Documentation Source Text

    set saved_OUT $OUT
    file mkdir $DEST/releaselog
    set filename $DEST/releaselog/$tag.html
    set OUT [open $filename w]
    PutsHeader "SQLite Release $date" ../
    puts "<h2>SQLite Release of $date</h2>"
    puts "<p>Changes associated with this release include the following:</p>"
    regsub -all {<a href="(?!http:)} $desc {<a href="../} desc
    puts "<p><ul>$desc</ul></p>"
    putsin4 {
      <p>A <a href="../changes.html">complete list of SQLite releases</a>
      in a single pages is also available.  A detailed history of every
      check-in is available at
      <a href="http://www.sqlite.org/cvstrac/timeline">
      http://www.sqlite.org/cvstrac/timeline</a>.</p>
    }
    PutsFooter $DOC/pages/changes.in
    close $OUT
    set OUT $saved_OUT
  }
}

chng {2007 Dec 14 (3.5.4)} {
<li>Fix a critical bug in UPDATE or DELETE that occurs when an
OR REPLACE clause or a trigger causes rows in the same table to
be deleted as side effects.  (See ticket #2832.)  The most likely
result of this bug is a segmentation fault, though database
corruption is a possibility.</li>
<li>Bring the processing of ORDER BY into compliance with the 
SQL standard for case where a result alias and a table column name
are in conflict.  Correct behavior is to prefer the result alias.
Older versions of SQLite incorrectly picked the table column.
(See ticket #2822.)</li>
<li>The <a href="lang_vacuum.html">VACUUM</a> command preserves
the setting of the 
<a href="pragma.html#pragma_legacy_file_format">legacy_file_format pragma</a>.
(Ticket #2804.)</li>
<li>Productize and officially support the group_concat() SQL function.</li>
<li>Better optimization of some IN operator expressions.</li>
<li>Add the ability to change the 
<a href="pragma.html#pragma_auto_vacuum">auto_vacuum</a> status of a
database by setting the auto_vaccum pragma and VACUUMing the database.</li>
<li>Prefix search in FTS3 is much more efficient.</li>
<li>Relax the SQL statement length restriction in the CLI so that
the ".dump" output of databases with very large BLOBs and strings can
be played back to recreate the database.</li>
<li>Other small bug fixes and optimizations.</li>
}

chng {2007 Nov 27 (3.5.3)} {
<li>Move website and documentation files out of the source tree into
a <a href="http://www.sqlite.org/docsrc/">separate CM system</a>.
<li>Fix a long-standing bug in INSERT INTO ... SELECT ... statements
where the SELECT is compound.
<li>Fix a long-standing bug in RAISE(IGNORE) as used in BEFORE triggers.

</td>
<td width="20"></td><td bgcolor="#80a796" width="1"></td><td width="20"></td>
<td valign="top">
<h3>Current Status</h3>

<p><ul>
<li><a href="releaselog/3_5_4.html">Version 3.5.4</a>
of SQLite is stable and is recommended for all users.</li>
</ul></p>

<h3>Common Links</h3>

<p><ul>
<li> <a href="features.html">Features</a> </li>

The argument to ORDER BY is a list of expressions that are used as the
key for the sort.  The expressions do not have to be part of the
result for a simple SELECT, but in a compound SELECT each sort
expression must exactly match one of the result columns.  Each
sort expression may be optionally followed by a COLLATE keyword and
the name of a collating function used for ordering text and/or
keywords ASC or DESC to specify the sort order.</p>

<p>Each term of an ORDER BY expression is processed as follows:</p>

<ol>
<li><p>If the ORDER BY expression is a constant integer K then the
output is ordered by the K-th column of the result set.</p></li>
<li><p>If the ORDER BY expression is an identifier and one of the
output columns as an alias by the same name, then the output is
ordered by the identified column.</p></li>
<li><p>Otherwise, the ORDER BY expression is evaluated and the output 
is ordered by the value of that expression.</p></li>
</ol>

<p>In a compound SELECT statement, the third ORDER BY matching rule
requires that the expression be identical to one of the columns in
the result set.  The three rules are first applied to the left-most
SELECT in the compound.  If a match is found, the search stops.  Otherwise,
the next SELECT to the right is tried.  This continues until a match
is found.  Each term of the ORDER BY clause is processed separately 
and may come from different SELECT statements in the compound.</p>

<p>The LIMIT clause places an upper bound on the number of rows
returned in the result.  A negative LIMIT indicates no upper bound.
The optional OFFSET following LIMIT specifies how many
rows to skip at the beginning of the result set.
In a compound query, the LIMIT clause may only appear on the
final SELECT statement.

<title>Recent SQLite News</title>

<h2>Recent News</h2>

<tcl>
proc newsitem {date title text} {
  regsub -all {[^a-z0-9]} [string tolower $date] _ tag
  puts "<a name=\"$tag\"></a>"
  puts "<h3>$date - $title</h3>"
  regsub -all "\n( *\n)+" $text "</p>\n\n<p>" txt
  regsub -all {[Tt]icket #(\d+)} $txt \
      {<a href="http://www.sqlite.org/cvstrac/tktview?tn=\1">\0</a>} txt
  puts "<p>$txt</p>"
  puts "<hr width=\"50%\">"
}

newsitem {2007-Dec-14} {Version 3.5.4} {
  Version 3.5.4 fixes an long-standing but obscure bug in UPDATE and
  DELETE which might cause database corruption.  (See ticket #2832.)
  Upgrading is recommended for all users.

  This release also brings the processing of ORDER BY statements into
  compliance with standard SQL.  This could, in theory, cause problems
  for existing applications that depend on the older, buggy behavior.
  See ticket #2822 for additional information.
}

newsitem {2007-Dec-12} {SQLite Consortium Announced} {
  The <a href="consortium.html">SQLite Consortium</a> was launched
  today with <a href="http://www.mozilla.org/">Mozilla</a> and
  <a href="http://www.symbian.com/">Symbian</a> as charter members.
  As noted in the <a href="pressrelease-20071212.html">press release</a>,
  the Consortium's goal is to promote the continuing vitality and
  independence of SQLite.  
}

newsitem {2007-Nov-27} {Version 3.5.3} {
  This is an incremental release that fixes several minor problems.
  Upgrading is optional.  If Version 3.5.2 or 3.5.1 is working fine
  for you, then there is no pressing need to change to 3.5.3.

  The prebuilt binaries and the amalgamation found on the 
  <a href="download.html">download</a> page include the FTS3 fulltext
  search extension module.  We are doing this on an experimental
  basis and are not promising to provide prebuilt binaries with
  FTS3 in the future.
}





































</tcl>

<a href="oldnews.html">Old news...</a>

<title>SQLite Older News</title>

<tcl>
proc newsitem {date title text} {
  regsub -all {[^a-z0-9]} $date _ tag
  puts "<a name=\"$tag\"></a>"
  puts "<h3>$date - $title</h3>"
  regsub -all "\n( *\n)+" $text "</p>\n\n<p>" txt
  puts "<p>$txt</p>"
  puts "<hr width=\"50%\">"
}

newsitem {2007-Nov-05} {Version 3.5.2} {
  This is an incremental release that fixes several minor problems,
  adds some obscure features, and provides some performance tweaks.  
  Upgrading is optional.

  The experimental compile-time option
  SQLITE_OMIT_MEMORY_ALLOCATION is no longer supported.  On the other
  hand, it is now possible to compile SQLite so that it uses a static
  array for all its dynamic memory allocation needs and never calls
  malloc.  Expect to see additional radical changes to the memory 
  allocation subsystem in future releases.
}

newsitem {2007-Oct-04} {Version 3.5.1} {
  Fix a long-standing bug that might cause database corruption if a
  disk-full error occurs in the middle of a transaction and that
  transaction is not rolled back.
  <a href="http://www.sqlite.org/cvstrac/tktview?tn=2686">Ticket #2686.</a>

  The new VFS layer is stable.  However, we still reserve the right to
  make tweaks to the interface definition of the VFS if necessary.
}

newsitem {2007-Sep-04} {Version 3.5.0 alpha} {
  The OS interface layer and the memory allocation subsystems in
  SQLite have been reimplemented.  The published API is largely unchanged
  but the (unpublished) OS interface has been modified extensively.  
  Applications that implement their own OS interface will require
  modification.  See
  <a href="34to35.html">34to35.html</a> for details.<p>

  This is a large change.  Approximately 10% of the source code was
  modified.  We are calling this first release "alpha" in order to give
  the user community time to test and evaluate the changes before we
  freeze the new design.
}

newsitem {2007-Aug-13} {Version 3.4.2} {
  While stress-testing the 
  <a href="c3ref/soft_heap_limit.html">soft_heap_limit</a>
  feature, a bug that could lead to
  <a href="http://www.sqlite.org/cvstrac/wiki?p=DatabaseCorruption">database
  corruption</a> was <a href="http://www.sqlite.org/cvstrac/tktview?tn=2565">

  putsin4 {<body>
    <div><!-- container div to satisfy validator -->
    
    <a href="${path}index.html">
    <img class="logo" src="${path}images/SQLite.gif" alt="SQLite Logo"
     border="0"></a>
    <div><!-- IE hack to prevent disappearing logo--></div>
    <div class="tagline">Small. Fast. Reliable.<br>Choose any three.</div>
    
    <table width=100% style="clear:both"><tr><td>
      <div class="se"><div class="sw"><div class="ne"><div class="nw">
      <div class="toolbar">
        <a href="${path}about.html">About</a>
        <a href="${path}sitemap.html">Sitemap</a>
        <a href="${path}docs.html">Documentation</a>