1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
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
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
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
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
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
844
845
846
847
848
849
850
851
852
853
854
855
856
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
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
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
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
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
1152
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
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
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
1303
1304
1305
|
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8;
create table t1 (id int unsigned not null auto_increment, code tinyint unsigned not null, name char(20) not null, primary key (id), key (code), unique (name)) engine=bdb;
insert into t1 (code, name) values (1, 'Tim'), (1, 'Monty'), (2, 'David'), (2, 'Erik'), (3, 'Sasha'), (3, 'Jeremy'), (4, 'Matt');
select id, code, name from t1 order by id;
id code name
1 1 Tim
2 1 Monty
3 2 David
4 2 Erik
5 3 Sasha
6 3 Jeremy
7 4 Matt
update ignore t1 set id = 8, name = 'Sinisa' where id < 3;
select id, code, name from t1 order by id;
id code name
2 1 Monty
3 2 David
4 2 Erik
5 3 Sasha
6 3 Jeremy
7 4 Matt
8 1 Sinisa
update ignore t1 set id = id + 10, name = 'Ralph' where id < 4;
select id, code, name from t1 order by id;
id code name
3 2 David
4 2 Erik
5 3 Sasha
6 3 Jeremy
7 4 Matt
8 1 Sinisa
12 1 Ralph
drop table t1;
CREATE TABLE t1 (
id int(11) NOT NULL auto_increment,
parent_id int(11) DEFAULT '0' NOT NULL,
level tinyint(4) DEFAULT '0' NOT NULL,
PRIMARY KEY (id),
KEY parent_id (parent_id),
KEY level (level)
) engine=bdb;
INSERT INTO t1 VALUES (1,0,0),(3,1,1),(4,1,1),(8,2,2),(9,2,2),(17,3,2),(22,4,2),(24,4,2),(28,5,2),(29,5,2),(30,5,2),(31,6,2),(32,6,2),(33,6,2),(203,7,2),(202,7,2),(20,3,2),(157,0,0),(193,5,2),(40,7,2),(2,1,1),(15,2,2),(6,1,1),(34,6,2),(35,6,2),(16,3,2),(7,1,1),(36,7,2),(18,3,2),(26,5,2),(27,5,2),(183,4,2),(38,7,2),(25,5,2),(37,7,2),(21,4,2),(19,3,2),(5,1,1),(179,5,2);
update t1 set parent_id=parent_id+100;
select * from t1 where parent_id=102;
id parent_id level
8 102 2
9 102 2
15 102 2
update t1 set id=id+1000;
update t1 set id=1024 where id=1009;
ERROR 23000: Duplicate entry '1024' for key 1
select * from t1;
id parent_id level
1001 100 0
1002 101 1
1003 101 1
1004 101 1
1005 101 1
1006 101 1
1007 101 1
1008 102 2
1009 102 2
1015 102 2
1016 103 2
1017 103 2
1018 103 2
1019 103 2
1020 103 2
1021 104 2
1022 104 2
1024 104 2
1025 105 2
1026 105 2
1027 105 2
1028 105 2
1029 105 2
1030 105 2
1031 106 2
1032 106 2
1033 106 2
1034 106 2
1035 106 2
1036 107 2
1037 107 2
1038 107 2
1040 107 2
1157 100 0
1179 105 2
1183 104 2
1193 105 2
1202 107 2
1203 107 2
update ignore t1 set id=id+1;
select * from t1;
id parent_id level
1001 100 0
1002 101 1
1003 101 1
1004 101 1
1005 101 1
1006 101 1
1007 101 1
1008 102 2
1010 102 2
1015 102 2
1016 103 2
1017 103 2
1018 103 2
1019 103 2
1020 103 2
1021 104 2
1023 104 2
1024 104 2
1025 105 2
1026 105 2
1027 105 2
1028 105 2
1029 105 2
1030 105 2
1031 106 2
1032 106 2
1033 106 2
1034 106 2
1035 106 2
1036 107 2
1037 107 2
1039 107 2
1041 107 2
1158 100 0
1180 105 2
1184 104 2
1194 105 2
1202 107 2
1204 107 2
update ignore t1 set id=1023 where id=1010;
select * from t1 where parent_id=102 order by parent_id,id;
id parent_id level
1008 102 2
1010 102 2
1015 102 2
explain select level from t1 where level=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 Using where; Using index
explain select level,id from t1 where level=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 Using where; Using index
explain select level,id,parent_id from t1 where level=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 Using where
select level,id from t1 where level=1;
level id
1 1002
1 1003
1 1004
1 1005
1 1006
1 1007
select level,id,parent_id from t1 where level=1;
level id parent_id
1 1002 101
1 1003 101
1 1004 101
1 1005 101
1 1006 101
1 1007 101
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize 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 0 PRIMARY 1 id A 39 NULL NULL BTREE
t1 1 parent_id 1 parent_id A 9 NULL NULL BTREE
t1 1 level 1 level A 3 NULL NULL BTREE
drop table t1;
CREATE TABLE t1 (
gesuchnr int(11) DEFAULT '0' NOT NULL,
benutzer_id int(11) DEFAULT '0' NOT NULL,
PRIMARY KEY (gesuchnr,benutzer_id)
) engine=BDB;
replace into t1 (gesuchnr,benutzer_id) values (2,1);
replace into t1 (gesuchnr,benutzer_id) values (1,1);
replace into t1 (gesuchnr,benutzer_id) values (1,1);
select * from t1;
gesuchnr benutzer_id
1 1
2 1
drop table t1;
create table t1 (id int not null primary key, x int not null, key (x)) engine=bdb;
insert into t1 (id, x) values (1, 1);
replace into t1 (id, x) values (1, 2);
select * from t1;
id x
1 2
drop table t1;
create table t1 (a int) engine=bdb;
insert into t1 values (1), (2);
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize status OK
delete from t1 where a = 1;
select * from t1;
a
2
check table t1;
Table Op Msg_type Msg_text
test.t1 check note The storage engine for the table doesn't support check
drop table t1;
create table t1 (a int,b varchar(20)) engine=bdb;
insert into t1 values (1,""), (2,"testing");
delete from t1 where a = 1;
select * from t1;
a b
2 testing
create index skr on t1 (a);
insert into t1 values (3,""), (4,"testing");
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 skr 1 a A 3 NULL NULL YES BTREE
drop table t1;
create table t1 (a int,b varchar(20),key(a)) engine=bdb;
insert into t1 values (1,""), (2,"testing");
select * from t1 where a = 1;
a b
1
drop table t1;
create table t1 (a char(10) not null, b int not null auto_increment, primary key(a,b)) engine=BDB;
insert into t1 values ("a",1),("b",2),("a",2),("c",1);
insert into t1 values ("a",NULL),("b",NULL),("c",NULL),("e",NULL);
insert into t1 (a) values ("a"),("b"),("c"),("d");
insert into t1 (a) values ('k'),('d');
insert into t1 (a) values ("a");
insert into t1 values ("d",last_insert_id());
select * from t1;
a b
a 1
a 2
a 3
a 4
a 5
b 2
b 3
b 4
c 1
c 2
c 3
d 1
d 2
d 5
e 1
k 1
flush tables;
select count(*) from t1;
count(*)
16
drop table t1;
create table t1 (n int not null primary key) engine=bdb;
set autocommit=0;
insert into t1 values (4);
rollback;
select n, "after rollback" from t1;
n after rollback
insert into t1 values (4);
commit;
select n, "after commit" from t1;
n after commit
4 after commit
commit;
insert into t1 values (5);
insert into t1 values (4);
ERROR 23000: Duplicate entry '4' for key 1
commit;
select n, "after commit" from t1;
n after commit
4 after commit
5 after commit
set autocommit=1;
insert into t1 values (6);
insert into t1 values (4);
ERROR 23000: Duplicate entry '4' for key 1
select n from t1;
n
4
5
6
rollback;
drop table t1;
create table t1 ( id int NOT NULL PRIMARY KEY, nom varchar(64)) engine=BDB;
begin;
insert into t1 values(1,'hamdouni');
select id as afterbegin_id,nom as afterbegin_nom from t1;
afterbegin_id afterbegin_nom
1 hamdouni
rollback;
select id as afterrollback_id,nom as afterrollback_nom from t1;
afterrollback_id afterrollback_nom
set autocommit=0;
insert into t1 values(2,'mysql');
select id as afterautocommit0_id,nom as afterautocommit0_nom from t1;
afterautocommit0_id afterautocommit0_nom
2 mysql
rollback;
select id as afterrollback_id,nom as afterrollback_nom from t1;
afterrollback_id afterrollback_nom
set autocommit=1;
drop table t1;
CREATE TABLE t1 (id char(8) not null primary key, val int not null) engine=bdb;
insert into t1 values ('pippo', 12);
insert into t1 values ('pippo', 12);
ERROR 23000: Duplicate entry 'pippo' for key 1
delete from t1;
delete from t1 where id = 'pippo';
select * from t1;
id val
insert into t1 values ('pippo', 12);
set autocommit=0;
delete from t1;
rollback;
select * from t1;
id val
pippo 12
delete from t1;
commit;
select * from t1;
id val
drop table t1;
set autocommit=1;
CREATE TABLE t1 (ID INTEGER NOT NULL PRIMARY KEY, NAME VARCHAR(64)) ENGINE=BDB;
INSERT INTO t1 VALUES (1, 'Jochen');
select * from t1;
ID NAME
1 Jochen
drop table t1;
CREATE TABLE t1 ( _userid VARCHAR(60) NOT NULL PRIMARY KEY) ENGINE=BDB;
set autocommit=0;
INSERT INTO t1 SET _userid='marc@anyware.co.uk';
COMMIT;
SELECT * FROM t1;
_userid
marc@anyware.co.uk
SELECT _userid FROM t1 WHERE _userid='marc@anyware.co.uk';
_userid
marc@anyware.co.uk
drop table t1;
set autocommit=1;
CREATE TABLE t1 (
user_id int(10) DEFAULT '0' NOT NULL,
name varchar(100),
phone varchar(100),
ref_email varchar(100) DEFAULT '' NOT NULL,
detail varchar(200),
PRIMARY KEY (user_id,ref_email)
)engine=bdb;
INSERT INTO t1 VALUES (10292,'sanjeev','29153373','sansh777@hotmail.com','xxx'),(10292,'shirish','2333604','shirish@yahoo.com','ddsds'),(10292,'sonali','323232','sonali@bolly.com','filmstar');
select * from t1 where user_id=10292;
user_id name phone ref_email detail
10292 sanjeev 29153373 sansh777@hotmail.com xxx
10292 shirish 2333604 shirish@yahoo.com ddsds
10292 sonali 323232 sonali@bolly.com filmstar
INSERT INTO t1 VALUES (10291,'sanjeev','29153373','sansh777@hotmail.com','xxx'),(10293,'shirish','2333604','shirish@yahoo.com','ddsds');
select * from t1 where user_id=10292;
user_id name phone ref_email detail
10292 sanjeev 29153373 sansh777@hotmail.com xxx
10292 shirish 2333604 shirish@yahoo.com ddsds
10292 sonali 323232 sonali@bolly.com filmstar
select * from t1 where user_id>=10292;
user_id name phone ref_email detail
10292 sanjeev 29153373 sansh777@hotmail.com xxx
10292 shirish 2333604 shirish@yahoo.com ddsds
10292 sonali 323232 sonali@bolly.com filmstar
10293 shirish 2333604 shirish@yahoo.com ddsds
select * from t1 where user_id>10292;
user_id name phone ref_email detail
10293 shirish 2333604 shirish@yahoo.com ddsds
select * from t1 where user_id<10292;
user_id name phone ref_email detail
10291 sanjeev 29153373 sansh777@hotmail.com xxx
drop table t1;
CREATE TABLE t1 (a int not null, b int not null,c int not null,
key(a),primary key(a,b), unique(c),key(a),unique(b));
show index from t1;
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 NULL NULL NULL BTREE
t1 0 PRIMARY 2 b A 0 NULL NULL BTREE
t1 0 c 1 c A 0 NULL NULL BTREE
t1 0 b 1 b A 0 NULL NULL BTREE
t1 1 a 1 a A NULL NULL NULL BTREE
t1 1 a_2 1 a A NULL NULL NULL BTREE
drop table t1;
create table t1 (col1 int not null, col2 char(4) not null, primary key(col1));
alter table t1 engine=BDB;
insert into t1 values ('1','1'),('5','2'),('2','3'),('3','4'),('4','4');
select * from t1;
col1 col2
1 1
2 3
3 4
4 4
5 2
update t1 set col2='7' where col1='4';
select * from t1;
col1 col2
1 1
2 3
3 4
4 7
5 2
alter table t1 add co3 int not null;
select * from t1;
col1 col2 co3
1 1 0
2 3 0
3 4 0
4 7 0
5 2 0
update t1 set col2='9' where col1='2';
select * from t1;
col1 col2 co3
1 1 0
2 9 0
3 4 0
4 7 0
5 2 0
drop table t1;
create table t1 (a int not null , b int, primary key (a)) engine = BDB;
create table t2 (a int not null , b int, primary key (a)) engine = myisam;
insert into t1 VALUES (1,3) , (2,3), (3,3);
select * from t1;
a b
1 3
2 3
3 3
insert into t2 select * from t1;
select * from t2;
a b
1 3
2 3
3 3
delete from t1 where b = 3;
select * from t1;
a b
insert into t1 select * from t2;
select * from t1;
a b
1 3
2 3
3 3
select * from t2;
a b
1 3
2 3
3 3
drop table t1,t2;
CREATE TABLE t1 (
id int(11) NOT NULL auto_increment,
ggid varchar(32) binary DEFAULT '' NOT NULL,
email varchar(64) DEFAULT '' NOT NULL,
passwd varchar(32) binary DEFAULT '' NOT NULL,
PRIMARY KEY (id),
UNIQUE ggid (ggid)
) ENGINE=BDB;
insert into t1 (ggid,passwd) values ('test1','xxx');
insert into t1 (ggid,passwd) values ('test2','yyy');
insert into t1 (ggid,passwd) values ('test2','this will fail');
ERROR 23000: Duplicate entry 'test2' for key 2
insert into t1 (ggid,id) values ('this will fail',1);
ERROR 23000: Duplicate entry '1' for key 1
select * from t1 where ggid='test1';
id ggid email passwd
1 test1 xxx
select * from t1 where passwd='xxx';
id ggid email passwd
1 test1 xxx
select * from t1 where id=2;
id ggid email passwd
2 test2 yyy
replace into t1 (ggid,id) values ('this will work',1);
replace into t1 (ggid,passwd) values ('test2','this will work');
update t1 set id=100,ggid='test2' where id=1;
ERROR 23000: Duplicate entry 'test2' for key 2
select * from t1;
id ggid email passwd
1 this will work
3 test2 this will work
select * from t1 where id=1;
id ggid email passwd
1 this will work
select * from t1 where id=999;
id ggid email passwd
drop table t1;
CREATE TABLE t1 (
user_name varchar(12),
password text,
subscribed char(1),
user_id int(11) DEFAULT '0' NOT NULL,
quota bigint(20),
weight double,
access_date date,
access_time time,
approved datetime,
dummy_primary_key int(11) NOT NULL auto_increment,
PRIMARY KEY (dummy_primary_key)
) ENGINE=BDB;
INSERT INTO t1 VALUES ('user_0','somepassword','N',0,0,0,'2000-09-07','23:06:59','2000-09-07 23:06:59',1);
INSERT INTO t1 VALUES ('user_1','somepassword','Y',1,1,1,'2000-09-07','23:06:59','2000-09-07 23:06:59',2);
INSERT INTO t1 VALUES ('user_2','somepassword','N',2,2,1.4142135623731,'2000-09-07','23:06:59','2000-09-07 23:06:59',3);
INSERT INTO t1 VALUES ('user_3','somepassword','Y',3,3,1.7320508075689,'2000-09-07','23:06:59','2000-09-07 23:06:59',4);
INSERT INTO t1 VALUES ('user_4','somepassword','N',4,4,2,'2000-09-07','23:06:59','2000-09-07 23:06:59',5);
select user_name, password , subscribed, user_id, quota, weight, access_date, access_time, approved, dummy_primary_key from t1 order by user_name;
user_name password subscribed user_id quota weight access_date access_time approved dummy_primary_key
user_0 somepassword N 0 0 0 2000-09-07 23:06:59 2000-09-07 23:06:59 1
user_1 somepassword Y 1 1 1 2000-09-07 23:06:59 2000-09-07 23:06:59 2
user_2 somepassword N 2 2 1.4142135623731 2000-09-07 23:06:59 2000-09-07 23:06:59 3
user_3 somepassword Y 3 3 1.7320508075689 2000-09-07 23:06:59 2000-09-07 23:06:59 4
user_4 somepassword N 4 4 2 2000-09-07 23:06:59 2000-09-07 23:06:59 5
drop table t1;
CREATE TABLE t1 (
id int(11) NOT NULL auto_increment,
parent_id int(11) DEFAULT '0' NOT NULL,
level tinyint(4) DEFAULT '0' NOT NULL,
KEY (id),
KEY parent_id (parent_id),
KEY level (level)
) engine=bdb;
INSERT INTO t1 VALUES (1,0,0),(3,1,1),(4,1,1),(8,2,2),(9,2,2),(17,3,2),(22,4,2),(24,4,2),(28,5,2),(29,5,2),(30,5,2),(31,6,2),(32,6,2),(33,6,2),(203,7,2),(202,7,2),(20,3,2),(157,0,0),(193,5,2),(40,7,2),(2,1,1),(15,2,2),(6,1,1),(34,6,2),(35,6,2),(16,3,2),(7,1,1),(36,7,2),(18,3,2),(26,5,2),(27,5,2),(183,4,2),(38,7,2),(25,5,2),(37,7,2),(21,4,2),(19,3,2),(5,1,1);
INSERT INTO t1 values (179,5,2);
update t1 set parent_id=parent_id+100;
select * from t1 where parent_id=102;
id parent_id level
8 102 2
9 102 2
15 102 2
update t1 set id=id+1000;
update t1 set id=1024 where id=1009;
select * from t1;
id parent_id level
1001 100 0
1003 101 1
1004 101 1
1008 102 2
1024 102 2
1017 103 2
1022 104 2
1024 104 2
1028 105 2
1029 105 2
1030 105 2
1031 106 2
1032 106 2
1033 106 2
1203 107 2
1202 107 2
1020 103 2
1157 100 0
1193 105 2
1040 107 2
1002 101 1
1015 102 2
1006 101 1
1034 106 2
1035 106 2
1016 103 2
1007 101 1
1036 107 2
1018 103 2
1026 105 2
1027 105 2
1183 104 2
1038 107 2
1025 105 2
1037 107 2
1021 104 2
1019 103 2
1005 101 1
1179 105 2
update ignore t1 set id=id+1;
select * from t1;
id parent_id level
1002 100 0
1004 101 1
1005 101 1
1009 102 2
1025 102 2
1018 103 2
1023 104 2
1025 104 2
1029 105 2
1030 105 2
1031 105 2
1032 106 2
1033 106 2
1034 106 2
1204 107 2
1203 107 2
1021 103 2
1158 100 0
1194 105 2
1041 107 2
1003 101 1
1016 102 2
1007 101 1
1035 106 2
1036 106 2
1017 103 2
1008 101 1
1037 107 2
1019 103 2
1027 105 2
1028 105 2
1184 104 2
1039 107 2
1026 105 2
1038 107 2
1022 104 2
1020 103 2
1006 101 1
1180 105 2
update ignore t1 set id=1023 where id=1010;
select * from t1 where parent_id=102;
id parent_id level
1009 102 2
1025 102 2
1016 102 2
explain select level from t1 where level=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref level level 1 const 1 Using where; Using index
select level,id from t1 where level=1;
level id
1 1004
1 1005
1 1003
1 1007
1 1008
1 1006
select level,id,parent_id from t1 where level=1;
level id parent_id
1 1004 101
1 1005 101
1 1003 101
1 1007 101
1 1008 101
1 1006 101
select level,id from t1 where level=1 order by id;
level id
1 1003
1 1004
1 1005
1 1006
1 1007
1 1008
delete from t1 where level=1;
select * from t1;
id parent_id level
1002 100 0
1009 102 2
1025 102 2
1018 103 2
1023 104 2
1025 104 2
1029 105 2
1030 105 2
1031 105 2
1032 106 2
1033 106 2
1034 106 2
1204 107 2
1203 107 2
1021 103 2
1158 100 0
1194 105 2
1041 107 2
1016 102 2
1035 106 2
1036 106 2
1017 103 2
1037 107 2
1019 103 2
1027 105 2
1028 105 2
1184 104 2
1039 107 2
1026 105 2
1038 107 2
1022 104 2
1020 103 2
1180 105 2
drop table t1;
CREATE TABLE t1 (
sca_code char(6) NOT NULL,
cat_code char(6) NOT NULL,
sca_desc varchar(50),
lan_code char(2) NOT NULL,
sca_pic varchar(100),
sca_sdesc varchar(50),
sca_sch_desc varchar(16),
PRIMARY KEY (sca_code, cat_code, lan_code),
INDEX sca_pic (sca_pic)
) engine = bdb ;
INSERT INTO t1 ( sca_code, cat_code, sca_desc, lan_code, sca_pic, sca_sdesc, sca_sch_desc) VALUES ( 'PD', 'J', 'PENDANT', 'EN', NULL, NULL, 'PENDANT'),( 'RI', 'J', 'RING', 'EN', NULL, NULL, 'RING'),( 'QQ', 'N', 'RING', 'EN', 'not null', NULL, 'RING');
select count(*) from t1 where sca_code = 'PD';
count(*)
1
select count(*) from t1 where sca_code <= 'PD';
count(*)
1
select count(*) from t1 where sca_pic is null;
count(*)
2
alter table t1 drop index sca_pic, add index sca_pic (cat_code, sca_pic);
select count(*) from t1 where sca_code='PD' and sca_pic is null;
count(*)
1
select count(*) from t1 where cat_code='E';
count(*)
0
alter table t1 drop index sca_pic, add index (sca_pic, cat_code);
select count(*) from t1 where sca_code='PD' and sca_pic is null;
count(*)
1
select count(*) from t1 where sca_pic >= 'n';
count(*)
1
select sca_pic from t1 where sca_pic is null;
sca_pic
NULL
NULL
update t1 set sca_pic="test" where sca_pic is null;
delete from t1 where sca_code='pd';
drop table t1;
set @a:=now();
CREATE TABLE t1 (a int not null, b timestamp not null, primary key (a)) engine=bdb;
insert into t1 (a) values(1),(2),(3);
select t1.a from t1 natural join t1 as t2 where t1.b >= @a order by t1.a;
a
1
2
3
update t1 set a=5 where a=1;
select a from t1;
a
2
3
5
drop table t1;
flush logs;
create table t1 (b blob, i int, key (b(100)), key (i), key (i, b(20))) engine=bdb;
insert into t1 values ('this is a blob', 1), (null, -1), (null, null),("",1),("",2),("",3);
select b from t1 where b = 'this is a blob';
b
this is a blob
select * from t1 where b like 't%';
b i
this is a blob 1
select b, i from t1 where b is not null;
b i
this is a blob 1
1
2
3
select * from t1 where b is null and i > 0;
b i
select * from t1 where i is NULL;
b i
NULL NULL
update t1 set b='updated' where i=1;
select * from t1;
b i
updated 1
NULL -1
NULL NULL
updated 1
2
3
drop table t1;
create table t1 (a varchar(100) not null, primary key(a), b int not null) engine=bdb;
insert into t1 values("hello",1),("world",2);
select * from t1 order by b desc;
a b
world 2
hello 1
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize 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 0 PRIMARY 1 a A 2 NULL NULL BTREE
drop table t1;
create table t1 (i int, j int )ENGINE=BDB;
insert into t1 values (1,2);
select * from t1 where i=1 and j=2;
i j
1 2
create index ax1 on t1 (i,j);
select * from t1 where i=1 and j=2;
i j
1 2
drop table t1;
create table t1
(
branch_id int auto_increment primary key,
branch_name varchar(255) not null,
branch_active int not null default 1,
unique branch_name(branch_name),
index branch_active(branch_active)
) engine=bdb;
create table t2
(
target_id int auto_increment primary key,
target_name varchar(255) not null,
target_active int not null default 1,
unique target_name(target_name),
index target_active(target_active)
) engine=bdb;
create table t3
(
platform_id int auto_increment primary key,
platform_name varchar(255) not null,
platform_active int not null default 1,
unique platform_name(platform_name),
index platform_active(platform_active)
) engine=bdb;
create table t4
(
product_id int auto_increment primary key,
product_name varchar(255) not null,
version_file varchar(255) not null,
product_active int not null default 1,
unique product_name(product_name),
index product_active(product_active)
) engine=bdb;
create table t5
(
product_file_id int auto_increment primary key,
product_id int not null,
file_name varchar(255) not null,
/* cvs module used to find the file version */
module_name varchar(255) not null,
/* flag whether the file is still included in the product */
file_included int not null default 1,
unique product_file(product_id,file_name),
index file_included(file_included)
) engine=bdb;
create table t6
(
file_platform_id int auto_increment primary key,
product_file_id int not null,
platform_id int not null,
branch_id int not null,
/* filename in the build system */
build_filename varchar(255) not null,
/* default filename in the build archive */
archive_filename varchar(255) not null,
unique file_platform(product_file_id,platform_id,branch_id)
) engine=bdb;
create table t8
(
archive_id int auto_increment primary key,
branch_id int not null,
target_id int not null,
platform_id int not null,
product_id int not null,
status_id int not null default 1,
unique archive(branch_id,target_id,platform_id,product_id),
index status_id(status_id)
) engine=bdb;
create table t7
(
build_id int auto_increment primary key,
branch_id int not null,
target_id int not null,
build_number int not null,
build_date date not null,
/* build system tag, e.g. 'rmanight-022301-1779' */
build_tag varchar(255) not null,
/* path relative to the build archive root, e.g. 'current' */
build_path text not null,
unique build(branch_id,target_id,build_number)
) engine=bdb;
insert into t1 (branch_name)
values ('RealMedia');
insert into t1 (branch_name)
values ('RP8REV');
insert into t1 (branch_name)
values ('SERVER_8_0_GOLD');
insert into t2 (target_name)
values ('rmanight');
insert into t2 (target_name)
values ('playerall');
insert into t2 (target_name)
values ('servproxyall');
insert into t3 (platform_name)
values ('linux-2.0-libc6-i386');
insert into t3 (platform_name)
values ('win32-i386');
insert into t4 (product_name, version_file)
values ('realserver', 'servinst');
insert into t4 (product_name, version_file)
values ('realproxy', 'prxyinst');
insert into t4 (product_name, version_file)
values ('realplayer', 'playinst');
insert into t4 (product_name, version_file)
values ('plusplayer', 'plusinst');
create temporary table tmp1
select branch_id, target_id, platform_id, product_id
from t1, t2, t3, t4 ;
create temporary table tmp2
select tmp1.branch_id, tmp1.target_id, tmp1.platform_id, tmp1.product_id
from tmp1 left join t8
using (branch_id,target_id,platform_id,product_id)
where t8.archive_id is null ;
insert into t8
(branch_id, target_id, platform_id, product_id, status_id)
select branch_id, target_id, platform_id, product_id, 1
from tmp2 ;
drop table tmp1 ;
drop table tmp2 ;
insert into t5 (product_id, file_name, module_name)
values (1, 'servinst', 'server');
insert into t5 (product_id, file_name, module_name)
values (2, 'prxyinst', 'server');
insert into t5 (product_id, file_name, module_name)
values (3, 'playinst', 'rpapp');
insert into t5 (product_id, file_name, module_name)
values (4, 'plusinst', 'rpapp');
insert into t6
(product_file_id,platform_id,branch_id,build_filename,archive_filename)
values (1, 2, 3, 'servinst.exe', 'win32-servinst.exe');
insert into t6
(product_file_id,platform_id,branch_id,build_filename,archive_filename)
values (1, 1, 3, 'v80_linux-2.0-libc6-i386_servinst.bin', 'linux2-servinst.exe');
insert into t6
(product_file_id,platform_id,branch_id,build_filename,archive_filename)
values (3, 2, 2, 'playinst.exe', 'win32-playinst.exe');
insert into t6
(product_file_id,platform_id,branch_id,build_filename,archive_filename)
values (4, 2, 2, 'playinst.exe', 'win32-playinst.exe');
insert into t7
(branch_id,target_id,build_number,build_tag,build_date,build_path)
values (2, 2, 1071, 'playerall-022101-1071', '2001-02-21', 'current');
insert into t7
(branch_id,target_id,build_number,build_tag,build_date,build_path)
values (2, 2, 1072, 'playerall-022201-1072', '2001-02-22', 'current');
insert into t7
(branch_id,target_id,build_number,build_tag,build_date,build_path)
values (3, 3, 388, 'servproxyall-022201-388', '2001-02-22', 'current');
insert into t7
(branch_id,target_id,build_number,build_tag,build_date,build_path)
values (3, 3, 389, 'servproxyall-022301-389', '2001-02-23', 'current');
insert into t7
(branch_id,target_id,build_number,build_tag,build_date,build_path)
values (4, 4, 100, 'foo target-010101-100', '2001-01-01', 'current');
update t8
set status_id=2
where branch_id=2 and target_id=2 and platform_id=2 and product_id=1;
select t7.build_path
from
t1,
t7,
t2,
t3,
t4,
t5,
t6
where
t7.branch_id = t1.branch_id and
t7.target_id = t2.target_id and
t5.product_id = t4.product_id and
t6.product_file_id = t5.product_file_id and
t6.platform_id = t3.platform_id and
t6.branch_id = t6.branch_id and
t7.build_id = 1 and
t4.product_id = 3 and
t5.file_name = 'playinst' and
t3.platform_id = 2;
build_path
current
drop table t1, t2, t3, t4, t5, t6, t7, t8;
CREATE TABLE t1 (
a tinytext NOT NULL,
b tinyint(3) unsigned NOT NULL default '0',
PRIMARY KEY (a(32),b)
) ENGINE=BDB;
INSERT INTO t1 VALUES ('a',1),('a',2);
SELECT * FROM t1 WHERE a='a' AND b=2;
a b
a 2
SELECT * FROM t1 WHERE a='a' AND b in (2);
a b
a 2
SELECT * FROM t1 WHERE a='a' AND b in (1,2);
a b
a 1
a 2
drop table t1;
CREATE TABLE t1 (
a int3 unsigned NOT NULL,
b int1 unsigned NOT NULL,
UNIQUE (a, b)
) ENGINE = BDB;
INSERT INTO t1 VALUES (1, 1);
SELECT MIN(B),MAX(b) FROM t1 WHERE t1.a = 1;
MIN(B) MAX(b)
1 1
drop table t1;
create table t1 (id int NOT NULL,id2 int NOT NULL,id3 int NOT NULL,dummy1 char(30),primary key (id,id2),index index_id3 (id3)) engine=bdb;
insert into t1 values (0,0,0,'ABCDEFGHIJ'),(2,2,2,'BCDEFGHIJK'),(1,1,1,'CDEFGHIJKL');
LOCK TABLES t1 WRITE;
insert into t1 values (99,1,2,'D'),(1,1,2,'D');
ERROR 23000: Duplicate entry '1-1' for key 1
select id from t1;
id
0
1
2
select id from t1;
id
0
1
2
UNLOCK TABLES;
DROP TABLE t1;
create table t1 (id int NOT NULL,id2 int NOT NULL,id3 int NOT NULL,dummy1 char(30),primary key (id,id2),index index_id3 (id3)) engine=bdb;
insert into t1 values (0,0,0,'ABCDEFGHIJ'),(2,2,2,'BCDEFGHIJK'),(1,1,1,'CDEFGHIJKL');
LOCK TABLES t1 WRITE;
begin;
insert into t1 values (99,1,2,'D'),(1,1,2,'D');
ERROR 23000: Duplicate entry '1-1' for key 1
select id from t1;
id
0
1
2
insert ignore into t1 values (100,1,2,'D'),(1,1,99,'D');
commit;
select id,id3 from t1;
id id3
0 0
1 1
2 2
100 2
UNLOCK TABLES;
DROP TABLE t1;
CREATE TABLE t1 (SYAIN_NO char(5) NOT NULL default '', KINMU_DATE char(6) NOT NULL default '', PRIMARY KEY (SYAIN_NO,KINMU_DATE)) ENGINE=BerkeleyDB;
CREATE TABLE t2 ( SYAIN_NO char(5) NOT NULL default '',STR_DATE char(8) NOT NULL default '',PRIMARY KEY (SYAIN_NO,STR_DATE) ) ENGINE=BerkeleyDB;
select T1.KINMU_DATE from t1 T1 ,t2 T2 where T1.SYAIN_NO = '12345' and T1.KINMU_DATE = '200106' and T2.SYAIN_NO = T1.SYAIN_NO;
KINMU_DATE
select T1.KINMU_DATE from t1 T1 ,t2 T2 where T1.SYAIN_NO = '12345' and T1.KINMU_DATE = '200106' and T2.SYAIN_NO = T1.SYAIN_NO;
KINMU_DATE
DROP TABLE t1,t2;
create table t1 (a int(11) not null, b int(11) not null, unique (a,b)) engine=bdb;
insert into t1 values (1,1), (1,2);
select * from t1 where a = 1;
a b
1 1
1 2
select t1.*, t2.* from t1, t1 t2 where t1.a = t2.a and t2.a = 1;
a b a b
1 1 1 1
1 1 1 2
1 2 1 1
1 2 1 2
select * from t1 where a = 1;
a b
1 1
1 2
drop table t1;
create table t1 (id int NOT NULL,id2 int NOT NULL,id3 int NOT NULL,dummy1 char(30),primary key (id,id2),index index_id3 (id3)) engine=bdb;
insert into t1 values (0,0,0,'ABCDEFGHIJ');
create table t2 (id int NOT NULL,primary key (id)) engine=bdb;
LOCK TABLES t1 WRITE, t2 WRITE;
insert into t2 values(1);
SELECT t1.* FROM t1 WHERE id IN (1);
id id2 id3 dummy1
SELECT t1.* FROM t2 left outer join t1 on (t1.id=t2.id);
id id2 id3 dummy1
NULL NULL NULL NULL
delete from t1 where id3 >= 0 and id3 <= 0;
drop table t1,t2;
CREATE TABLE t1 (i varchar(48) NOT NULL default '', p varchar(255) default NULL,s varchar(48) NOT NULL default '', PRIMARY KEY (i), UNIQUE(p,s)) ENGINE=BDB;
INSERT INTO t1 VALUES ('00000000-e6c4ddeaa6-003b8-83458387','programs/xxxxxxxx.wmv','00000000-e6c4ddeb32-003bc-83458387');
SELECT * FROM t1 WHERE p='programs/xxxxxxxx.wmv';
i p s
00000000-e6c4ddeaa6-003b8-83458387 programs/xxxxxxxx.wmv 00000000-e6c4ddeb32-003bc-83458387
drop table t1;
CREATE TABLE t1 ( STR_DATE varchar(8) NOT NULL default '',INFO_NOTE varchar(200) default NULL,PRIMARY KEY (STR_DATE) ) ENGINE=BerkeleyDB;
select INFO_NOTE from t1 where STR_DATE = '20010610';
INFO_NOTE
select INFO_NOTE from t1 where STR_DATE < '20010610';
INFO_NOTE
select INFO_NOTE from t1 where STR_DATE > '20010610';
INFO_NOTE
drop table t1;
create table t1 (a int not null, b int, primary key (a)) engine =bdb;
create table t2 (a int not null, b int, primary key (a)) engine =bdb;
insert into t1 values (2, 3),(1, 7),(10, 7);
insert into t2 values (2, 3),(1, 7),(10, 7);
select * from t1;
a b
1 7
2 3
10 7
select * from t2;
a b
1 7
2 3
10 7
delete t1, t2 from t1, t2 where t1.a = t2.a;
select * from t1;
a b
select * from t2;
a b
select * from t2;
a b
drop table t1,t2;
create table t1 (x int not null, index(x)) engine=bdb;
insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
select * from t1 where x <= 10 and x >= 7;
x
7
8
9
10
select * from t1 where x <= 10 and x >= 7 order by x;
x
7
8
9
10
select * from t1 where x <= 10 and x >= 7 order by x desc;
x
10
9
8
7
select * from t1 where x <= 8 and x >= 5 order by x desc;
x
8
7
6
5
select * from t1 where x < 8 and x > 5 order by x desc;
x
7
6
drop table t1;
create table t1 ( c char(8) not null ) engine=bdb;
insert into t1 values ('0'),('1'),('2'),('3'),('4'),('5'),('6'),('7'),('8'),('9');
insert into t1 values ('A'),('B'),('C'),('D'),('E'),('F');
alter table t1 add b char(8) not null;
alter table t1 add a char(8) not null;
alter table t1 add primary key (a,b,c);
update t1 set a=c, b=c;
create table t2 (c char(8) not null, b char(8) not null, a char(8) not null, primary key(a,b,c)) engine=bdb;
insert into t2 select * from t1;
delete t1,t2 from t2,t1 where t1.a<'B' and t2.b=t1.b;
drop table t1,t2;
create table t1 (a char(10), key(a), b int not null, key(b)) engine=bdb;
insert into t1 values ('a',1),('A',2);
explain select a from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
select a from t1;
a
a
A
explain select b from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 4 NULL 2 Using index
select b from t1;
b
1
2
alter table t1 modify a char(10) binary;
explain select a from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL a 11 NULL 2 Using index
select a from t1;
a
A
a
drop table t1;
create table t1(
pk1 text not null, pk2 text not null, pk3 char(4),
key1 int, key2 int,
primary key(pk1(4), pk2(4), pk3), key(key1), key(key2)
) engine=bdb;
insert into t1 values (concat('aaa-', repeat('A', 4000)),
concat('eee-', repeat('e', 4000)), 'a++a', 1, 1);
insert into t1 values (concat('bbb-', repeat('B', 4000)),
concat('ggg-', repeat('G', 4000)), 'b++b', 1, 1);
select substring(pk1, 1, 4), substring(pk1, 4001),
substring(pk2, 1, 4), substring(pk2, 4001), pk3, key1, key2
from t1 force index(key1, key2) where key1 < 3 or key2 < 3;
substring(pk1, 1, 4) substring(pk1, 4001) substring(pk2, 1, 4) substring(pk2, 4001) pk3 key1 key2
aaa- AAAA eee- eeee a++a 1 1
bbb- BBBB ggg- GGGG b++b 1 1
drop table t1;
create table t1 (
pk1 varchar(8) not null default '',
pk2 varchar(4) not null default '',
key1 int(11) default null,
key2 int(11) default null,
primary key (pk1,pk2),
key key1 (key1),
key key2 (key2)) engine=bdb;
insert into t1 values ('','empt',2,2), ('a','a--a',2,2),
('bb','b--b',2,2), ('ccc','c--c',2,2), ('dddd','d--d',2,2);
select * from t1 force index(key1, key2) where key1 < 3 or key2 < 3;
pk1 pk2 key1 key2
empt 2 2
a a--a 2 2
bb b--b 2 2
ccc c--c 2 2
dddd d--d 2 2
drop table t1;
set autocommit=0;
create table t1(b varchar(30)) engine=bdb;
insert into t1 values ('one');
commit;
select b FROM t1 outer_table where
exists (select 'two' from t1 where 'two' = outer_table.b);
b
drop table t1;
set autocommit=1;
create table t1(a int primary key, b varchar(30)) engine=bdb;
insert into t1 values (1,'one'), (2,'two'), (3,'three'), (4,'four');
create table t2 like t1;
insert t2 select * from t1;
select a from t1 where a in (select a from t2);
a
1
2
3
4
delete from t2;
insert into t2 (a, b)
select a, b from t1 where (a, b) in (select a, b from t1);
select * from t2;
a b
1 one
2 two
3 three
4 four
drop table t1, t2;
create table t1 (a int, b varchar(30), primary key(a)) engine = bdb;
insert into t1 values (1,'one');
commit;
truncate t1;
select * from t1;
a b
drop table t1;
SET NAMES utf8;
create table t1 (a varchar(255) character set utf8) engine=bdb;
set @a:= convert(repeat(_latin1 0xFF, 255) using utf8);
insert into t1 values (@a);
select a, length(a), char_length(a) from t1;
a length(a) char_length(a)
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ 510 255
drop table t1;
SET NAMES latin1;
CREATE TABLE t1 (
id int unsigned NOT NULL auto_increment,
list_id smallint unsigned NOT NULL,
term TEXT NOT NULL,
PRIMARY KEY(id),
INDEX(list_id, term(4))
) ENGINE=BDB CHARSET=utf8;
INSERT INTO t1 SET list_id = 1, term = "letterc";
INSERT INTO t1 SET list_id = 1, term = "letterb";
INSERT INTO t1 SET list_id = 1, term = "lettera";
INSERT INTO t1 SET list_id = 1, term = "letterd";
SELECT id FROM t1 WHERE (list_id = 1) AND (term = "letterc");
id
1
SELECT id FROM t1 WHERE (list_id = 1) AND (term = "letterb");
id
2
SELECT id FROM t1 WHERE (list_id = 1) AND (term = "lettera");
id
3
SELECT id FROM t1 WHERE (list_id = 1) AND (term = "letterd");
id
4
DROP TABLE t1;
create table t1 (a int, key(a)) engine=bdb;
create table t2 (b int, key(b)) engine=bdb;
insert into t1 values (1),(1),(2),(3),(4);
insert into t2 values (1),(5),(6),(7);
delete from t1 where (a in (select b from t2));
select count(*) from t1;
count(*)
3
insert into t1 set a=(select b from t2);
ERROR 21000: Subquery returns more than 1 row
select count(*) from t1;
count(*)
3
update t1 set a = a + 1 where (a in (select b from t2));
select count(*) from t1;
count(*)
3
drop table t1, t2;
End of 4.1 tests
|