167 lines
7.1 KiB
HTML
167 lines
7.1 KiB
HTML
<!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 3.17.0 On 2017-02-13</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="submit" value="Go">
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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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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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</script>
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</div>
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<h2>SQLite Release 3.17.0 On 2017-02-13</h2><p><ol class='lessindent'>
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<li>Approximately 25% better performance from the <a href="../rtree.html">R-Tree extension</a>.
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<ol type='a'>
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<li> Uses compiler built-ins (ex: __builtin_bswap32() or _byteswap_ulong())
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for byteswapping when available.
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<li> Uses the <a href="../c3ref/blob.html">sqlite3_blob</a> key/value access object instead of SQL
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for pulling content out of R-Tree nodes
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<li> Other miscellaneous enhancements such as loop unrolling.
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</ol>
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<li>Add the <a href="../compile.html#default_lookaside">SQLITE_DEFAULT_LOOKASIDE</a> compile-time option.
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<li>Increase the default <a href="../malloc.html#lookaside">lookaside</a>
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size from 512,125 to 1200,100
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as this provides better performance while only adding 56KB
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of extra memory per connection. Memory-sensitive
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applications can restore the old
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default at compile-time, start-time, or run-time.
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<li>Use compiler built-ins __builtin_sub_overflow(), __builtin_add_overflow(),
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and __builtin_mul_overflow() when available. (All compiler
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built-ins can be omitted with the <a href="../compile.html#disable_intrinsic">SQLITE_DISABLE_INTRINSIC</a> compile-time
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option.)
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<li>Added the <a href="../compile.html#enable_null_trim">SQLITE_ENABLE_NULL_TRIM</a> compile-time option, which
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can result in significantly smaller database files for some
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applications, at the risk of being incompatible with older
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versions of SQLite.
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<li>Change <a href="../compile.html#default_pcache_initsz">SQLITE_DEFAULT_PCACHE_INITSZ</a> from 100 to 20, for
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improved performance.
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<li>Added the SQLITE_UINT64_TYPE compile-time option as an
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analog to SQLITE_INT64_TYPE.
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<li>Perform some <a href="../lang_update.html">UPDATE</a> operations in a single pass instead of
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in two passes.
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<li>Enhance the <a href="../sessionintro.html">session extension</a> to support <a href="../withoutrowid.html">WITHOUT ROWID</a>
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tables.
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<li>Fixed performance problems and potential stack overflows
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when creating <a href="../lang_createview.html">views</a> from multi-row VALUES clauses with
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hundreds of thousands of rows.
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<li>Added the <a href="https://www.sqlite.org/src/file/ext/misc/sha1.c">sha1.c</a>
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extension.
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<li>In the <a href="../cli.html">command-line shell</a>, enhance the ".mode" command so that it
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restores the default column and row separators for modes "line",
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"list", "column", and "tcl".
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<li>Enhance the <a href="../compile.html#direct_overflow_read">SQLITE_DIRECT_OVERFLOW_READ</a> option so that it works
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in <a href="../wal.html">WAL mode</a> as long as the pages being read are not in the WAL file.
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<li>Enhance the
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<a href="../lemon.html">Lemon parser generator</a>
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so that it can store the parser object as a stack variable rather than
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allocating space from the heap and make use of that enhancement in
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the <a href="../amalgamation.html">amalgamation</a>.
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<li>Other performance improvements. Uses about <a href="../cpu.html">6.5% fewer CPU cycles</a>.
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<p><b>Bug Fixes:</b>
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<li>Throw an error if the ON clause of a LEFT JOIN references tables
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to the right of the ON clause. This is the same behavior as
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PostgreSQL. Formerly, SQLite silently converted the LEFT JOIN
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into an INNER JOIN. Fix for ticket
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<a href="https://www.sqlite.org/src/info/25e335f802dd">25e335f802dd</a>.
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<li>Use the correct affinity for columns of automatic indexes. Ticket
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<a href="https://www.sqlite.org/src/info/7ffd1ca1d2ad4ec">7ffd1ca1d2ad4ec</a>.
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<li>Ensure that the <a href="../c3ref/blob_reopen.html">sqlite3_blob_reopen()</a> interface can correctly
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handle short rows. Fix for ticket
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<a href="https://www.sqlite.org/src/info/e6e962d6b0f06f46e">e6e962d6b0f06f46e</a>.
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<p><b>Hashes:</b>
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<li>SQLITE_SOURCE_ID: "2017-02-13 16:02:40 ada05cfa86ad7f5645450ac7a2a21c9aa6e57d2c"
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<li>SHA1 for sqlite3.c: cc7d708bb073c44102a59ed63ce6142da1f174d1
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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="http://www.sqlite.org/src/timeline">
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SQLite version control site</a>.</p>
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