| Server IP : 185.86.78.101 / Your IP : 216.73.216.213 Web Server : Apache System : Linux 675867-vds-valikoshka1996.gmhost.pp.ua 5.4.0-150-generic #167-Ubuntu SMP Mon May 15 17:35:05 UTC 2023 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /www/server/mysql/mysql-test/r/ |
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drop table if exists t1;
select 'a' = 'a', 'a' = 'a ', 'a ' = 'a';
'a' = 'a' 'a' = 'a ' 'a ' = 'a'
1 1 1
select 'a\0' = 'a', 'a\0' < 'a', 'a\0' > 'a';
'a\0' = 'a' 'a\0' < 'a' 'a\0' > 'a'
0 1 0
select 'a' = 'a\0', 'a' < 'a\0', 'a' > 'a\0';
'a' = 'a\0' 'a' < 'a\0' 'a' > 'a\0'
0 0 1
select 'a\0' = 'a ', 'a\0' < 'a ', 'a\0' > 'a ';
'a\0' = 'a ' 'a\0' < 'a ' 'a\0' > 'a '
0 1 0
select 'a ' = 'a\0', 'a ' < 'a\0', 'a ' > 'a\0';
'a ' = 'a\0' 'a ' < 'a\0' 'a ' > 'a\0'
0 0 1
select 'a a' > 'a', 'a \0' < 'a';
'a a' > 'a' 'a \0' < 'a'
1 1
select binary 'a a' > 'a', binary 'a \0' > 'a', binary 'a\0' > 'a';
binary 'a a' > 'a' binary 'a \0' > 'a' binary 'a\0' > 'a'
1 1 1
create table t1 (text1 varchar(32) not NULL, KEY key1 (text1));
insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
analyze table t1;
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
select * from t1 ignore key (key1) where text1='teststring' or
text1 like 'teststring_%' ORDER BY text1;
text1
teststring
teststring
select * from t1 where text1='teststring' or text1 like 'teststring_%';
text1
teststring
teststring
select * from t1 where text1='teststring' or text1 > 'teststring\t';
text1
teststring
select * from t1 order by text1;
text1
nothing
teststring
teststring
explain select * from t1 order by text1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL key1 34 NULL 3 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`text1` AS `text1` from `test`.`t1` order by `test`.`t1`.`text1`
alter table t1 modify text1 char(32) binary not null;
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
select * from t1 ignore key (key1) where text1='teststring' or
text1 like 'teststring_%' ORDER BY text1;
text1
teststring
teststring
select concat('|', text1, '|') as c from t1 where text1='teststring' or text1 like 'teststring_%' order by c;
c
|teststring |
|teststring|
select concat('|', text1, '|') from t1 where text1='teststring' or text1 > 'teststring\t';
concat('|', text1, '|')
|teststring|
select text1, length(text1) from t1 order by text1;
text1 length(text1)
nothing 7
teststring 11
teststring 10
select text1, length(text1) from t1 order by binary text1;
text1 length(text1)
nothing 7
teststring 10
teststring 11
alter table t1 modify text1 blob not null, drop key key1, add key key1 (text1(20));
insert into t1 values ('teststring ');
select concat('|', text1, '|') from t1 order by text1;
concat('|', text1, '|')
|nothing|
|teststring|
|teststring |
|teststring |
select concat('|', text1, '|') from t1 where text1='teststring' or text1 > 'teststring\t';
concat('|', text1, '|')
|teststring|
|teststring |
select concat('|', text1, '|') from t1 where text1='teststring';
concat('|', text1, '|')
|teststring|
select concat('|', text1, '|') from t1 where text1='teststring ';
concat('|', text1, '|')
|teststring |
alter table t1 modify text1 text not null, pack_keys=1;
analyze table t1;
select concat('|', text1, '|') from t1 where text1='teststring';
concat('|', text1, '|')
|teststring|
|teststring |
select concat('|', text1, '|') from t1 where text1='teststring ';
concat('|', text1, '|')
|teststring|
|teststring |
explain select concat('|', text1, '|') from t1 where text1='teststring ';
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ref key1 key1 22 const 2 100.00 Using where
Warnings:
Note 1003 /* select#1 */ select concat('|',`test`.`t1`.`text1`,'|') AS `concat('|', text1, '|')` from `test`.`t1` where (`test`.`t1`.`text1` = 'teststring ')
select concat('|', text1, '|') from t1 where text1 like 'teststring_%';
concat('|', text1, '|')
|teststring |
|teststring |
select concat('|', text1, '|') as c from t1 where text1='teststring' or text1 like 'teststring_%' order by c;
c
|teststring |
|teststring |
|teststring|
select concat('|', text1, '|') from t1 where text1='teststring' or text1 > 'teststring\t';
concat('|', text1, '|')
|teststring|
|teststring |
select concat('|', text1, '|') from t1 order by text1;
concat('|', text1, '|')
|nothing|
|teststring |
|teststring|
|teststring |
drop table t1;
create table t1 (text1 varchar(32) not NULL, KEY key1 (text1)) pack_keys=0;
insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
select concat('|', text1, '|') as c from t1 where text1='teststring' or text1 like 'teststring_%' order by c;
c
|teststring |
|teststring|
select concat('|', text1, '|') from t1 where text1='teststring' or text1 >= 'teststring\t';
concat('|', text1, '|')
|teststring |
|teststring|
drop table t1;
create table t1 (text1 varchar(32) not NULL, KEY key1 using BTREE (text1)) engine=heap;
insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
select * from t1 ignore key (key1) where text1='teststring' or
text1 like 'teststring_%' ORDER BY text1;
text1
teststring
teststring
select * from t1 where text1='teststring' or text1 like 'teststring_%';
text1
teststring
teststring
select * from t1 where text1='teststring' or text1 >= 'teststring\t';
text1
teststring
teststring
select * from t1 order by text1;
text1
nothing
teststring
teststring
explain select * from t1 order by text1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`text1` AS `text1` from `test`.`t1` order by `test`.`t1`.`text1`
alter table t1 modify text1 char(32) binary not null;
select * from t1 order by text1;
text1
nothing
teststring
teststring
drop table t1;
create table t1 (text1 varchar(32) not NULL, KEY key1 (text1)) engine=innodb;
insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
analyze table t1;
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
select * from t1 where text1='teststring' or text1 like 'teststring_%';
text1
teststring
teststring
select * from t1 where text1='teststring' or text1 > 'teststring\t';
text1
teststring
select * from t1 order by text1;
text1
nothing
teststring
teststring
explain select * from t1 order by text1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL key1 34 NULL 3 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`text1` AS `text1` from `test`.`t1` order by `test`.`t1`.`text1`
alter table t1 modify text1 char(32) binary not null;
select * from t1 order by text1;
text1
nothing
teststring
teststring
alter table t1 modify text1 blob not null, drop key key1, add key key1 (text1(20));
insert into t1 values ('teststring ');
select concat('|', text1, '|') from t1 order by text1;
concat('|', text1, '|')
|nothing|
|teststring|
|teststring |
|teststring |
alter table t1 modify text1 text not null, pack_keys=1;
select * from t1 where text1 like 'teststring_%';
text1
teststring
teststring
select text1, length(text1) from t1 where text1='teststring' or text1 like 'teststring_%';
text1 length(text1)
teststring 10
teststring 11
teststring 11
select text1, length(text1) from t1 where text1='teststring' or text1 >= 'teststring\t';
text1 length(text1)
teststring 10
teststring 11
teststring 11
select concat('|', text1, '|') from t1 order by text1;
concat('|', text1, '|')
|nothing|
|teststring |
|teststring|
|teststring |
drop table t1;