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|    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 ifcapable !bloblit { |  | 
|   21   finish_test |  | 
|   22   return |  | 
|   23 } |  | 
|   24 db eval {PRAGMA legacy_file_format=OFF} |  | 
|   25  |  | 
|   26 # This procedure sets the value of the file-format in file 'test.db' |  | 
|   27 # to $newval. Also, the schema cookie is incremented. |  | 
|   28 #  |  | 
|   29 proc set_file_format {newval} { |  | 
|   30   hexio_write test.db 44 [hexio_render_int32 $newval] |  | 
|   31   set schemacookie [hexio_get_int [hexio_read test.db 40 4]] |  | 
|   32   incr schemacookie |  | 
|   33   hexio_write test.db 40 [hexio_render_int32 $schemacookie] |  | 
|   34   return {} |  | 
|   35 } |  | 
|   36  |  | 
|   37 # This procedure returns the value of the file-format in file 'test.db'. |  | 
|   38 #  |  | 
|   39 proc get_file_format {{fname test.db}} { |  | 
|   40   return [hexio_get_int [hexio_read $fname 44 4]] |  | 
|   41 } |  | 
|   42  |  | 
|   43 # Verify that the file format starts as 4. |  | 
|   44 # |  | 
|   45 do_test descidx3-1.1 { |  | 
|   46   execsql { |  | 
|   47     CREATE TABLE t1(i INTEGER PRIMARY KEY,a,b,c,d); |  | 
|   48     CREATE INDEX t1i1 ON t1(a DESC, b ASC, c DESC); |  | 
|   49     CREATE INDEX t1i2 ON t1(b DESC, c ASC, d DESC); |  | 
|   50   } |  | 
|   51   get_file_format |  | 
|   52 } {4} |  | 
|   53  |  | 
|   54 # Put some information in the table and verify that the descending |  | 
|   55 # index actually works. |  | 
|   56 # |  | 
|   57 do_test descidx3-2.1 { |  | 
|   58   execsql { |  | 
|   59     INSERT INTO t1 VALUES(1, NULL, NULL, NULL, NULL); |  | 
|   60     INSERT INTO t1 VALUES(2, 2, 2, 2, 2); |  | 
|   61     INSERT INTO t1 VALUES(3, 3, 3, 3, 3); |  | 
|   62     INSERT INTO t1 VALUES(4, 2.5, 2.5, 2.5, 2.5); |  | 
|   63     INSERT INTO t1 VALUES(5, -5, -5, -5, -5); |  | 
|   64     INSERT INTO t1 VALUES(6, 'six', 'six', 'six', 'six'); |  | 
|   65     INSERT INTO t1 VALUES(7, x'77', x'77', x'77', x'77'); |  | 
|   66     INSERT INTO t1 VALUES(8, 'eight', 'eight', 'eight', 'eight'); |  | 
|   67     INSERT INTO t1 VALUES(9, x'7979', x'7979', x'7979', x'7979'); |  | 
|   68     SELECT count(*) FROM t1; |  | 
|   69   } |  | 
|   70 } 9 |  | 
|   71 do_test descidx3-2.2 { |  | 
|   72   execsql { |  | 
|   73     SELECT i FROM t1 ORDER BY a; |  | 
|   74   } |  | 
|   75 } {1 5 2 4 3 8 6 7 9} |  | 
|   76 do_test descidx3-2.3 { |  | 
|   77   execsql { |  | 
|   78     SELECT i FROM t1 ORDER BY a DESC; |  | 
|   79   } |  | 
|   80 } {9 7 6 8 3 4 2 5 1} |  | 
|   81  |  | 
|   82 # The "natural" order for the index is decreasing |  | 
|   83 do_test descidx3-2.4 { |  | 
|   84   execsql { |  | 
|   85     SELECT i FROM t1 WHERE a<=x'7979'; |  | 
|   86   } |  | 
|   87 } {9 7 6 8 3 4 2 5} |  | 
|   88 do_test descidx3-2.5 { |  | 
|   89   execsql { |  | 
|   90     SELECT i FROM t1 WHERE a>-99; |  | 
|   91   } |  | 
|   92 } {9 7 6 8 3 4 2 5} |  | 
|   93  |  | 
|   94 # Even when all values of t1.a are the same, sorting by A returns |  | 
|   95 # the rows in reverse order because this the natural order of the |  | 
|   96 # index. |  | 
|   97 # |  | 
|   98 do_test descidx3-3.1 { |  | 
|   99   execsql { |  | 
|  100     UPDATE t1 SET a=1; |  | 
|  101     SELECT i FROM t1 ORDER BY a; |  | 
|  102   } |  | 
|  103 } {9 7 6 8 3 4 2 5 1} |  | 
|  104 do_test descidx3-3.2 { |  | 
|  105   execsql { |  | 
|  106     SELECT i FROM t1 WHERE a=1 AND b>0 AND b<'zzz' |  | 
|  107   } |  | 
|  108 } {2 4 3 8 6} |  | 
|  109 do_test descidx3-3.3 { |  | 
|  110   execsql { |  | 
|  111     SELECT i FROM t1 WHERE b>0 AND b<'zzz' |  | 
|  112   } |  | 
|  113 } {6 8 3 4 2} |  | 
|  114 do_test descidx3-3.4 { |  | 
|  115   execsql { |  | 
|  116     SELECT i FROM t1 WHERE a=1 AND b>-9999 AND b<x'ffffffff' |  | 
|  117   } |  | 
|  118 } {5 2 4 3 8 6 7 9} |  | 
|  119 do_test descidx3-3.5 { |  | 
|  120   execsql { |  | 
|  121     SELECT i FROM t1 WHERE b>-9999 AND b<x'ffffffff' |  | 
|  122   } |  | 
|  123 } {9 7 6 8 3 4 2 5} |  | 
|  124  |  | 
|  125 ifcapable subquery { |  | 
|  126   # If the subquery capability is not compiled in to the binary, then |  | 
|  127   # the IN(...) operator is not available. Hence these tests cannot be  |  | 
|  128   # run. |  | 
|  129   do_test descidx3-4.1 { |  | 
|  130     execsql { |  | 
|  131       UPDATE t1 SET a=2 WHERE i<6; |  | 
|  132       SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz'; |  | 
|  133     } |  | 
|  134   } {8 6 2 4 3} |  | 
|  135   do_test descidx3-4.2 { |  | 
|  136     execsql { |  | 
|  137       UPDATE t1 SET a=1; |  | 
|  138       SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz'; |  | 
|  139     } |  | 
|  140   } {2 4 3 8 6} |  | 
|  141   do_test descidx3-4.3 { |  | 
|  142     execsql { |  | 
|  143       UPDATE t1 SET b=2; |  | 
|  144       SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz'; |  | 
|  145     } |  | 
|  146   } {9 7 6 8 3 4 2 5 1} |  | 
|  147 } |  | 
|  148  |  | 
|  149 finish_test |  | 
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