182 lines
7.6 KiB
HTML
182 lines
7.6 KiB
HTML
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<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="../sqlite.css" rel="stylesheet">
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<title>SQLite Release 3.40.0 On 2022-11-16</title>
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<!-- path=../ -->
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</head>
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<body>
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<div class=nosearch>
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<a href="../index.html">
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<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
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</a>
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<div><!-- IE hack to prevent disappearing logo --></div>
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<div class="tagline desktoponly">
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<div class="menu mainmenu">
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<ul>
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<li><a href="../index.html">Home</a>
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<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
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<li class='wideonly'><a href='../about.html'>About</a>
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<li class='desktoponly'><a href="../docs.html">Documentation</a>
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<li class='desktoponly'><a href="../download.html">Download</a>
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<li class='wideonly'><a href='../copyright.html'>License</a>
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<li class='desktoponly'><a href="../support.html">Support</a>
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<li class='desktoponly'><a href="../prosupport.html">Purchase</a>
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<li class='search' id='search_menubutton'>
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<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
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</ul>
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</div>
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<div class="menu submenu" id="submenu">
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<ul>
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<li><a href='../about.html'>About</a>
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<li><a href='../docs.html'>Documentation</a>
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<li><a href='../download.html'>Download</a>
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<li><a href='../support.html'>Support</a>
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<li><a href='../prosupport.html'>Purchase</a>
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</ul>
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</div>
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<div class="searchmenu" id="searchmenu">
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<form method="GET" action="../search">
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<select name="s" id="searchtype">
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<option value="d">Search Documentation</option>
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<option value="c">Search Changelog</option>
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</select>
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<input type="text" name="q" id="searchbox" value="">
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<input type="submit" value="Go">
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</form>
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</div>
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</div>
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<script>
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function toggle_div(nm) {
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var w = document.getElementById(nm);
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if( w.style.display=="block" ){
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w.style.display = "none";
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}else{
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w.style.display = "block";
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}
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}
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function toggle_search() {
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var w = document.getElementById("searchmenu");
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if( w.style.display=="block" ){
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w.style.display = "none";
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} else {
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w.style.display = "block";
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setTimeout(function(){
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document.getElementById("searchbox").focus()
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}, 30);
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}
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}
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function div_off(nm){document.getElementById(nm).style.display="none";}
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window.onbeforeunload = function(e){div_off("submenu");}
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/* Disable the Search feature if we are not operating from CGI, since */
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/* Search is accomplished using CGI and will not work without it. */
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if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
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document.getElementById("search_menubutton").style.display = "none";
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}
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/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
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function hideorshow(btn,obj){
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var x = document.getElementById(obj);
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var b = document.getElementById(btn);
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if( x.style.display!='none' ){
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x.style.display = 'none';
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b.innerHTML='show';
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}else{
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x.style.display = '';
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b.innerHTML='hide';
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}
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return false;
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}
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var antiRobot = 0;
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function antiRobotGo(){
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if( antiRobot!=3 ) return;
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antiRobot = 7;
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var j = document.getElementById("mtimelink");
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if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href");
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}
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function antiRobotDefense(){
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document.body.onmousedown=function(){
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antiRobot |= 2;
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antiRobotGo();
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document.body.onmousedown=null;
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}
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document.body.onmousemove=function(){
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antiRobot |= 2;
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antiRobotGo();
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document.body.onmousemove=null;
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}
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setTimeout(function(){
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antiRobot |= 1;
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antiRobotGo();
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}, 100)
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antiRobotGo();
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}
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antiRobotDefense();
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</script>
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<h2>SQLite Release 3.40.0 On 2022-11-16</h2><p><ol class='lessindent'>
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<li> Add support for compiling <a href="https://sqlite.org/wasm">SQLite to WASM</a>
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and running it in web browsers. NB: The WASM build and its interfaces
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are considered "beta" and are subject to minor changes if the need
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arises. We anticipate finalizing the interface for the next release.
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<li> Add the <a href="../recovery.html">recovery extension</a> that might be able to recover some content
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from a corrupt database file.
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<li> Query planner enhancements:
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<ol type="a">
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<li> Recognize <a href="../queryplanner.html#covidx">covering indexes</a> on tables with more than 63 columns where
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columns beyond the 63rd column are used in the query and/or are
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referenced by the index.
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<li> Extract the values of expressions contained within <a href="../expridx.html">expression indexes</a>
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where practical, rather than recomputing the expression.
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<li> The NOT NULL and IS NULL operators (and their equivalents) avoid
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loading the content of large strings and BLOB values from disk.
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<li> Avoid materializing a view on which a full scan is performed
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exactly once. Use and discard the rows of the view as they are computed.
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<li> Allow flattening of a subquery that is the right-hand operand of
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a LEFT JOIN in an aggregate query.
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</ol>
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<li> A new typedef named <a href="../c3ref/filename.html">sqlite3_filename</a> is added and used to represent
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the name of a database file. Various interfaces are
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modified to use the new typedef instead of "char*". This interface
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change should be fully backwards compatible, though it might cause
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(harmless) compiler warnings when rebuilding some legacy applications.
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<li> Add the <a href="../c3ref/value_encoding.html">sqlite3_value_encoding()</a> interface.
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<li> Security enhancement: <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigdefensive">SQLITE_DBCONFIG_DEFENSIVE</a> is augmented to prohibit
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changing the <a href="../pragma.html#pragma_schema_version">schema_version</a>. The schema_version
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becomes read-only in defensive mode.
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<li> Enhancements to the <a href="../pragma.html#pragma_integrity_check">PRAGMA integrity_check</a> statement:
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<ol type="a">
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<li> Columns in non-STRICT tables with TEXT affinity should not contain numeric values.
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<li> Columns in non-STRICT tables with NUMERIC affinity should not
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contain TEXT values that could be converted into numbers.
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<li> Verify that the rows of a <a href="../withoutrowid.html">WITHOUT ROWID</a> table are in the correct order.
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</ol>
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<li> Enhance the <a href="../lang_vacuum.html#vacuuminto">VACUUM INTO</a> statement so that it honors the
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<a href="../pragma.html#pragma_synchronous">PRAGMA synchronous</a> setting.
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<li> Enhance the <a href="../c3ref/strglob.html">sqlite3_strglob()</a> and <a href="../c3ref/strlike.html">sqlite3_strlike()</a> APIs so that they are able
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to accept NULL pointers for their string parameters and still generate a sensible
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result.
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<li> Provide the new <a href="../compile.html#max_allocation_size">SQLITE_MAX_ALLOCATION_SIZE</a> compile-time option for limiting
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the size of memory allocations.
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<li> Change the algorithm used by SQLite's built-in pseudo-random number generator (PRNG)
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from RC4 to Chacha20.
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<li> Allow two or more indexes to have the same name as long as they are all in
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separate schemas.
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<li> Miscellaneous performance optimizations result in about 1% fewer CPU cycles
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used on typical workloads.
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<p><b>Hashes:</b>
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<li>SQLITE_SOURCE_ID: 2022-11-16 12:10:08 89c459e766ea7e9165d0beeb124708b955a4950d0f4792f457465d71b158d318
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<li>SHA3-256 for sqlite3.c: ab8da6bc754642989e67d581f26683dc705b068cea671970f0a7d32cfacbad19
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</ol></p>
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<p>A <a href="../changes.html">complete list of SQLite releases</a>
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in a single page and a <a href="../chronology.html">chronology</a> are both also available.
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A detailed history of every
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check-in is available at
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<a href="https://www.sqlite.org/src/timeline">
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SQLite version control site</a>.</p>
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