xref: /sqlite-3.40.0/test/select2.test (revision 74217cc0) 
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 1.25 2005/07/21 03:15:01 drh 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 $d2(f2)
54    }
55  }
56  set r
57} {4: 2 3 4}
58
59# Create a largish table. Do this twice, once using the TCL cache and once
60# without.  Compare the performance to make sure things go faster with the
61# cache turned on.
62#
63ifcapable tclvar {
64  do_test select2-2.0.1 {
65    set t1 [time {
66      execsql {CREATE TABLE tbl2(f1 int, f2 int, f3 int); BEGIN;}
67      for {set i 1} {$i<=30000} {incr i} {
68        set i2 [expr {$i*2}]
69        set i3 [expr {$i*3}]
70        db eval {INSERT INTO tbl2 VALUES($i,$i2,$i3)}
71      }
72      execsql {COMMIT}
73    }]
74    list
75  } {}
76  puts "time with cache: $::t1"
77}
78catch {execsql {DROP TABLE tbl2}}
79do_test select2-2.0.2 {
80  set t2 [time {
81    execsql {CREATE TABLE tbl2(f1 int, f2 int, f3 int); BEGIN;}
82    for {set i 1} {$i<=30000} {incr i} {
83      set i2 [expr {$i*2}]
84      set i3 [expr {$i*3}]
85      execsql "INSERT INTO tbl2 VALUES($i,$i2,$i3)"
86    }
87    execsql {COMMIT}
88  }]
89  list
90} {}
91puts "time without cache: $t2"
92ifcapable tclvar {
93  do_test select2-2.0.3 {
94    expr {[lindex $t1 0]<[lindex $t2 0]}
95  } 1
96}
97
98do_test select2-2.1 {
99  execsql {SELECT count(*) FROM tbl2}
100} {30000}
101do_test select2-2.2 {
102  execsql {SELECT count(*) FROM tbl2 WHERE f2>1000}
103} {29500}
104
105do_test select2-3.1 {
106  execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}
107} {500}
108
109do_test select2-3.2a {
110  execsql {CREATE INDEX idx1 ON tbl2(f2)}
111} {}
112do_test select2-3.2b {
113  execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}
114} {500}
115do_test select2-3.2c {
116  execsql {SELECT f1 FROM tbl2 WHERE f2=1000}
117} {500}
118do_test select2-3.2d {
119  set sqlite_search_count 0
120btree_breakpoint
121  execsql {SELECT * FROM tbl2 WHERE 1000=f2}
122  set sqlite_search_count
123} {3}
124do_test select2-3.2e {
125  set sqlite_search_count 0
126  execsql {SELECT * FROM tbl2 WHERE f2=1000}
127  set sqlite_search_count
128} {3}
129
130# Make sure queries run faster with an index than without
131#
132do_test select2-3.3 {
133  execsql {DROP INDEX idx1}
134  set sqlite_search_count 0
135  execsql {SELECT f1 FROM tbl2 WHERE f2==2000}
136  set sqlite_search_count
137} {29999}
138
139# Make sure we can optimize functions in the WHERE clause that
140# use fields from two or more different table.  (Bug #6)
141#
142do_test select2-4.1 {
143  execsql {
144    CREATE TABLE aa(a);
145    CREATE TABLE bb(b);
146    INSERT INTO aa VALUES(1);
147    INSERT INTO aa VALUES(3);
148    INSERT INTO bb VALUES(2);
149    INSERT INTO bb VALUES(4);
150    SELECT * FROM aa, bb WHERE max(a,b)>2;
151  }
152} {1 4 3 2 3 4}
153do_test select2-4.2 {
154  execsql {
155    INSERT INTO bb VALUES(0);
156    SELECT * FROM aa, bb WHERE b;
157  }
158} {1 2 1 4 3 2 3 4}
159do_test select2-4.3 {
160  execsql {
161    SELECT * FROM aa, bb WHERE NOT b;
162  }
163} {1 0 3 0}
164do_test select2-4.4 {
165  execsql {
166    SELECT * FROM aa, bb WHERE min(a,b);
167  }
168} {1 2 1 4 3 2 3 4}
169do_test select2-4.5 {
170  execsql {
171    SELECT * FROM aa, bb WHERE NOT min(a,b);
172  }
173} {1 0 3 0}
174do_test select2-4.6 {
175  execsql {
176    SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 1 END;
177  }
178} {1 2 3 4}
179do_test select2-4.7 {
180  execsql {
181    SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 0 ELSE 1 END;
182  }
183} {1 4 1 0 3 2 3 0}
184
185finish_test
186