xref: /sqlite-3.40.0/test/descidx3.test (revision 66c48907) 
1# 2006 January 02
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: descidx3.test,v 1.6 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
25ifcapable !bloblit {
26  finish_test
27  return
28}
29#db eval {PRAGMA legacy_file_format=OFF}
30sqlite3_db_config db LEGACY_FILE_FORMAT 0
31
32# This procedure sets the value of the file-format in file 'test.db'
33# to $newval. Also, the schema cookie is incremented.
34#
35proc set_file_format {newval} {
36  hexio_write test.db 44 [hexio_render_int32 $newval]
37  set schemacookie [hexio_get_int [hexio_read test.db 40 4]]
38  incr schemacookie
39  hexio_write test.db 40 [hexio_render_int32 $schemacookie]
40  return {}
41}
42
43# This procedure returns the value of the file-format in file 'test.db'.
44#
45proc get_file_format {{fname test.db}} {
46  return [hexio_get_int [hexio_read $fname 44 4]]
47}
48
49# Verify that the file format starts as 4.
50#
51do_test descidx3-1.1 {
52  execsql {
53    CREATE TABLE t1(i INTEGER PRIMARY KEY,a,b,c,d);
54    CREATE INDEX t1i1 ON t1(a DESC, b ASC, c DESC);
55    CREATE INDEX t1i2 ON t1(b DESC, c ASC, d DESC);
56  }
57  get_file_format
58} {4}
59
60# Put some information in the table and verify that the descending
61# index actually works.
62#
63do_test descidx3-2.1 {
64  execsql {
65    INSERT INTO t1 VALUES(1, NULL, NULL, NULL, NULL);
66    INSERT INTO t1 VALUES(2, 2, 2, 2, 2);
67    INSERT INTO t1 VALUES(3, 3, 3, 3, 3);
68    INSERT INTO t1 VALUES(4, 2.5, 2.5, 2.5, 2.5);
69    INSERT INTO t1 VALUES(5, -5, -5, -5, -5);
70    INSERT INTO t1 VALUES(6, 'six', 'six', 'six', 'six');
71    INSERT INTO t1 VALUES(7, x'77', x'77', x'77', x'77');
72    INSERT INTO t1 VALUES(8, 'eight', 'eight', 'eight', 'eight');
73    INSERT INTO t1 VALUES(9, x'7979', x'7979', x'7979', x'7979');
74    SELECT count(*) FROM t1;
75  }
76} 9
77do_test descidx3-2.2 {
78  execsql {
79    SELECT i FROM t1 ORDER BY a;
80  }
81} {1 5 2 4 3 8 6 7 9}
82do_test descidx3-2.3 {
83  execsql {
84    SELECT i FROM t1 ORDER BY a DESC;
85  }
86} {9 7 6 8 3 4 2 5 1}
87
88# The "natural" order for the index is decreasing
89do_test descidx3-2.4 {
90  execsql {
91    SELECT i FROM t1 WHERE a<=x'7979';
92  }
93} {9 7 6 8 3 4 2 5}
94do_test descidx3-2.5 {
95  execsql {
96    SELECT i FROM t1 WHERE a>-99;
97  }
98} {9 7 6 8 3 4 2 5}
99
100# Even when all values of t1.a are the same, sorting by A returns
101# the rows in reverse order because this the natural order of the
102# index.
103#
104do_test descidx3-3.1 {
105  execsql {
106    UPDATE t1 SET a=1;
107    SELECT i FROM t1 ORDER BY a;
108  }
109} {9 7 6 8 3 4 2 5 1}
110do_test descidx3-3.2 {
111  execsql {
112    SELECT i FROM t1 WHERE a=1 AND b>0 AND b<'zzz'
113  }
114} {2 4 3 8 6}
115do_test descidx3-3.3 {
116  execsql {
117    SELECT i FROM t1 WHERE b>0 AND b<'zzz'
118  }
119} {6 8 3 4 2}
120do_test descidx3-3.4 {
121  execsql {
122    SELECT i FROM t1 WHERE a=1 AND b>-9999 AND b<x'ffffffff'
123  }
124} {5 2 4 3 8 6 7 9}
125do_test descidx3-3.5 {
126  execsql {
127    SELECT i FROM t1 WHERE b>-9999 AND b<x'ffffffff'
128  }
129} {9 7 6 8 3 4 2 5}
130
131ifcapable subquery {
132  # If the subquery capability is not compiled in to the binary, then
133  # the IN(...) operator is not available. Hence these tests cannot be
134  # run.
135  do_test descidx3-4.1 {
136    lsort [execsql {
137      UPDATE t1 SET a=2 WHERE i<6;
138      SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz';
139    }]
140  } {2 3 4 6 8}
141  do_test descidx3-4.2 {
142    execsql {
143      UPDATE t1 SET a=1;
144      SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz';
145    }
146  } {2 4 3 8 6}
147  do_test descidx3-4.3 {
148    execsql {
149      UPDATE t1 SET b=2;
150      SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz';
151    }
152  } {9 7 6 8 3 4 2 5 1}
153}
154
155finish_test
156