
UPDATE t1 SET b = 2 WHERE a = 1;
SELECT * FROM t1;
a b 12
CREATE TABLE t2 ( a INT NOT NULL AUTO_INCREMENT PRIMARY KEY, b VARCHAR(1) );
INSERT INTO t2 (b) VALUES ('a');
UPDATE t2 SET b = 'b' WHERE a = 1;
SELECT * FROM t2;
a b 1 b
DROP TABLE t1, t2;
#---------------- 2-sweeps read Index merge test 2 -------------------------------
create table t1 (
pk int primary key,
key1 int,
key2 int,
filler char(200),
filler2 char(200),
index(key1),
index(key2)
);
insert into t1 select seq, seq, seq, 'filler-data', 'filler-data-2'
from seq_1000_to_1;
select * from t1 where (key1 >= 2and key1 <= 10) or (pk >= 4and pk <=8 );
pk key1 key2 filler filler2 222 filler-data filler-data-2 333 filler-data filler-data-2 999 filler-data filler-data-2 101010 filler-data filler-data-2 444 filler-data filler-data-2 555 filler-data filler-data-2 666 filler-data filler-data-2 777 filler-data filler-data-2 888 filler-data filler-data-2 set @maxv=1000;
select * from t1 where
(pk < 5) or (pk > 10and pk < 15) or (pk >= 50and pk < 55 ) or (pk > @maxv-10) or key1=18or key1=60;
pk key1 key2 filler filler2 181818 filler-data filler-data-2 606060 filler-data filler-data-2 111 filler-data filler-data-2 222 filler-data filler-data-2 333 filler-data filler-data-2 444 filler-data filler-data-2 111111 filler-data filler-data-2 121212 filler-data filler-data-2 131313 filler-data filler-data-2 141414 filler-data filler-data-2 505050 filler-data filler-data-2 515151 filler-data filler-data-2 525252 filler-data filler-data-2 535353 filler-data filler-data-2 545454 filler-data filler-data-2 991991991 filler-data filler-data-2 992992992 filler-data filler-data-2 993993993 filler-data filler-data-2 994994994 filler-data filler-data-2 995995995 filler-data filler-data-2 996996996 filler-data filler-data-2 997997997 filler-data filler-data-2 998998998 filler-data filler-data-2 999999999 filler-data filler-data-2 100010001000 filler-data filler-data-2
select * from t1 where
(pk < 5) or (pk > 10and pk < 15) or (pk >= 50and pk < 55 ) or (pk > @maxv-10) or key1 < 3or key1 > @maxv-11;
pk key1 key2 filler filler2 990990990 filler-data filler-data-2 111 filler-data filler-data-2 222 filler-data filler-data-2 333 filler-data filler-data-2 444 filler-data filler-data-2 111111 filler-data filler-data-2 121212 filler-data filler-data-2 131313 filler-data filler-data-2 141414 filler-data filler-data-2 505050 filler-data filler-data-2 515151 filler-data filler-data-2 525252 filler-data filler-data-2 535353 filler-data filler-data-2 545454 filler-data filler-data-2 991991991 filler-data filler-data-2 992992992 filler-data filler-data-2 993993993 filler-data filler-data-2 994994994 filler-data filler-data-2 995995995 filler-data filler-data-2 996996996 filler-data filler-data-2 997997997 filler-data filler-data-2 998998998 filler-data filler-data-2 999999999 filler-data filler-data-2 100010001000 filler-data filler-data-2
select * from t1 where
(pk < 5) or (pk > 10and pk < 15) or (pk >= 50and pk < 55 ) or (pk > @maxv-10) or
(key1 < 5) or (key1 > 10and key1 < 15) or (key1 >= 50and key1 < 55 ) or (key1 > @maxv-10);
pk key1 key2 filler filler2 111 filler-data filler-data-2 222 filler-data filler-data-2 333 filler-data filler-data-2 444 filler-data filler-data-2 111111 filler-data filler-data-2 121212 filler-data filler-data-2 131313 filler-data filler-data-2 141414 filler-data filler-data-2 505050 filler-data filler-data-2 515151 filler-data filler-data-2 525252 filler-data filler-data-2 535353 filler-data filler-data-2 545454 filler-data filler-data-2 991991991 filler-data filler-data-2 992992992 filler-data filler-data-2 993993993 filler-data filler-data-2 994994994 filler-data filler-data-2 995995995 filler-data filler-data-2 996996996 filler-data filler-data-2 997997997 filler-data filler-data-2 998998998 filler-data filler-data-2 999999999 filler-data filler-data-2 100010001000 filler-data filler-data-2
select * from t1 where
(pk > 10and pk < 15) or (pk >= 50and pk < 55 ) or
(key1 < 5) or (key1 > @maxv-10);
pk key1 key2 filler filler2 111 filler-data filler-data-2 222 filler-data filler-data-2 333 filler-data filler-data-2 444 filler-data filler-data-2 991991991 filler-data filler-data-2 992992992 filler-data filler-data-2 993993993 filler-data filler-data-2 994994994 filler-data filler-data-2 995995995 filler-data filler-data-2 996996996 filler-data filler-data-2 997997997 filler-data filler-data-2 998998998 filler-data filler-data-2 999999999 filler-data filler-data-2 100010001000 filler-data filler-data-2 111111 filler-data filler-data-2 121212 filler-data filler-data-2 131313 filler-data filler-data-2 141414 filler-data filler-data-2 505050 filler-data filler-data-2 515151 filler-data filler-data-2 525252 filler-data filler-data-2 535353 filler-data filler-data-2 545454 filler-data filler-data-2
drop table t1;
#---------------- Clustered PK ROR-index_merge tests -----------------------------
create table t1
(
pk1 int not null,
pk2 int not null,
key1 int not null,
key2 int not null,
pktail1ok int not null,
pktail2ok int not null,
pktail3bad int not null,
pktail4bad int not null,
pktail5bad int not null,
pk2copy int not null,
badkey int not null,
filler1 char (200),
filler2 char (200),
key (key1),
key (key2), /* keys with tails from CPK members */
key (pktail1ok, pk1),
key (pktail2ok, pk1, pk2),
key (pktail3bad, pk2, pk1),
key (pktail4bad, pk1, pk2copy),
key (pktail5bad, pk1, pk2, pk2copy),
primary key (pk1, pk2)
);
explain select * from t1 where pk1 = 1and pk2 < 80and key1=0;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range PRIMARY,key1 PRIMARY 8 NULL 10 Using where
select * from t1 where pk1 = 1and pk2 < 80and key1=0;
pk1 pk2 key1 key2 pktail1ok pktail2ok pktail3bad pktail4bad pktail5bad pk2copy badkey filler1 filler2 1100000000100 filler-data-10 filler2 1110000000110 filler-data-11 filler2 1120000000120 filler-data-12 filler2 1130000000130 filler-data-13 filler2 1140000000140 filler-data-14 filler2 1150000000150 filler-data-15 filler2 1160000000160 filler-data-16 filler2 1170000000170 filler-data-17 filler2 1180000000180 filler-data-18 filler2 1190000000190 filler-data-19 filler2
explain select pk1,pk2 from t1 where key1 = 10and key2=10and2*pk1+1 < 2*96+1;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where; Using index
select pk1,pk2 from t1 where key1 = 10and key2=10and2*pk1+1 < 2*96+1;
pk1 pk2 9550 9551 9552 9553 9554 9555 9556 9557 9558 9559
explain select * from t1 where badkey=1and key1=10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref key1 key1 4 const 100 Using where set @tmp_index_merge_ror_cpk=@@optimizer_switch; set optimizer_switch='extended_keys=off';
explain select * from t1 where pk1 < 7500and key1 = 10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref PRIMARY,key1 key1 4 const ROWS Using index condition set optimizer_switch=@tmp_index_merge_ror_cpk;
explain select * from t1 where pktail1ok=1and key1=10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge key1,pktail1ok key1,pktail1ok 4,4 NULL 1 Using intersect(key1,pktail1ok); Using where
explain select * from t1 where pktail2ok=1and key1=10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge key1,pktail2ok key1,pktail2ok 4,4 NULL 1 Using intersect(key1,pktail2ok); Using where
explain select * from t1 where (pktail2ok=1and pk1< 50000) or key1=10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge PRIMARY,key1,pktail2ok pktail2ok,key1 8,4 NULL 200 Using sort_union(pktail2ok,key1); Using where
explain select * from t1 where pktail3bad=1and key1=10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref key1,pktail3bad key1 4 const 100 Using where
explain select * from t1 where pktail4bad=1and key1=10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref key1,pktail4bad key1 4 const 100 Using where
explain select * from t1 where pktail5bad=1and key1=10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref key1,pktail5bad key1 4 const 100 Using where
explain select pk1,pk2,key1,key2 from t1 where key1 = 10and key2=10 limit 10;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where; Using index
select pk1,pk2,key1,key2 from t1 where key1 = 10and key2=10 limit 10;
pk1 pk2 key1 key2 95501010 95511010 95521010 95531010 95541010 95551010 95561010 95571010 95581010 95591010
drop table t1;
create table t1
(
RUNID varchar(22),
SUBMITNR varchar(5),
ORDERNR char(1),
PROGRAMM varchar(8),
TESTID varchar(4),
UCCHECK char(1),
ETEXT varchar(80),
ETEXT_TYPE char(1),
INFO char(1),
SEVERITY tinyint(3),
TADIRFLAG char(1),
PRIMARY KEY (RUNID,SUBMITNR,ORDERNR,PROGRAMM,TESTID,UCCHECK),
KEY `TVERM~KEY` (PROGRAMM,TESTID,UCCHECK)
) DEFAULT CHARSET=latin1;
update t1 set `ETEXT` = '', `ETEXT_TYPE`='', `INFO`='', `SEVERITY`='', `TADIRFLAG`=''
WHERE
`RUNID`= ''AND `SUBMITNR`= ''AND `ORDERNR`=''AND `PROGRAMM`=''AND
`TESTID`=''AND `UCCHECK`='';
drop table t1;
#
# Bug#50402 Optimizer producing wrong results when using Index Merge on InnoDB
#
CREATE TABLE t1 (f1 INT, PRIMARY KEY (f1)) CHARSET=latin1;
INSERT INTO t1 VALUES (2);
CREATE TABLE t2 (f1 INT, f2 INT, f3 char(1),
PRIMARY KEY (f1), KEY (f2), KEY (f3)) CHARSET=latin1;
INSERT INTO t2 VALUES (1, 1, 'h'), (2, 3, 'h'), (3, 2, ''), (4, 2, '');
SELECT t1.f1 FROM t1
WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h'AND t2.f2 = t1.f1) = 0AND t1.f1 = 2;
f1 2
EXPLAIN SELECT t1.f1 FROM t1
WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h'AND t2.f2 = t1.f1) = 0AND t1.f1 = 2;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 const PRIMARY PRIMARY 4 const 1 2 SUBQUERY t2 index_merge f2,f3 f3,f2 2,5 NULL 1 Using intersect(f3,f2); Using where; Using index
DROP TABLE t1,t2;
#
# BUG#56862/640419: Wrong result with sort_union index merge when one
# of the merged index scans is the primary key scan
#
CREATE TABLE t0(a int, b int) ENGINE=MyISAM;
CREATE TABLE t1 (
pk int NOT NULL AUTO_INCREMENT PRIMARY KEY,
a int,
b int,
INDEX idx(a))
ENGINE=INNODB;
INSERT INTO t0(a,b) VALUES
(11, 1100), (2, 200), (1, 100), (14, 1400), (5, 500),
(3, 300), (17, 1700), (4, 400), (12, 1200), (8, 800),
(6, 600), (18, 1800), (9, 900), (10, 1000), (7, 700),
(13, 1300), (15, 1500), (19, 1900), (16, 1600), (20, 2000);
INSERT INTO t0(a,b) SELECT a+20, b+2000 FROM t0;
INSERT INTO t0(a,b) SELECT a+40, b+4000 FROM t0;
INSERT INTO t0(a,b) SELECT a+80, b+8000 FROM t0;
begin;
INSERT INTO t1(a,b) SELECT t0.a,t0.b FROM t0, seq_1_to_1024;
INSERT INTO t1 VALUES (1000000, 0, 0);
commit;
DROP TABLE t0; SET SESSION sort_buffer_size = 1024*36; set @tmp_optimizer_switch=@@optimizer_switch; set optimizer_switch='derived_merge=off,derived_with_keys=off';
EXPLAIN
SELECT COUNT(*) FROM
(SELECT * FROM t1 FORCE INDEX(primary,idx)
WHERE a BETWEEN 2AND7OR pk=1000000) AS t;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL # 2 DERIVED t1 index_merge PRIMARY,idx idx,PRIMARY 5,4 NULL # Using sort_union(idx,PRIMARY); Using where
SELECT COUNT(*) FROM
(SELECT * FROM t1 FORCE INDEX(primary,idx)
WHERE a BETWEEN 2AND7OR pk=1000000) AS t;
COUNT(*) 6145
EXPLAIN
SELECT COUNT(*) FROM
(SELECT * FROM t1 IGNORE INDEX(idx)
WHERE a BETWEEN 2AND7OR pk=1000000) AS t;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL # 2 DERIVED t1 ALL PRIMARY NULL NULL NULL # Using where
SELECT COUNT(*) FROM
(SELECT * FROM t1 IGNORE INDEX(idx)
WHERE a BETWEEN 2AND7OR pk=1000000) AS t;
COUNT(*) 6145
DROP TABLE t1; set optimizer_switch=@tmp_optimizer_switch;
#
# Testcase Backport: BUG#48093: 6.0 Server not processing equivalent IN clauses properly
# with Innodb tables
#
CREATE TABLE t1 (
i int(11) DEFAULT NULL,
v1 varchar(1) DEFAULT NULL,
v2 varchar(20) DEFAULT NULL,
KEY i (i),
KEY v (v1,i)
) ENGINE=innodb;
INSERT INTO t1 VALUES (1,'f','no');
INSERT INTO t1 VALUES (2,'u','yes-u');
INSERT INTO t1 VALUES (2,'h','yes-h');
INSERT INTO t1 VALUES (3,'d','no');
SELECT v2
FROM t1
WHERE v1 IN ('f', 'd', 'h', 'u' ) AND i = 2;
v2
yes-u
yes-h
# Should not use index_merge
EXPLAIN
SELECT v2
FROM t1
WHERE v1 IN ('f', 'd', 'h', 'u' ) AND i = 2;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref i,v i 5 const 2 Using where
DROP TABLE t1;
#
# BUG#1006164: Multi-table DELETE that uses innodb + index_merge/intersect may fail to delete rows
#
create table t1 (
pk int auto_increment,
zone_id int,
modified tinyint,
primary key(pk),
key (zone_id),
key (modified)
) engine=innodb;
insert into t1 (zone_id, modified) select 0,0 from seq_1_to_10000;
update t1 set zone_id=487, modified=9 where pk=7259;
update t1 set zone_id=487, modified=9 where pk=7260;
update t1 set zone_id=830, modified=9 where pk=8434;
update t1 set zone_id=830, modified=9 where pk=8435;
update t1 set zone_id=830, modified=9 where pk=8436;
update t1 set zone_id=830, modified=9 where pk=8437;
select * from t1 where t1.zone_id=830AND modified=9;
pk zone_id modified 84348309 84358309 84368309 84378309
begin;
DELETE t1 FROM t1 WHERE t1.zone_id=830AND modified=9;
commit;
select * from t1 where t1.zone_id=830AND modified=9;
pk zone_id modified
drop table t1;
#
# MDEV-376: Wrong result (missing rows) with index_merge+index_merge_intersection, join
#
CREATE TABLE t1 (
a INT, b CHAR(1), c CHAR(1), KEY(a), KEY(b)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (8,'v','v'),(8,'m','m'),(9,'d','d');
SELECT ta.* FROM t1 AS ta, t1 AS tb
WHERE ( tb.b != ta.b OR tb.a = ta.a ) AND ( tb.b = ta.c OR tb.b = ta.b );
a b c 8 v v 8 m m 9 d d
DROP TABLE t1; set optimizer_switch= @optimizer_switch_save;
#
# MDEV-10927: Crash When Using sort_union Optimization
# set @tmp_optimizer_switch=@@optimizer_switch; SET optimizer_switch='index_merge_sort_intersection=on'; SET SESSION sort_buffer_size = 1024;
create table t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
col1 int(11) NOT NULL,
col2 int(11) NOT NULL,
col3 int(11) NOT NULL,
key2 int(11) NOT NULL,
col4 int(11) NOT NULL,
key1 int(11) NOT NULL,
PRIMARY KEY (pk),
KEY key1 (key1),
KEY key2 (key2)
) ENGINE=InnoDB AUTO_INCREMENT=12860259 DEFAULT CHARSET=utf8 ROW_FORMAT=COMPACT;
insert into t1 (key1, key2, col1,col2,col3,col4)
select seq,seq,seq,seq,seq,seq from seq_1_to_10000;
SELECT sum(col1) FROM t1 FORCE INDEX (key1,key2) WHERE (key1 between 10and8191+10) or (key2= 5);
sum(col1) 33632261
drop table t1; set optimizer_switch=@tmp_optimizer_switch;
#
# MDEV-22728: SIGFPE in Unique::get_cost_calc_buff_size from prepare_search_best_index_intersect
# on optimized builds
# SET @save_sort_buffer_size=@@sort_buffer_size; SET sort_buffer_size=2048;
CREATE TABLE t1 (
a VARCHAR(1024) PRIMARY KEY,
b INT,
c INT,
INDEX (b)
) ENGINE=InnoDB CHARSET utf8mb3 ROW_FORMAT= DYNAMIC;
INSERT INTO t1 SELECT seq, seq, seq from seq_1_to_100;
EXPLAIN SELECT * FROM t1 WHERE a='1'OR b < 5;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL PRIMARY,b NULL NULL NULL 100 Using where
SELECT * FROM t1 WHERE a='1'OR b < 5;
a b c 111 222 333 444
DROP TABLE t1; SET sort_buffer_size= @save_sort_buffer_size;
disconnect disable_purge; SET GLOBAL innodb_stats_persistent=@save_stats_persistent;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.17 Sekunden
(vorverarbeitet am 2026-10-08)
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