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
|
# 2016 June 17
#
# 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus is on testing that cursor-hints are correct for queries
# involving LEFT JOIN.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix cursorhint2
ifcapable !cursorhints {
finish_test
return
}
proc extract_hints {sql} {
db eval "SELECT tbl_name, rootpage FROM sqlite_master where rootpage" {
set lookup($rootpage) $tbl_name
}
set ret [list]
db eval "EXPLAIN $sql" a {
switch -- $a(opcode) {
OpenRead {
set csr($a(p1)) $lookup($a(p2))
}
CursorHint {
lappend ret $csr($a(p1)) $a(p4)
}
}
}
set ret
}
proc do_extract_hints_test {tn sql ret} {
uplevel [list do_test $tn [list extract_hints $sql] [list {*}$ret]]
}
do_execsql_test 1.0 {
PRAGMA automatic_index = 0;
CREATE TABLE t1(a, b);
CREATE TABLE t2(c, d);
CREATE TABLE t3(e, f);
}
do_extract_hints_test 1.1 {
SELECT * FROM t1 WHERE a=1;
} {
t1 EQ(c0,1)
}
do_extract_hints_test 1.2 {
SELECT * FROM t1 CROSS JOIN t2 ON (a=c) WHERE d IS NULL;
} {
t2 {AND(ISNULL(c1),EQ(r[1],c0))}
}
do_extract_hints_test 1.3 {
SELECT * FROM t1 LEFT JOIN t2 ON (a=c) WHERE d IS NULL;
} {
t2 {EQ(r[2],c0)}
}
do_extract_hints_test 1.4 {
SELECT * FROM t1 LEFT JOIN t2 ON (a=c AND a=10) WHERE d IS NULL;
} {
t2 {AND(EQ(r[2],c0),EQ(r[3],10))}
}
do_extract_hints_test 1.5 {
SELECT * FROM t1 CROSS JOIN t2 ON (a=c AND a=10) WHERE d IS NULL;
} {
t1 EQ(c0,10) t2 {AND(ISNULL(c1),EQ(r[3],c0))}
}
do_extract_hints_test 1.6 {
SELECT * FROM t1 LEFT JOIN t2 ON (a=c) LEFT JOIN t3 ON (d=f);
} {
t2 {EQ(r[2],c0)} t3 {EQ(r[6],c1)}
}
if 0 {
do_extract_hints_test 1.7 {
SELECT * FROM t1 LEFT JOIN t2 ON (a=c AND d=e) LEFT JOIN t3 ON (d=f);
} {
t2 {EQ(r[2],c0)} t3 {AND(EQ(r[6],c0),EQ(r[7],c1))}
}
}
#-------------------------------------------------------------------------
#
do_execsql_test 2.0 {
CREATE TABLE x1(x, y);
CREATE TABLE x2(a, b);
}
do_extract_hints_test 2.1 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE b IS NULL;
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.2 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE b IS +NULL;
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.3 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 1 = (b IS NULL)
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.4 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 1 = coalesce(b, 1)
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.5 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 1 = coalesce(b, 1)
} {
x2 {EQ(c0,r[2])}
}
if {0} {
# These tests no longer work due to the LEFT-JOIN strength reduction
# optimization
do_extract_hints_test 2.6 {
SELECT * FROM x1 CROSS JOIN x2 ON (a=x) WHERE 0 = (b IS NOT NULL)
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.7 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 0 = (b IS NOT +NULL)
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.8 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE b IS NOT +NULL
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.9 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x)
WHERE CASE b WHEN 0 THEN 0 ELSE 1 END;
} {
x2 {EQ(c0,r[2])}
}
do_extract_hints_test 2.10 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE x2.b = 32+32
} {
x2 {AND(EQ(c1,ADD(32,32)),EQ(c0,r[2]))}
}
ifcapable !icu {
# This test only works using the built-in LIKE, not the ICU LIKE extension.
do_extract_hints_test 2.11 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE x2.b LIKE 'abc%'
} {
x2 {AND(expr,EQ(c0,r[2]))}
}
}
}
do_extract_hints_test 2.12 {
SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE coalesce(x2.b, 1)
} {
x2 {EQ(c0,r[2])}
}
reset_db
do_execsql_test 3.0 {
CREATE TABLE t1 (i1 TEXT);
CREATE TABLE t2 (i2 TEXT UNIQUE);
INSERT INTO t1 VALUES('0');
INSERT INTO t2 VALUES('0');
}
do_extract_hints_test 3.1 {
SELECT * FROM t1 CROSS JOIN t2 WHERE (t1.i1 = t2.i2) AND t2.i2 = 1;
} {
t1 {EQ(c0,r[1])} t2 EQ(c0,1)
}
finish_test
|
