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 17 set testdir [file dirname $argv0] 18 source $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 # 23 do_not_use_codec 24 25 ifcapable !bloblit { 26 finish_test 27 return 28 } 29 db 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 # 34 proc 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 # 44 proc 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 # 50 do_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 # 62 do_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 76 do_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} 81 do_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 88 do_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} 93 do_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 # 103 do_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} 109 do_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} 114 do_test descidx3-3.3 { 115 execsql { 116 SELECT i FROM t1 WHERE b>0 AND b<'zzz' 117 } 118 } {6 8 3 4 2} 119 do_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} 124 do_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} 129 130 ifcapable 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 } 153 154 finish_test 155
