1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
drop table if exists t1;
SET @test_character_set= 'gbk';
SET @test_collation= 'gbk_chinese_ci';
SET @safe_character_set_server= @@character_set_server;
SET @safe_collation_server= @@collation_server;
SET @safe_character_set_client= @@character_set_client;
SET @safe_character_set_results= @@character_set_results;
SET character_set_server= @test_character_set;
SET collation_server= @test_collation;
CREATE DATABASE d1;
USE d1;
CREATE TABLE t1 (c CHAR(10), KEY(c));
SHOW FULL COLUMNS FROM t1;
Field Type Collation Null Key Default Extra Privileges Comment
c char(10) gbk_chinese_ci YES MUL NULL
INSERT INTO t1 VALUES ('aaa'),('aaaa'),('aaaaa');
SELECT c as want3results FROM t1 WHERE c LIKE 'aaa%';
want3results
aaa
aaaa
aaaaa
DROP TABLE t1;
CREATE TABLE t1 (c1 varchar(15), KEY c1 (c1(2)));
SHOW FULL COLUMNS FROM t1;
Field Type Collation Null Key Default Extra Privileges Comment
c1 varchar(15) gbk_chinese_ci YES MUL NULL
INSERT INTO t1 VALUES ('location'),('loberge'),('lotre'),('boabab');
SELECT c1 as want3results from t1 where c1 like 'l%';
want3results
location
loberge
lotre
SELECT c1 as want3results from t1 where c1 like 'lo%';
want3results
location
loberge
lotre
SELECT c1 as want1result from t1 where c1 like 'loc%';
want1result
location
SELECT c1 as want1result from t1 where c1 like 'loca%';
want1result
location
SELECT c1 as want1result from t1 where c1 like 'locat%';
want1result
location
SELECT c1 as want1result from t1 where c1 like 'locati%';
want1result
location
SELECT c1 as want1result from t1 where c1 like 'locatio%';
want1result
location
SELECT c1 as want1result from t1 where c1 like 'location%';
want1result
location
DROP TABLE t1;
create table t1 (a set('a') not null);
insert into t1 values (),();
Warnings:
Warning 1364 Field 'a' doesn't have a default value
select cast(a as char(1)) from t1;
cast(a as char(1))
select a sounds like a from t1;
a sounds like a
1
1
select 1 from t1 order by cast(a as char(1));
1
1
1
drop table t1;
set names utf8;
create table t1 (
name varchar(10),
level smallint unsigned);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`name` varchar(10) DEFAULT NULL,
`level` smallint(5) unsigned DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=gbk
insert into t1 values ('string',1);
select concat(name,space(level)), concat(name, repeat(' ',level)) from t1;
concat(name,space(level)) concat(name, repeat(' ',level))
string string
drop table t1;
DROP DATABASE d1;
USE test;
SET character_set_server= @safe_character_set_server;
SET collation_server= @safe_collation_server;
SET character_set_client= @safe_character_set_client;
SET character_set_results= @safe_character_set_results;
SET NAMES gbk;
SET collation_connection='gbk_chinese_ci';
create table t1 select repeat('a',4000) a;
delete from t1;
insert into t1 values ('a'), ('a '), ('a\t');
select collation(a),hex(a) from t1 order by a;
collation(a) hex(a)
gbk_chinese_ci 6109
gbk_chinese_ci 61
gbk_chinese_ci 6120
drop table t1;
create table t1 engine=innodb select repeat('a',50) as c1;
alter table t1 add index(c1(5));
insert into t1 values ('abcdefg'),('abcde100'),('abcde110'),('abcde111');
select collation(c1) from t1 limit 1;
collation(c1)
gbk_chinese_ci
select c1 from t1 where c1 like 'abcdef%' order by c1;
c1
abcdefg
select c1 from t1 where c1 like 'abcde1%' order by c1;
c1
abcde100
abcde110
abcde111
select c1 from t1 where c1 like 'abcde11%' order by c1;
c1
abcde110
abcde111
select c1 from t1 where c1 like 'abcde111%' order by c1;
c1
abcde111
drop table t1;
select @@collation_connection;
@@collation_connection
gbk_chinese_ci
create table t1 ROW_FORMAT=DYNAMIC select repeat('a',50) as c1 ;
insert into t1 values('abcdef');
insert into t1 values('_bcdef');
insert into t1 values('a_cdef');
insert into t1 values('ab_def');
insert into t1 values('abc_ef');
insert into t1 values('abcd_f');
insert into t1 values('abcde_');
select c1 as c1u from t1 where c1 like 'ab\_def';
c1u
ab_def
select c1 as c2h from t1 where c1 like 'ab#_def' escape '#';
c2h
ab_def
drop table t1;
CREATE TABLE t1 AS
SELECT 10 AS a, REPEAT('a',20) AS b, REPEAT('a',8) AS c, REPEAT('a',8) AS d;
ALTER TABLE t1 ADD PRIMARY KEY(a), ADD KEY(b);
INSERT INTO t1 (a, b) VALUES (1, repeat(0xF1F2,5));
INSERT INTO t1 (a, b) VALUES (2, repeat(0xF1F2,10));
INSERT INTO t1 (a, b) VALUES (3, repeat(0xF1F2,11));
INSERT INTO t1 (a, b) VALUES (4, repeat(0xF1F2,12));
SELECT hex(concat(repeat(0xF1F2, 10), '%'));
hex(concat(repeat(0xF1F2, 10), '%'))
F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F225
3 rows expected
SELECT a, hex(b), c FROM t1 WHERE b LIKE concat(repeat(0xF1F2,10), '%');
a hex(b) c
2 F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2
3 F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2
4 F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2
DROP TABLE t1;
SET collation_connection='gbk_bin';
create table t1 select repeat('a',4000) a;
delete from t1;
insert into t1 values ('a'), ('a '), ('a\t');
select collation(a),hex(a) from t1 order by a;
collation(a) hex(a)
gbk_bin 6109
gbk_bin 61
gbk_bin 6120
drop table t1;
create table t1 engine=innodb select repeat('a',50) as c1;
alter table t1 add index(c1(5));
insert into t1 values ('abcdefg'),('abcde100'),('abcde110'),('abcde111');
select collation(c1) from t1 limit 1;
collation(c1)
gbk_bin
select c1 from t1 where c1 like 'abcdef%' order by c1;
c1
abcdefg
select c1 from t1 where c1 like 'abcde1%' order by c1;
c1
abcde100
abcde110
abcde111
select c1 from t1 where c1 like 'abcde11%' order by c1;
c1
abcde110
abcde111
select c1 from t1 where c1 like 'abcde111%' order by c1;
c1
abcde111
drop table t1;
select @@collation_connection;
@@collation_connection
gbk_bin
create table t1 ROW_FORMAT=DYNAMIC select repeat('a',50) as c1 ;
insert into t1 values('abcdef');
insert into t1 values('_bcdef');
insert into t1 values('a_cdef');
insert into t1 values('ab_def');
insert into t1 values('abc_ef');
insert into t1 values('abcd_f');
insert into t1 values('abcde_');
select c1 as c1u from t1 where c1 like 'ab\_def';
c1u
ab_def
select c1 as c2h from t1 where c1 like 'ab#_def' escape '#';
c2h
ab_def
drop table t1;
CREATE TABLE t1 AS
SELECT 10 AS a, REPEAT('a',20) AS b, REPEAT('a',8) AS c, REPEAT('a',8) AS d;
ALTER TABLE t1 ADD PRIMARY KEY(a), ADD KEY(b);
INSERT INTO t1 (a, b) VALUES (1, repeat(0xF1F2,5));
INSERT INTO t1 (a, b) VALUES (2, repeat(0xF1F2,10));
INSERT INTO t1 (a, b) VALUES (3, repeat(0xF1F2,11));
INSERT INTO t1 (a, b) VALUES (4, repeat(0xF1F2,12));
SELECT hex(concat(repeat(0xF1F2, 10), '%'));
hex(concat(repeat(0xF1F2, 10), '%'))
F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F225
3 rows expected
SELECT a, hex(b), c FROM t1 WHERE b LIKE concat(repeat(0xF1F2,10), '%');
a hex(b) c
2 F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2
3 F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2
4 F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2F1F2
DROP TABLE t1;
SET NAMES gbk;
CREATE TABLE t1 (a text) character set gbk;
INSERT INTO t1 VALUES (0xA3A0),(0xA1A1);
SELECT hex(a) FROM t1 ORDER BY a;
hex(a)
A1A1
A3A0
DROP TABLE t1;
select hex(convert(_gbk 0xA14041 using ucs2));
hex(convert(_gbk 0xA14041 using ucs2))
003F0041
create table t1 (c1 text not null, c2 text not null) character set gbk;
alter table t1 change c1 c1 mediumtext character set gbk not null;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c1` mediumtext NOT NULL,
`c2` text NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=gbk
drop table t1;
CREATE TABLE t1(a MEDIUMTEXT CHARACTER SET gbk,
b MEDIUMTEXT CHARACTER SET big5);
INSERT INTO t1 VALUES
(REPEAT(0x1125,200000), REPEAT(0x1125,200000)), ('', ''), ('', '');
SELECT a FROM t1 GROUP BY 1 LIMIT 1 INTO @nullll;
SELECT b FROM t1 GROUP BY 1 LIMIT 1 INTO @nullll;
DROP TABLES t1;
End of 5.0 tests
|