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
|
# 2012 September 18
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix in5
do_test in5-1.1 {
execsql {
CREATE TABLE t1x(x INTEGER PRIMARY KEY);
INSERT INTO t1x VALUES(1),(3),(5),(7),(9);
CREATE TABLE t1y(y INTEGER UNIQUE);
INSERT INTO t1y VALUES(2),(4),(6),(8);
CREATE TABLE t1z(z TEXT UNIQUE);
INSERT INTO t1z VALUES('a'),('c'),('e'),('g');
CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT, d TEXT);
INSERT INTO t2 VALUES(1,2,'a','12a'),(1,2,'b','12b'),
(2,3,'g','23g'),(3,5,'c','35c'),
(4,6,'h','46h'),(5,6,'e','56e');
CREATE TABLE t3x AS SELECT x FROM t1x;
CREATE TABLE t3y AS SELECT y FROM t1y;
CREATE TABLE t3z AS SELECT z FROM t1z;
SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z ORDER BY c;
}
} {12a 56e}
do_test in5-1.2 {
execsql {
SELECT d FROM t2 WHERE a IN t1y AND b IN t1x AND c IN t1z ORDER BY d;
}
} {23g}
do_test in5-1.3 {
execsql {
SELECT d FROM t2 WHERE a IN t3x AND b IN t3y AND c IN t3z ORDER BY d;
}
} {12a 56e}
do_test in5-2.1 {
execsql {
CREATE INDEX t2abc ON t2(a,b,c);
SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z ORDER BY d;
}
} {12a 56e}
do_test in5-2.2 {
execsql {
SELECT d FROM t2 WHERE a IN t1y AND b IN t1x AND c IN t1z ORDER BY d;
}
} {23g}
do_test in5-2.3 {
regexp {OpenEphemeral} [db eval {
EXPLAIN SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z
}]
} {0}
do_test in5-2.4 {
execsql {
SELECT d FROM t2 WHERE a IN t3x AND b IN t3y AND c IN t3z ORDER BY d;
}
} {12a 56e}
do_test in5-2.5.1 {
regexp {OpenEphemeral} [db eval {
EXPLAIN SELECT d FROM t2 WHERE a IN t3x AND b IN t1y AND c IN t1z
}]
} {1}
do_test in5-2.5.2 {
regexp {OpenEphemeral} [db eval {
EXPLAIN SELECT d FROM t2 WHERE a IN t1x AND b IN t3y AND c IN t1z
}]
} {1}
do_test in5-2.5.3 {
regexp {OpenEphemeral} [db eval {
EXPLAIN SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t3z
}]
} {1}
do_test in5-3.1 {
execsql {
DROP INDEX t2abc;
CREATE INDEX t2ab ON t2(a,b);
SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z ORDER BY d;
}
} {12a 56e}
do_test in5-3.2 {
execsql {
SELECT d FROM t2 WHERE a IN t1y AND b IN t1x AND c IN t1z ORDER BY d;
}
} {23g}
do_test in5-3.3 {
regexp {OpenEphemeral} [db eval {
EXPLAIN SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z
}]
} {0}
do_test in5-4.1 {
execsql {
DROP INDEX t2ab;
CREATE INDEX t2abcd ON t2(a,b,c,d);
SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z ORDER BY d;
}
} {12a 56e}
do_test in5-4.2 {
execsql {
SELECT d FROM t2 WHERE a IN t1y AND b IN t1x AND c IN t1z ORDER BY d;
}
} {23g}
do_test in5-4.3 {
regexp {OpenEphemeral} [db eval {
EXPLAIN SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z
}]
} {0}
do_test in5-5.1 {
execsql {
DROP INDEX t2abcd;
CREATE INDEX t2cbad ON t2(c,b,a,d);
SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z ORDER BY d;
}
} {12a 56e}
do_test in5-5.2 {
execsql {
SELECT d FROM t2 WHERE a IN t1y AND b IN t1x AND c IN t1z ORDER BY d;
}
} {23g}
do_test in5-5.3 {
regexp {OpenEphemeral} [db eval {
EXPLAIN SELECT d FROM t2 WHERE a IN t1x AND b IN t1y AND c IN t1z
}]
} {0}
#-------------------------------------------------------------------------
# At one point SQLite was removing the DISTINCT keyword from expressions
# similar to:
#
# <expr1> IN (SELECT DISTINCT <expr2> FROM...)
#
# However, there are a few obscure cases where this is incorrect. For
# example, if the SELECT features a LIMIT clause, or if the collation
# sequence or affinity used by the DISTINCT does not match the one used
# by the IN(...) expression.
#
do_execsql_test 6.1.1 {
CREATE TABLE t1(a COLLATE nocase);
INSERT INTO t1 VALUES('one');
INSERT INTO t1 VALUES('ONE');
}
do_execsql_test 6.1.2 {
SELECT count(*) FROM t1 WHERE a COLLATE BINARY IN (SELECT DISTINCT a FROM t1)
} {1}
do_execsql_test 6.2.1 {
CREATE TABLE t3(a, b);
INSERT INTO t3 VALUES(1, 1);
INSERT INTO t3 VALUES(1, 2);
INSERT INTO t3 VALUES(1, 3);
INSERT INTO t3 VALUES(2, 4);
INSERT INTO t3 VALUES(2, 5);
INSERT INTO t3 VALUES(2, 6);
INSERT INTO t3 VALUES(3, 7);
INSERT INTO t3 VALUES(3, 8);
INSERT INTO t3 VALUES(3, 9);
}
do_execsql_test 6.2.2 {
SELECT count(*) FROM t3 WHERE b IN (SELECT DISTINCT a FROM t3 LIMIT 5);
} {3}
do_execsql_test 6.2.3 {
SELECT count(*) FROM t3 WHERE b IN (SELECT a FROM t3 LIMIT 5);
} {2}
do_execsql_test 6.3.1 {
CREATE TABLE x1(a);
CREATE TABLE x2(b);
INSERT INTO x1 VALUES(1), (1), (2);
INSERT INTO x2 VALUES(1), (2);
SELECT count(*) FROM x2 WHERE b IN (SELECT DISTINCT a FROM x1 LIMIT 2);
} {2}
finish_test
|
