myisam.result 67.8 KB
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drop table if exists t1,t2;
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SET SQL_WARNINGS=1;
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CREATE TABLE t1 (
STRING_DATA char(255) default NULL,
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KEY string_data (STRING_DATA)
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) ENGINE=MyISAM;
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INSERT INTO t1 VALUES ('AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA');
INSERT INTO t1 VALUES ('DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD');
INSERT INTO t1 VALUES ('FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF');
INSERT INTO t1 VALUES ('FGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG');
INSERT INTO t1 VALUES ('HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH');
INSERT INTO t1 VALUES ('WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW');
CHECK TABLE t1;
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Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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drop table t1;
create table t1 (a tinyint not null auto_increment, b blob not null, primary key (a));
check table t1;
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Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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repair table t1;
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Table	Op	Msg_type	Msg_text
test.t1	repair	status	OK
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delete from t1 where (a & 1);
check table t1;
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Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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repair table t1;
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Table	Op	Msg_type	Msg_text
test.t1	repair	status	OK
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check table t1;
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Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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drop table t1;
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create table t1 (a int not null auto_increment, b int not null, primary key (a), index(b));
insert into t1 (b) values (1),(2),(2),(2),(2);
optimize table t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
show index from t1;
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Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	0	PRIMARY	1	a	A	5	NULL	NULL		BTREE	
t1	1	b	1	b	A	1	NULL	NULL		BTREE	
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optimize table t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	Table is already up to date
show index from t1;
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Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	0	PRIMARY	1	a	A	5	NULL	NULL		BTREE	
t1	1	b	1	b	A	1	NULL	NULL		BTREE	
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drop table t1;
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create table t1 (a int not null, b int not null, c int not null, primary key (a),key(b)) engine=myisam;
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insert into t1 values (3,3,3),(1,1,1),(2,2,2),(4,4,4);
explain select * from t1 order by 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	NULL	NULL	NULL	NULL	4	Using filesort
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explain select * from t1 order by b;
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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	4	Using filesort
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explain select * from t1 order by c;
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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	4	Using filesort
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explain select a from t1 order by 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	index	NULL	PRIMARY	4	NULL	4	Using index
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explain select b from t1 order by b;
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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	b	4	NULL	4	Using index
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explain select a,b from t1 order by b;
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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	4	Using filesort
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explain select a,b from t1;
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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	4	
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explain select a,b,c from t1;
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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	4	
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drop table t1;
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CREATE TABLE t1 (a INT);
INSERT INTO  t1 VALUES (1), (2), (3);
LOCK TABLES t1 WRITE;
INSERT INTO  t1 VALUES (1), (2), (3);
OPTIMIZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
DROP TABLE t1;
create table t1 ( t1 char(255), key(t1(250)));
insert t1 values ('137513751375137513751375137513751375137569516951695169516951695169516951695169');
insert t1 values ('178417841784178417841784178417841784178403420342034203420342034203420342034203');
insert t1 values ('213872387238723872387238723872387238723867376737673767376737673767376737673767');
insert t1 values ('242624262426242624262426242624262426242607890789078907890789078907890789078907');
insert t1 values ('256025602560256025602560256025602560256011701170117011701170117011701170117011');
insert t1 values ('276027602760276027602760276027602760276001610161016101610161016101610161016101');
insert t1 values ('281528152815281528152815281528152815281564956495649564956495649564956495649564');
insert t1 values ('292129212921292129212921292129212921292102100210021002100210021002100210021002');
insert t1 values ('380638063806380638063806380638063806380634483448344834483448344834483448344834');
insert t1 values ('411641164116411641164116411641164116411616301630163016301630163016301630163016');
insert t1 values ('420842084208420842084208420842084208420899889988998899889988998899889988998899');
insert t1 values ('438443844384438443844384438443844384438482448244824482448244824482448244824482');
insert t1 values ('443244324432443244324432443244324432443239613961396139613961396139613961396139');
insert t1 values ('485448544854485448544854485448544854485477847784778477847784778477847784778477');
insert t1 values ('494549454945494549454945494549454945494555275527552755275527552755275527552755');
insert t1 values ('538647864786478647864786478647864786478688918891889188918891889188918891889188');
insert t1 values ('565556555655565556555655565556555655565554845484548454845484548454845484548454');
insert t1 values ('607860786078607860786078607860786078607856665666566656665666566656665666566656');
insert t1 values ('640164016401640164016401640164016401640141274127412741274127412741274127412741');
insert t1 values ('719471947194719471947194719471947194719478717871787178717871787178717871787178');
insert t1 values ('742574257425742574257425742574257425742549604960496049604960496049604960496049');
insert t1 values ('887088708870887088708870887088708870887035963596359635963596359635963596359635');
insert t1 values ('917791779177917791779177917791779177917773857385738573857385738573857385738573');
insert t1 values ('933293329332933293329332933293329332933278987898789878987898789878987898789878');
insert t1 values ('963896389638963896389638963896389638963877807780778077807780778077807780778077');
delete from t1 where t1>'2';
insert t1 values ('70'), ('84'), ('60'), ('20'), ('76'), ('89'), ('49'), ('50'),
('88'), ('61'), ('42'), ('98'), ('39'), ('30'), ('25'), ('66'), ('61'), ('48'),
('80'), ('84'), ('98'), ('19'), ('91'), ('42'), ('47');
optimize table t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
drop table t1;
create table t1 (i1 int, i2 int, i3 int, i4 int, i5 int, i6 int, i7 int, i8
int, i9 int, i10 int, i11 int, i12 int, i13 int, i14 int, i15 int, i16 int, i17
int, i18 int, i19 int, i20 int, i21 int, i22 int, i23 int, i24 int, i25 int,
i26 int, i27 int, i28 int, i29 int, i30 int, i31 int, i32 int, i33 int, i34
int, i35 int, i36 int, i37 int, i38 int, i39 int, i40 int, i41 int, i42 int,
i43 int, i44 int, i45 int, i46 int, i47 int, i48 int, i49 int, i50 int, i51
int, i52 int, i53 int, i54 int, i55 int, i56 int, i57 int, i58 int, i59 int,
i60 int, i61 int, i62 int, i63 int, i64 int, i65 int, i66 int, i67 int, i68
int, i69 int, i70 int, i71 int, i72 int, i73 int, i74 int, i75 int, i76 int,
i77 int, i78 int, i79 int, i80 int, i81 int, i82 int, i83 int, i84 int, i85
int, i86 int, i87 int, i88 int, i89 int, i90 int, i91 int, i92 int, i93 int,
i94 int, i95 int, i96 int, i97 int, i98 int, i99 int, i100 int, i101 int, i102
int, i103 int, i104 int, i105 int, i106 int, i107 int, i108 int, i109 int, i110
int, i111 int, i112 int, i113 int, i114 int, i115 int, i116 int, i117 int, i118
int, i119 int, i120 int, i121 int, i122 int, i123 int, i124 int, i125 int, i126
int, i127 int, i128 int, i129 int, i130 int, i131 int, i132 int, i133 int, i134
int, i135 int, i136 int, i137 int, i138 int, i139 int, i140 int, i141 int, i142
int, i143 int, i144 int, i145 int, i146 int, i147 int, i148 int, i149 int, i150
int, i151 int, i152 int, i153 int, i154 int, i155 int, i156 int, i157 int, i158
int, i159 int, i160 int, i161 int, i162 int, i163 int, i164 int, i165 int, i166
int, i167 int, i168 int, i169 int, i170 int, i171 int, i172 int, i173 int, i174
int, i175 int, i176 int, i177 int, i178 int, i179 int, i180 int, i181 int, i182
int, i183 int, i184 int, i185 int, i186 int, i187 int, i188 int, i189 int, i190
int, i191 int, i192 int, i193 int, i194 int, i195 int, i196 int, i197 int, i198
int, i199 int, i200 int, i201 int, i202 int, i203 int, i204 int, i205 int, i206
int, i207 int, i208 int, i209 int, i210 int, i211 int, i212 int, i213 int, i214
int, i215 int, i216 int, i217 int, i218 int, i219 int, i220 int, i221 int, i222
int, i223 int, i224 int, i225 int, i226 int, i227 int, i228 int, i229 int, i230
int, i231 int, i232 int, i233 int, i234 int, i235 int, i236 int, i237 int, i238
int, i239 int, i240 int, i241 int, i242 int, i243 int, i244 int, i245 int, i246
int, i247 int, i248 int, i249 int, i250 int, i251 int, i252 int, i253 int, i254
int, i255 int, i256 int, i257 int, i258 int, i259 int, i260 int, i261 int, i262
int, i263 int, i264 int, i265 int, i266 int, i267 int, i268 int, i269 int, i270
int, i271 int, i272 int, i273 int, i274 int, i275 int, i276 int, i277 int, i278
int, i279 int, i280 int, i281 int, i282 int, i283 int, i284 int, i285 int, i286
int, i287 int, i288 int, i289 int, i290 int, i291 int, i292 int, i293 int, i294
int, i295 int, i296 int, i297 int, i298 int, i299 int, i300 int, i301 int, i302
int, i303 int, i304 int, i305 int, i306 int, i307 int, i308 int, i309 int, i310
int, i311 int, i312 int, i313 int, i314 int, i315 int, i316 int, i317 int, i318
int, i319 int, i320 int, i321 int, i322 int, i323 int, i324 int, i325 int, i326
int, i327 int, i328 int, i329 int, i330 int, i331 int, i332 int, i333 int, i334
int, i335 int, i336 int, i337 int, i338 int, i339 int, i340 int, i341 int, i342
int, i343 int, i344 int, i345 int, i346 int, i347 int, i348 int, i349 int, i350
int, i351 int, i352 int, i353 int, i354 int, i355 int, i356 int, i357 int, i358
int, i359 int, i360 int, i361 int, i362 int, i363 int, i364 int, i365 int, i366
int, i367 int, i368 int, i369 int, i370 int, i371 int, i372 int, i373 int, i374
int, i375 int, i376 int, i377 int, i378 int, i379 int, i380 int, i381 int, i382
int, i383 int, i384 int, i385 int, i386 int, i387 int, i388 int, i389 int, i390
int, i391 int, i392 int, i393 int, i394 int, i395 int, i396 int, i397 int, i398
int, i399 int, i400 int, i401 int, i402 int, i403 int, i404 int, i405 int, i406
int, i407 int, i408 int, i409 int, i410 int, i411 int, i412 int, i413 int, i414
int, i415 int, i416 int, i417 int, i418 int, i419 int, i420 int, i421 int, i422
int, i423 int, i424 int, i425 int, i426 int, i427 int, i428 int, i429 int, i430
int, i431 int, i432 int, i433 int, i434 int, i435 int, i436 int, i437 int, i438
int, i439 int, i440 int, i441 int, i442 int, i443 int, i444 int, i445 int, i446
int, i447 int, i448 int, i449 int, i450 int, i451 int, i452 int, i453 int, i454
int, i455 int, i456 int, i457 int, i458 int, i459 int, i460 int, i461 int, i462
int, i463 int, i464 int, i465 int, i466 int, i467 int, i468 int, i469 int, i470
int, i471 int, i472 int, i473 int, i474 int, i475 int, i476 int, i477 int, i478
int, i479 int, i480 int, i481 int, i482 int, i483 int, i484 int, i485 int, i486
int, i487 int, i488 int, i489 int, i490 int, i491 int, i492 int, i493 int, i494
int, i495 int, i496 int, i497 int, i498 int, i499 int, i500 int, i501 int, i502
int, i503 int, i504 int, i505 int, i506 int, i507 int, i508 int, i509 int, i510
int, i511 int, i512 int, i513 int, i514 int, i515 int, i516 int, i517 int, i518
int, i519 int, i520 int, i521 int, i522 int, i523 int, i524 int, i525 int, i526
int, i527 int, i528 int, i529 int, i530 int, i531 int, i532 int, i533 int, i534
int, i535 int, i536 int, i537 int, i538 int, i539 int, i540 int, i541 int, i542
int, i543 int, i544 int, i545 int, i546 int, i547 int, i548 int, i549 int, i550
int, i551 int, i552 int, i553 int, i554 int, i555 int, i556 int, i557 int, i558
int, i559 int, i560 int, i561 int, i562 int, i563 int, i564 int, i565 int, i566
int, i567 int, i568 int, i569 int, i570 int, i571 int, i572 int, i573 int, i574
int, i575 int, i576 int, i577 int, i578 int, i579 int, i580 int, i581 int, i582
int, i583 int, i584 int, i585 int, i586 int, i587 int, i588 int, i589 int, i590
int, i591 int, i592 int, i593 int, i594 int, i595 int, i596 int, i597 int, i598
int, i599 int, i600 int, i601 int, i602 int, i603 int, i604 int, i605 int, i606
int, i607 int, i608 int, i609 int, i610 int, i611 int, i612 int, i613 int, i614
int, i615 int, i616 int, i617 int, i618 int, i619 int, i620 int, i621 int, i622
int, i623 int, i624 int, i625 int, i626 int, i627 int, i628 int, i629 int, i630
int, i631 int, i632 int, i633 int, i634 int, i635 int, i636 int, i637 int, i638
int, i639 int, i640 int, i641 int, i642 int, i643 int, i644 int, i645 int, i646
int, i647 int, i648 int, i649 int, i650 int, i651 int, i652 int, i653 int, i654
int, i655 int, i656 int, i657 int, i658 int, i659 int, i660 int, i661 int, i662
int, i663 int, i664 int, i665 int, i666 int, i667 int, i668 int, i669 int, i670
int, i671 int, i672 int, i673 int, i674 int, i675 int, i676 int, i677 int, i678
int, i679 int, i680 int, i681 int, i682 int, i683 int, i684 int, i685 int, i686
int, i687 int, i688 int, i689 int, i690 int, i691 int, i692 int, i693 int, i694
int, i695 int, i696 int, i697 int, i698 int, i699 int, i700 int, i701 int, i702
int, i703 int, i704 int, i705 int, i706 int, i707 int, i708 int, i709 int, i710
int, i711 int, i712 int, i713 int, i714 int, i715 int, i716 int, i717 int, i718
int, i719 int, i720 int, i721 int, i722 int, i723 int, i724 int, i725 int, i726
int, i727 int, i728 int, i729 int, i730 int, i731 int, i732 int, i733 int, i734
int, i735 int, i736 int, i737 int, i738 int, i739 int, i740 int, i741 int, i742
int, i743 int, i744 int, i745 int, i746 int, i747 int, i748 int, i749 int, i750
int, i751 int, i752 int, i753 int, i754 int, i755 int, i756 int, i757 int, i758
int, i759 int, i760 int, i761 int, i762 int, i763 int, i764 int, i765 int, i766
int, i767 int, i768 int, i769 int, i770 int, i771 int, i772 int, i773 int, i774
int, i775 int, i776 int, i777 int, i778 int, i779 int, i780 int, i781 int, i782
int, i783 int, i784 int, i785 int, i786 int, i787 int, i788 int, i789 int, i790
int, i791 int, i792 int, i793 int, i794 int, i795 int, i796 int, i797 int, i798
int, i799 int, i800 int, i801 int, i802 int, i803 int, i804 int, i805 int, i806
int, i807 int, i808 int, i809 int, i810 int, i811 int, i812 int, i813 int, i814
int, i815 int, i816 int, i817 int, i818 int, i819 int, i820 int, i821 int, i822
int, i823 int, i824 int, i825 int, i826 int, i827 int, i828 int, i829 int, i830
int, i831 int, i832 int, i833 int, i834 int, i835 int, i836 int, i837 int, i838
int, i839 int, i840 int, i841 int, i842 int, i843 int, i844 int, i845 int, i846
int, i847 int, i848 int, i849 int, i850 int, i851 int, i852 int, i853 int, i854
int, i855 int, i856 int, i857 int, i858 int, i859 int, i860 int, i861 int, i862
int, i863 int, i864 int, i865 int, i866 int, i867 int, i868 int, i869 int, i870
int, i871 int, i872 int, i873 int, i874 int, i875 int, i876 int, i877 int, i878
int, i879 int, i880 int, i881 int, i882 int, i883 int, i884 int, i885 int, i886
int, i887 int, i888 int, i889 int, i890 int, i891 int, i892 int, i893 int, i894
int, i895 int, i896 int, i897 int, i898 int, i899 int, i900 int, i901 int, i902
int, i903 int, i904 int, i905 int, i906 int, i907 int, i908 int, i909 int, i910
int, i911 int, i912 int, i913 int, i914 int, i915 int, i916 int, i917 int, i918
int, i919 int, i920 int, i921 int, i922 int, i923 int, i924 int, i925 int, i926
int, i927 int, i928 int, i929 int, i930 int, i931 int, i932 int, i933 int, i934
int, i935 int, i936 int, i937 int, i938 int, i939 int, i940 int, i941 int, i942
int, i943 int, i944 int, i945 int, i946 int, i947 int, i948 int, i949 int, i950
int, i951 int, i952 int, i953 int, i954 int, i955 int, i956 int, i957 int, i958
int, i959 int, i960 int, i961 int, i962 int, i963 int, i964 int, i965 int, i966
int, i967 int, i968 int, i969 int, i970 int, i971 int, i972 int, i973 int, i974
int, i975 int, i976 int, i977 int, i978 int, i979 int, i980 int, i981 int, i982
int, i983 int, i984 int, i985 int, i986 int, i987 int, i988 int, i989 int, i990
int, i991 int, i992 int, i993 int, i994 int, i995 int, i996 int, i997 int, i998
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int, i999 int, i1000 int, b blob) row_format=dynamic;
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insert into t1 values (1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, "Sergei");
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update t1 set b=repeat('a',256);
update t1 set i1=0, i2=0, i3=0, i4=0, i5=0, i6=0, i7=0;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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delete from t1 where i8=1;
select i1,i2 from t1;
i1	i2
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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drop table t1;
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CREATE TABLE `t1` (
`post_id` mediumint(8) unsigned NOT NULL auto_increment,
`topic_id` mediumint(8) unsigned NOT NULL default '0',
`post_time` datetime NOT NULL default '0000-00-00 00:00:00',
`post_text` text NOT NULL,
`icon_url` varchar(10) NOT NULL default '',
`sign` tinyint(1) unsigned NOT NULL default '0',
`post_edit` varchar(150) NOT NULL default '',
`poster_login` varchar(35) NOT NULL default '',
`ip` varchar(15) NOT NULL default '',
PRIMARY KEY  (`post_id`),
KEY `post_time` (`post_time`),
KEY `ip` (`ip`),
KEY `poster_login` (`poster_login`),
KEY `topic_id` (`topic_id`),
FULLTEXT KEY `post_text` (`post_text`)
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) ENGINE=MyISAM;
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INSERT INTO t1 (post_text) VALUES ('ceci est un test'),('ceci est un test'),('ceci est un test'),('ceci est un test'),('ceci est un test');
REPAIR TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	repair	status	OK
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CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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drop table t1;
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CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), d varchar(255), e varchar(255), KEY t1 (a, b, c, d, e));
ERROR 42000: Specified key was too long; max key length is 1000 bytes
CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255), d varchar(255), e varchar(255));
ALTER TABLE t1 ADD INDEX t1 (a, b, c, d, e);
ERROR 42000: Specified key was too long; max key length is 1000 bytes
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DROP TABLE t1;
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CREATE TABLE t1 (a int not null, b int, c int, key(b), key(c), key(a,b), key(c,a));
INSERT into t1 values (0, null, 0), (0, null, 1), (0, null, 2), (0, null,3), (1,1,4);
create table t2 (a int not null, b int, c int, key(b), key(c), key(a));
INSERT into t2 values (1,1,1), (2,2,2);
optimize table t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	b	1	b	A	5	NULL	NULL	YES	BTREE	
t1	1	c	1	c	A	5	NULL	NULL	YES	BTREE	
t1	1	a	1	a	A	1	NULL	NULL		BTREE	
t1	1	a	2	b	A	5	NULL	NULL	YES	BTREE	
t1	1	c_2	1	c	A	5	NULL	NULL	YES	BTREE	
t1	1	c_2	2	a	A	5	NULL	NULL		BTREE	
explain select * from t1,t2 where t1.a=t2.a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
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1	SIMPLE	t2	ALL	a	NULL	NULL	NULL	2	
1	SIMPLE	t1	ALL	a	NULL	NULL	NULL	4	Using where
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explain select * from t1,t2 force index(a) where t1.a=t2.a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ALL	a	NULL	NULL	NULL	2	
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1	SIMPLE	t1	ALL	a	NULL	NULL	NULL	4	Using where
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explain select * from t1 force index(a),t2 force index(a) where t1.a=t2.a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ALL	a	NULL	NULL	NULL	2	
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1	SIMPLE	t1	ref	a	a	4	test.t2.a	3	
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explain select * from t1,t2 where t1.b=t2.b;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ALL	b	NULL	NULL	NULL	2	
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1	SIMPLE	t1	ref	b	b	5	test.t2.b	1	Using where
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explain select * from t1,t2 force index(c) where t1.a=t2.a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
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1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	
1	SIMPLE	t1	ALL	a	NULL	NULL	NULL	4	Using where
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explain select * from t1 where a=0 or a=2;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	a	NULL	NULL	NULL	5	Using where
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explain select * from t1 force index (a) where a=0 or a=2;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	a	a	4	NULL	4	Using where
explain select * from t1 where c=1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	c,c_2	c	5	const	1	Using where
explain select * from t1 use index() where c=1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	Using where
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drop table t1,t2;
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create table t1 (a int not null auto_increment primary key, b varchar(255));
insert into t1 (b) values (repeat('a',100)),(repeat('b',100)),(repeat('c',100));
update t1 set b=repeat(left(b,1),200) where a=1;
delete from t1 where (a & 1)= 0;
update t1 set b=repeat('e',200) where a=1;
flush tables;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
update t1 set b=repeat(left(b,1),255) where a between 1 and 5;
update t1 set b=repeat(left(b,1),10) where a between 32 and 43;
update t1 set b=repeat(left(b,1),2) where a between 64 and 66;
update t1 set b=repeat(left(b,1),65) where a between 67 and 70;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
insert into t1 (b) values (repeat('z',100));
update t1 set b="test" where left(b,1) > 'n';
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
drop table t1;
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create table t1 ( a text not null, key a (a(20)));
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insert into t1 values ('aaa   '),('aaa'),('aa');
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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repair table t1;
Table	Op	Msg_type	Msg_text
test.t1	repair	status	OK
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select concat(a,'.') from t1 where a='aaa';
concat(a,'.')
aaa   .
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aaa.
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select concat(a,'.') from t1 where binary a='aaa';
concat(a,'.')
aaa.
update t1 set a='bbb' where a='aaa';
select concat(a,'.') from t1;
concat(a,'.')
bbb.
bbb.
aa.
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drop table t1;
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create table t1(a text not null, b text not null, c text not null, index (a(10),b(10),c(10)));
insert into t1 values('807780', '477', '165');
insert into t1 values('807780', '477', '162');
insert into t1 values('807780', '472', '162');
select * from t1 where a='807780' and b='477' and c='165';
a	b	c
807780	477	165
drop table t1;
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DROP TABLE IF EXISTS t1;
Warnings:
Note	1051	Unknown table 't1'
CREATE TABLE t1 (a varchar(150) NOT NULL, KEY (a));
INSERT t1 VALUES ("can \tcan");
INSERT t1 VALUES ("can   can");
INSERT t1 VALUES ("can");
SELECT * FROM t1;
a
can 	can
can
can   can
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
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create table t1 (a blob);
insert into t1 values('a '),('a');
select concat(a,'.') from t1 where a='a';
concat(a,'.')
a.
select concat(a,'.') from t1 where a='a ';
concat(a,'.')
a .
alter table t1 add key(a(2));
select concat(a,'.') from t1 where a='a';
concat(a,'.')
a.
select concat(a,'.') from t1 where a='a ';
concat(a,'.')
a .
drop table t1;
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create table t1 (a int not null auto_increment primary key, b text not null, unique b (b(20)));
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insert into t1 (b) values ('a'),('b'),('c');
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select concat(b,'.') from t1;
concat(b,'.')
a.
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b.
c.
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update t1 set b='b ' where a=2;
update t1 set b='b  ' where a > 1;
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ERROR 23000: Duplicate entry 'b  ' for key 2
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insert into t1 (b) values ('b');
ERROR 23000: Duplicate entry 'b' for key 2
select * from t1;
a	b
1	a
2	b  
3	c
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delete from t1 where b='b';
select a,concat(b,'.') from t1;
a	concat(b,'.')
1	a.
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3	c.
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drop table t1;
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create table t1 (a int not null);
create table t2 (a int not null, primary key (a));
insert into t1 values (1);
insert into t2 values (1),(2);
select sql_big_result distinct t1.a from t1,t2 order by t2.a;
a
1
select distinct t1.a from t1,t2 order by t2.a;
a
1
select sql_big_result distinct t1.a from t1,t2;
a
1
explain select sql_big_result distinct t1.a from t1,t2 order by t2.a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	Using temporary
1	SIMPLE	t2	index	NULL	PRIMARY	4	NULL	2	Using index; Distinct
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explain select distinct t1.a from t1,t2 order by t2.a;
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id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	Using temporary
1	SIMPLE	t2	index	NULL	PRIMARY	4	NULL	2	Using index; Distinct
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drop table t1,t2;
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create table t1 (
c1 varchar(32),
key (c1)
) engine=myisam;
alter table t1 disable keys;
insert into t1 values ('a'), ('b');
select c1 from t1 order by c1 limit 1;
c1
a
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drop table t1;
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create table t1 (a int not null, primary key(a));
create table t2 (a int not null, b int not null, primary key(a,b));
insert into t1 values (1),(2),(3),(4),(5),(6);
insert into t2 values (1,1),(2,1);
lock tables t1 read local, t2 read local;
select straight_join * from t1,t2 force index (primary) where t1.a=t2.a;
a	a	b
1	1	1
2	2	1
insert into t2 values(2,0);
select straight_join * from t1,t2 force index (primary) where t1.a=t2.a;
a	a	b
1	1	1
2	2	1
drop table t1,t2;
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CREATE TABLE t1 (c1 varchar(250) NOT NULL);
CREATE TABLE t2 (c1 varchar(250) NOT NULL, PRIMARY KEY (c1));
INSERT INTO t1 VALUES ('test000001'), ('test000002'), ('test000003');
INSERT INTO t2 VALUES ('test000002'), ('test000003'), ('test000004');
LOCK TABLES t1 READ LOCAL, t2 READ LOCAL;
SELECT t1.c1 AS t1c1, t2.c1 AS t2c1 FROM t1, t2
WHERE t1.c1 = t2.c1 HAVING t1c1 != t2c1;
t1c1	t2c1
INSERT INTO t2 VALUES ('test000001'), ('test000005');
SELECT t1.c1 AS t1c1, t2.c1 AS t2c1 FROM t1, t2
WHERE t1.c1 = t2.c1 HAVING t1c1 != t2c1;
t1c1	t2c1
DROP TABLE t1,t2;
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CREATE TABLE t1 (`a` int(11) NOT NULL default '0', `b` int(11) NOT NULL default '0', UNIQUE KEY `a` USING RTREE (`a`,`b`)) ENGINE=MyISAM;
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Got one of the listed errors
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create table t1 (a int, b varchar(200), c text not null) checksum=1;
create table t2 (a int, b varchar(200), c text not null) checksum=0;
insert t1 values (1, "aaa", "bbb"), (NULL, "", "ccccc"), (0, NULL, "");
insert t2 select * from t1;
checksum table t1, t2, t3 quick;
Table	Checksum
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test.t1	2948697075
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test.t2	NULL
test.t3	NULL
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Warnings:
Error	1146	Table 'test.t3' doesn't exist
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checksum table t1, t2, t3;
Table	Checksum
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test.t1	2948697075
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test.t2	2948697075
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test.t3	NULL
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Warnings:
Error	1146	Table 'test.t3' doesn't exist
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checksum table t1, t2, t3 extended;
Table	Checksum
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test.t1	2948697075
test.t2	2948697075
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test.t3	NULL
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Warnings:
Error	1146	Table 'test.t3' doesn't exist
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drop table t1,t2;
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create table t1 (a int, key (a));
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	
alter table t1 disable keys;
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled
create table t2 (a int);
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set @@rand_seed1=31415926,@@rand_seed2=2718281828;
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insert t1 select * from t2;
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	NULL	NULL	NULL	YES	BTREE	disabled
alter table t1 enable keys;
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	1000	NULL	NULL	YES	BTREE	
alter table t1 engine=heap;
alter table t1 disable keys;
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Warnings:
Note	1031	Table storage engine for 't1' doesn't have this option
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show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
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t1	1	a	1	a	NULL	500	NULL	NULL	YES	HASH	
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drop table t1,t2;
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create table t1 ( a tinytext, b char(1), index idx (a(1),b) );
insert into t1 values (null,''), (null,'');
explain select count(*) from t1 where a is null;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx	idx	4	const	1	Using where
select count(*) from t1 where a is null;
count(*)
2
drop table t1;
609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626
create table t1 (c1 int, index(c1));
create table t2 (c1 int, index(c1)) engine=merge union=(t1);
insert into t1 values (1);
flush tables;
select * from t2;
c1
1
flush tables;
truncate table t1;
insert into t1 values (1);
flush tables;
select * from t2;
c1
1
truncate table t1;
ERROR HY000: MyISAM table 't1' is in use (most likely by a MERGE table). Try FLUSH TABLES.
insert into t1 values (1);
drop table t1,t2;
627 628 629 630 631 632 633 634
create table t1 (c1 int, c2 varchar(4) not null default '',
key(c2(3))) default charset=utf8;
insert into t1 values (1,'A'), (2, 'B'), (3, 'A');
update t1 set c2='A  B' where c1=2;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
drop table t1;
635 636 637 638 639 640 641 642 643 644 645 646 647 648
create table t1 (c1 int);
insert into t1 values (1),(2),(3),(4);
checksum table t1;
Table	Checksum
test.t1	149057747
delete from t1 where c1 = 1;
create table t2 as select * from t1;
checksum table t1;
Table	Checksum
test.t1	984116287
checksum table t2;
Table	Checksum
test.t2	984116287
drop table t1, t2;
649 650
show variables like 'myisam_stats_method';
Variable_name	Value
651
myisam_stats_method	nulls_unequal
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691
create table t1 (a int, key(a));
insert into t1 values (0),(1),(2),(3),(4);
insert into t1 select NULL from t1;
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE	
insert into t1 values (11);
delete from t1 where a=11;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE	
set myisam_stats_method=nulls_equal;
show variables like 'myisam_stats_method';
Variable_name	Value
myisam_stats_method	nulls_equal
insert into t1 values (11);
delete from t1 where a=11;
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE	
insert into t1 values (11);
delete from t1 where a=11;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE	
set myisam_stats_method=DEFAULT;
show variables like 'myisam_stats_method';
Variable_name	Value
692
myisam_stats_method	nulls_unequal
693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709
insert into t1 values (11);
delete from t1 where a=11;
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE	
insert into t1 values (11);
delete from t1 where a=11;
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	10	NULL	NULL	YES	BTREE	
drop table t1;
710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741
set myisam_stats_method=nulls_ignored;
show variables like 'myisam_stats_method';
Variable_name	Value
myisam_stats_method	nulls_ignored
create table t1 (
a char(3), b char(4), c char(5), d char(6),
key(a,b,c,d)
);
insert into t1 values ('bcd','def1', NULL, 'zz');
insert into t1 values ('bcd','def2', NULL, 'zz');
insert into t1 values ('bce','def1', 'yuu', NULL);
insert into t1 values ('bce','def2', NULL, 'quux');
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	2	NULL	NULL	YES	BTREE	
t1	1	a	2	b	A	4	NULL	NULL	YES	BTREE	
t1	1	a	3	c	A	4	NULL	NULL	YES	BTREE	
t1	1	a	4	d	A	4	NULL	NULL	YES	BTREE	
delete from t1;
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	0	NULL	NULL	YES	BTREE	
t1	1	a	2	b	A	0	NULL	NULL	YES	BTREE	
t1	1	a	3	c	A	0	NULL	NULL	YES	BTREE	
t1	1	a	4	d	A	0	NULL	NULL	YES	BTREE	
set myisam_stats_method=DEFAULT;
742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759
drop table t1;
create table t1(
cip INT NOT NULL,
time TIME NOT NULL,
score INT NOT NULL DEFAULT 0,
bob TINYBLOB
);
insert into t1 (cip, time) VALUES (1, '00:01'), (2, '00:02'), (3,'00:03');
insert into t1 (cip, bob, time) VALUES (4, 'a', '00:04'), (5, 'b', '00:05'), 
(6, 'c', '00:06');
select * from t1 where bob is null and cip=1;
cip	time	score	bob
1	00:01:00	0	NULL
create index bug on t1 (bob(22), cip, time);
select * from t1 where bob is null and cip=1;
cip	time	score	bob
1	00:01:00	0	NULL
drop table t1;
760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777
create table t1 (
id1 int not null auto_increment,
id2 int not null default '0',
t text not null,
primary key  (id1),
key x (id2, t(32))
) engine=myisam;
insert into t1 (id2, t) values
(10, 'abc'), (10, 'abc'), (10, 'abc'),
(20, 'abc'), (20, 'abc'), (20, 'def'),
(10, 'abc'), (10, 'abc');
select count(*)   from t1 where id2 = 10;
count(*)
5
select count(id1) from t1 where id2 = 10;
count(id1)
5
drop table t1;
778 779 780 781 782 783 784 785 786 787 788 789 790
CREATE TABLE t1(a TINYINT, KEY(a)) ENGINE=MyISAM;
INSERT INTO t1 VALUES(1);
SELECT MAX(a) FROM t1 IGNORE INDEX(a);
MAX(a)
1
ALTER TABLE t1 DISABLE KEYS;
SELECT MAX(a) FROM t1;
MAX(a)
1
SELECT MAX(a) FROM t1 IGNORE INDEX(a);
MAX(a)
1
DROP TABLE t1;
791 792 793 794 795 796 797 798
CREATE TABLE t1(a CHAR(9), b VARCHAR(7)) ENGINE=MyISAM;
INSERT INTO t1(a) VALUES('xxxxxxxxx'),('xxxxxxxxx');
UPDATE t1 AS ta1,t1 AS ta2 SET ta1.b='aaaaaa',ta2.b='bbbbbb';
SELECT * FROM t1;
a	b
xxxxxxxxx	bbbbbb
xxxxxxxxx	bbbbbb
DROP TABLE t1;
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843
SET @@myisam_repair_threads=2;
SHOW VARIABLES LIKE 'myisam_repair%';
Variable_name	Value
myisam_repair_threads	2
CREATE TABLE t1 (
`_id` int(11) NOT NULL default '0',
`url` text,
`email` text,
`description` text,
`loverlap` int(11) default NULL,
`roverlap` int(11) default NULL,
`lneighbor_id` int(11) default NULL,
`rneighbor_id` int(11) default NULL,
`length_` int(11) default NULL,
`sequence` mediumtext,
`name` text,
`_obj_class` text NOT NULL,
PRIMARY KEY  (`_id`),
UNIQUE KEY `sequence_name_index` (`name`(50)),
KEY (`length_`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES
(1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample1',''),
(2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample2',''),
(3,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample3',''),
(4,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample4',''),
(5,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample5',''),
(6,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample6',''),
(7,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample7',''),
(8,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample8',''),
(9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample9','');
SELECT _id FROM t1;
_id
1
2
3
4
5
6
7
8
9
DELETE FROM t1 WHERE _id < 8;
SHOW TABLE STATUS LIKE 't1';
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
844
t1	MyISAM	10	Dynamic	2	#	#	#	#	140	#	#	#	#	#	#		
845 846 847 848 849 850 851 852 853 854 855
CHECK TABLE t1 EXTENDED;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
OPTIMIZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
CHECK TABLE t1 EXTENDED;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SHOW TABLE STATUS LIKE 't1';
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
856
t1	MyISAM	10	Dynamic	2	#	#	#	#	0	#	#	#	#	#	#		
857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902
SELECT _id FROM t1;
_id
8
9
DROP TABLE t1;
CREATE TABLE t1 (
`_id` int(11) NOT NULL default '0',
`url` text,
`email` text,
`description` text,
`loverlap` int(11) default NULL,
`roverlap` int(11) default NULL,
`lneighbor_id` int(11) default NULL,
`rneighbor_id` int(11) default NULL,
`length_` int(11) default NULL,
`sequence` mediumtext,
`name` text,
`_obj_class` text NOT NULL,
PRIMARY KEY  (`_id`),
UNIQUE KEY `sequence_name_index` (`name`(50)),
KEY (`length_`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES
(1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample1',''),
(2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample2',''),
(3,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample3',''),
(4,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample4',''),
(5,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample5',''),
(6,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample6',''),
(7,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample7',''),
(8,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample8',''),
(9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample9','');
SELECT _id FROM t1;
_id
1
2
3
4
5
6
7
8
9
DELETE FROM t1 WHERE _id < 8;
SHOW TABLE STATUS LIKE 't1';
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
903
t1	MyISAM	10	Dynamic	2	#	#	#	#	140	#	#	#	#	#	#		
904 905 906 907 908 909 910 911 912 913 914
CHECK TABLE t1 EXTENDED;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
REPAIR TABLE t1 QUICK;
Table	Op	Msg_type	Msg_text
test.t1	repair	status	OK
CHECK TABLE t1 EXTENDED;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SHOW TABLE STATUS LIKE 't1';
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
915
t1	MyISAM	10	Dynamic	2	#	#	#	#	140	#	#	#	#	#	#		
916 917 918 919 920 921 922 923 924
SELECT _id FROM t1;
_id
8
9
DROP TABLE t1;
SET @@myisam_repair_threads=1;
SHOW VARIABLES LIKE 'myisam_repair%';
Variable_name	Value
myisam_repair_threads	1
925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945
CREATE TABLE t1(a VARCHAR(16));
INSERT INTO t1 VALUES('aaaaaaaa'),(NULL);
UPDATE t1 AS ta1, t1 AS ta2 SET ta1.a='aaaaaaaaaaaaaaaa';
SELECT * FROM t1;
a
aaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaa
DROP TABLE t1;
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(1),(2);
UPDATE t1,t1 AS t2 SET t1.a=t1.a+2 WHERE t1.a=t2.a-1;
SELECT * FROM t1 ORDER BY a;
a
2
3
DROP TABLE t1;
CREATE TABLE t1 (c1 TEXT) AVG_ROW_LENGTH=70100 MAX_ROWS=4100100100;
SHOW TABLE STATUS LIKE 't1';
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
t1	MyISAM	10	Dynamic	X	X	X	72057594037927935	X	X	X	X	X	X	latin1_swedish_ci	X	max_rows=4100100100 avg_row_length=70100	
DROP TABLE t1;
946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095
CREATE TABLE t1 (c1 TEXT NOT NULL, KEY c1 (c1(10))) ENGINE=MyISAM;
INSERT INTO t1 VALUES
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)), (CHAR(9,65)),
(''), (''), (''), (''),
(' B'), (' B'), (' B'), (' B');
SELECT DISTINCT COUNT(*) FROM t1 WHERE c1 = '';
COUNT(*)
4
SELECT DISTINCT length(c1), c1 FROM t1 WHERE c1 = '';
length(c1)	c1
0	
SELECT DISTINCT COUNT(*) FROM t1 IGNORE INDEX (c1) WHERE c1 = '';
COUNT(*)
4
SELECT DISTINCT length(c1), c1 FROM t1 IGNORE INDEX (c1) WHERE c1 = '';
length(c1)	c1
0	
SELECT DISTINCT length(c1), c1 FROM t1 ORDER BY c1;
length(c1)	c1
0	
2		A
2	 B
DROP TABLE t1;
1096
End of 4.1 tests
1097 1098 1099 1100 1101 1102 1103 1104 1105
set storage_engine=MyISAM;
drop table if exists t1,t2,t3;
--- Testing varchar ---
--- Testing varchar ---
create table t1 (v varchar(10), c char(10), t text);
insert into t1 values('+ ', '+ ', '+ ');
set @a=repeat(' ',20);
insert into t1 values (concat('+',@a),concat('+',@a),concat('+',@a));
Warnings:
1106
Note	1265	Data truncated for column 'v' at row 1
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
select concat('*',v,'*',c,'*',t,'*') from t1;
concat('*',v,'*',c,'*',t,'*')
*+ *+*+ *
*+         *+*+                    *
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(10) default NULL,
  `c` char(10) default NULL,
  `t` text
) ENGINE=MyISAM DEFAULT CHARSET=latin1
create table t2 like t1;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `v` varchar(10) default NULL,
  `c` char(10) default NULL,
  `t` text
) ENGINE=MyISAM DEFAULT CHARSET=latin1
create table t3 select * from t1;
show create table t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `v` varchar(10) default NULL,
  `c` char(10) default NULL,
  `t` text
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t1 modify c varchar(10);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(10) default NULL,
  `c` varchar(10) default NULL,
  `t` text
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t1 modify v char(10);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` char(10) default NULL,
  `c` varchar(10) default NULL,
  `t` text
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t1 modify t varchar(10);
Warnings:
1152
Note	1265	Data truncated for column 't' at row 2
1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` char(10) default NULL,
  `c` varchar(10) default NULL,
  `t` varchar(10) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select concat('*',v,'*',c,'*',t,'*') from t1;
concat('*',v,'*',c,'*',t,'*')
*+*+*+ *
*+*+*+         *
drop table t1,t2,t3;
create table t1 (v varchar(10), c char(10), t text, key(v), key(c), key(t(10)));
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(10) default NULL,
  `c` char(10) default NULL,
  `t` text,
  KEY `v` (`v`),
  KEY `c` (`c`),
  KEY `t` (`t`(10))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select count(*) from t1;
count(*)
270
insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1)));
select count(*) from t1 where v='a';
count(*)
10
select count(*) from t1 where c='a';
count(*)
10
select count(*) from t1 where t='a';
count(*)
10
select count(*) from t1 where v='a  ';
count(*)
10
select count(*) from t1 where c='a  ';
count(*)
10
select count(*) from t1 where t='a  ';
count(*)
10
select count(*) from t1 where v between 'a' and 'a ';
count(*)
10
select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
count(*)
10
select count(*) from t1 where v like 'a%';
count(*)
11
select count(*) from t1 where c like 'a%';
count(*)
11
select count(*) from t1 where t like 'a%';
count(*)
11
select count(*) from t1 where v like 'a %';
count(*)
9
explain select count(*) from t1 where v='a  ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1218
1	SIMPLE	t1	ref	v	v	13	const	#	Using where; Using index
1219 1220
explain select count(*) from t1 where c='a  ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1221
1	SIMPLE	t1	ref	c	c	11	const	#	Using where; Using index
1222 1223
explain select count(*) from t1 where t='a  ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1224
1	SIMPLE	t1	ref	t	t	13	const	#	Using where
1225 1226
explain select count(*) from t1 where v like 'a%';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1227
1	SIMPLE	t1	range	v	v	13	NULL	#	Using where; Using index
1228 1229
explain select count(*) from t1 where v between 'a' and 'a ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1230
1	SIMPLE	t1	ref	v	v	13	const	#	Using where; Using index
1231 1232
explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1233
1	SIMPLE	t1	ref	v	v	13	const	#	Using where; Using index
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
alter table t1 add unique(v);
ERROR 23000: Duplicate entry '{ ' for key 1
alter table t1 add key(v);
select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a';
qq
*a*a*a*
*a *a*a *
*a  *a*a  *
*a   *a*a   *
*a    *a*a    *
*a     *a*a     *
*a      *a*a      *
*a       *a*a       *
*a        *a*a        *
*a         *a*a         *
explain select * from t1 where v='a';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1251
1	SIMPLE	t1	ref	v,v_2	#	13	const	#	Using where
1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
select v,count(*) from t1 group by v limit 10;
v	count(*)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select v,count(c) from t1 group by v limit 10;
v	count(c)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select sql_big_result v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select sql_big_result v,count(c) from t1 group by v limit 10;
v	count(c)
a	1
1303 1304 1305 1306 1307 1308 1309
a 	10
b     	10
c    	10
d   	10
e  	10
f     	10
g    	10
1310
h	10
1311
i     	10
1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
select c,count(*) from t1 group by c limit 10;
c	count(*)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select c,count(t) from t1 group by c limit 10;
c	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select sql_big_result c,count(t) from t1 group by c limit 10;
c	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select t,count(*) from t1 group by t limit 10;
t	count(*)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select t,count(t) from t1 group by t limit 10;
t	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select sql_big_result t,count(t) from t1 group by t limit 10;
t	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414
alter table t1 modify v varchar(300), drop key v, drop key v_2, add key v (v);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(300) default NULL,
  `c` char(10) default NULL,
  `t` text,
  KEY `c` (`c`),
  KEY `t` (`t`(10)),
  KEY `v` (`v`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select count(*) from t1 where v='a';
count(*)
10
select count(*) from t1 where v='a  ';
count(*)
10
select count(*) from t1 where v between 'a' and 'a ';
count(*)
10
select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
count(*)
10
select count(*) from t1 where v like 'a%';
count(*)
11
select count(*) from t1 where v like 'a %';
count(*)
9
explain select count(*) from t1 where v='a  ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1415
1	SIMPLE	t1	ref	v	v	303	const	#	Using where; Using index
1416 1417
explain select count(*) from t1 where v like 'a%';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1418
1	SIMPLE	t1	range	v	v	303	NULL	#	Using where; Using index
1419 1420
explain select count(*) from t1 where v between 'a' and 'a ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1421
1	SIMPLE	t1	ref	v	v	303	const	#	Using where; Using index
1422 1423
explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1424
1	SIMPLE	t1	ref	v	v	303	const	#	Using where; Using index
1425 1426
explain select * from t1 where v='a';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1427
1	SIMPLE	t1	ref	v	v	303	const	#	Using where
1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
select v,count(*) from t1 group by v limit 10;
v	count(*)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select sql_big_result v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
alter table t1 drop key v, add key v (v(30));
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(300) default NULL,
  `c` char(10) default NULL,
  `t` text,
  KEY `c` (`c`),
  KEY `t` (`t`(10)),
  KEY `v` (`v`(30))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select count(*) from t1 where v='a';
count(*)
10
select count(*) from t1 where v='a  ';
count(*)
10
select count(*) from t1 where v between 'a' and 'a ';
count(*)
10
select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
count(*)
10
select count(*) from t1 where v like 'a%';
count(*)
11
select count(*) from t1 where v like 'a %';
count(*)
9
explain select count(*) from t1 where v='a  ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1495
1	SIMPLE	t1	ref	v	v	33	const	#	Using where
1496 1497
explain select count(*) from t1 where v like 'a%';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1498
1	SIMPLE	t1	range	v	v	33	NULL	#	Using where
1499 1500
explain select count(*) from t1 where v between 'a' and 'a ';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1501
1	SIMPLE	t1	ref	v	v	33	const	#	Using where
1502 1503
explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1504
1	SIMPLE	t1	ref	v	v	33	const	#	Using where
1505 1506
explain select * from t1 where v='a';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1507
1	SIMPLE	t1	ref	v	v	33	const	#	Using where
1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590
select v,count(*) from t1 group by v limit 10;
v	count(*)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select sql_big_result v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
alter table t1 modify v varchar(600), drop key v, add key v (v);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(600) default NULL,
  `c` char(10) default NULL,
  `t` text,
  KEY `c` (`c`),
  KEY `t` (`t`(10)),
  KEY `v` (`v`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select v,count(*) from t1 group by v limit 10;
v	count(*)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
select sql_big_result v,count(t) from t1 group by v limit 10;
v	count(t)
a	1
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
drop table t1;
create table t1 (a char(10), unique (a));
insert into t1 values ('a   ');
insert into t1 values ('a ');
ERROR 23000: Duplicate entry 'a' for key 1
alter table t1 modify a varchar(10);
insert into t1 values ('a '),('a  '),('a   '),('a         ');
ERROR 23000: Duplicate entry 'a ' for key 1
insert into t1 values ('a     ');
ERROR 23000: Duplicate entry 'a     ' for key 1
insert into t1 values ('a          ');
ERROR 23000: Duplicate entry 'a         ' for key 1
insert into t1 values ('a ');
ERROR 23000: Duplicate entry 'a ' for key 1
update t1 set a='a  ' where a like 'a%';
select concat(a,'.') from t1;
concat(a,'.')
a  .
update t1 set a='abc    ' where a like 'a ';
select concat(a,'.') from t1;
concat(a,'.')
a  .
update t1 set a='a      ' where a like 'a %';
select concat(a,'.') from t1;
concat(a,'.')
a      .
update t1 set a='a  ' where a like 'a      ';
select concat(a,'.') from t1;
concat(a,'.')
a  .
drop table t1;
create table t1 (v varchar(10), c char(10), t text, key(v(5)), key(c(5)), key(t(5)));
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(10) default NULL,
  `c` char(10) default NULL,
  `t` text,
  KEY `v` (`v`(5)),
  KEY `c` (`c`(5)),
  KEY `t` (`t`(5))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (v char(10) character set utf8);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` char(10) character set utf8 default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (v varchar(10), c char(10)) row_format=fixed;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` varchar(10) default NULL,
  `c` char(10) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 ROW_FORMAT=FIXED
insert into t1 values('a','a'),('a ','a ');
select concat('*',v,'*',c,'*') from t1;
concat('*',v,'*',c,'*')
*a*a*
*a *a*
drop table t1;
create table t1 (v varchar(65530), key(v(10)));
insert into t1 values(repeat('a',65530));
select length(v) from t1 where v=repeat('a',65530);
length(v)
65530
drop table t1;
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create table t1(a int, b varchar(12), key ba(b, a));
insert into t1 values (1, 'A'), (20, NULL);
explain select * from t1 where a=20 and b is null;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	ba	ba	20	const,const	1	Using where; Using index
select * from t1 where a=20 and b is null;
a	b
20	NULL
drop table t1;
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create table t1 (v varchar(65530), key(v));
Warnings:
Warning	1071	Specified key was too long; max key length is 1000 bytes
drop table if exists t1;
create table t1 (v varchar(65536));
Warnings:
Note	1246	Converting column 'v' from VARCHAR to TEXT
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` mediumtext
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (v varchar(65530) character set utf8);
Warnings:
Note	1246	Converting column 'v' from VARCHAR to TEXT
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `v` mediumtext character set utf8
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (v varchar(65535));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 65535. You have to change some columns to TEXT or BLOBs
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set storage_engine=MyISAM;
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create table t1 (a int) engine=myisam;
drop table if exists t1;
Warnings:
Error	2	Can't find file: 't1' (errno: 2)
create table t1 (a int) engine=myisam;
drop table t1;
unknown's avatar
unknown committed
1700
Got one of the listed errors
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create table t1 (a int) engine=myisam;
drop table t1;
unknown's avatar
unknown committed
1703
Got one of the listed errors
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drop table t1;
ERROR 42S02: Unknown table 't1'
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set @save_concurrent_insert=@@concurrent_insert;
set global concurrent_insert=1;
create table t1 (a int);
insert into t1 values (1),(2),(3),(4),(5);
lock table t1 read local;
insert into t1 values(6),(7);
unlock tables;
delete from t1 where a>=3 and a<=4;
lock table t1 read local;
set global concurrent_insert=2;
insert into t1 values (8),(9);
unlock tables;
insert into t1 values (10),(11),(12);
select * from t1;
a
1
2
11
10
5
6
7
8
9
12
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
drop table t1;
create table t1 (a int, b varchar(30) default "hello");
insert into t1 (a) values (1),(2),(3),(4),(5);
lock table t1 read local;
insert into t1 (a) values(6),(7);
unlock tables;
delete from t1 where a>=3 and a<=4;
lock table t1 read local;
set global concurrent_insert=2;
insert into t1 (a) values (8),(9);
unlock tables;
insert into t1 (a) values (10),(11),(12);
select a from t1;
a
1
2
11
10
5
6
7
8
9
12
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
drop table t1;
set global concurrent_insert=@save_concurrent_insert;
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create table t1 (a int, key(a));
insert into t1 values (1),(2),(3),(4),(NULL),(NULL),(NULL),(NULL);
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	8	NULL	NULL	YES	BTREE	
alter table t1 disable keys;
alter table t1 enable keys;
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
t1	1	a	1	a	A	8	NULL	NULL	YES	BTREE	
drop table t1;
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create table t1 (c1 int) engine=myisam pack_keys=0;
create table t2 (c1 int) engine=myisam pack_keys=1;
create table t3 (c1 int) engine=myisam pack_keys=default;
create table t4 (c1 int) engine=myisam pack_keys=2;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '2' at line 1
drop table t1, t2, t3;
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CREATE TABLE t1(a INT, b INT, KEY inx (a), UNIQUE KEY uinx (b)) ENGINE=MyISAM;
INSERT INTO t1(a,b) VALUES (1,1),(2,2),(3,3),(4,4),(5,5);
SELECT a FROM t1 FORCE INDEX (inx) WHERE a=1;
a
1
ALTER TABLE t1 DISABLE KEYS;
SELECT a FROM t1 FORCE INDEX (inx) WHERE a=1;
a
1
SELECT a FROM t1 USE INDEX (inx) WHERE a=1;
a
1
SELECT b FROM t1 FORCE INDEX (uinx) WHERE b=1;
b
1
SELECT b FROM t1 USE INDEX (uinx) WHERE b=1;
b
1
SELECT a FROM t1 FORCE INDEX (inx,uinx) WHERE a=1;
a
1
ALTER TABLE t1 ENABLE KEYS;
SELECT a FROM t1 FORCE INDEX (inx) WHERE a=1;
a
1
DROP TABLE t1;
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CREATE TABLE t1 (c1 INT, c2 INT, UNIQUE INDEX (c1), INDEX (c2)) ENGINE=MYISAM;
SHOW TABLE STATUS LIKE 't1';
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
t1	MyISAM	10	Fixed	0	#	#	#	1024	#	#	#	#	#	#	#		
INSERT INTO t1 VALUES (1,1);
SHOW TABLE STATUS LIKE 't1';
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
t1	MyISAM	10	Fixed	1	#	#	#	3072	#	#	#	#	#	#	#		
ALTER TABLE t1 DISABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
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
t1	MyISAM	10	Fixed	1	#	#	#	3072	#	#	#	#	#	#	#		
ALTER TABLE t1 ENABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
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
t1	MyISAM	10	Fixed	1	#	#	#	3072	#	#	#	#	#	#	#		
ALTER TABLE t1 DISABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
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
t1	MyISAM	10	Fixed	1	#	#	#	3072	#	#	#	#	#	#	#		
ALTER TABLE t1 ENABLE KEYS;
SHOW TABLE STATUS LIKE 't1';
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
t1	MyISAM	10	Fixed	1	#	#	#	3072	#	#	#	#	#	#	#		
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# Enable keys with parallel repair
SET @@myisam_repair_threads=2;
ALTER TABLE t1 DISABLE KEYS;
ALTER TABLE t1 ENABLE KEYS;
SET @@myisam_repair_threads=1;
CHECK TABLE t1 EXTENDED;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
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DROP TABLE t1;
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CREATE TABLE t1 (id int NOT NULL, ref int NOT NULL, INDEX (id)) ENGINE=MyISAM;
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 (id, ref) VALUES (1,3), (2,1), (3,2), (4,5), (4,4);
INSERT INTO t1 SELECT * FROM t2;
SELECT * FROM t1 AS a INNER JOIN t1 AS b USING (id) WHERE a.ref < b.ref;
id	ref	ref
4	4	5
SELECT * FROM t1;
id	ref
1	3
2	1
3	2
4	5
4	4
DELETE FROM a USING t1 AS a INNER JOIN t1 AS b USING (id) WHERE a.ref < b.ref;
SELECT * FROM t1;
id	ref
1	3
2	1
3	2
4	5
DROP TABLE t1, t2;
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End of 5.0 tests