xref: /sqlite-3.40.0/test/select2.test (revision ef5ecb41) 
1# 2001 September 15
2#
3# The author disclaims copyright to this source code.  In place of
4# a legal notice, here is a blessing:
5#
6#    May you do good and not evil.
7#    May you find forgiveness for yourself and forgive others.
8#    May you share freely, never taking more than you give.
9#
10#***********************************************************************
11# This file implements regression tests for SQLite library.  The
12# focus of this file is testing the SELECT statement.
13#
14# $Id: select2.test,v 1.22 2004/05/28 11:37:29 danielk1977 Exp $
15
16set testdir [file dirname $argv0]
17source $testdir/tester.tcl
18
19# Create a table with some data
20#
21execsql {CREATE TABLE tbl1(f1 int, f2 int)}
22execsql {BEGIN}
23for {set i 0} {$i<=30} {incr i} {
24  execsql "INSERT INTO tbl1 VALUES([expr {$i%9}],[expr {$i%10}])"
25}
26execsql {COMMIT}
27
28# Do a second query inside a first.
29#
30do_test select2-1.1 {
31  set sql {SELECT DISTINCT f1 FROM tbl1 ORDER BY f1}
32  set r {}
33  catch {unset data}
34  db eval $sql data {
35    set f1 $data(f1)
36    lappend r $f1:
37    set sql2 "SELECT f2 FROM tbl1 WHERE f1=$f1 ORDER BY f2"
38    db eval $sql2 d2 {
39      lappend r $d2(f2)
40    }
41  }
42  set r
43} {0: 0 7 8 9 1: 0 1 8 9 2: 0 1 2 9 3: 0 1 2 3 4: 2 3 4 5: 3 4 5 6: 4 5 6 7: 5 6 7 8: 6 7 8}
44
45do_test select2-1.2 {
46  set sql {SELECT DISTINCT f1 FROM tbl1 WHERE f1>3 AND f1<5}
47  set r {}
48  db eval $sql data {
49    set f1 $data(f1)
50    lappend r $f1:
51    set sql2 "SELECT f2 FROM tbl1 WHERE f1=$f1 ORDER BY f2"
52    db eval $sql2 d2 {
53      lappend r $d2(f2)
54    }
55  }
56  set r
57} {4: 2 3 4}
58
59# Create a largish table
60#
61do_test select2-2.0 {
62  execsql {CREATE TABLE tbl2(f1 int, f2 int, f3 int); BEGIN;}
63  for {set i 1} {$i<=30000} {incr i} {
64    execsql "INSERT INTO tbl2 VALUES($i,[expr {$i*2}],[expr {$i*3}])"
65  }
66  execsql {COMMIT}
67} {}
68
69do_test select2-2.1 {
70  execsql {SELECT count(*) FROM tbl2}
71} {30000}
72do_test select2-2.2 {
73  execsql {SELECT count(*) FROM tbl2 WHERE f2>1000}
74} {29500}
75
76do_test select2-3.1 {
77  execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}
78} {500}
79
80do_test select2-3.2a {
81  execsql {CREATE INDEX idx1 ON tbl2(f2)}
82} {}
83do_test select2-3.2b {
84  execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}
85} {500}
86do_test select2-3.2c {
87  execsql {SELECT f1 FROM tbl2 WHERE f2=1000}
88} {500}
89do_test select2-3.2d {
90  set sqlite_search_count 0
91  execsql {SELECT * FROM tbl2 WHERE 1000=f2}
92  set sqlite_search_count
93} {3}
94do_test select2-3.2e {
95  set sqlite_search_count 0
96  execsql {SELECT * FROM tbl2 WHERE f2=1000}
97  set sqlite_search_count
98} {3}
99
100# Make sure queries run faster with an index than without
101#
102do_test select2-3.3 {
103  execsql {DROP INDEX idx1}
104  set sqlite_search_count 0
105  execsql {SELECT f1 FROM tbl2 WHERE f2==2000}
106  set sqlite_search_count
107} {29999}
108
109# Make sure we can optimize functions in the WHERE clause that
110# use fields from two or more different table.  (Bug #6)
111#
112do_test select2-4.1 {
113  execsql {
114    CREATE TABLE aa(a);
115    CREATE TABLE bb(b);
116    INSERT INTO aa VALUES(1);
117    INSERT INTO aa VALUES(3);
118    INSERT INTO bb VALUES(2);
119    INSERT INTO bb VALUES(4);
120    SELECT * FROM aa, bb WHERE max(a,b)>2;
121  }
122} {1 4 3 2 3 4}
123do_test select2-4.2 {
124  execsql {
125    INSERT INTO bb VALUES(0);
126    SELECT * FROM aa, bb WHERE b;
127  }
128} {1 2 1 4 3 2 3 4}
129do_test select2-4.3 {
130  execsql {
131    SELECT * FROM aa, bb WHERE NOT b;
132  }
133} {1 0 3 0}
134do_test select2-4.4 {
135  execsql {
136    SELECT * FROM aa, bb WHERE min(a,b);
137  }
138} {1 2 1 4 3 2 3 4}
139do_test select2-4.5 {
140  execsql {
141    SELECT * FROM aa, bb WHERE NOT min(a,b);
142  }
143} {1 0 3 0}
144do_test select2-4.6 {
145  execsql {
146    SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 1 END;
147  }
148} {1 2 3 4}
149do_test select2-4.7 {
150  execsql {
151    SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 0 ELSE 1 END;
152  }
153} {1 4 1 0 3 2 3 0}
154
155finish_test
156