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1# 2005 December 21
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 script is descending indices.
13#
14# $Id: descidx2.test,v 1.5 2008/03/19 00:21:31 drh Exp $
15#
16
17set testdir [file dirname $argv0]
18source $testdir/tester.tcl
19
20# Do not use a codec for tests in this file, as the database file is
21# manipulated directly using tcl scripts (using the [hexio_write] command).
22#
23do_not_use_codec
24
25
26db eval {PRAGMA legacy_file_format=OFF}
27
28# This procedure sets the value of the file-format in file 'test.db'
29# to $newval. Also, the schema cookie is incremented.
30#
31proc set_file_format {newval} {
32  hexio_write test.db 44 [hexio_render_int32 $newval]
33  set schemacookie [hexio_get_int [hexio_read test.db 40 4]]
34  incr schemacookie
35  hexio_write test.db 40 [hexio_render_int32 $schemacookie]
36  return {}
37}
38
39# This procedure returns the value of the file-format in file 'test.db'.
40#
41proc get_file_format {{fname test.db}} {
42  return [hexio_get_int [hexio_read $fname 44 4]]
43}
44
45
46# Verify that the file format starts as 4
47#
48do_test descidx2-1.1 {
49  execsql {
50    CREATE TABLE t1(a,b);
51    CREATE INDEX i1 ON t1(b ASC);
52  }
53  get_file_format
54} {4}
55do_test descidx2-1.2 {
56  execsql {
57    CREATE INDEX i2 ON t1(a DESC);
58  }
59  get_file_format
60} {4}
61
62# Before adding any information to the database, set the file format
63# back to three.  Then close and reopen the database.  With the file
64# format set to three, SQLite should ignore the DESC argument on the
65# index.
66#
67do_test descidx2-2.0 {
68  set_file_format 3
69  db close
70  sqlite3 db test.db
71  get_file_format
72} {3}
73
74# Put some information in the table and verify that the DESC
75# on the index is ignored.
76#
77do_test descidx2-2.1 {
78  execsql {
79    INSERT INTO t1 VALUES(1,1);
80    INSERT INTO t1 VALUES(2,2);
81    INSERT INTO t1 SELECT a+2, a+2 FROM t1;
82    INSERT INTO t1 SELECT a+4, a+4 FROM t1;
83    SELECT b FROM t1 WHERE a>3 AND a<7;
84  }
85} {4 5 6}
86do_test descidx2-2.2 {
87  execsql {
88    SELECT a FROM t1 WHERE b>3 AND b<7;
89  }
90} {4 5 6}
91do_test descidx2-2.3 {
92  execsql {
93    SELECT b FROM t1 WHERE a>=3 AND a<7;
94  }
95} {3 4 5 6}
96do_test descidx2-2.4 {
97  execsql {
98    SELECT b FROM t1 WHERE a>3 AND a<=7;
99  }
100} {4 5 6 7}
101do_test descidx2-2.5 {
102  execsql {
103    SELECT b FROM t1 WHERE a>=3 AND a<=7;
104  }
105} {3 4 5 6 7}
106do_test descidx2-2.6 {
107  execsql {
108    SELECT a FROM t1 WHERE b>=3 AND b<=7;
109  }
110} {3 4 5 6 7}
111
112# This procedure executes the SQL.  Then it checks to see if the OP_Sort
113# opcode was executed.  If an OP_Sort did occur, then "sort" is appended
114# to the result.  If no OP_Sort happened, then "nosort" is appended.
115#
116# This procedure is used to check to make sure sorting is or is not
117# occurring as expected.
118#
119proc cksort {sql} {
120  set ::sqlite_sort_count 0
121  set data [execsql $sql]
122  if {$::sqlite_sort_count} {set x sort} {set x nosort}
123  lappend data $x
124  return $data
125}
126
127# Test sorting using a descending index.
128#
129do_test descidx2-3.1 {
130  cksort {SELECT a FROM t1 ORDER BY a}
131} {1 2 3 4 5 6 7 8 nosort}
132do_test descidx2-3.2 {
133  cksort {SELECT a FROM t1 ORDER BY a ASC}
134} {1 2 3 4 5 6 7 8 nosort}
135do_test descidx2-3.3 {
136  cksort {SELECT a FROM t1 ORDER BY a DESC}
137} {8 7 6 5 4 3 2 1 nosort}
138do_test descidx2-3.4 {
139  cksort {SELECT b FROM t1 ORDER BY a}
140} {1 2 3 4 5 6 7 8 nosort}
141do_test descidx2-3.5 {
142  cksort {SELECT b FROM t1 ORDER BY a ASC}
143} {1 2 3 4 5 6 7 8 nosort}
144do_test descidx2-3.6 {
145  cksort {SELECT b FROM t1 ORDER BY a DESC}
146} {8 7 6 5 4 3 2 1 nosort}
147do_test descidx2-3.7 {
148  cksort {SELECT a FROM t1 ORDER BY b}
149} {1 2 3 4 5 6 7 8 nosort}
150do_test descidx2-3.8 {
151  cksort {SELECT a FROM t1 ORDER BY b ASC}
152} {1 2 3 4 5 6 7 8 nosort}
153do_test descidx2-3.9 {
154  cksort {SELECT a FROM t1 ORDER BY b DESC}
155} {8 7 6 5 4 3 2 1 nosort}
156do_test descidx2-3.10 {
157  cksort {SELECT b FROM t1 ORDER BY b}
158} {1 2 3 4 5 6 7 8 nosort}
159do_test descidx2-3.11 {
160  cksort {SELECT b FROM t1 ORDER BY b ASC}
161} {1 2 3 4 5 6 7 8 nosort}
162do_test descidx2-3.12 {
163  cksort {SELECT b FROM t1 ORDER BY b DESC}
164} {8 7 6 5 4 3 2 1 nosort}
165
166do_test descidx2-3.21 {
167  cksort {SELECT a FROM t1 WHERE a>3 AND a<8 ORDER BY a}
168} {4 5 6 7 nosort}
169do_test descidx2-3.22 {
170  cksort {SELECT a FROM t1 WHERE a>3 AND a<8 ORDER BY a ASC}
171} {4 5 6 7 nosort}
172do_test descidx2-3.23 {
173  cksort {SELECT a FROM t1 WHERE a>3 AND a<8 ORDER BY a DESC}
174} {7 6 5 4 nosort}
175do_test descidx2-3.24 {
176  cksort {SELECT b FROM t1 WHERE a>3 AND a<8 ORDER BY a}
177} {4 5 6 7 nosort}
178do_test descidx2-3.25 {
179  cksort {SELECT b FROM t1 WHERE a>3 AND a<8 ORDER BY a ASC}
180} {4 5 6 7 nosort}
181do_test descidx2-3.26 {
182  cksort {SELECT b FROM t1 WHERE a>3 AND a<8 ORDER BY a DESC}
183} {7 6 5 4 nosort}
184
185finish_test
186