160 lines
6.7 KiB
HTML
160 lines
6.7 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 3.25.0 On 2018-09-15</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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<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 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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}
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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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/* 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 3.25.0 On 2018-09-15</h2><p><ol class='lessindent'>
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<li> Add support for <a href="../windowfunctions.html">window functions</a>
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<li> Enhancements the <a href="../lang_altertable.html">ALTER TABLE</a> command:
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<ol type="a">
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<li> Add support for renaming columns within a table using
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ALTER TABLE <i>table</i> RENAME COLUMN <i>oldname</i> TO <i>newname</i>.
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<li> Fix table rename feature so that it also updates references
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to the renamed table in <a href="../lang_createtrigger.html">triggers</a> and <a href="../lang_createview.html">views</a>.
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</ol>
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<li> Query optimizer improvements:
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<ol type="a">
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<li> Avoid unnecessary loads of columns in an aggregate query that
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are not within an aggregate function and that are not part
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of the GROUP BY clause.
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<li> The IN-early-out optimization: When doing a look-up on a
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multi-column index and an IN operator is used on a column
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other than the left-most column, then if no rows match against
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the first IN value, check to make sure there exist rows that
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match the columns to the right before continuing with the
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next IN value.
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<li> Use the transitive property to try to propagate constant
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values within the WHERE clause. For example, convert
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"a=99 AND b=a" into "a=99 AND b=99".
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</ol>
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<li> Use a separate mutex on every inode in the unix <a href="../vfs.html">VFS</a>, rather than
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a single mutex shared among them all, for slightly better concurrency
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in multi-threaded environments.
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<li> Enhance the <a href="../pragma.html#pragma_integrity_check">PRAGMA integrity_check</a> command for improved detection
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of problems on the page freelist.
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<li> Output infinity as 1e999 in the ".dump" command of the
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<a href="../cli.html">command-line shell</a>.
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<li> Added the <a href="../c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntldataversion">SQLITE_FCNTL_DATA_VERSION</a> file-control.
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<li> Added the <a href="../geopoly.html">Geopoly module</a>
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<p><b>Bug fixes:</b>
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<li> The ORDER BY LIMIT optimization might have caused an infinite loop
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in the byte code of the prepared statement under very obscure
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circumstances,
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due to a confluence of minor defects in the query optimizer.
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Fix for ticket
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<a href="https://www.sqlite.org/src/info/9936b2fa443fec03ff25">9936b2fa443fec03ff25</a>
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<li> On an UPSERT when the order of constraint checks is rearranged,
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ensure that the affinity transformations on the inserted content
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occur before any of the constraint checks. Fix for ticket
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<a href="https://www.sqlite.org/src/info/79cad5e4b2e219dd197242e9e">79cad5e4b2e219dd197242e9e</a>.
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<li> Avoid using a prepared statement for ".stats on" command of the
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<a href="../cli.html">CLI</a> after it has been closed by the ".eqp full" logicc. Fix for ticket
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<a href="https://www.sqlite.org/src/info/7be932dfa60a8a6b3b26bcf76">7be932dfa60a8a6b3b26bcf76</a>.
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<li> The LIKE optimization was generating incorrect byte-code and hence
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getting the wrong answer
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if the left-hand operand has numeric affinity and the right-hand-side
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pattern is '/%' or if the pattern begins with the ESCAPE character.
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Fix for ticket
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<a href="https://www.sqlite.org/src/info/c94369cae9b561b1f996d0054b">c94369cae9b561b1f996d0054b</a>
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<p><b>Hashes:</b>
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<li>SQLITE_SOURCE_ID: "2018-09-15 04:01:47 b63af6c3bd33152742648d5d2e8dc5d5fcbcdd27df409272b6aea00a6f761760"
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<li>SHA3-256 for sqlite3.c: 989e3ff37f2b5eea8e42205f808ccf0ba86c6ea6aa928ad2c011f33a108ac45d
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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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