mirror of
https://github.com/MariaDB/server.git
synced 2025-08-01 03:47:19 +03:00
Add support for up to VARCHAR (size up to 65535)
Renamed HA_VAR_LENGTH to HA_VAR_LENGTH_PART Renamed in all files FIELD_TYPE_STRING and FIELD_TYPE_VAR_STRING to MYSQL_TYPE_STRING and MYSQL_TYPE_VAR_STRING to make it easy to catch all possible errors Added support for VARCHAR KEYS to heap Removed support for ISAM Now only long VARCHAR columns are changed to TEXT on demand (not CHAR) Internal temporary files can now use fixed length tables if the used VARCHAR columns are short
This commit is contained in:
monty@mysql.com
@ -1,4 +1,4 @@
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drop table if exists t1;
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drop table if exists t1,t2,t3;
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create table t1 (a int not null,b int not null, primary key (a)) engine=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
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insert into t1 values(1,1),(2,2),(3,3),(4,4);
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delete from t1 where a=1 or a=0;
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@ -233,3 +233,421 @@ SELECT * FROM t1 WHERE B is not null;
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a B
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1 1
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DROP TABLE t1;
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set storage_engine=HEAP;
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create table t1 (v varchar(10), c char(10), t varchar(50));
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insert into t1 values('+ ', '+ ', '+ ');
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set @a=repeat(' ',20);
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insert into t1 values (concat('+',@a),concat('+',@a),concat('+',@a));
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Warnings:
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Warning 1265 Data truncated for column 'v' at row 1
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select concat('*',v,'*',c,'*',t,'*') from t1;
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concat('*',v,'*',c,'*',t,'*')
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*+ *+*+ *
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*+ *+*+ *
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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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`v` varchar(10) default NULL,
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`c` char(10) default NULL,
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`t` varchar(50) default NULL
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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create table t2 like t1;
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`v` varchar(10) default NULL,
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`c` char(10) default NULL,
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`t` varchar(50) default NULL
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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create table t3 select * from t1;
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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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`v` varchar(10) default NULL,
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`c` char(10) default NULL,
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`t` varchar(50) default NULL
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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alter table t1 modify c varchar(10);
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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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`v` varchar(10) default NULL,
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`c` varchar(10) default NULL,
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`t` varchar(50) default NULL
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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alter table t1 modify v char(10);
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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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`v` char(10) default NULL,
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`c` varchar(10) default NULL,
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`t` varchar(50) default NULL
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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alter table t1 modify t varchar(10);
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Warnings:
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Warning 1265 Data truncated for column 't' at row 2
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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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`v` char(10) default NULL,
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`c` varchar(10) default NULL,
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`t` varchar(10) default NULL
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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select concat('*',v,'*',c,'*',t,'*') from t1;
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concat('*',v,'*',c,'*',t,'*')
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*+*+*+ *
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*+*+*+ *
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drop table t1,t2,t3;
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create table t1 (v varchar(10), c char(10), t varchar(50), key(v), key(c), key(t(10)));
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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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`v` varchar(10) default NULL,
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`c` char(10) default NULL,
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`t` varchar(50) default NULL,
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KEY `v` (`v`),
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KEY `c` (`c`),
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KEY `t` (`t`(10))
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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select count(*) from t1;
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count(*)
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270
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insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1)));
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select count(*) from t1 where v='a';
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count(*)
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10
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select count(*) from t1 where c='a';
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count(*)
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10
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select count(*) from t1 where t='a';
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count(*)
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10
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select count(*) from t1 where v='a ';
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count(*)
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10
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select count(*) from t1 where c='a ';
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count(*)
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10
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select count(*) from t1 where t='a ';
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count(*)
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10
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select count(*) from t1 where v between 'a' and 'a ';
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count(*)
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10
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select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
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count(*)
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10
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select count(*) from t1 where v like 'a%';
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count(*)
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11
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select count(*) from t1 where c like 'a%';
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count(*)
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11
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select count(*) from t1 where t like 'a%';
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count(*)
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11
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select count(*) from t1 where v like 'a %';
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count(*)
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9
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explain select count(*) from t1 where v='a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref v v 13 const 10 Using where
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explain select count(*) from t1 where c='a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref c c 11 const 10 Using where
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explain select count(*) from t1 where t='a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref t t 13 const 10 Using where
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explain select count(*) from t1 where v like 'a%';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL v NULL NULL NULL 271 Using where
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explain select count(*) from t1 where v between 'a' and 'a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL v NULL NULL NULL 271 Using where
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explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL v NULL NULL NULL 271 Using where
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alter table t1 add unique(v);
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ERROR 23000: Duplicate entry '{ ' for key 1
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alter table t1 add key(v);
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select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a';
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qq
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a*a*a*
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explain select * from t1 where v='a';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref v,v_2 v 13 const 10 Using where
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select v,count(*) from t1 group by v limit 10;
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v count(*)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select v,count(t) from t1 group by v limit 10;
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v count(t)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select v,count(c) from t1 group by v limit 10;
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v count(c)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select sql_big_result v,count(t) from t1 group by v limit 10;
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v count(t)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select sql_big_result v,count(c) from t1 group by v limit 10;
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v count(c)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select c,count(*) from t1 group by c limit 10;
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c count(*)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select c,count(t) from t1 group by c limit 10;
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c count(t)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select sql_big_result c,count(t) from t1 group by c limit 10;
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c count(t)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select t,count(*) from t1 group by t limit 10;
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t count(*)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select t,count(t) from t1 group by t limit 10;
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t count(t)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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select sql_big_result t,count(t) from t1 group by t limit 10;
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t count(t)
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a 1
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a 10
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b 10
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c 10
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d 10
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e 10
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f 10
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g 10
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h 10
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i 10
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drop table t1;
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create table t1 (a char(10), unique (a));
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insert into t1 values ('a');
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a' for key 1
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alter table t1 modify a varchar(10);
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insert into t1 values ('a '),('a '),('a '),('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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update t1 set a='a ' where a like 'a ';
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update t1 set a='a ' where a like 'a ';
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drop table t1;
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create table t1 (v varchar(10), c char(10), t varchar(50), key using btree (v), key using btree (c), key using btree (t(10)));
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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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`v` varchar(10) default NULL,
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`c` char(10) default NULL,
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`t` varchar(50) default NULL,
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KEY `v` TYPE BTREE (`v`),
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KEY `c` TYPE BTREE (`c`),
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KEY `t` TYPE BTREE (`t`(10))
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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select count(*) from t1;
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count(*)
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270
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insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1)));
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select count(*) from t1 where v='a';
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count(*)
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10
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select count(*) from t1 where c='a';
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count(*)
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10
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select count(*) from t1 where t='a';
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count(*)
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10
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select count(*) from t1 where v='a ';
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count(*)
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10
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select count(*) from t1 where c='a ';
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count(*)
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10
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select count(*) from t1 where t='a ';
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count(*)
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10
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select count(*) from t1 where v between 'a' and 'a ';
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count(*)
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10
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select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
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count(*)
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10
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explain select count(*) from t1 where v='a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref v v 13 const # Using where
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explain select count(*) from t1 where c='a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref c c 11 const # Using where
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explain select count(*) from t1 where t='a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref t t 13 const # Using where
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explain select count(*) from t1 where v like 'a%';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range v v 13 NULL # Using where
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explain select count(*) from t1 where v between 'a' and 'a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range v v 13 NULL # Using where
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explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range v v 13 NULL # Using where
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alter table t1 add unique(v);
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ERROR 23000: Duplicate entry '{ ' for key 1
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alter table t1 add key(v);
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select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a';
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qq
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*a*a*a*
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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*a *a*a *
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explain select * from t1 where v='a';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref v,v_2 v 13 const 7 Using where
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drop table t1;
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create table t1 (a char(10), unique using btree (a)) engine=heap;
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insert into t1 values ('a');
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a' for key 1
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alter table t1 modify a varchar(10);
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insert into t1 values ('a '),('a '),('a '),('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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insert into t1 values ('a ');
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ERROR 23000: Duplicate entry 'a ' for key 1
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update t1 set a='a ' where a like 'a ';
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update t1 set a='a ' where a like 'a ';
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drop table t1;
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create table t1 (v varchar(10), c char(10), t varchar(50), key(v(5)), key(c(5)), key(t(5)));
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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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`v` varchar(10) default NULL,
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`c` char(10) default NULL,
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`t` varchar(50) default NULL,
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KEY `v` (`v`(5)),
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KEY `c` (`c`(5)),
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KEY `t` (`t`(5))
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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drop table t1;
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create table t1 (v varchar(65530), key(v(10)));
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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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`v` varchar(65530) default NULL,
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KEY `v` (`v`(10))
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) ENGINE=HEAP DEFAULT CHARSET=latin1
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insert into t1 values(repeat('a',65530));
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select length(v) from t1 where v=repeat('a',65530);
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length(v)
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65530
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drop table t1;
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set storage_engine=MyISAM;
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