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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 3.31.1 On 2020-01-27</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">
+</form>
+</div>
+</div>
+<script>
+function toggle_div(nm) {
+var w = document.getElementById(nm);
+if( w.style.display=="block" ){
+w.style.display = "none";
+}else{
+w.style.display = "block";
+}
+}
+function toggle_search() {
+var w = document.getElementById("searchmenu");
+if( w.style.display=="block" ){
+w.style.display = "none";
+} else {
+w.style.display = "block";
+setTimeout(function(){
+document.getElementById("searchbox").focus()
+}, 30);
+}
+}
+function div_off(nm){document.getElementById(nm).style.display="none";}
+window.onbeforeunload = function(e){div_off("submenu");}
+/* Disable the Search feature if we are not operating from CGI, since */
+/* Search is accomplished using CGI and will not work without it. */
+if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
+document.getElementById("search_menubutton").style.display = "none";
+}
+/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
+function hideorshow(btn,obj){
+var x = document.getElementById(obj);
+var b = document.getElementById(btn);
+if( x.style.display!='none' ){
+x.style.display = 'none';
+b.innerHTML='show';
+}else{
+x.style.display = '';
+b.innerHTML='hide';
+}
+return false;
+}
+var antiRobot = 0;
+function antiRobotGo(){
+if( antiRobot!=3 ) return;
+antiRobot = 7;
+var j = document.getElementById("mtimelink");
+if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href");
+}
+function antiRobotDefense(){
+document.body.onmousedown=function(){
+antiRobot |= 2;
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+antiRobot |= 1;
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+}, 100)
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+antiRobotDefense();
+</script>
+<h2>SQLite Release 3.31.1 On 2020-01-27</h2><p><b>Prior changes from version 3.31.0 (2020-01-22):</b></p>
+<p><ol class='lessindent'>
+<li value='1'>Add support for <a href="../gencol.html">generated columns</a>.
+<li>Add the <a href="../c3ref/hard_heap_limit64.html">sqlite3_hard_heap_limit64()</a> interface and the corresponding
+    <a href="../pragma.html#pragma_hard_heap_limit">PRAGMA hard_heap_limit</a> command.
+<li>Enhance the <a href="../pragma.html#pragma_function_list">function_list pragma</a> to show the number of arguments on each
+    function, the type of function (scalar, aggregate, window), and the function
+    property flags <a href="../c3ref/c_deterministic.html#sqlitedeterministic">SQLITE_DETERMINISTIC</a>, <a href="../c3ref/c_deterministic.html#sqlitedirectonly">SQLITE_DIRECTONLY</a>,
+    <a href="../c3ref/c_deterministic.html#sqliteinnocuous">SQLITE_INNOCUOUS</a>, and/or <a href="../c3ref/c_deterministic.html#sqlitesubtype">SQLITE_SUBTYPE</a>.
+<li>Add the <a href="../dbstat.html#dbstatagg">aggregated mode</a> feature to the
+    <a href="../dbstat.html">DBSTAT virtual table</a>.
+<li>Add the <a href="../c3ref/open.html#opennofollow">SQLITE_OPEN_NOFOLLOW</a> option to <a href="../c3ref/open.html">sqlite3_open_v2()</a> that
+    prevents SQLite from opening symbolic links.
+<li>Added the "#-N" array notation for <a href="../json1.html#jsonpath">JSON function path arguments</a>.
+<li>Added the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigtrustedschema">SQLITE_DBCONFIG_TRUSTED_SCHEMA</a> connection setting which is
+    also controllable via the new <a href="../pragma.html#pragma_trusted_schema">trusted_schema pragma</a> and at compile-time
+    using the <a href="../compile.html#trusted_schema">-DSQLITE_TRUSTED_SCHEMA</a> compile-time option.
+<li>Added APIs <a href="../c3ref/filename_database.html">sqlite3_filename_database()</a>, <a href="../c3ref/filename_database.html">sqlite3_filename_journal()</a>, and
+    <a href="../c3ref/filename_database.html">sqlite3_filename_wal()</a> which are useful for specialized extensions.
+<li>Add the <a href="../c3ref/uri_boolean.html">sqlite3_uri_key()</a> interface.
+<li>Upgraded the <a href="../c3ref/uri_boolean.html">sqlite3_uri_parameter()</a> function so that it works with the
+    rollback journal or WAL filename in addition to the database filename.
+<li>Provide the ability to tag <a href="../appfunc.html">application-defined SQL functions</a> with
+    new properties <a href="../c3ref/c_deterministic.html#sqliteinnocuous">SQLITE_INNOCUOUS</a> or <a href="../c3ref/c_deterministic.html#sqlitedirectonly">SQLITE_DIRECTONLY</a>.
+<li>Add new verbs to <a href="../c3ref/vtab_config.html">sqlite3_vtab_config()</a> so that the <a href="../vtab.html#xconnect">xConnect</a> method
+    of virtual tables can declare the virtual table as
+    <a href="../c3ref/c_vtab_constraint_support.html#sqlitevtabinnocuous">SQLITE_VTAB_INNOCUOUS</a> or <a href="../c3ref/c_vtab_constraint_support.html#sqlitevtabdirectonly">SQLITE_VTAB_DIRECTONLY</a>.
+<li>Faster response to <a href="../c3ref/interrupt.html">sqlite3_interrupt()</a>.
+<li>Added the <a href="https://sqlite.org/src/file/ext/misc/uuid.c">uuid.c</a> extension module
+    implementing functions for processing RFC-4122 UUIDs.
+<li>The <a href="../malloc.html#lookaside">lookaside memory allocator</a> is enhanced to support two separate memory
+    pools with different sized allocations in each pool.  This allows more memory
+    allocations to be covered by lookaside while at the same time reducing the
+    heap memory usage to 48KB per connection, down from 120KB.
+<li>The <a href="../pragma.html#pragma_legacy_file_format">legacy_file_format pragma</a> is deactivated.  It is now a no-op.  In its place,
+    the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfiglegacyfileformat">SQLITE_DBCONFIG_LEGACY_FILE_FORMAT</a> option to <a href="../c3ref/db_config.html">sqlite3_db_config()</a> is
+    provided.  The legacy_file_format pragma is deactivated because (1) it is
+    rarely useful and (2) it is incompatible with <a href="../lang_vacuum.html">VACUUM</a> in schemas that have
+    tables with both generated columns and descending indexes.
+    Ticket <a href="https://www.sqlite.org/src/info/6484e6ce678fffab">6484e6ce678fffab</a>
+</ol>
+<p><b>Changes in this specific patch release, version 3.31.1 (2020-01-27):</b></p>
+<p><ol class='lessindent'>
+<li value='17'> Revert the data layout for an internal-use-only SQLite data structure.
+     Applications that use SQLite should never reference internal SQLite
+     data structures, but some do anyhow, and a change to one such
+     data structure in 3.30.0 broke a popular and widely-deployed
+     application.  Reverting that change in SQLite, at least temporarily,
+     gives developers of misbehaving applications time to fix their code.
+<li> Fix a typos in the sqlite3ext.h header file that prevented the
+     <a href="../c3ref/stmt_isexplain.html">sqlite3_stmt_isexplain()</a> and <a href="../c3ref/value_blob.html">sqlite3_value_frombind()</a> interfaces
+     from being called from <a href="../loadext.html">run-time loadable extensions</a>.
+<p><b>Hashes:</b>
+<li>SQLITE_SOURCE_ID: 2020-01-27 19:55:54 3bfa9cc97da10598521b342961df8f5f68c7388fa117345eeb516eaa837bb4d6
+<li>SHA3-256 for sqlite3.c: de465c64f09529429a38cbdf637acce4dfda6897f93e3db3594009e0fed56d27
+
+</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>
+    
+