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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 3.40.1 On 2022-12-28</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>
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+<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>
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+<h2>SQLite Release 3.40.1 On 2022-12-28</h2><p><b>Changes in version 3.40.0 (2022-11-16):</b></p>
+<p><ol class='lessindent'>
+<li value='1'> Add support for compiling <a href="https://sqlite.org/wasm">SQLite to WASM</a>
+ and running it in web browsers. NB: The WASM build and its interfaces
+ are considered "beta" and are subject to minor changes if the need
+ arises. We anticipate finalizing the interface for the next release.
+<li> Add the <a href="../recovery.html">recovery extension</a> that might be able to recover some content
+ from a corrupt database file.
+<li> Query planner enhancements:
+ <ol type="a">
+ <li> Recognize <a href="../queryplanner.html#covidx">covering indexes</a> on tables with more than 63 columns where
+ columns beyond the 63rd column are used in the query and/or are
+ referenced by the index.
+ <li> Extract the values of expressions contained within <a href="../expridx.html">expression indexes</a>
+ where practical, rather than recomputing the expression.
+ <li> The NOT NULL and IS NULL operators (and their equivalents) avoid
+ loading the content of large strings and BLOB values from disk.
+ <li> Avoid materializing a view on which a full scan is performed
+ exactly once. Use and discard the rows of the view as they are computed.
+ <li> Allow flattening of a subquery that is the right-hand operand of
+ a LEFT JOIN in an aggregate query.
+ </ol>
+<li> A new typedef named <a href="../c3ref/filename.html">sqlite3_filename</a> is added and used to represent
+ the name of a database file. Various interfaces are
+ modified to use the new typedef instead of "char*". This interface
+ change should be fully backwards compatible, though it might cause
+ (harmless) compiler warnings when rebuilding some legacy applications.
+<li> Add the <a href="../c3ref/value_blob.html">sqlite3_value_encoding()</a> interface.
+<li> Security enhancement: <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigdefensive">SQLITE_DBCONFIG_DEFENSIVE</a> is augmented to prohibit
+ changing the <a href="../pragma.html#pragma_schema_version">schema_version</a>. The schema_version
+ becomes read-only in defensive mode.
+<li> Enhancements to the <a href="../pragma.html#pragma_integrity_check">PRAGMA integrity_check</a> statement:
+ <ol type="a">
+ <li> Columns in non-STRICT tables with TEXT affinity should not contain numeric values.
+ <li> Columns in non-STRICT tables with NUMERIC affinity should not
+ contain TEXT values that could be converted into numbers.
+ <li> Verify that the rows of a <a href="../withoutrowid.html">WITHOUT ROWID</a> table are in the correct order.
+ </ol>
+<li> Enhance the <a href="../lang_vacuum.html#vacuuminto">VACUUM INTO</a> statement so that it honors the
+ <a href="../pragma.html#pragma_synchronous">PRAGMA synchronous</a> setting.
+<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
+ to accept NULL pointers for their string parameters and still generate a sensible
+ result.
+<li> Provide the new <a href="../compile.html#max_allocation_size">SQLITE_MAX_ALLOCATION_SIZE</a> compile-time option for limiting
+ the size of memory allocations.
+<li> Change the algorithm used by SQLite's built-in pseudo-random number generator (PRNG)
+ from RC4 to Chacha20.
+<li> Allow two or more indexes to have the same name as long as they are all in
+ separate schemas.
+<li> Miscellaneous performance optimizations result in about 1% fewer CPU cycles
+ used on typical workloads.
+</ol>
+<p><b>Additional changes in version 3.40.1 (2022-12-28):</b></p>
+<p><ol class='lessindent'>
+<li value='14'> Fix the <a href="../cli.html#safemode">--safe command-line option</a> to the <a href="../cli.html">CLI</a> such that it correctly disallows the
+ use of SQL functions like writefile() that can cause harmful side-effects.
+<li> Fix a potential infinite loop in the <a href="../malloc.html#memsys5">memsys5</a> alternative memory allocator. This
+ bug was introduced by a performance optimization in version 3.39.0.
+<li> Various other obscure fixes.
+<p><b>Hashes:</b>
+<li>SQLITE_SOURCE_ID: 2022-12-28 14:03:47 df5c253c0b3dd24916e4ec7cf77d3db5294cc9fd45ae7b9c5e82ad8197f38a24
+<li>SHA3-256 for sqlite3.c: 4d6800e9032ff349376fe612e422b49ba5eb4e378fac0b3e405235d09dd366ab
+
+</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="http://www.sqlite.org/src/timeline">
+ SQLite version control site</a>.</p>
+
+