221 lines
6.6 KiB
Plaintext
221 lines
6.6 KiB
Plaintext
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drop table if exists t1;
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select 'a' = 'a', 'a' = 'a ', 'a ' = 'a';
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'a' = 'a' 'a' = 'a ' 'a ' = 'a'
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1 1 1
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select 'a\0' = 'a', 'a\0' < 'a', 'a\0' > 'a';
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'a\0' = 'a' 'a\0' < 'a' 'a\0' > 'a'
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0 1 0
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select 'a' = 'a\0', 'a' < 'a\0', 'a' > 'a\0';
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'a' = 'a\0' 'a' < 'a\0' 'a' > 'a\0'
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0 0 1
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select 'a\0' = 'a ', 'a\0' < 'a ', 'a\0' > 'a ';
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'a\0' = 'a ' 'a\0' < 'a ' 'a\0' > 'a '
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0 1 0
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select 'a ' = 'a\0', 'a ' < 'a\0', 'a ' > 'a\0';
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'a ' = 'a\0' 'a ' < 'a\0' 'a ' > 'a\0'
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0 0 1
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select 'a a' > 'a', 'a \0' < 'a';
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'a a' > 'a' 'a \0' < 'a'
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1 1
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select binary 'a a' > 'a', binary 'a \0' > 'a', binary 'a\0' > 'a';
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binary 'a a' > 'a' binary 'a \0' > 'a' binary 'a\0' > 'a'
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1 1 1
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create table t1 (text1 varchar(32) not NULL, KEY key1 (text1));
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insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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select * from t1 ignore key (key1) where text1='teststring' or
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text1 like 'teststring_%' ORDER BY text1;
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text1
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teststring
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teststring
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select * from t1 where text1='teststring' or text1 like 'teststring_%';
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text1
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teststring
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teststring
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select * from t1 where text1='teststring' or text1 > 'teststring\t';
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text1
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teststring
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select * from t1 order by text1;
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text1
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nothing
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teststring
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teststring
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explain select * from t1 order by text1;
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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 NULL key1 34 NULL 3 Using index
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alter table t1 modify text1 char(32) binary not null;
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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select * from t1 ignore key (key1) where text1='teststring' or
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text1 like 'teststring_%' ORDER BY text1;
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text1
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teststring
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teststring
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select concat('|', text1, '|') from t1 where text1='teststring' or text1 like 'teststring_%';
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concat('|', text1, '|')
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|teststring |
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|teststring|
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select concat('|', text1, '|') from t1 where text1='teststring' or text1 > 'teststring\t';
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concat('|', text1, '|')
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|teststring|
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select text1, length(text1) from t1 order by text1;
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text1 length(text1)
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nothing 7
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teststring 11
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teststring 10
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select text1, length(text1) from t1 order by binary text1;
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text1 length(text1)
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nothing 7
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teststring 10
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teststring 11
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alter table t1 modify text1 blob not null, drop key key1, add key key1 (text1(20));
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insert into t1 values ('teststring ');
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select concat('|', text1, '|') from t1 order by text1;
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concat('|', text1, '|')
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|nothing|
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|teststring|
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|teststring |
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|teststring |
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select concat('|', text1, '|') from t1 where text1='teststring' or text1 > 'teststring\t';
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concat('|', text1, '|')
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|teststring|
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|teststring |
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select concat('|', text1, '|') from t1 where text1='teststring';
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concat('|', text1, '|')
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|teststring|
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select concat('|', text1, '|') from t1 where text1='teststring ';
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concat('|', text1, '|')
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|teststring |
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alter table t1 modify text1 text not null, pack_keys=1;
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select concat('|', text1, '|') from t1 where text1='teststring';
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concat('|', text1, '|')
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|teststring|
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|teststring |
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select concat('|', text1, '|') from t1 where text1='teststring ';
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concat('|', text1, '|')
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|teststring|
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|teststring |
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explain select concat('|', text1, '|') from t1 where text1='teststring ';
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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 key1 key1 22 const 2 Using where
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select concat('|', text1, '|') from t1 where text1 like 'teststring_%';
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concat('|', text1, '|')
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|teststring |
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|teststring |
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select concat('|', text1, '|') from t1 where text1='teststring' or text1 like 'teststring_%';
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concat('|', text1, '|')
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|teststring |
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|teststring|
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|teststring |
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select concat('|', text1, '|') from t1 where text1='teststring' or text1 > 'teststring\t';
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concat('|', text1, '|')
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|teststring|
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|teststring |
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select concat('|', text1, '|') from t1 order by text1;
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concat('|', text1, '|')
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|nothing|
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|teststring |
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|teststring|
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|teststring |
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drop table t1;
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create table t1 (text1 varchar(32) not NULL, KEY key1 (text1)) pack_keys=0;
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insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
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select concat('|', text1, '|') from t1 where text1='teststring' or text1 like 'teststring_%';
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concat('|', text1, '|')
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|teststring |
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|teststring|
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select concat('|', text1, '|') from t1 where text1='teststring' or text1 >= 'teststring\t';
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concat('|', text1, '|')
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|teststring |
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|teststring|
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drop table t1;
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create table t1 (text1 varchar(32) not NULL, KEY key1 using BTREE (text1)) engine=heap;
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insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
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select * from t1 ignore key (key1) where text1='teststring' or
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text1 like 'teststring_%' ORDER BY text1;
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text1
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teststring
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teststring
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select * from t1 where text1='teststring' or text1 like 'teststring_%';
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text1
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teststring
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teststring
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select * from t1 where text1='teststring' or text1 >= 'teststring\t';
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text1
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teststring
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teststring
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select * from t1 order by text1;
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text1
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nothing
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teststring
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teststring
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explain select * from t1 order by text1;
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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 NULL NULL NULL NULL 3 Using filesort
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alter table t1 modify text1 char(32) binary not null;
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select * from t1 order by text1;
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text1
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nothing
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teststring
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teststring
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drop table t1;
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create table t1 (text1 varchar(32) not NULL, KEY key1 (text1)) engine=innodb;
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insert into t1 values ('teststring'), ('nothing'), ('teststring\t');
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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select * from t1 where text1='teststring' or text1 like 'teststring_%';
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text1
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teststring
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teststring
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select * from t1 where text1='teststring' or text1 > 'teststring\t';
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text1
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teststring
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select * from t1 order by text1;
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text1
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nothing
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teststring
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teststring
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explain select * from t1 order by text1;
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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 NULL key1 34 NULL 3 Using index
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alter table t1 modify text1 char(32) binary not null;
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select * from t1 order by text1;
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text1
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nothing
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teststring
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teststring
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alter table t1 modify text1 blob not null, drop key key1, add key key1 (text1(20));
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insert into t1 values ('teststring ');
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select concat('|', text1, '|') from t1 order by text1;
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concat('|', text1, '|')
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|nothing|
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|teststring|
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|teststring |
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|teststring |
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alter table t1 modify text1 text not null, pack_keys=1;
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select * from t1 where text1 like 'teststring_%';
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text1
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teststring
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teststring
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select text1, length(text1) from t1 where text1='teststring' or text1 like 'teststring_%';
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text1 length(text1)
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teststring 11
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teststring 10
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teststring 11
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select text1, length(text1) from t1 where text1='teststring' or text1 >= 'teststring\t';
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text1 length(text1)
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teststring 11
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teststring 10
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teststring 11
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select concat('|', text1, '|') from t1 order by text1;
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concat('|', text1, '|')
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|nothing|
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|teststring |
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|teststring|
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|teststring |
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drop table t1;
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