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@ -1,329 +1,3 @@ |
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#---------------- Index merge test 2 ------------------------------------------- |
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SET SESSION STORAGE_ENGINE = InnoDB; |
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drop table if exists t1,t2; |
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create table t1 |
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( |
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key1 int not null, |
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key2 int not null, |
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INDEX i1(key1), |
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INDEX i2(key2) |
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); |
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explain select * from t1 where key1 < 5 or key2 > 197; |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where |
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select * from t1 where key1 < 5 or key2 > 197; |
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key1 key2 |
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0 200 |
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1 199 |
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2 198 |
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3 197 |
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4 196 |
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explain select * from t1 where key1 < 3 or key2 > 195; |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where |
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select * from t1 where key1 < 3 or key2 > 195; |
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key1 key2 |
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0 200 |
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1 199 |
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2 198 |
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3 197 |
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4 196 |
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alter table t1 add str1 char (255) not null, |
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add zeroval int not null default 0, |
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add str2 char (255) not null, |
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add str3 char (255) not null; |
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update t1 set str1='aaa', str2='bbb', str3=concat(key2, '-', key1 div 2, '_' ,if(key1 mod 2 = 0, 'a', 'A')); |
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alter table t1 add primary key (str1, zeroval, str2, str3); |
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explain select * from t1 where key1 < 5 or key2 > 197; |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where |
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select * from t1 where key1 < 5 or key2 > 197; |
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key1 key2 str1 zeroval str2 str3 |
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4 196 aaa 0 bbb 196-2_a |
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3 197 aaa 0 bbb 197-1_A |
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2 198 aaa 0 bbb 198-1_a |
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1 199 aaa 0 bbb 199-0_A |
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0 200 aaa 0 bbb 200-0_a |
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explain select * from t1 where key1 < 3 or key2 > 195; |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where |
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select * from t1 where key1 < 3 or key2 > 195; |
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key1 key2 str1 zeroval str2 str3 |
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4 196 aaa 0 bbb 196-2_a |
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3 197 aaa 0 bbb 197-1_A |
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2 198 aaa 0 bbb 198-1_a |
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1 199 aaa 0 bbb 199-0_A |
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0 200 aaa 0 bbb 200-0_a |
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drop table t1; |
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create table t1 ( |
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pk integer not null auto_increment primary key, |
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key1 integer, |
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key2 integer not null, |
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filler char (200), |
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index (key1), |
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index (key2) |
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); |
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show warnings; |
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Level Code Message |
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explain select pk from t1 where key1 = 1 and key2 = 1; |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge key1,key2 key1,key2 5,4 NULL 1 Using intersect(key1,key2); Using where; Using index |
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select pk from t1 where key2 = 1 and key1 = 1; |
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pk |
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26 |
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27 |
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select pk from t1 ignore index(key1,key2) where key2 = 1 and key1 = 1; |
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pk |
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26 |
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27 |
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drop table t1; |
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create table t1 ( |
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pk int primary key auto_increment, |
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key1a int, |
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key2a int, |
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key1b int, |
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key2b int, |
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dummy1 int, |
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dummy2 int, |
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dummy3 int, |
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dummy4 int, |
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key3a int, |
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key3b int, |
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filler1 char (200), |
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index i1(key1a, key1b), |
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index i2(key2a, key2b), |
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index i3(key3a, key3b) |
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); |
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create table t2 (a int); |
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insert into t2 values (0),(1),(2),(3),(4),(NULL); |
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insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b) |
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select A.a, B.a, C.a, D.a, C.a, D.a from t2 A,t2 B,t2 C, t2 D; |
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insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b) |
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select key1a, key1b, key2a, key2b, key3a, key3b from t1; |
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insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b) |
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select key1a, key1b, key2a, key2b, key3a, key3b from t1; |
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analyze table t1; |
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Table Op Msg_type Msg_text |
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test.t1 analyze status OK |
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select count(*) from t1; |
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count(*) |
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5184 |
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explain select count(*) from t1 where |
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key1a = 2 and key1b is null and key2a = 2 and key2b is null; |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge i1,i2 i1,i2 10,10 NULL # Using intersect(i1,i2); Using where; Using index |
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select count(*) from t1 where |
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key1a = 2 and key1b is null and key2a = 2 and key2b is null; |
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count(*) |
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4 |
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explain select count(*) from t1 where |
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key1a = 2 and key1b is null and key3a = 2 and key3b is null; |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge i1,i3 i1,i3 10,10 NULL # Using intersect(i1,i3); Using where; Using index |
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select count(*) from t1 where |
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key1a = 2 and key1b is null and key3a = 2 and key3b is null; |
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count(*) |
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4 |
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drop table t1,t2; |
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create table t1 ( |
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id1 int, |
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id2 date , |
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index idx2 (id1,id2), |
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index idx1 (id2) |
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); |
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insert into t1 values(1,'20040101'), (2,'20040102'); |
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select * from t1 where id1 = 1 and id2= '20040101'; |
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id1 id2 |
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1 2004-01-01 |
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drop table t1; |
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drop view if exists v1; |
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CREATE TABLE t1 ( |
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`oid` int(11) unsigned NOT NULL auto_increment, |
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`fk_bbk_niederlassung` int(11) unsigned NOT NULL, |
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`fk_wochentag` int(11) unsigned NOT NULL, |
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`uhrzeit_von` time NOT NULL COMMENT 'HH:MM', |
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`uhrzeit_bis` time NOT NULL COMMENT 'HH:MM', |
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`geloescht` tinyint(4) NOT NULL, |
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`version` int(5) NOT NULL, |
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PRIMARY KEY (`oid`), |
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KEY `fk_bbk_niederlassung` (`fk_bbk_niederlassung`), |
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KEY `fk_wochentag` (`fk_wochentag`), |
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KEY `ix_version` (`version`) |
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) DEFAULT CHARSET=latin1; |
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insert into t1 values |
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(1, 38, 1, '08:00:00', '13:00:00', 0, 1), |
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(2, 38, 2, '08:00:00', '13:00:00', 0, 1), |
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(3, 38, 3, '08:00:00', '13:00:00', 0, 1), |
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(4, 38, 4, '08:00:00', '13:00:00', 0, 1), |
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(5, 38, 5, '08:00:00', '13:00:00', 0, 1), |
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(6, 38, 5, '08:00:00', '13:00:00', 1, 2), |
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(7, 38, 3, '08:00:00', '13:00:00', 1, 2), |
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(8, 38, 1, '08:00:00', '13:00:00', 1, 2), |
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(9, 38, 2, '08:00:00', '13:00:00', 1, 2), |
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(10, 38, 4, '08:00:00', '13:00:00', 1, 2), |
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(11, 38, 1, '08:00:00', '13:00:00', 0, 3), |
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(12, 38, 2, '08:00:00', '13:00:00', 0, 3), |
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(13, 38, 3, '08:00:00', '13:00:00', 0, 3), |
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(14, 38, 4, '08:00:00', '13:00:00', 0, 3), |
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(15, 38, 5, '08:00:00', '13:00:00', 0, 3), |
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(16, 38, 4, '08:00:00', '13:00:00', 0, 4), |
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(17, 38, 5, '08:00:00', '13:00:00', 0, 4), |
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(18, 38, 1, '08:00:00', '13:00:00', 0, 4), |
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(19, 38, 2, '08:00:00', '13:00:00', 0, 4), |
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(20, 38, 3, '08:00:00', '13:00:00', 0, 4), |
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(21, 7, 1, '08:00:00', '13:00:00', 0, 1), |
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(22, 7, 2, '08:00:00', '13:00:00', 0, 1), |
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(23, 7, 3, '08:00:00', '13:00:00', 0, 1), |
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(24, 7, 4, '08:00:00', '13:00:00', 0, 1), |
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(25, 7, 5, '08:00:00', '13:00:00', 0, 1); |
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create view v1 as |
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select |
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zeit1.oid AS oid, |
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zeit1.fk_bbk_niederlassung AS fk_bbk_niederlassung, |
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zeit1.fk_wochentag AS fk_wochentag, |
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zeit1.uhrzeit_von AS uhrzeit_von, |
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zeit1.uhrzeit_bis AS uhrzeit_bis, |
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zeit1.geloescht AS geloescht, |
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zeit1.version AS version |
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from |
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t1 zeit1 |
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where |
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(zeit1.version = |
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(select max(zeit2.version) AS `max(version)` |
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from t1 zeit2 |
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where |
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((zeit1.fk_bbk_niederlassung = zeit2.fk_bbk_niederlassung) and |
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(zeit1.fk_wochentag = zeit2.fk_wochentag) and |
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(zeit1.uhrzeit_von = zeit2.uhrzeit_von) and |
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(zeit1.uhrzeit_bis = zeit2.uhrzeit_bis) |
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) |
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) |
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) |
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and (zeit1.geloescht = 0); |
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select * from v1 where oid = 21; |
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oid fk_bbk_niederlassung fk_wochentag uhrzeit_von uhrzeit_bis geloescht version |
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21 7 1 08:00:00 13:00:00 0 1 |
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drop view v1; |
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drop table t1; |
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CREATE TABLE t1( |
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t_cpac varchar(2) NOT NULL, |
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t_vers varchar(4) NOT NULL, |
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t_rele varchar(2) NOT NULL, |
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t_cust varchar(4) NOT NULL, |
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filler1 char(250) default NULL, |
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filler2 char(250) default NULL, |
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PRIMARY KEY (t_cpac,t_vers,t_rele,t_cust), |
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UNIQUE KEY IX_4 (t_cust,t_cpac,t_vers,t_rele), |
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KEY IX_5 (t_vers,t_rele,t_cust) |
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); |
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insert into t1 values |
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('tm','2.5 ','a ',' ','',''), ('tm','2.5U','a ','stnd','',''), |
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('da','3.3 ','b ',' ','',''), ('da','3.3U','b ','stnd','',''), |
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('tl','7.6 ','a ',' ','',''), ('tt','7.6 ','a ',' ','',''), |
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('bc','B61 ','a ',' ','',''), ('bp','B61 ','a ',' ','',''), |
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('ca','B61 ','a ',' ','',''), ('ci','B61 ','a ',' ','',''), |
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('cp','B61 ','a ',' ','',''), ('dm','B61 ','a ',' ','',''), |
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('ec','B61 ','a ',' ','',''), ('ed','B61 ','a ',' ','',''), |
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('fm','B61 ','a ',' ','',''), ('nt','B61 ','a ',' ','',''), |
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('qm','B61 ','a ',' ','',''), ('tc','B61 ','a ',' ','',''), |
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('td','B61 ','a ',' ','',''), ('tf','B61 ','a ',' ','',''), |
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('tg','B61 ','a ',' ','',''), ('ti','B61 ','a ',' ','',''), |
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('tp','B61 ','a ',' ','',''), ('ts','B61 ','a ',' ','',''), |
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('wh','B61 ','a ',' ','',''), ('bc','B61U','a ','stnd','',''), |
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('bp','B61U','a ','stnd','',''), ('ca','B61U','a ','stnd','',''), |
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('ci','B61U','a ','stnd','',''), ('cp','B61U','a ','stnd','',''), |
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('dm','B61U','a ','stnd','',''), ('ec','B61U','a ','stnd','',''), |
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('fm','B61U','a ','stnd','',''), ('nt','B61U','a ','stnd','',''), |
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('qm','B61U','a ','stnd','',''), ('tc','B61U','a ','stnd','',''), |
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('td','B61U','a ','stnd','',''), ('tf','B61U','a ','stnd','',''), |
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('tg','B61U','a ','stnd','',''), ('ti','B61U','a ','stnd','',''), |
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('tp','B61U','a ','stnd','',''), ('ts','B61U','a ','stnd','',''), |
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('wh','B61U','a ','stnd','',''); |
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show create table t1; |
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Table Create Table |
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t1 CREATE TABLE `t1` ( |
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`t_cpac` varchar(2) NOT NULL, |
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`t_vers` varchar(4) NOT NULL, |
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`t_rele` varchar(2) NOT NULL, |
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`t_cust` varchar(4) NOT NULL, |
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`filler1` char(250) DEFAULT NULL, |
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`filler2` char(250) DEFAULT NULL, |
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PRIMARY KEY (`t_cpac`,`t_vers`,`t_rele`,`t_cust`), |
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UNIQUE KEY `IX_4` (`t_cust`,`t_cpac`,`t_vers`,`t_rele`), |
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KEY `IX_5` (`t_vers`,`t_rele`,`t_cust`) |
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) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
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select t_vers,t_rele,t_cust,filler1 from t1 where t_vers = '7.6'; |
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t_vers t_rele t_cust filler1 |
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7.6 a |
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7.6 a |
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select t_vers,t_rele,t_cust,filler1 from t1 where t_vers = '7.6' |
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and t_rele='a' and t_cust = ' '; |
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t_vers t_rele t_cust filler1 |
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7.6 a |
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7.6 a |
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drop table t1; |
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create table t1 ( |
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pk int(11) not null auto_increment, |
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a int(11) not null default '0', |
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b int(11) not null default '0', |
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c int(11) not null default '0', |
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filler1 datetime, filler2 varchar(15), |
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filler3 longtext, |
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kp1 varchar(4), kp2 varchar(7), |
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kp3 varchar(2), kp4 varchar(4), |
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kp5 varchar(7), |
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filler4 char(1), |
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primary key (pk), |
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key idx1(a,b,c), |
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key idx2(c), |
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key idx3(kp1,kp2,kp3,kp4,kp5) |
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) default charset=latin1; |
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set @fill=NULL; |
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SELECT COUNT(*) FROM t1 WHERE b = 0 AND a = 0 AND c = 13286427 AND |
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kp1='279' AND kp2='ELM0678' AND kp3='6' AND kp4='10' AND kp5 = 'R '; |
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COUNT(*) |
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1 |
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drop table t1; |
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create table t1 |
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( |
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key1 int not null, |
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key2 int not null default 0, |
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key3 int not null default 0 |
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); |
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insert into t1(key1) values (1),(2),(3),(4),(5),(6),(7),(8); |
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set @d=8; |
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insert into t1 (key1) select key1+@d from t1; |
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set @d=@d*2; |
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insert into t1 (key1) select key1+@d from t1; |
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set @d=@d*2; |
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insert into t1 (key1) select key1+@d from t1; |
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set @d=@d*2; |
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insert into t1 (key1) select key1+@d from t1; |
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set @d=@d*2; |
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insert into t1 (key1) select key1+@d from t1; |
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set @d=@d*2; |
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insert into t1 (key1) select key1+@d from t1; |
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set @d=@d*2; |
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insert into t1 (key1) select key1+@d from t1; |
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set @d=@d*2; |
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alter table t1 add index i2(key2); |
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alter table t1 add index i3(key3); |
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update t1 set key2=key1,key3=key1; |
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explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); |
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id select_type table type possible_keys key key_len ref rows Extra |
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1 SIMPLE t1 index_merge i2,i3 i3,i2 4,4 NULL 9 Using sort_union(i3,i2); Using where |
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select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); |
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key1 key2 key3 |
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31 31 31 |
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32 32 32 |
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33 33 33 |
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34 34 34 |
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35 35 35 |
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36 36 36 |
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37 37 37 |
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38 38 38 |
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39 39 39 |
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drop table t1; |
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#---------------- 2-sweeps read Index merge test 2 ------------------------------- |
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SET SESSION STORAGE_ENGINE = InnoDB; |
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drop table if exists t1; |
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Alexander Nozdrin
16 years ago