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+<!DOCTYPE html>
+<html><head>
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<link href="../sqlite.css" rel="stylesheet">
+<title>SQLite Release 3.9.1 On 2015-10-16</title>
+<!-- path=../ -->
+</head>
+<body>
+<div class=nosearch>
+<a href="../index.html">
+<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
+</a>
+<div><!-- IE hack to prevent disappearing logo --></div>
+<div class="tagline desktoponly">
+Small. Fast. Reliable.<br>Choose any three.
+</div>
+<div class="menu mainmenu">
+<ul>
+<li><a href="../index.html">Home</a>
+<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
+<li class='wideonly'><a href='../about.html'>About</a>
+<li class='desktoponly'><a href="../docs.html">Documentation</a>
+<li class='desktoponly'><a href="../download.html">Download</a>
+<li class='wideonly'><a href='../copyright.html'>License</a>
+<li class='desktoponly'><a href="../support.html">Support</a>
+<li class='desktoponly'><a href="../prosupport.html">Purchase</a>
+<li class='search' id='search_menubutton'>
+<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
+</ul>
+</div>
+<div class="menu submenu" id="submenu">
+<ul>
+<li><a href='../about.html'>About</a>
+<li><a href='../docs.html'>Documentation</a>
+<li><a href='../download.html'>Download</a>
+<li><a href='../support.html'>Support</a>
+<li><a href='../prosupport.html'>Purchase</a>
+</ul>
+</div>
+<div class="searchmenu" id="searchmenu">
+<form method="GET" action="../search">
+<select name="s" id="searchtype">
+<option value="d">Search Documentation</option>
+<option value="c">Search Changelog</option>
+</select>
+<input type="text" name="q" id="searchbox" value="">
+<input type="submit" value="Go">
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+<h2>SQLite Release 3.9.1 On 2015-10-16</h2><p><b>Prior changes from version 3.9.0 (2015-10-14):</b></p>
+<p><ol class='lessindent'>
+<p><b>Policy Changes:</b>
+<li value='1'>The <a href="../versionnumbers.html">version numbering conventions</a> for SQLite are revised to use the
+    emerging standard of <a href="http://semver.org/">semantic versioning</a>.
+<p><b>New Features And Enhancements:</b>
+<li>Added <a href="../json1.html">the json1 extension</a> module in the source tree, and in the <a href="../amalgamation.html">amalgamation</a>.
+    Enable support using the <a href="../compile.html#enable_json1">SQLITE_ENABLE_JSON1</a> compile-time option.
+<li>Added <a href="../fts5.html">Full Text Search version 5 (FTS5)</a> to the <a href="../amalgamation.html">amalgamation</a>, enabled
+    using <a href="../compile.html#enable_fts5">SQLITE_ENABLE_FTS5</a>.  FTS5 will be considered "experimental" (subject
+    to incompatible changes) for at least one more release cycle.
+<li>The <a href="../lang_createview.html">CREATE VIEW</a> statement now accepts an optional list of
+    column names following the view name.
+<li>Added support for <a href="../expridx.html">indexes on expressions</a>.
+<li>Added support for <a href="../vtab.html#tabfunc2">table-valued functions</a> in the FROM clause of a
+    <a href="../lang_select.html">SELECT</a> statement.
+<li>Added support for <a href="../vtab.html#epovtab">eponymous virtual tables</a>.
+<li>A <a href="../lang_createview.html">VIEW</a> may now reference undefined tables and functions when
+    initially created.  Missing tables and functions are reported when
+    the VIEW is used in a query.
+<li>Added the <a href="../c3ref/value_subtype.html">sqlite3_value_subtype()</a> and <a href="../c3ref/result_subtype.html">sqlite3_result_subtype()</a>
+    interfaced (used by <a href="../json1.html">the json1 extension</a>).
+<li>The query planner is now able to use <a href="../partialindex.html">partial indexes</a> that contain
+    AND-connected terms in the WHERE clause.
+<li>The sqlite3_analyzer.exe utility is updated to report the depth of
+    each btree and to show the average fanout for indexes and
+    WITHOUT ROWID tables.
+<li>Enhanced the <a href="../dbstat.html">dbstat virtual table</a> so that it can be used as a
+    <a href="../vtab.html#tabfunc2">table-valued function</a> where the argument is the schema to be
+    analyzed.
+<p><b>Other changes:</b>
+<li>The <a href="../c3ref/aggregate_count.html">sqlite3_memory_alarm()</a> interface, which has been deprecated and
+    undocumented for 8 years, is changed into a no-op.
+<p><b>Important fixes:</b>
+<li>Fixed a critical bug in the
+    <a href="https://www.sqlite.org/see/doc/trunk/www/readme.wiki">SQLite Encryption Extension</a> that
+    could cause the database to become unreadable and unrecoverable if a <a href="../lang_vacuum.html">VACUUM</a> command
+    changed the size of the encryption nonce.
+<li>Added a memory barrier in the implementation of
+    <a href="../c3ref/initialize.html">sqlite3_initialize()</a> to help ensure that it is thread-safe.
+<li>Fix the <a href="../optoverview.html#or_opt">OR optimization</a> so that it always ignores subplans that
+    do not use an index.
+<li>Do not apply the WHERE-clause pushdown optimization on terms that originate
+    in the ON or USING clause of a LEFT JOIN.  Fix for ticket
+    <a href="https://www.sqlite.org/src/info/c2a19d81652f40568c">c2a19d81652f40568c</a>.
+
+</ol>
+<p><b>Changes in this specific patch release, version 3.9.1 (2015-10-16):</b></p>
+<p><ol class='lessindent'>
+<li value='18'>Fix <a href="../json1.html">the json1 extension</a> so that it does <u>not</u> recognize ASCII form-feed as a
+    whitespace character, in order to comply with RFC-7159.  Fix for ticket
+    <a href="https://www.sqlite.org/src/info/57eec374ae1d0a1d">57eec374ae1d0a1d</a>
+<li>Add a few #ifdef and build script changes to address compilation issues that
+    appeared after the 3.9.0 release.
+
+<li>SQLITE_SOURCE_ID: ""2015-10-16 17:31:12 767c1727fec4ce11b83f25b3f1bfcfe68a2c8b02"
+<li>SHA1 for sqlite3.c: 5e6d1873a32d82c2cf8581f143649940cac8ae49
+
+</ol></p>
+
+      <p>A <a href="../changes.html">complete list of SQLite releases</a>
+      in a single page and a <a href="../chronology.html">chronology</a> are both also available.
+      A detailed history of every
+      check-in is available at
+      <a href="https://www.sqlite.org/src/timeline">
+      SQLite version control site</a>.</p>
+    
+