summaryrefslogtreecommitdiff
path: root/mysql-test/r/union.result
blob: 93e84c731fe6fb7c64b2f94a2d97c6818bc7902c (plain)
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
1306
1307
1308
1309
1310
1311
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
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
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
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
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
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
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
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
drop table if exists t1,t2,t3,t4,t5,t6;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
select a,b from t1 union distinct select a,b from t2;
a	b
1	a
2	b
3	c
4	d
5	f
6	e
select a,b from t1 union all select a,b from t2;
a	b
1	a
2	b
3	c
3	c
3	c
4	d
5	f
6	e
select a,b from t1 union all select a,b from t2 order by b;
a	b
1	a
2	b
3	c
3	c
3	c
4	d
6	e
5	f
select a,b from t1 union all select a,b from t2 union select 7,'g';
a	b
1	a
2	b
3	c
4	d
5	f
6	e
7	g
select 0,'#' union select a,b from t1 union all select a,b from t2 union select 7,'gg';
0	#
0	#
1	a
2	b
3	c
4	d
5	f
6	e
7	gg
select a,b from t1 union select a,b from t1;
a	b
1	a
2	b
3	c
select 't1',b,count(*) from t1 group by b UNION select 't2',b,count(*) from t2 group by b;
t1	b	count(*)
t1	a	1
t1	b	1
t1	c	2
t2	c	1
t2	d	1
t2	e	1
t2	f	1
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a) limit 4;
a	b
1	a
2	b
3	c
4	d
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1);
a	b
1	a
2	b
3	c
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by b desc;
a	b
3	c
2	b
1	a
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by t1.b;
ERROR 42000: Table 't1' from one of the SELECTs cannot be used in global ORDER clause
explain extended (select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by b desc;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	100.00	
2	UNION	t2	ALL	NULL	NULL	NULL	NULL	4	100.00	Using filesort
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using filesort
Warnings:
Note	1003	(select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` limit 2) union all (select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`a` limit 1) order by `b` desc
(select sql_calc_found_rows  a,b from t1 limit 2)  union all (select a,b from t2 order by a) limit 2;
a	b
1	a
2	b
select found_rows();
found_rows()
6
select sql_calc_found_rows  a,b from t1  union all select a,b from t2 limit 2;
a	b
1	a
2	b
select found_rows();
found_rows()
8
explain select a,b from t1 union all select a,b from t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
2	UNION	t2	ALL	NULL	NULL	NULL	NULL	4	
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
explain select xx from t1 union select 1;
ERROR 42S22: Unknown column 'xx' in 'field list'
explain select a,b from t1 union select 1;
ERROR 21000: The used SELECT statements have a different number of columns
explain select 1 union select a,b from t1 union select 1;
ERROR 21000: The used SELECT statements have a different number of columns
explain select a,b from t1 union select 1 limit 0;
ERROR 21000: The used SELECT statements have a different number of columns
select a,b from t1 into outfile 'skr' union select a,b from t2;
ERROR HY000: Incorrect usage of UNION and INTO
select a,b from t1 order by a union select a,b from t2;
ERROR HY000: Incorrect usage of UNION and ORDER BY
insert into t3 select a from t1 order by a union select a from t2;
ERROR HY000: Incorrect usage of UNION and ORDER BY
create table t3 select a,b from t1 union select a from t2;
ERROR 21000: The used SELECT statements have a different number of columns
select a,b from t1 union select a from t2;
ERROR 21000: The used SELECT statements have a different number of columns
select * from t1 union select a from t2;
ERROR 21000: The used SELECT statements have a different number of columns
select a from t1 union select * from t2;
ERROR 21000: The used SELECT statements have a different number of columns
select * from t1 union select SQL_BUFFER_RESULT * from t2;
ERROR 42000: Incorrect usage/placement of 'SQL_BUFFER_RESULT'
create table t3 select a,b from t1 union all select a,b from t2;
insert into t3 select a,b from t1 union all select a,b from t2;
replace into t3 select a,b as c from t1 union all select a,b from t2;
drop table t1,t2,t3;
select * union select 1;
ERROR HY000: No tables used
select 1 as a,(select a union select a);
a	(select a union select a)
1	1
(select 1) union (select 2) order by 0;
ERROR 42S22: Unknown column '0' in 'order clause'
SELECT @a:=1 UNION SELECT @a:=@a+1;
@a:=1
1
2
(SELECT 1) UNION (SELECT 2) ORDER BY (SELECT a);
ERROR 42S22: Unknown column 'a' in 'field list'
(SELECT 1,3) UNION (SELECT 2,1) ORDER BY (SELECT 2);
1	3
1	3
2	1
CREATE TABLE t1 (
`pseudo` char(35) NOT NULL default '',
`pseudo1` char(35) NOT NULL default '',
`same` tinyint(1) unsigned NOT NULL default '1',
PRIMARY KEY  (`pseudo1`),
KEY `pseudo` (`pseudo`)
) ENGINE=MyISAM;
INSERT INTO t1 (pseudo,pseudo1,same) VALUES ('joce', 'testtt', 1),('joce', 'tsestset', 1),('dekad', 'joce', 1);
SELECT pseudo FROM t1 WHERE pseudo1='joce' UNION SELECT pseudo FROM t1 WHERE pseudo='joce';
pseudo
dekad
joce
SELECT pseudo1 FROM t1 WHERE pseudo1='joce' UNION SELECT pseudo1 FROM t1 WHERE pseudo='joce';
pseudo1
joce
testtt
tsestset
SELECT * FROM t1 WHERE pseudo1='joce' UNION SELECT * FROM t1 WHERE pseudo='joce' order by pseudo desc,pseudo1 desc;
pseudo	pseudo1	same
joce	tsestset	1
joce	testtt	1
dekad	joce	1
SELECT pseudo1 FROM t1 WHERE pseudo='joce' UNION SELECT pseudo FROM t1 WHERE pseudo1='joce';
pseudo1
testtt
tsestset
dekad
SELECT pseudo1 FROM t1 WHERE pseudo='joce' UNION ALL SELECT pseudo FROM t1 WHERE pseudo1='joce';
pseudo1
testtt
tsestset
dekad
SELECT pseudo1 FROM t1 WHERE pseudo='joce' UNION SELECT 1;
pseudo1
testtt
tsestset
1
drop table t1;
create table t1 (a int);
create table t2 (a int);
insert into t1 values (1),(2),(3),(4),(5);
insert into t2 values (11),(12),(13),(14),(15);
(select * from t1 limit 2) union (select * from t2 limit 3) limit 4;
a
1
2
11
12
(select * from t1 limit 2) union (select * from t2 limit 3);
a
1
2
11
12
13
(select * from t1 limit 2) union (select * from t2 limit 20,3);
a
1
2
set SQL_SELECT_LIMIT=2;
(select * from t1 limit 1) union (select * from t2 limit 3);
a
1
11
set SQL_SELECT_LIMIT=DEFAULT;
drop table t1,t2;
CREATE TABLE t1 (
cid smallint(5) unsigned NOT NULL default '0',
cv varchar(250) NOT NULL default '',
PRIMARY KEY  (cid),
UNIQUE KEY cv (cv)
) ;
INSERT INTO t1 VALUES (8,'dummy');
CREATE TABLE t2 (
cid bigint(20) unsigned NOT NULL auto_increment,
cap varchar(255) NOT NULL default '',
PRIMARY KEY  (cid),
KEY cap (cap)
) ;
CREATE TABLE t3 (
gid bigint(20) unsigned NOT NULL auto_increment,
gn varchar(255) NOT NULL default '',
must tinyint(4) default NULL,
PRIMARY KEY  (gid),
KEY gn (gn)
) ;
INSERT INTO t3 VALUES (1,'V1',NULL);
CREATE TABLE t4 (
uid bigint(20) unsigned NOT NULL default '0',
gid bigint(20) unsigned default NULL,
rid bigint(20) unsigned default NULL,
cid bigint(20) unsigned default NULL,
UNIQUE KEY m (uid,gid,rid,cid),
KEY uid (uid),
KEY rid (rid),
KEY cid (cid),
KEY container (gid,rid,cid)
) ;
INSERT INTO t4 VALUES (1,1,NULL,NULL);
CREATE TABLE t5 (
rid bigint(20) unsigned NOT NULL auto_increment,
rl varchar(255) NOT NULL default '',
PRIMARY KEY  (rid),
KEY rl (rl)
) ;
CREATE TABLE t6 (
uid bigint(20) unsigned NOT NULL auto_increment,
un varchar(250) NOT NULL default '',
uc smallint(5) unsigned NOT NULL default '0',
PRIMARY KEY  (uid),
UNIQUE KEY nc (un,uc),
KEY un (un)
) ;
INSERT INTO t6 VALUES (1,'test',8);
SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test";
uid	rl	g1	cid	gg
1	NULL	V1	NULL	1
SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t3.must IS NOT NULL AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test";
uid	rl	g1	cid	gg
(SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t3.must IS NOT NULL AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test") UNION (SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test");
uid	rl	g1	cid	gg
1	NULL	V1	NULL	1
drop table t1,t2,t3,t4,t5,t6;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
create table t3 select a,b from t1 union select a,b from t2;
create table t4 (select a,b from t1) union (select a,b from t2) limit 2;
insert into  t4 select a,b from t1 union select a,b from t2;
insert into  t3 (select a,b from t1) union (select a,b from t2) limit 2;
select * from t3;
a	b
1	a
2	b
3	c
4	d
5	f
6	e
1	a
2	b
select * from t4;
a	b
1	a
2	b
1	a
2	b
3	c
4	d
5	f
6	e
drop table t1,t2,t3,t4;
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (a int);
insert into t2 values (3),(4),(5);
(SELECT SQL_CALC_FOUND_ROWS * FROM t1) UNION all (SELECT * FROM t2) LIMIT 1;
a
1
select found_rows();
found_rows()
6
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2) LIMIT 2;
a
1
3
select found_rows();
found_rows()
4
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2);
a
1
3
4
5
select found_rows();
found_rows()
4
(SELECT SQL_CALC_FOUND_ROWS * FROM t1) UNION all (SELECT * FROM t2 LIMIT 1);
a
1
2
3
3
select found_rows();
found_rows()
4
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION SELECT * FROM t2 LIMIT 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION all SELECT * FROM t2 LIMIT 2;
a
1
3
select found_rows();
found_rows()
6
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION all SELECT * FROM t2 LIMIT 2;
a
1
2
select found_rows();
found_rows()
6
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2;
a
1
2
select found_rows();
found_rows()
6
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 100;
a
1
2
3
4
5
select found_rows();
found_rows()
5
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 100 UNION SELECT * FROM t2;
a
1
2
3
4
5
select found_rows();
found_rows()
5
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2;
a
1
3
4
5
select found_rows();
found_rows()
6
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2 LIMIT 2;
a
1
3
select found_rows();
found_rows()
6
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2,2;
a
3
4
select found_rows();
found_rows()
5
SELECT SQL_CALC_FOUND_ROWS * FROM t1 limit 2,2 UNION SELECT * FROM t2;
a
3
4
5
select found_rows();
found_rows()
5
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a desc LIMIT 1;
a
5
(SELECT * FROM t1 ORDER by a) UNION ALL (SELECT * FROM t2 ORDER BY a) ORDER BY A desc LIMIT 4;
a
5
4
3
3
(SELECT * FROM t1) UNION all (SELECT SQL_CALC_FOUND_ROWS * FROM t2) LIMIT 1;
ERROR 42000: Incorrect usage/placement of 'SQL_CALC_FOUND_ROWS'
create temporary table t1 select a from t1 union select a from t2;
drop temporary table t1;
create table t1 select a from t1 union select a from t2;
ERROR 42S01: Table 't1' already exists
select a from t1 union select a from t2 order by t2.a;
ERROR 42S22: Unknown column 't2.a' in 'order clause'
drop table t1,t2;
select length(version()) > 1 as `*` UNION select 2;
*
1
2
create table t1 (a int);
insert into t1 values (0), (3), (1), (2);
explain (select * from t1) union (select * from t1) order by a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
2	UNION	t1	ALL	NULL	NULL	NULL	NULL	4	
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	Using filesort
drop table t1;
CREATE TABLE t1 (  id int(3) unsigned default '0') ENGINE=MyISAM;
INSERT INTO t1 (id) VALUES("1");
CREATE TABLE t2 ( id int(3) unsigned default '0',  id_master int(5) default '0',  text1 varchar(5) default NULL,  text2 varchar(5) default NULL) ENGINE=MyISAM;
INSERT INTO t2 (id, id_master, text1, text2) VALUES("1", "1",
"foo1", "bar1");
INSERT INTO t2 (id, id_master, text1, text2) VALUES("2", "1",
"foo2", "bar2");
INSERT INTO t2 (id, id_master, text1, text2) VALUES("3", "1", NULL,
"bar3");
INSERT INTO t2 (id, id_master, text1, text2) VALUES("4", "1",
"foo4", "bar4");
SELECT 1 AS id_master, 1 AS id, NULL AS text1, 'ABCDE' AS text2 UNION SELECT id_master, t2.id, text1, text2 FROM t1 LEFT JOIN t2 ON t1.id = t2.id_master;
id_master	id	text1	text2
1	1	NULL	ABCDE
1	1	foo1	bar1
1	2	foo2	bar2
1	3	NULL	bar3
1	4	foo4	bar4
SELECT 1 AS id_master, 1 AS id, 'ABCDE' AS text1, 'ABCDE' AS text2 UNION SELECT id_master, t2.id, text1, text2 FROM t1 LEFT JOIN t2 ON t1.id = t2.id_master;
id_master	id	text1	text2
1	1	ABCDE	ABCDE
1	1	foo1	bar1
1	2	foo2	bar2
1	3	NULL	bar3
1	4	foo4	bar4
drop table if exists t1,t2;
create table t1 (a int not null primary key auto_increment, b int, key(b));
create table t2 (a int not null primary key auto_increment, b int);
insert into t1 (b) values (1),(2),(2),(3);
insert into t2 (b) values (10),(11),(12),(13);
explain extended (select * from t1 where a=1) union (select * from t2 where a=1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	const	PRIMARY	PRIMARY	4	const	1	100.00	
2	UNION	t2	const	PRIMARY	PRIMARY	4	const	1	100.00	
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
Warnings:
Note	1003	(select 1 AS `a`,1 AS `b` from `test`.`t1` where 1) union (select 1 AS `a`,10 AS `b` from `test`.`t2` where 1)
(select * from t1 where a=5) union (select * from t2 where a=1);
a	b
1	10
(select * from t1 where a=5 and a=6) union (select * from t2 where a=1);
a	b
1	10
(select t1.a,t1.b from t1,t2 where t1.a=5) union (select * from t2 where a=1);
a	b
1	10
(select * from t1 where a=1) union (select t1.a,t2.a from t1,t2 where t1.a=t2.a);
a	b
1	1
2	2
3	3
4	4
explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t2.a from t1,t2 where t1.a=t2.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
2	UNION	t1	index	PRIMARY	PRIMARY	4	NULL	4	Using index
2	UNION	t2	index	PRIMARY	PRIMARY	4	NULL	4	Using where; Using index; Using join buffer (flat, BNL join)
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
explain (select * from t1 where a=1) union (select * from t1 where b=1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	const	PRIMARY	PRIMARY	4	const	1	
2	UNION	t1	ref	b	b	5	const	1	
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
drop table t1,t2;
create table t1 (   id int not null auto_increment, primary key (id)   ,user_name text );
create table t2 (    id int not null auto_increment, primary key (id)   ,group_name text );
create table t3 (    id int not null auto_increment, primary key (id)   ,user_id int   ,index user_idx (user_id)   ,foreign key (user_id) references users(id)   ,group_id int   ,index group_idx (group_id)   ,foreign key (group_id) references groups(id) );
insert into t1 (user_name) values ('Tester');
insert into t2 (group_name) values ('Group A');
insert into t2 (group_name) values ('Group B');
insert into t3 (user_id, group_id) values (1,1);
select 1 'is_in_group', a.user_name, c.group_name, b.id from t1 a, t3 b, t2 c where a.id = b.user_id and b.group_id = c.id UNION  select 0 'is_in_group', a.user_name, c.group_name, null from t1 a, t2 c;
is_in_group	user_name	group_name	id
1	Tester	Group A	1
0	Tester	Group A	NULL
0	Tester	Group B	NULL
drop table t1, t2, t3;
create table t1 (mat_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, matintnum CHAR(6) NOT NULL, test MEDIUMINT UNSIGNED NULL);
create table t2 (mat_id MEDIUMINT UNSIGNED NOT NULL, pla_id MEDIUMINT UNSIGNED NOT NULL);
insert into t1 values (NULL, 'a', 1), (NULL, 'b', 2), (NULL, 'c', 3), (NULL, 'd', 4), (NULL, 'e', 5), (NULL, 'f', 6), (NULL, 'g', 7), (NULL, 'h', 8), (NULL, 'i', 9);
insert into t2 values (1, 100), (1, 101), (1, 102), (2, 100), (2, 103), (2, 104), (3, 101), (3, 102), (3, 105);
SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id union SELECT 0, 0;
pla_id	matintnum
100	a
101	a
102	a
103	b
104	b
105	c
0	0
drop table t1, t2;
create table t1 SELECT "a" as a UNION select "aa" as a;
select * from t1;
a
a
aa
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` varchar(2) NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT 12 as a UNION select "aa" as a;
select * from t1;
a
12
aa
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` varchar(2) NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT 12 as a UNION select 12.2 as a;
select * from t1;
a
12.0
12.2
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` decimal(3,1) NOT NULL DEFAULT '0.0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t2 (it1 tinyint, it2 tinyint not null, i int not null, ib bigint, f float, d double, y year, da date, dt datetime, sc char(10), sv varchar(10), b blob, tx text);
insert into t2 values (NULL, 1, 3, 4, 1.5, 2.5, 1972, '1972-10-22', '1972-10-22 11:50', 'testc', 'testv', 'tetetetetest', 'teeeeeeeeeeeest');
create table t1 SELECT it2 from t2 UNION select it1 from t2;
select * from t1;
it2
1
NULL
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `it2` tinyint(4) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT it2 from t2 UNION select i from t2;
select * from t1;
it2
1
3
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `it2` int(11) NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT i from t2 UNION select f from t2;
select * from t1;
i
3
1.5
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` double DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT f from t2 UNION select d from t2;
select * from t1;
f
1.5
2.5
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f` double DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT ib from t2 UNION select f from t2;
select * from t1;
ib
4
1.5
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `ib` double DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT ib from t2 UNION select d from t2;
select * from t1;
ib
4
2.5
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `ib` double DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT f from t2 UNION select y from t2;
select * from t1;
f
1.5
1972
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f` float DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT f from t2 UNION select da from t2;
select * from t1;
f
1.5
1972-10-22
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f` varchar(12) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT y from t2 UNION select da from t2;
select * from t1;
y
1972
1972-10-22
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `y` varchar(10) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT y from t2 UNION select dt from t2;
select * from t1;
y
1972
1972-10-22 11:50:00
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `y` varchar(19) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT da from t2 UNION select dt from t2;
select * from t1;
da
1972-10-22 00:00:00
1972-10-22 11:50:00
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `da` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT dt from t2 UNION select trim(sc) from t2;
select trim(dt) from t1;
trim(dt)
1972-10-22 11:50:00
testc
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `dt` varchar(19) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT dt from t2 UNION select sv from t2;
select * from t1;
dt
1972-10-22 11:50:00
testv
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `dt` varchar(19) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT sc from t2 UNION select sv from t2;
select * from t1;
sc
testc
testv
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `sc` varchar(10) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT dt from t2 UNION select b from t2;
select * from t1;
dt
1972-10-22 11:50:00
tetetetetest
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `dt` blob
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT sv from t2 UNION select b from t2;
select * from t1;
sv
testv
tetetetetest
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `sv` blob
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT i from t2 UNION select d from t2 UNION select b from t2;
select * from t1;
i
3
2.5
tetetetetest
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `i` blob
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT sv from t2 UNION select tx from t2;
select * from t1;
sv
testv
teeeeeeeeeeeest
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `sv` text
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 SELECT b from t2 UNION select tx from t2;
select * from t1;
b
tetetetetest
teeeeeeeeeeeest
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `b` blob
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1,t2;
create table t1 select 1 union select -1;
select * from t1;
1
1
-1
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `1` bigint(20) NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 select _latin1"test" union select _latin2"testt" ;
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation 'UNION'
create table t1 select _latin2"test" union select _latin2"testt" ;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `test` varchar(5) CHARACTER SET latin2 NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (s char(200));
insert into t1 values (repeat("1",200));
create table t2 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
set local tmp_table_size=1024;
select count(*) from (select * from t1 union all select * from t2 order by 1) b;
count(*)
21
select count(*) from t1;
count(*)
8
select count(*) from t2;
count(*)
13
drop table t1,t2;
set local tmp_table_size=default;
create table t1 (a int, index (a), b int);
insert t1 values (1,1),(2,2),(3,3),(4,4),(5,5);
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
FLUSH STATUS;
show status like 'Slow_queries';
Variable_name	Value
Slow_queries	0
select count(*) from t1 where a=7;
count(*)
26
show status like 'Slow_queries';
Variable_name	Value
Slow_queries	0
select count(*) from t1 where b=13;
count(*)
10
show status like 'Slow_queries';
Variable_name	Value
Slow_queries	1
select count(*) from t1 where b=13 union select count(*) from t1 where a=7;
count(*)
10
26
show status like 'Slow_queries';
Variable_name	Value
Slow_queries	2
select count(*) from t1 where a=7 union select count(*) from t1 where b=13;
count(*)
26
10
show status like 'Slow_queries';
Variable_name	Value
Slow_queries	3
flush status;
select a from t1 where b not in (1,2,3) union select a from t1 where b not in (4,5,6);
a
4
5
3
6
7
8
9
10
1
2
show status like 'Slow_queries';
Variable_name	Value
Slow_queries	1
drop table t1;
create table t1 (   RID int(11) not null default '0',   IID int(11) not null default '0',    nada varchar(50)  not null,NAME varchar(50) not null,PHONE varchar(50) not null) engine=MyISAM;
insert into t1 ( RID,IID,nada,NAME,PHONE) values (1, 1, 'main', 'a', '111'), (2, 1, 'main', 'b', '222'), (3, 1, 'main', 'c', '333'), (4, 1, 'main', 'd', '444'), (5, 1, 'main', 'e', '555'), (6, 2, 'main', 'c', '333'), (7, 2, 'main', 'd', '454'), (8, 2, 'main', 'e', '555'), (9, 2, 'main', 'f', '666'), (10, 2, 'main', 'g', '777');
select A.NAME, A.PHONE, B.NAME, B.PHONE from t1 A left join t1 B on A.NAME = B.NAME and B.IID = 2 where A.IID = 1 and (A.PHONE <> B.PHONE or B.NAME is null) union select A.NAME, A.PHONE, B.NAME, B.PHONE from t1 B left join t1 A on B.NAME = A.NAME and A.IID = 1 where B.IID = 2 and (A.PHONE <> B.PHONE or A.NAME is null);
NAME	PHONE	NAME	PHONE
a	111	NULL	NULL
b	222	NULL	NULL
d	444	d	454
NULL	NULL	f	666
NULL	NULL	g	777
drop  table t1;
create table t1 (col1 tinyint unsigned, col2 tinyint unsigned);
insert into t1 values (1,2),(3,4),(5,6),(7,8),(9,10);
select col1 n from t1 union select col2 n from t1 order by n;
n
1
2
3
4
5
6
7
8
9
10
alter table t1 add index myindex (col2);
select col1 n from t1 union select col2 n from t1 order by n;
n
1
2
3
4
5
6
7
8
9
10
drop  table t1;
create table t1 (i int);
insert into t1 values (1);
select * from t1 UNION select * from t1;
i
1
select * from t1 UNION ALL select * from t1;
i
1
1
select * from t1 UNION select * from t1 UNION ALL select * from t1;
i
1
1
drop table t1;
select 1 as a union all select 1 union all select 2 union select 1 union all select 2;
a
1
2
2
set sql_select_limit=1;
select 1 union select 2;
1
1
(select 1) union (select 2);
1
1
(select 1) union (select 2) union (select 3) limit 2;
1
1
2
set sql_select_limit=default;
create table t1 (a int);
insert into t1 values (100), (1);
create table t2 (a int);
insert into t2 values (100);
select a from t1 union select a from t2 order by a;
a
1
100
SET SQL_SELECT_LIMIT=1;
select a from t1 union select a from t2 order by a;
a
1
drop table t1, t2;
set sql_select_limit=default;
CREATE TABLE t1 (i int(11) default NULL,c char(1) default NULL,KEY i (i));
CREATE TABLE t2 (i int(11) default NULL,c char(1) default NULL,KEY i (i));
explain (select * from t1) union (select * from t2) order by not_existing_column;
ERROR 42S22: Unknown column 'not_existing_column' in 'order clause'
drop table t1, t2;
CREATE TABLE t1 (uid int(1));
INSERT INTO t1 SELECT 150;
SELECT 'a' UNION SELECT uid FROM t1;
a
a
150
drop table t1;
CREATE TABLE t1 ( ID1 int(10) unsigned NOT NULL DEFAULT '0' , ID2 datetime NOT NULL DEFAULT '0000-00-00 00:00:00' , DATA1 varchar(10) , DATA2 double(5,4) , DATA3 datetime , PRIMARY KEY (ID1,ID2));
CREATE TABLE t2 ( ID int(3) unsigned NOT NULL DEFAULT '0' , DATA1 timestamp DEFAULT '0000-00-00 00:00:00' , PRIMARY KEY (ID));
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1);
ID1	ID2	DATA1	DATA2	DATA3	ID	DATA1
drop table t1,t2;
create table t1 (a ENUM('Yes', 'No') NOT NULL);
create table t2 (a ENUM('aaa', 'bbb') NOT NULL);
insert into t1 values ('No');
insert into t2 values ('bbb');
create table t3 (a SET('Yes', 'No') NOT NULL);
create table t4 (a SET('aaa', 'bbb') NOT NULL);
insert into t3 values (1);
insert into t4 values (3);
select "1" as a union select a from t1;
a
1
No
select a as a from t1 union select "1";
a
No
1
select a as a from t2 union select a from t1;
a
bbb
No
select "1" as a union select a from t3;
a
1
Yes
select a as a from t3 union select "1";
a
Yes
1
select a as a from t4 union select a from t3;
a
aaa,bbb
Yes
select a as a from t1 union select a from t4;
a
No
aaa,bbb
drop table t1,t2,t3,t4;
create table t1 as
(select _latin1'test') union
(select _latin1'TEST') union
(select _latin1'TeST');
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `test` varchar(4) NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select count(*) from t1;
count(*)
1
drop table t1;
create table t1 as
(select _latin1'test' collate latin1_bin) union
(select _latin1'TEST') union
(select _latin1'TeST');
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `_latin1'test' collate latin1_bin` varchar(4) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select count(*) from t1;
count(*)
3
drop table t1;
create table t1 as
(select _latin1'test') union
(select _latin1'TEST' collate latin1_bin) union
(select _latin1'TeST');
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `test` varchar(4) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select count(*) from t1;
count(*)
3
drop table t1;
create table t1 as
(select _latin1'test') union
(select _latin1'TEST') union
(select _latin1'TeST' collate latin1_bin);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `test` varchar(4) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select count(*) from t1;
count(*)
3
drop table t1;
create table t2 (
a char character set latin1 collate latin1_swedish_ci,
b char character set latin1 collate latin1_german1_ci);
create table t1 as
(select a from t2) union
(select b from t2);
ERROR HY000: Illegal mix of collations for operation 'UNION'
create table t1 as
(select a collate latin1_german1_ci from t2) union
(select b from t2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a collate latin1_german1_ci` varchar(1) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 as
(select a from t2) union
(select b collate latin1_german1_ci from t2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` varchar(1) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 as
(select a from t2) union
(select b from t2) union
(select 'c' collate latin1_german1_ci from t2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` varchar(1) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
drop table t2;
create table t1(a1 int, f1 char(10));
create table t2
select f2,a1 from (select a1, CAST('2004-12-31' AS DATE) f2 from t1) a
union
select f2,a1 from (select a1, CAST('2004-12-31' AS DATE) f2 from t1) a
order by f2, a1;
show columns from t2;
Field	Type	Null	Key	Default	Extra
f2	date	YES		NULL	
a1	int(11)	YES		NULL	
drop table t1, t2;
create table t1 (f1 int);
create table t2 (f1 int, f2 int ,f3 date);
create table t3 (f1 int, f2 char(10));
create table t4
(
select t2.f3 as sdate
from t1
left outer join t2 on (t1.f1 = t2.f1)
inner join t3 on (t2.f2 = t3.f1)
order by t1.f1, t3.f1, t2.f3
)
union
(
select cast('2004-12-31' as date) as sdate
from t1
left outer join t2 on (t1.f1 = t2.f1)
inner join t3 on (t2.f2 = t3.f1)
group by t1.f1
order by t1.f1, t3.f1, t2.f3
)
order by sdate;
show columns from t4;
Field	Type	Null	Key	Default	Extra
sdate	date	YES		NULL	
drop table t1, t2, t3, t4;
create table t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
select * from ((select * from t1 limit 1)) a;
a	b
1	a
select * from ((select * from t1 limit 1) union (select * from t1 limit 1)) a;
a	b
1	a
2	b
select * from ((select * from t1 limit 1) union (select * from t1 limit 1) union (select * from t1 limit 1)) a;
a	b
1	a
2	b
3	c
select * from ((((select * from t1))) union (select * from t1) union (select * from t1)) a;
a	b
1	a
2	b
3	c
select * from ((select * from t1) union (((select * from t1))) union (select * from t1)) a;
a	b
1	a
2	b
3	c
drop table t1;
set @val:=6;
select concat('value is: ', @val) union select 'some text';
concat('value is: ', @val)
value is: 6
some text
select concat(_latin1'a', _ascii'b' collate ascii_bin);
concat(_latin1'a', _ascii'b' collate ascii_bin)
ab
create table t1 (foo varchar(100)) collate ascii_bin;
insert into t1 (foo) values ("foo");
select foo from t1 union select 'bar' as foo from dual;
foo
foo
bar
drop table t1;
CREATE TABLE t1 (
a ENUM('ä','ö','ü') character set utf8 not null default 'ü',
b ENUM("one", "two") character set utf8,
c ENUM("one", "two")
);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` enum('ä','ö','ü') CHARACTER SET utf8 NOT NULL DEFAULT 'ü',
  `b` enum('one','two') CHARACTER SET utf8 DEFAULT NULL,
  `c` enum('one','two') DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
insert into t1 values ('ä', 'one', 'one'), ('ö', 'two', 'one'), ('ü', NULL, NULL);
create table t2 select NULL union select a from t1;
show columns from t2;
Field	Type	Null	Key	Default	Extra
NULL	enum('ä','ö','ü')	YES		NULL	
drop table t2;
create table t2 select a from t1 union select NULL;
show columns from t2;
Field	Type	Null	Key	Default	Extra
a	enum('ä','ö','ü')	YES		NULL	
drop table t2;
create table t2 select a from t1 union select a from t1;
show columns from t2;
Field	Type	Null	Key	Default	Extra
a	varchar(1)	NO			
drop table t2;
create table t2 select a from t1 union select c from t1;
drop table t2;
create table t2 select a from t1 union select b from t1;
show columns from t2;
Field	Type	Null	Key	Default	Extra
a	varchar(3)	YES		NULL	
drop table t2, t1;
create table t1 (f1 decimal(60,25), f2 decimal(60,25));
insert into t1 values (0.0,0.0);
select f1 from t1 union all select f2 from t1;
f1
0.0000000000000000000000000
0.0000000000000000000000000
select 'XXXXXXXXXXXXXXXXXXXX' as description, f1 from t1
union all
select 'YYYYYYYYYYYYYYYYYYYY' as description, f2 from t1;
description	f1
XXXXXXXXXXXXXXXXXXXX	0.0000000000000000000000000
YYYYYYYYYYYYYYYYYYYY	0.0000000000000000000000000
drop table t1;
create table t1 (f1 decimal(60,24), f2 decimal(60,24));
insert into t1 values (0.0,0.0);
select f1 from t1 union all select f2 from t1;
f1
0.000000000000000000000000
0.000000000000000000000000
select 'XXXXXXXXXXXXXXXXXXXX' as description, f1 from t1
union all
select 'YYYYYYYYYYYYYYYYYYYY' as description, f2 from t1;
description	f1
XXXXXXXXXXXXXXXXXXXX	0.000000000000000000000000
YYYYYYYYYYYYYYYYYYYY	0.000000000000000000000000
drop table t1;
create table t1 (a varchar(5));
create table t2 select * from t1 union select 'abcdefghijkl';
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` varchar(12) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select row_format from information_schema.TABLES where table_schema="test" and table_name="t2";
row_format
Dynamic
alter table t2 ROW_FORMAT=fixed;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` varchar(12) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 ROW_FORMAT=FIXED
drop table t1,t2;
CREATE TABLE t1 (a mediumtext);
CREATE TABLE t2 (b varchar(20));
INSERT INTO t1 VALUES ('a'),('b');
SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
left(a,100000000)
a
b
create table t3 SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
show create table t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `left(a,100000000)` mediumtext
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop tables t1,t2,t3;
CREATE TABLE t1 (a longtext);
CREATE TABLE t2 (b varchar(20));
INSERT INTO t1 VALUES ('a'),('b');
SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
left(a,100000000)
a
b
create table t3 SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
show create table t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `left(a,100000000)` longtext
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop tables t1,t2,t3;
SELECT @tmp_max:= @@global.max_allowed_packet;
@tmp_max:= @@global.max_allowed_packet
1048576
SET @@global.max_allowed_packet=25000000;
Warnings:
Warning	1292	Truncated incorrect max_allowed_packet value: '25000000'
CREATE TABLE t1 (a mediumtext);
CREATE TABLE t2 (b varchar(20));
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,20000000) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` longtext
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLES t1,t3;
CREATE TABLE t1 (a tinytext);
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,2) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` varchar(510) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLES t1,t3;
CREATE TABLE t1 (a mediumtext);
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,2) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` longtext
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLES t1,t3;
CREATE TABLE t1 (a tinyblob);
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,2) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` varbinary(510) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLES t1,t2,t3;
SET @@global.max_allowed_packet:= @tmp_max;
create table t1 ( id int not null auto_increment, primary key (id), col1 int);
insert into t1 (col1) values (2),(3),(4),(5),(6);
select 99 union all select id from t1 order by 1;
99
1
2
3
4
5
99
select id from t1 union all select 99 order by 1;
id
1
2
3
4
5
99
drop table t1;
create table t1(f1 char(1), f2 char(5), f3 binary(1), f4 binary(5), f5 timestamp, f6 varchar(1) character set utf8 collate utf8_general_ci, f7 text);
create table t2 as select *, f6 as f8 from t1 union select *, f7 from t1;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `f1` char(1) DEFAULT NULL,
  `f2` char(5) DEFAULT NULL,
  `f3` binary(1) DEFAULT NULL,
  `f4` binary(5) DEFAULT NULL,
  `f5` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `f6` varchar(1) CHARACTER SET utf8 DEFAULT NULL,
  `f7` text,
  `f8` mediumtext CHARACTER SET utf8
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1, t2;
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1));
avg(1)
1.0000
select _utf8'12' union select _latin1'12345';
12
12
12345
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (3),(1),(2),(4),(1);
SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a) AS test;
a
1
2
3
4
SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY c) AS test;
ERROR 42S22: Unknown column 'c' in 'order clause'
DROP TABLE t1;
(select 1 into @var) union (select 1);
ERROR HY000: Incorrect usage of UNION and INTO
(select 1) union (select 1 into @var);
select @var;
@var
1
(select 2) union (select 1 into @var);
ERROR 42000: Result consisted of more than one row
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (10), (20);
CREATE TABLE t2 (b int);
INSERT INTO t2 VALUES (10), (50), (50);
SELECT a,1 FROM t1 
UNION
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a;
a	1
NULL	3
10	1
20	1
50	2
SELECT a,1 FROM t1 
UNION
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a DESC;
a	1
50	2
20	1
10	1
NULL	3
SELECT a,1 FROM t1 
UNION
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a ASC LIMIT 3;
a	1
NULL	3
10	1
20	1
SELECT a,1 FROM t1 
UNION ALL 
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a DESC;
a	1
50	2
20	1
10	1
10	1
NULL	3
SELECT a,1 FROM t1
UNION 
(SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP ORDER BY a);
ERROR HY000: Incorrect usage of CUBE/ROLLUP and ORDER BY
SELECT a,1 FROM t1
UNION ALL
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP ORDER BY a
UNION
SELECT 1,1;
ERROR HY000: Incorrect usage of UNION and ORDER BY
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1), (2), (3);
CREATE TABLE t2 SELECT * FROM (SELECT NULL) a UNION SELECT a FROM t1;
DESC t2;
Field	Type	Null	Key	Default	Extra
NULL	int(11)	YES		NULL	
CREATE TABLE t3 SELECT a FROM t1 UNION SELECT * FROM (SELECT NULL) a;
DESC t3;
Field	Type	Null	Key	Default	Extra
a	int(11)	YES		NULL	
CREATE TABLE t4 SELECT NULL;
DESC t4;
Field	Type	Null	Key	Default	Extra
NULL	binary(0)	YES		NULL	
CREATE TABLE t5 SELECT NULL UNION SELECT NULL;
DESC t5;
Field	Type	Null	Key	Default	Extra
NULL	binary(0)	YES		NULL	
CREATE TABLE t6 
SELECT * FROM (SELECT * FROM (SELECT NULL)a) b UNION SELECT a FROM t1;
DESC t6;
Field	Type	Null	Key	Default	Extra
NULL	int(11)	YES		NULL	
DROP TABLE t1, t2, t3, t4, t5, t6;
CREATE TABLE t1 (f FLOAT(9,6));
CREATE TABLE t2 AS SELECT f FROM t1 UNION SELECT f FROM t1;
SHOW FIELDS FROM t2;
Field	Type	Null	Key	Default	Extra
f	float(9,6)	YES		NULL	
DROP TABLE t1, t2;
CREATE TABLE t1(d DOUBLE(9,6));
CREATE TABLE t2 AS SELECT d FROM t1 UNION SELECT d FROM t1;
SHOW FIELDS FROM t2;
Field	Type	Null	Key	Default	Extra
d	double(9,6)	YES		NULL	
DROP TABLE t1, t2;
CREATE TABLE t1(a INT);
EXPLAIN EXTENDED
SELECT a FROM t1
UNION
SELECT a FROM t1
ORDER BY a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
2	UNION	t1	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using filesort
Warnings:
Note	1003	select NULL AS `a` from `test`.`t1` union select NULL AS `a` from `test`.`t1` order by `a`
DROP TABLE t1;
End of 5.0 tests
#
# Bug#32858: Error: "Incorrect usage of UNION and INTO" does not take 
# subselects into account
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1);
# Tests fix in parser rule select_derived_union.
SELECT a INTO @v FROM (
SELECT a FROM t1
UNION
SELECT a FROM t1
) alias;
SELECT a INTO OUTFILE 'union.out.file' FROM (
SELECT a FROM t1
UNION
SELECT a FROM t1 WHERE 0
) alias;
SELECT a INTO DUMPFILE 'union.out.file2' FROM (
SELECT a FROM t1
UNION
SELECT a FROM t1 WHERE 0
) alias;
SELECT a FROM t1 UNION SELECT a INTO @v FROM t1;
SELECT a FROM t1 UNION SELECT a INTO OUTFILE 'union.out.file5' FROM t1;
SELECT a FROM t1 UNION SELECT a INTO OUTFILE 'union.out.file6' FROM t1;
SELECT a INTO @v FROM t1 UNION SELECT a FROM t1;
ERROR HY000: Incorrect usage of UNION and INTO
SELECT a INTO OUTFILE 'union.out.file7' FROM t1 UNION SELECT a FROM t1;
ERROR HY000: Incorrect usage of UNION and INTO
SELECT a INTO DUMPFILE 'union.out.file8' FROM t1 UNION SELECT a FROM t1;
ERROR HY000: Incorrect usage of UNION and INTO
# Tests fix in parser rule query_expression_body.
SELECT ( SELECT a UNION SELECT a ) INTO @v FROM t1;
SELECT ( SELECT a UNION SELECT a ) INTO OUTFILE  'union.out.file3' FROM t1;
SELECT ( SELECT a UNION SELECT a ) INTO DUMPFILE 'union.out.file4' FROM t1;
DROP TABLE t1;
# 
# Bug #49734: Crash on EXPLAIN EXTENDED UNION ... ORDER BY 
#   <any non-const-function>
# 
CREATE TABLE t1 (a VARCHAR(10), FULLTEXT KEY a (a));
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (1),(2);
# Should not crash
EXPLAIN EXTENDED
SELECT * FROM t1 UNION SELECT * FROM t1 ORDER BY a + 12;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	UNION	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using filesort
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` union select `test`.`t1`.`a` AS `a` from `test`.`t1` order by (`a` + 12)
# Should not crash
SELECT * FROM t1 UNION SELECT * FROM t1 ORDER BY a + 12;
a
1
2
# Should not crash
EXPLAIN EXTENDED
SELECT * FROM t1 UNION SELECT * FROM t1
ORDER BY MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE);
ERROR 42000: Incorrect usage/placement of 'MATCH()'
# Should not crash
SELECT * FROM t1 UNION SELECT * FROM t1
ORDER BY MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE);
ERROR 42000: Incorrect usage/placement of 'MATCH()'
# Should not crash
(SELECT * FROM t1) UNION (SELECT * FROM t1)
ORDER BY MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE);
a
1
2
# Should not crash
EXPLAIN EXTENDED
SELECT * FROM t1 UNION SELECT * FROM t1
ORDER BY (SELECT a FROM t2 WHERE b = 12);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
2	UNION	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	Using filesort
3	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
Warnings:
Note	1276	Field or reference 'a' of SELECT #3 was resolved in SELECT #-1
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` union select `test`.`t1`.`a` AS `a` from `test`.`t1` order by (select `a` from `test`.`t2` where (`test`.`t2`.`b` = 12))
# Should not crash
SELECT * FROM t1 UNION SELECT * FROM t1
ORDER BY (SELECT a FROM t2 WHERE b = 12);
# Should not crash
SELECT * FROM t2 UNION SELECT * FROM t2
ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));
b
1
2
DROP TABLE t1,t2;
create table t1 (a int);
insert into t1 values (10),(10),(10),(2),(3),(4),(5),(6),(7),(8),(9),(1),(10);
select a from t1 where false UNION select a from t1 limit 8;
a
10
2
3
4
5
6
7
8
drop table t1;
#
# Bug#11765255 58201:
# VALGRIND/CRASH WHEN ORDERING BY MULTIPLE AGGREGATE FUNCTIONS
#
select 1 as foo
union
select 2
union
select 3
union
select 4
order by max(42) + max(1) + max(1) + max(1) + max(1) + max(1)
;
foo
1
prepare stmt1 from 'select 1 as foo
union
select 2
union
select 3
union
select 4
order by max(42) + max(1) + max(1) + max(1) + max(1) + max(1)
';
execute stmt1;
foo
1
execute stmt1;
foo
1
select 1 as foo
union
select 2
union
select 3
union
(select 4)
order by max(42) + max(1) + max(1) + max(1) + max(1) + max(1)
;
foo
1
prepare stmt1 from 'select 1 as foo
union
select 2
union
select 3
union
(select 4)
order by max(42) + max(1) + max(1) + max(1) + max(1) + max(1)
';
execute stmt1;
foo
1
execute stmt1;
foo
1
deallocate prepare stmt1;
End of 5.1 tests
#
# Bug#57986 ORDER BY clause is not used after a UNION, 
#           if embedded in a SELECT
#
CREATE TABLE t1 (c1 VARCHAR(10) NOT NULL, c2 INT NOT NULL);
CREATE TABLE t2 (c1 VARCHAR(10) NOT NULL, c2 INT NOT NULL);
INSERT INTO t1 (c1, c2) VALUES ('t1a', 1), ('t1a', 2), ('t1a', 3), ('t1b', 2), ('t1b', 1);
INSERT INTO t2 (c1, c2) VALUES ('t2a', 1), ('t2a', 2), ('t2a', 3), ('t2b', 2), ('t2b', 1);
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY c2, c1;
c1	c2
t1a	1
t1b	1
t2a	1
t2b	1
t1a	2
t1b	2
t2a	2
t2b	2
t1a	3
t2a	3
SELECT * FROM t1 UNION (SELECT * FROM t2) ORDER BY c2, c1;
c1	c2
t1a	1
t1b	1
t2a	1
t2b	1
t1a	2
t1b	2
t2a	2
t2b	2
t1a	3
t2a	3
SELECT * FROM t1 UNION (SELECT * FROM t2 ORDER BY c2, c1);
c1	c2
t1a	1
t1a	2
t1a	3
t1b	2
t1b	1
t2a	1
t2a	2
t2a	3
t2b	2
t2b	1
SELECT c1, c2 FROM (
SELECT c1, c2 FROM t1
UNION
(SELECT c1, c2 FROM t2)
ORDER BY c2, c1
) AS res;
c1	c2
t1a	1
t1b	1
t2a	1
t2b	1
t1a	2
t1b	2
t2a	2
t2b	2
t1a	3
t2a	3
SELECT c1, c2 FROM (
SELECT c1, c2 FROM t1
UNION
(SELECT c1, c2 FROM t2)
ORDER BY c2 DESC, c1 LIMIT 1
) AS res;
c1	c2
t1a	3
SELECT c1, c2 FROM (
SELECT c1, c2 FROM t1
UNION
(SELECT c1, c2 FROM t2 ORDER BY c2 DESC, c1 LIMIT 1)
) AS res;
c1	c2
t1a	1
t1a	2
t1a	3
t1b	2
t1b	1
t2a	3
SELECT c1, c2 FROM (
SELECT c1, c2 FROM t1
UNION
SELECT c1, c2 FROM t2 
ORDER BY c2 DESC, c1 DESC LIMIT 1
) AS res;
c1	c2
t2a	3
SELECT c1, c2 FROM (
(
(SELECT c1, c2 FROM t1)
UNION
(SELECT c1, c2 FROM t2)
)
ORDER BY c2 DESC, c1 ASC LIMIT 1
) AS res;
c1	c2
t1a	3
DROP TABLE t1, t2;
#
# Bug #58970 Problem Subquery (without referencing a table) 
#            and Order By
#
SELECT(SELECT 0 AS a UNION SELECT 1 AS a ORDER BY a ASC  LIMIT 1) AS dev;
dev
0
SELECT(SELECT 0 AS a UNION SELECT 1 AS a ORDER BY a DESC LIMIT 1) AS dev;
dev
1
SELECT(SELECT 0 AS a FROM dual UNION SELECT 1 AS a FROM dual ORDER BY a ASC  LIMIT 1) AS dev;
dev
0
SELECT(SELECT 0 AS a FROM dual UNION SELECT 1 AS a FROM dual ORDER BY a DESC LIMIT 1) AS dev;
dev
1
SELECT(SELECT 1 AS a ORDER BY a) AS dev;
dev
1
SELECT(SELECT 1 AS a LIMIT 1) AS dev;
dev
1
SELECT(SELECT 1 AS a FROM dual ORDER BY a DESC LIMIT 1) AS dev;
dev
1