24
24
alter table t1 add c int not null, add key (c,a);
26
create temporary table t1 (a int not null,b int not null, primary key (a)) engine=memory comment="testing heaps";
26
create table t1 (a int not null,b int not null, primary key (a)) engine=memory comment="testing heaps";
27
27
insert into t1 values(1,1),(2,2),(3,3),(4,4);
28
28
delete from t1 where a > 0;
32
create temporary table t1 (a int not null,b int not null, primary key (a)) engine=MEMORY comment="testing heaps";
32
create table t1 (a int not null,b int not null, primary key (a)) engine=heap comment="testing heaps";
33
33
insert into t1 values(1,1),(2,2),(3,3),(4,4);
34
alter table t1 modify a int not null auto_increment, engine=innodb, comment="new innodb table";
34
alter table t1 modify a int not null auto_increment, engine=myisam, comment="new myisam table";
66
create temporary table t2 SELECT * FROM t1;
67
explain select * from t2 where a in (869751,736494,226312,802616);
66
alter table t1 engine=myisam;
67
explain select * from t1 where a in (869751,736494,226312,802616);
68
68
id select_type table type possible_keys key key_len ref rows Extra
69
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using where
71
create temporary table t1 (x int not null, y int not null, key x (x), unique y (y))
69
1 SIMPLE t1 range uniq_id uniq_id 4 NULL 4 Using where; Using index
71
create table t1 (x int not null, y int not null, key x (x), unique y (y))
73
73
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
74
74
select * from t1 where x=1;
78
78
select * from t1,t1 as t2 where t1.x=t2.y;
79
ERROR HY000: Can't reopen table: 't1'
80
86
explain select * from t1,t1 as t2 where t1.x=t2.y;
81
ERROR HY000: Can't reopen table: 't1'
87
id select_type table type possible_keys key key_len ref rows Extra
88
1 SIMPLE t1 ALL x NULL NULL NULL 6
89
1 SIMPLE t2 eq_ref y y 4 test.t1.x 1
83
create temporary table t1 (a int) engine=MEMORY;
91
create table t1 (a int) engine=heap;
84
92
insert into t1 values(1);
85
93
select max(a) from t1;
89
CREATE TEMPORARY TABLE t1 ( a int not null default 0, b int not null default 0, key(a), key(b) ) ENGINE=MEMORY;
97
CREATE TABLE t1 ( a int not null default 0, b int not null default 0, key(a), key(b) ) ENGINE=HEAP;
90
98
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
91
99
select * from t1 where a=1;
124
132
replace into t1 values(1);
126
create temporary table t1 (n int) engine=MEMORY;
134
create table t1 (n int) engine=heap;
128
create temporary table t1 (n int) engine=MEMORY;
136
create table t1 (n int) engine=heap;
129
137
drop table if exists t1;
130
CREATE TEMPORARY table t1(f1 int not null,f2 char(20) not
131
null,index(f2)) engine=MEMORY;
138
CREATE table t1(f1 int not null,f2 char(20) not
139
null,index(f2)) engine=heap;
132
140
INSERT into t1 set f1=12,f2="bill";
133
141
INSERT into t1 set f1=13,f2="bill";
134
142
INSERT into t1 set f1=14,f2="bill";
161
169
1 SIMPLE t1 ALL btn NULL NULL NULL 14 Using where
162
170
explain select * from t1 where btn="a" and new_col="a";
163
171
id select_type table type possible_keys key key_len ref rows Extra
164
1 SIMPLE t1 ref btn btn 48 const,const 2 Using where
172
1 SIMPLE t1 ref btn btn 11 const,const 2 Using where
166
CREATE TEMPORARY TABLE t1 (
167
175
a int default NULL,
168
176
b int default NULL,
172
180
INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
173
181
SELECT * FROM t1 WHERE a=NULL;
206
CREATE TEMPORARY TABLE t1 (a int not null, primary key(a)) engine=MEMORY;
214
CREATE TABLE t1 (a int not null, primary key(a)) engine=heap;
207
215
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
208
216
DELETE from t1 where a < 100;
209
217
SELECT * from t1;
212
CREATE TEMPORARY TABLE `job_titles` (
213
`job_title_id` int NOT NULL default '0',
220
CREATE TABLE `job_titles` (
221
`job_title_id` int(6) unsigned NOT NULL default '0',
214
222
`job_title` char(18) NOT NULL default '',
215
223
PRIMARY KEY (`job_title_id`),
216
224
UNIQUE KEY `job_title_id` (`job_title_id`,`job_title`)
218
226
SELECT MAX(job_title_id) FROM job_titles;
219
227
MAX(job_title_id)
221
229
DROP TABLE job_titles;
222
CREATE TEMPORARY TABLE t1 (a INT NOT NULL, B INT, KEY(B)) ENGINE=MEMORY;
230
CREATE TABLE t1 (a INT NOT NULL, B INT, KEY(B)) ENGINE=HEAP;
223
231
INSERT INTO t1 VALUES(1,1), (1,NULL);
224
232
SELECT * FROM t1 WHERE B is not null;
228
CREATE TEMPORARY TABLE t1 (pseudo char(35) PRIMARY KEY, date int NOT NULL) ENGINE=MEMORY;
236
CREATE TABLE t1 (pseudo char(35) PRIMARY KEY, date int(10) unsigned NOT NULL) ENGINE=HEAP;
229
237
INSERT INTO t1 VALUES ('massecot',1101106491),('altec',1101106492),('stitch+',1101106304),('Seb Corgan',1101106305),('beerfilou',1101106263),('flaker',1101106529),('joce8',5),('M4vrick',1101106418),('gabay008',1101106525),('Vamp irX',1101106291),('ZoomZip',1101106546),('rip666',1101106502),('CBP ',1101106397),('guezpard',1101106496);
230
238
DELETE FROM t1 WHERE date<1101106546;
231
239
SELECT * FROM t1;
233
241
ZoomZip 1101106546
235
create temporary table t1(a char(2)) engine=memory;
243
create table t1(a char(2)) engine=memory;
236
244
insert into t1 values (NULL), (NULL);
237
245
delete from t1 where a is null;
238
246
insert into t1 values ('2'), ('3');
251
259
Note 1265 Data truncated for column 'c' at row 1
252
260
select concat('*',v,'*',c,'*',t,'*') from t1;
253
261
concat('*',v,'*',c,'*',t,'*')
256
264
show create table t1;
257
265
Table Create Table
258
t1 CREATE TEMPORARY TABLE `t1` (
266
t1 CREATE TABLE `t1` (
259
267
`v` varchar(10) DEFAULT NULL,
260
`c` varchar(10) DEFAULT NULL,
268
`c` char(10) DEFAULT NULL,
261
269
`t` varchar(50) DEFAULT NULL
263
create temporary table t2 like t1;
270
) ENGINE=MEMORY DEFAULT CHARSET=latin1
271
create table t2 like t1;
264
272
show create table t2;
265
273
Table Create Table
266
t2 CREATE TEMPORARY TABLE `t2` (
274
t2 CREATE TABLE `t2` (
267
275
`v` varchar(10) DEFAULT NULL,
268
`c` varchar(10) DEFAULT NULL,
276
`c` char(10) DEFAULT NULL,
269
277
`t` varchar(50) DEFAULT NULL
271
create temporary table t3 select * from t1;
278
) ENGINE=MEMORY DEFAULT CHARSET=latin1
279
create table t3 select * from t1;
272
280
show create table t3;
273
281
Table Create Table
274
t3 CREATE TEMPORARY TABLE `t3` (
282
t3 CREATE TABLE `t3` (
275
283
`v` varchar(10) DEFAULT NULL,
276
`c` varchar(10) DEFAULT NULL,
284
`c` char(10) DEFAULT NULL,
277
285
`t` varchar(50) DEFAULT NULL
286
) ENGINE=MEMORY DEFAULT CHARSET=latin1
279
287
alter table t1 modify c varchar(10);
280
288
show create table t1;
281
289
Table Create Table
282
t1 CREATE TEMPORARY TABLE `t1` (
290
t1 CREATE TABLE `t1` (
283
291
`v` varchar(10) DEFAULT NULL,
284
292
`c` varchar(10) DEFAULT NULL,
285
293
`t` varchar(50) DEFAULT NULL
294
) ENGINE=MEMORY DEFAULT CHARSET=latin1
287
295
alter table t1 modify v char(10);
288
296
show create table t1;
289
297
Table Create Table
290
t1 CREATE TEMPORARY TABLE `t1` (
291
`v` varchar(10) DEFAULT NULL,
298
t1 CREATE TABLE `t1` (
299
`v` char(10) DEFAULT NULL,
292
300
`c` varchar(10) DEFAULT NULL,
293
301
`t` varchar(50) DEFAULT NULL
295
alter table t1 modify t varchar(50);
302
) ENGINE=MEMORY DEFAULT CHARSET=latin1
303
alter table t1 modify t varchar(10);
305
Warning 1265 Data truncated for column 't' at row 2
296
306
show create table t1;
297
307
Table Create Table
298
t1 CREATE TEMPORARY TABLE `t1` (
299
`v` varchar(10) DEFAULT NULL,
308
t1 CREATE TABLE `t1` (
309
`v` char(10) DEFAULT NULL,
300
310
`c` varchar(10) DEFAULT NULL,
301
`t` varchar(50) DEFAULT NULL
311
`t` varchar(10) DEFAULT NULL
312
) ENGINE=MEMORY DEFAULT CHARSET=latin1
303
313
select concat('*',v,'*',c,'*',t,'*') from t1;
304
314
concat('*',v,'*',c,'*',t,'*')
307
317
drop table t1,t2,t3;
308
create temporary table t1 (v varchar(10), c char(10), t varchar(50), key(v), key(c), key(t(10)));
318
create table t1 (v varchar(10), c char(10), t varchar(50), key(v), key(c), key(t(10)));
309
319
show create table t1;
310
320
Table Create Table
311
t1 CREATE TEMPORARY TABLE `t1` (
321
t1 CREATE TABLE `t1` (
312
322
`v` varchar(10) DEFAULT NULL,
313
`c` varchar(10) DEFAULT NULL,
323
`c` char(10) DEFAULT NULL,
314
324
`t` varchar(50) DEFAULT NULL,
317
327
KEY `t` (`t`(10))
328
) ENGINE=MEMORY DEFAULT CHARSET=latin1
319
329
select count(*) from t1;
359
369
explain select count(*) from t1 where v='a ';
360
370
id select_type table type possible_keys key key_len ref rows Extra
361
1 SIMPLE t1 ref v v 43 const 10 Using where
371
1 SIMPLE t1 ref v v 13 const 10 Using where
362
372
explain select count(*) from t1 where c='a ';
363
373
id select_type table type possible_keys key key_len ref rows Extra
364
1 SIMPLE t1 ref c c 43 const 10 Using where
374
1 SIMPLE t1 ref c c 11 const 10 Using where
365
375
explain select count(*) from t1 where t='a ';
366
376
id select_type table type possible_keys key key_len ref rows Extra
367
1 SIMPLE t1 ref t t 43 const 10 Using where
377
1 SIMPLE t1 ref t t 13 const 10 Using where
368
378
explain select count(*) from t1 where v like 'a%';
369
379
id select_type table type possible_keys key key_len ref rows Extra
370
380
1 SIMPLE t1 ALL v NULL NULL NULL 271 Using where
371
381
explain select count(*) from t1 where v between 'a' and 'a ';
372
382
id select_type table type possible_keys key key_len ref rows Extra
373
1 SIMPLE t1 ref v v 43 const 10 Using where
383
1 SIMPLE t1 ref v v 13 const 10 Using where
374
384
explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
375
385
id select_type table type possible_keys key key_len ref rows Extra
376
1 SIMPLE t1 ref v v 43 const 10 Using where
386
1 SIMPLE t1 ref v v 13 const 10 Using where
377
387
alter table t1 add unique(v);
378
388
ERROR 23000: Duplicate entry '{ ' for key 'v_2'
379
389
select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a' order by length(concat('*',v,'*',c,'*',t,'*'));
391
401
explain select * from t1 where v='a';
392
402
id select_type table type possible_keys key key_len ref rows Extra
393
1 SIMPLE t1 ref v v 43 const 10 Using where
403
1 SIMPLE t1 ref v v 13 const 10 Using where
394
404
select v,count(*) from t1 group by v limit 10;
528
550
update t1 set a='a ' where a like 'a ';
529
551
update t1 set a='a ' where a like 'a ';
531
create temporary table t1 (v varchar(10), c char(10), t varchar(50), key using btree (v), key using btree (c), key using btree (t(10)));
553
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)));
532
554
show create table t1;
533
555
Table Create Table
534
t1 CREATE TEMPORARY TABLE `t1` (
556
t1 CREATE TABLE `t1` (
535
557
`v` varchar(10) DEFAULT NULL,
536
`c` varchar(10) DEFAULT NULL,
558
`c` char(10) DEFAULT NULL,
537
559
`t` varchar(50) DEFAULT NULL,
538
560
KEY `v` (`v`) USING BTREE,
539
561
KEY `c` (`c`) USING BTREE,
540
562
KEY `t` (`t`(10)) USING BTREE
563
) ENGINE=MEMORY DEFAULT CHARSET=latin1
542
564
select count(*) from t1;
570
592
explain select count(*) from t1 where v='a ';
571
593
id select_type table type possible_keys key key_len ref rows Extra
572
1 SIMPLE t1 ref v v 43 const # Using where
594
1 SIMPLE t1 ref v v 13 const # Using where
573
595
explain select count(*) from t1 where c='a ';
574
596
id select_type table type possible_keys key key_len ref rows Extra
575
1 SIMPLE t1 ref c c 43 const # Using where
597
1 SIMPLE t1 ref c c 11 const # Using where
576
598
explain select count(*) from t1 where t='a ';
577
599
id select_type table type possible_keys key key_len ref rows Extra
578
1 SIMPLE t1 ref t t 43 const # Using where
600
1 SIMPLE t1 ref t t 13 const # Using where
579
601
explain select count(*) from t1 where v like 'a%';
580
602
id select_type table type possible_keys key key_len ref rows Extra
581
1 SIMPLE t1 range v v 43 NULL # Using where
603
1 SIMPLE t1 range v v 13 NULL # Using where
582
604
explain select count(*) from t1 where v between 'a' and 'a ';
583
605
id select_type table type possible_keys key key_len ref rows Extra
584
1 SIMPLE t1 ref v v 43 const # Using where
606
1 SIMPLE t1 ref v v 13 const # Using where
585
607
explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
586
608
id select_type table type possible_keys key key_len ref rows Extra
587
1 SIMPLE t1 ref v v 43 const # Using where
609
1 SIMPLE t1 ref v v 13 const # Using where
588
610
alter table t1 add unique(v);
589
611
ERROR 23000: Duplicate entry '{ ' for key 'v_2'
590
612
select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a' order by length(concat('*',v,'*',c,'*',t,'*'));
602
624
explain select * from t1 where v='a';
603
625
id select_type table type possible_keys key key_len ref rows Extra
604
1 SIMPLE t1 ref v v 43 const # Using where
626
1 SIMPLE t1 ref v v 13 const # Using where
606
create temporary table t1 (a char(10), unique using btree (a)) engine=MEMORY;
628
create table t1 (a char(10), unique using btree (a)) engine=heap;
607
629
insert into t1 values ('a');
608
630
insert into t1 values ('a ');
609
ERROR 23000: Duplicate entry 'a ' for key 'a'
631
ERROR 23000: Duplicate entry 'a' for key 'a'
610
632
alter table t1 modify a varchar(10);
611
633
insert into t1 values ('a '),('a '),('a '),('a ');
612
634
ERROR 23000: Duplicate entry 'a ' for key 'a'
619
641
update t1 set a='a ' where a like 'a ';
620
642
update t1 set a='a ' where a like 'a ';
622
create temporary table t1 (v varchar(10), c char(10), t varchar(50), key(v(5)), key(c(5)), key(t(5)));
644
create table t1 (v varchar(10), c char(10), t varchar(50), key(v(5)), key(c(5)), key(t(5)));
623
645
show create table t1;
624
646
Table Create Table
625
t1 CREATE TEMPORARY TABLE `t1` (
647
t1 CREATE TABLE `t1` (
626
648
`v` varchar(10) DEFAULT NULL,
627
`c` varchar(10) DEFAULT NULL,
649
`c` char(10) DEFAULT NULL,
628
650
`t` varchar(50) DEFAULT NULL,
629
651
KEY `v` (`v`(5)),
630
652
KEY `c` (`c`(5)),
654
) ENGINE=MEMORY DEFAULT CHARSET=latin1
634
create temporary table t1 (v varchar(16383), key(v(10)));
656
create table t1 (v varchar(65530), key(v(10)));
635
657
show create table t1;
636
658
Table Create Table
637
t1 CREATE TEMPORARY TABLE `t1` (
638
`v` varchar(16383) DEFAULT NULL,
659
t1 CREATE TABLE `t1` (
660
`v` varchar(65530) DEFAULT NULL,
639
661
KEY `v` (`v`(10))
641
insert into t1 values(repeat('a',16383));
642
select length(v) from t1 where v=repeat('a',16383);
662
) ENGINE=MEMORY DEFAULT CHARSET=latin1
663
insert into t1 values(repeat('a',65530));
664
select length(v) from t1 where v=repeat('a',65530);
646
set storage_engine=InnoDB;
647
create temporary table t1 (a bigint auto_increment primary key, b int,
648
key (b, a)) engine=MEMORY;
668
set storage_engine=MyISAM;
669
create table t1 (a bigint unsigned auto_increment primary key, b int,
670
key (b, a)) engine=heap;
649
671
insert t1 (b) values (1),(1),(1),(1),(1),(1),(1),(1);
650
672
select * from t1;
675
create temporary table t1 (a int not null, b int not null auto_increment,
676
primary key(a, b)) engine=MEMORY;
697
create table t1 (a int not null, b int not null auto_increment,
698
primary key(a, b)) engine=heap;
677
699
ERROR 42000: Incorrect table definition; there can be only one auto column and it must be defined as a key
678
create temporary table t1 (c char(255), primary key(c(90)));
700
create table t1 (c char(255), primary key(c(90)));
679
701
insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
680
702
insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
681
703
ERROR 23000: Duplicate entry 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl' for key 'PRIMARY'
683
CREATE TEMPORARY TABLE t1 (a int, key(a)) engine=MEMORY;
705
CREATE TABLE t1 (a int, key(a)) engine=heap;
684
706
insert into t1 values (0);
686
708
select * from t1;
693
create temporary table t1 (c char(10)) engine=memory;
694
create temporary table t2 (c varchar(10)) engine=memory;
715
create table t1 (c char(10)) engine=memory;
716
create table t2 (c varchar(10)) engine=memory;
695
717
show table status like 't_';
696
718
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
719
t1 MEMORY 10 Fixed 0 11 0 # 0 0 NULL NULL NULL NULL latin1_swedish_ci NULL
720
t2 MEMORY 10 Fixed 0 12 0 # 0 0 NULL NULL NULL NULL latin1_swedish_ci NULL
697
721
drop table t1, t2;
698
CREATE TEMPORARY TABLE t1(a VARCHAR(1), b VARCHAR(2), c VARCHAR(256),
722
CREATE TABLE t1(a VARCHAR(1), b VARCHAR(2), c VARCHAR(256),
699
723
KEY(a), KEY(b), KEY(c)) ENGINE=MEMORY;
700
724
INSERT INTO t1 VALUES('a','aa',REPEAT('a', 256)),('a','aa',REPEAT('a',256));
701
725
SELECT COUNT(*) FROM t1 WHERE a='a';