# 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