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