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d9c701eb3d
Some optimization to reduce rules number in sql_yacc.yy mysql-test/r/create.result: Now table and database inhirited a character set from a level above at CREATE time mysql-test/r/fulltext.result: Now table and database inhirited a character set from a level above at CREATE time mysql-test/r/innodb.result: Now table and database inhirited a character set from a level above at CREATE time mysql-test/r/merge.result: Now table and database inhirited a character set from a level above at CREATE time mysql-test/r/show_check.result: Now table and database inhirited a character set from a level above at CREATE time mysql-test/r/symlink.result: Now table and database inhirited a character set from a level above at CREATE time mysql-test/r/type_enum.result: Now table and database inhirited a character set from a level above at CREATE time mysql-test/r/type_set.result: Now table and database inhirited a character set from a level above at CREATE time sql/sql_yacc.yy: Now table and database inhirited a character set from a level above at CREATE time Some optimization to reduce rules number
464 lines
8.7 KiB
Text
464 lines
8.7 KiB
Text
drop table if exists t1,t2,t3,t4,t5,t6;
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create table t1 (a int not null primary key auto_increment, message char(20));
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create table t2 (a int not null primary key auto_increment, message char(20));
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INSERT INTO t1 (message) VALUES ("Testing"),("table"),("t1");
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INSERT INTO t2 (message) VALUES ("Testing"),("table"),("t2");
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create table t3 (a int not null, b char(20), key(a)) type=MERGE UNION=(t1,t2);
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select * from t3;
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a b
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1 Testing
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2 table
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3 t1
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1 Testing
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2 table
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3 t2
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select * from t3 order by a desc;
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a b
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3 t1
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3 t2
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2 table
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2 table
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1 Testing
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1 Testing
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drop table t3;
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insert into t1 select NULL,message from t2;
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insert into t2 select NULL,message from t1;
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insert into t1 select NULL,message from t2;
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insert into t2 select NULL,message from t1;
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insert into t1 select NULL,message from t2;
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insert into t2 select NULL,message from t1;
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insert into t1 select NULL,message from t2;
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insert into t2 select NULL,message from t1;
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insert into t1 select NULL,message from t2;
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insert into t2 select NULL,message from t1;
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insert into t1 select NULL,message from t2;
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create table t3 (a int not null, b char(20), key(a)) type=MERGE UNION=(test.t1,test.t2);
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explain select * from t3 where a < 10;
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table type possible_keys key key_len ref rows Extra
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t3 range a a 4 NULL 10 where used
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explain select * from t3 where a > 10 and a < 20;
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table type possible_keys key key_len ref rows Extra
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t3 range a a 4 NULL 10 where used
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select * from t3 where a = 10;
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a b
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10 Testing
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10 Testing
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select * from t3 where a < 10;
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a b
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1 Testing
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1 Testing
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2 table
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2 table
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3 t1
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3 t2
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4 Testing
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4 Testing
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5 table
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5 table
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6 t1
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6 t2
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7 Testing
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7 Testing
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8 table
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8 table
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9 t2
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9 t2
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select * from t3 where a > 10 and a < 20;
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a b
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11 table
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11 table
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12 t1
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12 t1
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13 Testing
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13 Testing
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14 table
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14 table
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15 t2
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15 t2
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16 Testing
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16 Testing
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17 table
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17 table
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18 t2
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18 t2
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19 Testing
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19 Testing
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explain select a from t3 order by a desc limit 10;
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table type possible_keys key key_len ref rows Extra
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t3 index NULL a 4 NULL 1131 Using index
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select a from t3 order by a desc limit 10;
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a
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699
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698
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697
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696
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695
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694
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693
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692
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691
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690
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select a from t3 order by a desc limit 300,10;
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a
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416
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415
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415
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414
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414
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413
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413
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412
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412
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411
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delete from t3 where a=3;
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select * from t3 where a < 10;
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a b
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1 Testing
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1 Testing
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2 table
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2 table
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4 Testing
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4 Testing
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5 table
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5 table
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6 t2
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6 t1
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7 Testing
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7 Testing
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8 table
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8 table
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9 t2
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9 t2
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delete from t3 where a >= 6 and a <= 8;
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select * from t3 where a < 10;
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a b
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1 Testing
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1 Testing
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2 table
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2 table
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4 Testing
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4 Testing
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5 table
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5 table
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9 t2
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9 t2
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update t3 set a=3 where a=9;
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select * from t3 where a < 10;
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a b
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1 Testing
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1 Testing
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2 table
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2 table
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3 t2
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3 t2
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4 Testing
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4 Testing
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5 table
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5 table
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update t3 set a=6 where a=7;
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select * from t3 where a < 10;
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a b
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1 Testing
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1 Testing
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2 table
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2 table
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3 t2
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3 t2
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4 Testing
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4 Testing
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5 table
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5 table
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show create table t3;
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Table Create Table
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t3 CREATE TABLE `t3` (
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`a` int(11) NOT NULL default '0',
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`b` char(20) character set latin1 default NULL,
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KEY `a` (`a`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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create table t4 (a int not null, b char(10), key(a)) type=MERGE UNION=(t1,t2);
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select * from t4;
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Can't open file: 't4.MRG'. (errno: 143)
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create table t5 (a int not null, b char(10), key(a)) type=MERGE UNION=(test.t1,test_2.t2);
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Incorrect table definition; All MERGE tables must be in the same database
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drop table if exists t5,t4,t3,t1,t2;
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create table t1 (c char(10)) type=myisam;
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create table t2 (c char(10)) type=myisam;
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create table t3 (c char(10)) union=(t1,t2) type=merge;
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insert into t1 (c) values ('test1');
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insert into t1 (c) values ('test1');
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insert into t1 (c) values ('test1');
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insert into t2 (c) values ('test2');
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insert into t2 (c) values ('test2');
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insert into t2 (c) values ('test2');
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select * from t3;
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c
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test1
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test1
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test1
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test2
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test2
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test2
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select * from t3;
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c
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test1
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test1
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test1
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test2
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test2
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test2
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delete from t3 where 1=1;
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select * from t3;
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c
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select * from t1;
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c
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drop table t3,t2,t1;
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CREATE TABLE t1 (incr int not null, othr int not null, primary key(incr));
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CREATE TABLE t2 (incr int not null, othr int not null, primary key(incr));
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CREATE TABLE t3 (incr int not null, othr int not null, primary key(incr))
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TYPE=MERGE UNION=(t1,t2);
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SELECT * from t3;
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incr othr
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INSERT INTO t1 VALUES ( 1,10),( 3,53),( 5,21),( 7,12),( 9,17);
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INSERT INTO t2 VALUES ( 2,24),( 4,33),( 6,41),( 8,26),( 0,32);
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INSERT INTO t1 VALUES (11,20),(13,43),(15,11),(17,22),(19,37);
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INSERT INTO t2 VALUES (12,25),(14,31),(16,42),(18,27),(10,30);
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SELECT * from t3 where incr in (1,2,3,4) order by othr;
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incr othr
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1 10
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2 24
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4 33
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3 53
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alter table t3 UNION=(t1);
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select count(*) from t3;
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count(*)
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10
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alter table t3 UNION=(t1,t2);
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select count(*) from t3;
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count(*)
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20
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alter table t3 TYPE=MYISAM;
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select count(*) from t3;
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count(*)
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20
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drop table t3;
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CREATE TABLE t3 (incr int not null, othr int not null, primary key(incr))
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TYPE=MERGE UNION=(t1,t2);
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show create table t3;
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Table Create Table
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t3 CREATE TABLE `t3` (
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`incr` int(11) NOT NULL default '0',
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`othr` int(11) NOT NULL default '0',
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PRIMARY KEY (`incr`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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alter table t3 drop primary key;
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show create table t3;
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Table Create Table
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t3 CREATE TABLE `t3` (
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`incr` int(11) NOT NULL default '0',
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`othr` int(11) NOT NULL default '0'
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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drop table t3,t2,t1;
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create table t1 (a int not null) type=merge;
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select * from t1;
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a
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drop table t1;
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drop table if exists t3, t2, t1;
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create table t1 (a int not null, b int not null, key(a,b));
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create table t2 (a int not null, b int not null, key(a,b));
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create table t3 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2);
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insert into t1 values (1,2),(2,1),(0,0),(4,4),(5,5),(6,6);
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insert into t2 values (1,1),(2,2),(0,0),(4,4),(5,5),(6,6);
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flush tables;
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select * from t3 where a=1 order by b limit 2;
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a b
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1 1
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1 2
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drop table t3,t1,t2;
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drop table if exists t6, t5, t4, t3, t2, t1;
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create table t1 (a int not null, b int not null, key(a,b));
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create table t2 (a int not null, b int not null, key(a,b));
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create table t3 (a int not null, b int not null, key(a,b)) UNION=(t1,t2) INSERT_METHOD=NO;
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create table t4 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=NO;
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create table t5 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
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create table t6 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;
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show create table t3;
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Table Create Table
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t3 CREATE TABLE `t3` (
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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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KEY `a` (`a`,`b`)
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) TYPE=MyISAM CHARSET=latin1
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show create table t4;
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Table Create Table
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t4 CREATE TABLE `t4` (
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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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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2)
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show create table t5;
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Table Create Table
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t5 CREATE TABLE `t5` (
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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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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(t1,t2)
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show create table t6;
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Table Create Table
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t6 CREATE TABLE `t6` (
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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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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=LAST UNION=(t1,t2)
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insert into t1 values (1,1),(1,2),(1,3),(1,4);
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insert into t2 values (2,1),(2,2),(2,3),(2,4);
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select * from t3 order by b,a limit 3;
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a b
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select * from t4 order by b,a limit 3;
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a b
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1 1
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2 1
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1 2
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select * from t5 order by b,a limit 3,3;
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a b
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2 2
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1 3
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2 3
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select * from t6 order by b,a limit 6,3;
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a b
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1 4
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2 4
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insert into t5 values (5,1),(5,2);
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insert into t6 values (6,1),(6,2);
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select * from t1 order by a,b;
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a b
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1 1
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1 2
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1 3
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1 4
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5 1
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5 2
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select * from t2 order by a,b;
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a b
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2 1
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2 2
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2 3
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2 4
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6 1
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6 2
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select * from t4 order by a,b;
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a b
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1 1
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1 2
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1 3
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1 4
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2 1
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2 2
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2 3
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2 4
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5 1
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5 2
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6 1
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6 2
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insert into t3 values (3,1),(3,2),(3,3),(3,4);
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select * from t3 order by a,b;
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a b
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3 1
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3 2
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3 3
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3 4
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alter table t4 UNION=(t1,t2,t3);
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show create table t4;
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Table Create Table
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t4 CREATE TABLE `t4` (
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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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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 UNION=(t1,t2,t3)
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select * from t4 order by a,b;
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a b
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1 1
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1 2
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1 3
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1 4
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2 1
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2 2
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2 3
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2 4
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3 1
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3 2
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3 3
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3 4
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5 1
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5 2
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6 1
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6 2
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alter table t4 INSERT_METHOD=FIRST;
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show create table t4;
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Table Create Table
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t4 CREATE TABLE `t4` (
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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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KEY `a` (`a`,`b`)
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) TYPE=MRG_MyISAM CHARSET=latin1 INSERT_METHOD=FIRST UNION=(t1,t2,t3)
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insert into t4 values (4,1),(4,2);
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select * from t1 order by a,b;
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a b
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1 1
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1 2
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1 3
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1 4
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4 1
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4 2
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5 1
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5 2
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select * from t2 order by a,b;
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a b
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2 1
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2 2
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2 3
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2 4
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6 1
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6 2
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select * from t3 order by a,b;
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a b
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3 1
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3 2
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3 3
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3 4
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select * from t4 order by a,b;
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a b
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1 1
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1 2
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1 3
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1 4
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2 1
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2 2
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2 3
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2 4
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3 1
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3 2
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3 3
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3 4
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4 1
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4 2
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5 1
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5 2
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6 1
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6 2
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select * from t5 order by a,b;
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a b
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1 1
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1 2
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1 3
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1 4
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2 1
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2 2
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2 3
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2 4
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4 1
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4 2
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5 1
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5 2
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6 1
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6 2
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drop table if exists t6, t5, t4, t3, t2, t1;
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