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Overview
Comment:Update documentation prior to the release of 2.6.0. (CVS 683)
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SHA1: f2d9191381e956900a14bd80e50678b9d49e19e5
User & Date: drh 2002-07-18 02:07:08
Context
2002-07-18
02:50
Version 2.6.0 Release 1 (CVS 684) (check-in: dde65e9e user: drh tags: trunk)
02:07
Update documentation prior to the release of 2.6.0. (CVS 683) (check-in: f2d91913 user: drh tags: trunk)
01:27
Make the automatic database upgrade work even if there are triggers. Add tests for automatic upgrade and for failing if reading a more advanced version of the database. Ticket #107. (CVS 682) (check-in: 0493e39c user: drh tags: trunk)
Changes
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Changes to test/version.test. 

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#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the ability of the library to detect
# past or future file format version numbers and respond appropriately.
#
# $Id: version.test,v 1.1 2002/07/18 01:27:19 drh Exp $

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

# Current file format version
set VX 3

................................................................................
} {101 102 103 104 105 106 107 108}
do_test version-1.14 {
  execsql {
    SELECT * FROM v2;
  }
} {16 0}
















finish_test








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#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the ability of the library to detect
# past or future file format version numbers and respond appropriately.
#
# $Id: version.test,v 1.2 2002/07/18 02:07:08 drh Exp $

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

# Current file format version
set VX 3

................................................................................
} {101 102 103 104 105 106 107 108}
do_test version-1.14 {
  execsql {
    SELECT * FROM v2;
  }
} {16 0}

# Try to do an upgrade where the database file is read-only
#
do_test version-2.1 {
  db close
  set m2 [lreplace $::meta 2 2 2]
  btree_begin_transaction $::bt
  eval btree_update_meta $::bt $m2
  btree_commit $::bt
  btree_close $::bt
  catch {file attributes test.db -permissions 0444}
  catch {file attributes test.db -readonly 1}
  set rc [catch {sqlite db test.db} msg]
  lappend rc $msg
} {1 {unable to upgrade database to the version 2.6 format}}

finish_test

Changes to www/changes.tcl. 

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}


proc chng {date desc} {
  puts "<DT><B>$date</B></DT>"
  puts "<DD><P><UL>$desc</UL></P></DD>"
}












chng {2002 Jly 7 (2.5.6)} {
<li>Fix more problems with rollback.  Enhance the test suite to exercise
    the rollback logic extensively in order to prevent any future problems.
    </li>
}









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}


proc chng {date desc} {
  puts "<DT><B>$date</B></DT>"
  puts "<DD><P><UL>$desc</UL></P></DD>"
}

chng {2002 Jly 7 (2.6.0)} {
<li>Change the format of indices to correct a design flaw the originated
    with version 2.1.0.  <font color="red">*** This is an incompatible
    file format change ***</font>  When version 2.6.0 or later of the
    library attempts to open a database file created by version 2.5.6 or
    earlier, it will automatically and irreversibly convert the file format.
    <b>Make backup copies of older database files before opening them with
    version 2.6.0 of the library.</b>
    </li>
}

chng {2002 Jly 7 (2.5.6)} {
<li>Fix more problems with rollback.  Enhance the test suite to exercise
    the rollback logic extensively in order to prevent any future problems.
    </li>
}

Changes to www/formatchng.tcl. 

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#
# Run this Tcl script to generate the formatchng.html file.
#
set rcsid {$Id: formatchng.tcl,v 1.5 2002/06/20 11:41:59 drh Exp $ }

puts {<html>
<head>
  <title>File Format Changes in SQLite</title>
</head>
<body bgcolor=white>
<h1 align=center>
................................................................................
  <td>Beginning with version 2.5.0, SQLite added support for triggers. 
  Information about triggers is stored in the SQLITE_MASTER table.  If an older
  version of SQLite attempts to read a database that contains a CREATE TRIGGER
  in the SQLITE_MASTER table, the parser will not understand the new syntax
  and initialization will fail.
  </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>"




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#
# Run this Tcl script to generate the formatchng.html file.
#
set rcsid {$Id: formatchng.tcl,v 1.6 2002/07/18 02:07:08 drh Exp $ }

puts {<html>
<head>
  <title>File Format Changes in SQLite</title>
</head>
<body bgcolor=white>
<h1 align=center>
................................................................................
  <td>Beginning with version 2.5.0, SQLite added support for triggers. 
  Information about triggers is stored in the SQLITE_MASTER table.  If an older
  version of SQLite attempts to read a database that contains a CREATE TRIGGER
  in the SQLITE_MASTER table, the parser will not understand the new syntax
  and initialization will fail.
  </td>
</tr>
<tr>
  <td valign="top">2.5.6 to 2.6.0</td>
  <td valign="top">2002-July-17</td>
  <td>A design flaw in the layout of indices required a file format change
  to correct.  This change appeared in version 2.6.0.<p>

  If you use version 2.6.0 or later of the library to open a database file
  that was originally created by version 2.5.6 or earlier, an attempt to
  rebuild the database into the new format will occur automatically.
  This can take some time for a large database.  (Allow 1 or 2 seconds
  per megabyte of database under Unix - longer under Windows.)  This format
  conversion is irreversible.  It is <strong>strongly</strong> suggested
  that you make a backup copy of older database files prior to opening them
  with version 2.6.0 or later of the library, in case there are errors in
  the format conversion logic.<p>

  Version 2.6.0 or later of the library cannot open read-only database
  files from version 2.5.6 or earlier, since read-only files cannot be
  upgraded to the new format.</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>"

Changes to www/index.tcl. 

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#
# Run this TCL script to generate HTML for the index.html file.
#
set rcsid {$Id: index.tcl,v 1.59 2002/04/12 13:11:53 drh Exp $}

puts {<html>
<head><title>SQLite: An SQL Database Engine In A C Library</title></head>
<body bgcolor=white>
<h1 align=center>SQLite: An SQL Database Engine In A C Library</h1>
<p align=center>}
puts "This page was last modified on [lrange $rcsid 3 4] UTC<br>"
................................................................................
</td></tr>
</table>
}

puts {<h2>Features</h2>

<p><ul>
<li>Implements a large subset of SQL92.</li>
<li>A complete database (with multiple tables and indices) is
    stored in a single disk file.</li>
<li>Atomic commit and rollback protect data integrity.</li>
<li>Small memory footprint: less than 20K lines of C code.</li>
<li><a href="speed.html">Four times faster</a> than PostgreSQL.
    Twice as fast as SQLite 1.0.</li>
<li>Very simple 
................................................................................
<li>A TCL-based test suite provides near 100% code coverage.</li>
<li>Self-contained: no external dependencies.</li>
<li>Built and tested under Linux and Win2K.</li>
<li>Sources are uncopyrighted.  Use for any purpose.</li>
</ul>
</p>
}

























puts {<h2>Current Status</h2>

<p>A <a href="changes.html">Change Summary</a> is available on this
website.  You can also access a detailed
<a href="http://cvs.hwaci.com:2080/sqlite/timeline">change history</a>,
<a href="http://cvs.hwaci.com:2080/sqlite/rptview?rn=2">view open bugs</a>,




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#
# Run this TCL script to generate HTML for the index.html file.
#
set rcsid {$Id: index.tcl,v 1.60 2002/07/18 02:07:08 drh Exp $}

puts {<html>
<head><title>SQLite: An SQL Database Engine In A C Library</title></head>
<body bgcolor=white>
<h1 align=center>SQLite: An SQL Database Engine In A C Library</h1>
<p align=center>}
puts "This page was last modified on [lrange $rcsid 3 4] UTC<br>"
................................................................................
</td></tr>
</table>
}

puts {<h2>Features</h2>

<p><ul>
<li>Implements most of SQL92.</li>
<li>A complete database (with multiple tables and indices) is
    stored in a single disk file.</li>
<li>Atomic commit and rollback protect data integrity.</li>
<li>Small memory footprint: less than 20K lines of C code.</li>
<li><a href="speed.html">Four times faster</a> than PostgreSQL.
    Twice as fast as SQLite 1.0.</li>
<li>Very simple 
................................................................................
<li>A TCL-based test suite provides near 100% code coverage.</li>
<li>Self-contained: no external dependencies.</li>
<li>Built and tested under Linux and Win2K.</li>
<li>Sources are uncopyrighted.  Use for any purpose.</li>
</ul>
</p>
}

puts {<h2>Database File Format Change - 2002 July 17</h2>

<p>Beginning with version 2.6.0, the SQLite database file format changed
in an incompatible way.  If you open a database file from version 2.5.6
or earlier with version 2.6.0 or later of the library, then the file format
will be converted automatically.  This is an irreversible operation.  Once
the conversion occurs, you will no longer be able to access the database
file from older versions of the library.  If the database is large, the
conversion might take some time. (Allow 1 to 2 seconds per megabyte
of database under Linux.) If the database is read-only,
the conversion cannot occur and the attempt to open the database will
fail.
It is suggested that you make backup copies of older database files
before attempting to open them with version 2.6.0 or later of the library.</p>

<center>
<table width="50%" border=1 cellpadding=20 cellspacing=0>
<tr><td>
<b>Make backups of older database files before opening them
with version 2.6.0 or later of SQLite</b></td></tr>
</table>
</center>
}

puts {<h2>Current Status</h2>

<p>A <a href="changes.html">Change Summary</a> is available on this
website.  You can also access a detailed
<a href="http://cvs.hwaci.com:2080/sqlite/timeline">change history</a>,
<a href="http://cvs.hwaci.com:2080/sqlite/rptview?rn=2">view open bugs</a>,

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