SQLite

3.3.0

# 2001 September 15
#
# 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 runs all tests.
#
# $Id: all.test,v 1.34 2006/01/11 01:08:34 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl
rename finish_test really_finish_test
proc finish_test {} {memleak_check}

if {[file exists ./sqlite_test_count]} {

  crash.test
  autovacuum_crash.test
  quick.test
  malloc.test
  misuse.test
  memleak.test
}

# Files to include in the test.  If this list is empty then everything
# that is not in the EXCLUDE list is run.
#
set INCLUDE {
}

# Test files btree2.test and btree4.test don't work if the 
# SQLITE_DEFAULT_AUTOVACUUM macro is defined to true (because they depend
# on tables being allocated starting at page 2).
#
ifcapable default_autovacuum {
  lappend EXCLUDE btree2.test
  lappend EXCLUDE btree4.test
}

for {set Counter 0} {$Counter<$COUNT && $nErr==0} {incr Counter} {
  if {$Counter%2} {
    set ::SETUP_SQL {PRAGMA default_synchronous=off;}
  } else {
    catch {unset ::SETUP_SQL}
  }
  foreach testfile [lsort -dictionary [glob $testdir/*.test]] {
    set tail [file tail $testfile]
    if {[lsearch -exact $EXCLUDE $tail]>=0} continue
    if {[llength $INCLUDE]>0 && [lsearch -exact $INCLUDE $tail]<0} continue
    source $testfile
    catch {db close}
    if {$sqlite_open_file_count>0} {
      puts "$tail did not close all files: $sqlite_open_file_count"
      incr nErr
      lappend ::failList $tail
    }

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests the ability of the library to open
# many different databases at the same time without leaking memory.
#
# $Id: manydb.test,v 1.3 2006/01/11 01:08:34 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

set N 300

# First test how many file descriptors are available for use. To open a
# database for writing SQLite requires 3 file descriptors (the database, the
# journal and the directory).
set filehandles {}
catch {
  for {set i 0} {$i<($N * 3)} {incr i} {
    lappend filehandles [open testfile.1 w]
  }
}
foreach fd $filehandles {
  close $fd

# 2005 December 30
#
# 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.
#
#***********************************************************************
#
# $Id: shared.test,v 1.10 2006/01/11 01:08:34 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl
db close

ifcapable !shared_cache {
  finish_test

  sqlite3 db2 test.db
  execsql {
    PRAGMA auto_vacuum = 1;
    BEGIN;
    CREATE TABLE t1(a PRIMARY KEY, b);
    CREATE TABLE t2(a PRIMARY KEY, b);
  }
  set ::contents {}
  for {set i 0} {$i < 100} {incr i} {
    set a [string repeat "$i " 20]
    set b [string repeat "$i " 20]
    db eval {
      INSERT INTO t1 VALUES($a, $b);
    }
    lappend ::contents [list [expr $i+1] $a $b]

    }
  }
  set error
} {0}

catch {db close}
catch {db2 close}
unset -nocomplain contents

#--------------------------------------------------------------------------
# The following tests try to trick the shared-cache code into assuming
# the wrong encoding for a database.
#
file delete -force test.db test.db-journal
do_test shared-8.1.1 {

  db2 close
} {}

} ; # End shared-9.*

finish_test
sqlite3_enable_shared_cache $::enable_shared_cache

    set label [string map {. _} $vers]
    puts "<A NAME=\"version_$label\">"
  }
  puts "<DT><B>$date</B></DT>"
  puts "<DD><P><UL>$desc</UL></P></DD>"
}

chng {2006 January 10 (3.3.0 alpha)} {
<li>CHECK constraints</li>
<li>IF EXISTS and IF NOT EXISTS clauses on CREATE/DROP TABLE/INDEX.</li>
<li>DESC indices</li>
<li>More efficient encoding of boolean values resulting in smaller database
files</li>
<li>More aggressive SQLITE_OMIT_FLOATING_POINT</li>
<li>Separate INTEGER and REAL affinity</li>
<li>Added a virtual function layer for the OS interface</li>
<li>"exists" method added to the TCL interface</li>
<li>Improved response to out-of-memory errors</li>
<li>Database cache can be optionally shared between connections
in the same thread</li>
<li>Optional READ UNCOMMITTED isolation (instead of the default
isolation level of SERIALIZABLE) and table level locking when
database connections share a common cache.</li>
}

chng {2005 December 19 (3.2.8)} {
<li>Fix an obscure bug that can cause database corruption under the
following unusual circumstances: A large INSERT or UPDATE statement which 
is part of an even larger transaction fails due to a uniqueness contraint
but the containing transaction commits.</li>

#
# Run this script to generated a faq.html output file
#
set rcsid {$Id: faq.tcl,v 1.33 2006/01/11 01:08:34 drh Exp $}
source common.tcl
header {SQLite Frequently Asked Questions</title>}

set cnt 1
proc faq {question answer} {
  set ::faq($::cnt) [list [string trim $question] [string trim $answer]]
  incr ::cnt

  or more threads.</p>

  <p>An <b>sqlite3</b> structure can only be used in the same thread
  that called <a href="capi3ref#sqlite3_open">sqlite3_open</a> to create it.
  You cannot open a
  database in one thread then pass the handle off to another thread for
  it to use.  This is due to limitations (bugs?) in many common threading
  implementations such as on RedHat9.  Specifically, an fcntl() lock
  created by one thread cannot be removed or modified by a different
  thread on the troublesome systems.  And since SQLite uses fcntl()
  locks heavily for concurrency control, serious problems arise if you 
  start moving database connections across threads.</p>

  <p>There may be ways to work around the fcntl() lock problems in Linux,
  but they are complex and exceedingly difficult to test for correctness.
  For that reason, SQLite currently takes the safe
  approach and disallows the sharing of handles among threads.</p>

  <p>Under UNIX, you should not carry an open SQLite database across
  a fork() system call into the child process.  Problems will result
  if you do.</p>
}

#
# Run this Tcl script to generate the formatchng.html file.
#
set rcsid {$Id: formatchng.tcl,v 1.15 2006/01/11 01:08:34 drh Exp $ }
source common.tcl
header {File Format Changes in SQLite}
puts {
<h2>File Format Changes in SQLite</h2>

<p>
Every effort is made to keep SQLite fully backwards compatible from

  not be read by a version of SQLite prior to 3.1.4.  Running 
  <a href="lang_vacuum.html">VACUUM</a>
  after the ALTER TABLE
  restores the database to a format such that it can be read by earlier
  SQLite versions.</p>
  </td>
</tr>
<tr>
  <td valign="top">3.2.8 to 3.3.0</td>
  <td valign="top">2006-Jan-10</td>
  <td><p>Version 3.3.0 uses a new encoding for binary values that
  uses less disk space.  Version 3.3.0 can read and write database
  files created by prior versions of SQLite.  But prior versions
  of SQLite will not be able to read or write databases created
  by Version 3.3.0</p>
  </td>
</tr>
</table>
</blockquote>

<p>
To perform a database reload, have ready versions of the
<b>sqlite</b> command-line utility for both the old and new
version of SQLite.  Call these two executables "<b>sqlite-old</b>"

proc newsitem {date title text} {
  puts "<h3>$date - $title</h3>"
  regsub -all "\n( *\n)+" $text "</p>\n\n<p>" txt
  puts "<p>$txt</p>"
  puts "<hr width=\"50%\">"
}

newsitem {2006-Jan-10} {Version 3.3.0 alpha} {
  Version 3.3.0 adds support for CHECK constraints, DESC indices,
  separate REAL and INTEGER column affinities, a new OS interface layer
  design, and many other changes.  The code passed a regression
  test but should still be considered alpha.  Please report any
  problems.

  The file format for version 3.3.0 has changed slightly in order provide
  a more efficient encoding of binary values.  SQLite 3.3.0 will read and
  write legacy databases created with any prior version of SQLite 3.  But
  databases created by version 3.3.0 will not be readable or writable
  by earlier versions of the SQLite.  The older file format can be
  specified at compile-time for those rare cases where it is needed.
}

newsitem {2005-Dec-19} {Versions 3.2.8 and 2.8.17} {
  These versions contain one-line changes to 3.2.7 and 2.8.16 to fix a bug
  that has been present since March of 2002 and version 2.4.0.
  That bug might possibly cause database corruption if a large INSERT or
  UPDATE statement within a multi-statement transaction fails due to a
  uniqueness constraint but the containing transaction commits.

}


puts {
<p align="right"><a href="oldnews.html">Old news...</a></p>
</td></tr></table>
}
footer {$Id: index.tcl,v 1.129 2006/01/11 01:08:34 drh Exp $}