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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 3.28.0 On 2019-04-16</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">
+</form>
+</div>
+</div>
+<script>
+function toggle_div(nm) {
+var w = document.getElementById(nm);
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+w.style.display = "none";
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+w.style.display = "block";
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+}
+function toggle_search() {
+var w = document.getElementById("searchmenu");
+if( w.style.display=="block" ){
+w.style.display = "none";
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+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';
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+}
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+antiRobotDefense();
+</script>
+<h2>SQLite Release 3.28.0 On 2019-04-16</h2><p><ol class='lessindent'>
+<li> Enhanced <a href="../windowfunctions.html">window functions</a>:
+<ol type="a">
+ <li> Add support the <a href="../windowfunctions.html#wexcls">EXCLUDE clause</a>.
+ <li> Add support for <a href="../windowfunctions.html#wchaining">window chaining</a>.
+ <li> Add support for <a href="../windowfunctions.html#grouptype">GROUPS frames</a>.
+ <li> Add support for "<a href="../windowfunctions.html#exprrange">&lt;expr&gt; PRECEDING</a>" and
+ "<a href="../windowfunctions.html#exprrange">&lt;expr&gt; FOLLOWING</a>" boundaries
+ in RANGE <a href="../windowfunctions.html#framespec">frames</a>.
+</ol>
+<li> Added the new <a href="../c3ref/stmt_isexplain.html">sqlite3_stmt_isexplain(S)</a> interface for determining
+ whether or not a <a href="../c3ref/stmt.html">prepared statement</a> is an <a href="../lang_explain.html">EXPLAIN</a>.
+<li> Enhanced <a href="../lang_vacuum.html#vacuuminto">VACUUM INTO</a> so that it works for read-only databases.
+<li> New query optimizations:
+<ol type="a">
+ <li> Enable the <a href="../optoverview.html#like_opt">LIKE optimization</a> for cases when the ESCAPE keyword
+ is present and <a href="../pragma.html#pragma_case_sensitive_like">PRAGMA case_sensitive_like</a> is on.
+ <li> In queries that are driven by a <a href="../partialindex.html">partial index</a>, avoid unnecessary
+ tests of the constraint named in the WHERE clause of the partial
+ index, since we know that constraint must always be true.
+</ol>
+<li> Enhancements to the <a href="../tclsqlite.html">TCL Interface</a>:
+<ol type="a">
+ <li> Added the -returntype option to the <a href="../tclsqlite.html#function">function method</a>.
+ <li> Added the new <a href="../tclsqlite.html#bind_fallback">bind_fallback method</a>.
+</ol>
+<li> Enhancements to the <a href="../cli.html">CLI</a>:
+<ol type="a">
+ <li> Added support for <a href="../lang_expr.html#varparam">bound parameters</a> and the <a href="../cli.html#param">.parameter command</a>.
+ <li> Fix the <a href="../cli.html#fileio">readfile()</a> function so that it returns
+ an empty BLOB rather than throwing an out-of-memory error when
+ reading an empty file.
+ <li> Fix the <a href="../cli.html#fileio">writefile()</a> function so that when it
+ creates new directories along the path of a new file, it gives them
+ umask permissions rather than the same permissions as the file.
+ <li> Change <a href="../cli.html#arinsup">--update option</a> in the <a href="../cli.html#sqlar">.archive command</a> so that it skips
+ files that are already in the archive and are unchanged. Add the
+ new --insert option that works like --update used to work.
+</ol>
+<li> Added the <a href="https://sqlite.org/src/file/ext/misc/fossildelta.c">fossildelta.c</a>
+ extension that can create, apply, and deconstruct the
+ <a href="https://fossil-scm.org/fossil/doc/trunk/www/delta_format.wiki">Fossil DVCS file delta format</a>
+ that is used by the <a href="../rbu.html">RBU extension</a>.
+<li> Added the <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigwritableschema">SQLITE_DBCONFIG_WRITABLE_SCHEMA</a> verb for the <a href="../c3ref/db_config.html">sqlite3_db_config()</a>
+ interface, that does the same work as <a href="../pragma.html#pragma_writable_schema">PRAGMA writable_schema</a> without using the
+ SQL parser.
+<li> Added the <a href="../c3ref/value_blob.html">sqlite3_value_frombind()</a> API for determining if the argument
+ to an SQL function is from a <a href="../lang_expr.html#varparam">bound parameter</a>.
+<li> Security and compatibilities enhancements to <a href="../fts3.html#f3tknzr">fts3_tokenizer()</a>:
+<ol type="a">
+ <li> The <a href="../fts3.html#f3tknzr">fts3_tokenizer()</a> function always returns NULL
+ unless either the legacy application-defined FTS3 tokenizers interface
+ are enabled using
+ the <a href="../c3ref/db_config.html">sqlite3_db_config</a>(<a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigenablefts3tokenizer">SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</a>)
+ setting, or unless the first argument to fts3_tokenizer() is a <a href="../lang_expr.html#varparam">bound parameter</a>.
+ <li> The two-argument version of <a href="../fts3.html#f3tknzr">fts3_tokenizer()</a> accepts a pointer to the
+ tokenizer method object even without
+ the <a href="../c3ref/db_config.html">sqlite3_db_config</a>(<a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigenablefts3tokenizer">SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</a>) setting
+ if the second argument is a <a href="../lang_expr.html#varparam">bound parameter</a>
+</ol>
+<li> Improved robustness against corrupt database files.
+<li> Miscellaneous performance enhancements
+<li> Established a Git mirror of the offical SQLite source tree.
+ The canonical sources for SQLite are maintained using the
+ <a href="https://fossil-scm.org/">Fossil DVCS</a> at <a href="https://sqlite.org/src">https://sqlite.org/src</a>.
+ The Git mirror can be seen at <a href="https://github.com/sqlite/sqlite">https://github.com/sqlite/sqlite</a>.
+<p><b>Hashes:</b>
+<li>SQLITE_SOURCE_ID: 2019-04-16 19:49:53 884b4b7e502b4e991677b53971277adfaf0a04a284f8e483e2553d0f83156b50
+<li>SHA3-256 for sqlite3.c: 411efca996b65448d9798eb203d6ebe9627b7161a646f5d00911e2902a57b2e9
+
+</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>
+
+