# 2005 December 21

 #

 # The author disclaims copyright to this source code.  In place of

 # a legal notice, here is a blessing:

 #

 #    May you do good and not evil.

 #    May you find forgiveness for yourself and forgive others.

 #    May you share freely, never taking more than you give.

 #

 #*************************************************************************

 # This file implements regression tests for SQLite library.  The

 # focus of this script is descending indices.

 #

 # $Id: descidx2.test,v 1.5 2008/03/19 00:21:31 drh Exp $

 #

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 db eval {PRAGMA legacy_file_format=OFF}

 # This procedure sets the value of the file-format in file 'test.db'

 # to $newval. Also, the schema cookie is incremented.

 # 

 proc set_file_format {newval} {

   hexio_write test.db 44 [hexio_render_int32 $newval]

   set schemacookie [hexio_get_int [hexio_read test.db 40 4]]

   incr schemacookie

   hexio_write test.db 40 [hexio_render_int32 $schemacookie]

   return {}

 }

 # This procedure returns the value of the file-format in file 'test.db'.

 # 

 proc get_file_format {{fname test.db}} {

   return [hexio_get_int [hexio_read $fname 44 4]]

 }

 # Verify that the file format starts as 4

 #

 do_test descidx2-1.1 {

   execsql {

     CREATE TABLE t1(a,b);

     CREATE INDEX i1 ON t1(b ASC);

   }

   get_file_format

 } {4}

 do_test descidx2-1.2 {

   execsql {

     CREATE INDEX i2 ON t1(a DESC);

   }

   get_file_format

 } {4}

 # Before adding any information to the database, set the file format

 # back to three.  Then close and reopen the database.  With the file

 # format set to three, SQLite should ignore the DESC argument on the

 # index.

 #

 do_test descidx2-2.0 {

   set_file_format 3

   db close

   sqlite3 db test.db

   get_file_format

 } {3}

 # Put some information in the table and verify that the DESC

 # on the index is ignored.

 #

 do_test descidx2-2.1 {

   execsql {

     INSERT INTO t1 VALUES(1,1);

     INSERT INTO t1 VALUES(2,2);

     INSERT INTO t1 SELECT a+2, a+2 FROM t1;

     INSERT INTO t1 SELECT a+4, a+4 FROM t1;

     SELECT b FROM t1 WHERE a>3 AND a<7;

   }

 } {4 5 6}

 do_test descidx2-2.2 {

   execsql {

     SELECT a FROM t1 WHERE b>3 AND b<7;

   }

 } {4 5 6}

 do_test descidx2-2.3 {

   execsql {

     SELECT b FROM t1 WHERE a>=3 AND a<7;

   }

 } {3 4 5 6}

 do_test descidx2-2.4 {

   execsql {

     SELECT b FROM t1 WHERE a>3 AND a<=7;

   }

 } {4 5 6 7}

 do_test descidx2-2.5 {

   execsql {

     SELECT b FROM t1 WHERE a>=3 AND a<=7;

   }

 } {3 4 5 6 7}

 do_test descidx2-2.6 {

   execsql {

     SELECT a FROM t1 WHERE b>=3 AND b<=7;

   }

 } {3 4 5 6 7}

 # This procedure executes the SQL.  Then it checks to see if the OP_Sort

 # opcode was executed.  If an OP_Sort did occur, then "sort" is appended

 # to the result.  If no OP_Sort happened, then "nosort" is appended.

 #

 # This procedure is used to check to make sure sorting is or is not

 # occurring as expected.

 #

 proc cksort {sql} {

   set ::sqlite_sort_count 0

   set data [execsql $sql]

   if {$::sqlite_sort_count} {set x sort} {set x nosort}

   lappend data $x

   return $data

 }

 # Test sorting using a descending index.

 #

 do_test descidx2-3.1 {

   cksort {SELECT a FROM t1 ORDER BY a}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.2 {

   cksort {SELECT a FROM t1 ORDER BY a ASC}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.3 {

   cksort {SELECT a FROM t1 ORDER BY a DESC}

 } {8 7 6 5 4 3 2 1 nosort}

 do_test descidx2-3.4 {

   cksort {SELECT b FROM t1 ORDER BY a}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.5 {

   cksort {SELECT b FROM t1 ORDER BY a ASC}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.6 {

   cksort {SELECT b FROM t1 ORDER BY a DESC}

 } {8 7 6 5 4 3 2 1 nosort}

 do_test descidx2-3.7 {

   cksort {SELECT a FROM t1 ORDER BY b}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.8 {

   cksort {SELECT a FROM t1 ORDER BY b ASC}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.9 {

   cksort {SELECT a FROM t1 ORDER BY b DESC}

 } {8 7 6 5 4 3 2 1 nosort}

 do_test descidx2-3.10 {

   cksort {SELECT b FROM t1 ORDER BY b}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.11 {

   cksort {SELECT b FROM t1 ORDER BY b ASC}

 } {1 2 3 4 5 6 7 8 nosort}

 do_test descidx2-3.12 {

   cksort {SELECT b FROM t1 ORDER BY b DESC}

 } {8 7 6 5 4 3 2 1 nosort}

 do_test descidx2-3.21 {

   cksort {SELECT a FROM t1 WHERE a>3 AND a<8 ORDER BY a}

 } {4 5 6 7 nosort}

 do_test descidx2-3.22 {

   cksort {SELECT a FROM t1 WHERE a>3 AND a<8 ORDER BY a ASC}

 } {4 5 6 7 nosort}

 do_test descidx2-3.23 {

   cksort {SELECT a FROM t1 WHERE a>3 AND a<8 ORDER BY a DESC}

 } {7 6 5 4 nosort}

 do_test descidx2-3.24 {

   cksort {SELECT b FROM t1 WHERE a>3 AND a<8 ORDER BY a}

 } {4 5 6 7 nosort}

 do_test descidx2-3.25 {

   cksort {SELECT b FROM t1 WHERE a>3 AND a<8 ORDER BY a ASC}

 } {4 5 6 7 nosort}

 do_test descidx2-3.26 {

   cksort {SELECT b FROM t1 WHERE a>3 AND a<8 ORDER BY a DESC}

 } {7 6 5 4 nosort}

 finish_test