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diff --git a/www/releaselog/3_35_4.html b/www/releaselog/3_35_4.html new file mode 100644 index 0000000..033fd59 --- /dev/null +++ b/www/releaselog/3_35_4.html @@ -0,0 +1,259 @@ +<!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 3.35.4 On 2021-04-02</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); +if( w.style.display=="block" ){ +w.style.display = "none"; +}else{ +w.style.display = "block"; +} +} +function toggle_search() { +var w = document.getElementById("searchmenu"); +if( w.style.display=="block" ){ +w.style.display = "none"; +} else { +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'; +} +return false; +} +var antiRobot = 0; +function antiRobotGo(){ +if( antiRobot!=3 ) return; +antiRobot = 7; +var j = document.getElementById("mtimelink"); +if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href"); +} +function antiRobotDefense(){ +document.body.onmousedown=function(){ +antiRobot |= 2; +antiRobotGo(); +document.body.onmousedown=null; +} +document.body.onmousemove=function(){ +antiRobot |= 2; +antiRobotGo(); +document.body.onmousemove=null; +} +setTimeout(function(){ +antiRobot |= 1; +antiRobotGo(); +}, 100) +antiRobotGo(); +} +antiRobotDefense(); +</script> +<h2>SQLite Release 3.35.4 On 2021-04-02</h2><p><b>Prior changes from version 3.35.0 (2021-03-12):</b></p> +<p><ol class='lessindent'> +<li value='1'> Added <a href="../lang_mathfunc.html">built-in SQL math functions()</a>. (Requires the + <a href="../compile.html#enable_math_functions">-DSQLITE_ENABLE_MATH_FUNCTIONS</a> compile-time option.) +<li> Added support for <a href="../lang_altertable.html#altertabdropcol">ALTER TABLE DROP COLUMN</a>. +<li> Generalize <a href="../lang_upsert.html">UPSERT</a>: + <ol type="a"> + <li> Allow multiple ON CONFLICT clauses that are evaluated in order, + <li> The final ON CONFLICT clause may omit the conflict target and + yet still use DO UPDATE. + </ol> +<li> Add support for the <a href="../lang_returning.html">RETURNING</a> clause on <a href="../lang_delete.html">DELETE</a>, <a href="../lang_insert.html">INSERT</a>, and + <a href="../lang_update.html">UPDATE</a> statements. +<li> Use less memory when running <a href="../lang_vacuum.html">VACUUM</a> on databases containing very large + TEXT or BLOB values. It is no longer necessary to hold the entire TEXT + or BLOB in memory all at once. +<li> Add support for the <a href="../lang_with.html#mathint">MATERIALIZED</a> and <a href="../lang_with.html#mathint">NOT MATERIALIZED</a> hints when + specifying <a href="../lang_with.html">common table expressions</a>. The default behavior was + formerly NOT MATERIALIZED, but is now changed to MATERIALIZED for + CTEs that are used more than once. +<li> The <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigenabletrigger">SQLITE_DBCONFIG_ENABLE_TRIGGER</a> and <a href="../c3ref/c_dbconfig_defensive.html#sqlitedbconfigenableview">SQLITE_DBCONFIG_ENABLE_VIEW</a> + settings are modified so that they only control triggers and views + in the main database schema or in attached database schemas and not in + the TEMP schema. TEMP triggers and views are always allowed. +<li> Query planner/optimizer improvements: + <ol type="a"> + <li> Enhancements to the <a href="../optoverview.html#minmax">min/max optimization</a> so that it works better + with the IN operator and the OP_SeekScan optimization of the + previous release. + <li> Attempt to process EXISTS operators in the WHERE clause as if + they were IN operators, in cases where this is a valid transformation + and seems likely to improve performance. + <li> Allow UNION ALL sub-queries to be <a href="../optoverview.html#flattening">flattened</a> even if the parent query is a join. + <li> Use an index, if appropriate, on IS NOT NULL expressions in the WHERE clause, + even if STAT4 is disabled. + <li> Expressions of the form "x IS NULL" or "x IS NOT NULL" might be converted to simply + FALSE or TRUE, if "x" is a column that has a "NOT NULL" constraint and is not + involved in an outer join. + <li> Avoid checking foreign key constraints on an UPDATE statement if the UPDATE does + not modify any columns associated with the foreign key. + <li> Allow WHERE terms to be <a href="../optoverview.html#pushdown">pushed down</a> into sub-queries + that contain window functions, + as long as the WHERE term is made up of entirely of constants and copies of expressions + found in the PARTITION BY clauses of all window functions in the sub-query. + </ol> +<li> <a href="../cli.html">CLI</a> enhancements: + <ol type="a"> + <li> Enhance the ".stats" command to accept new arguments "stmt" and + "vmstep", causing prepare statement statistics and only the + virtual-machine step count to be shown, respectively. + <li> Add the ".filectrl data_version" command. + <li> Enhance the ".once" and ".output" commands so that if the destination argument + begins with "|" (indicating that output is redirected into a pipe) then the + argument does not need to be quoted. + </ol> +<li> Bug fixes: + <ol type="a"> + <li> Fix a potential NULL pointer dereference when processing a + syntactically incorrect SELECT statement with a correlated WHERE + clause and a "HAVING 0" clause. (Also fixed in the 3.34.1 patch release.) + <li> Fix a <a href="https://www.sqlite.org/src/info/ee51301f316c09e9">bug in the IN-operator optimization</a> + of version 3.33.0 that can cause an incorrect answer. + <li> Fix incorrect answers from the <a href="../lang_expr.html#like">LIKE operator</a> if the pattern ends with "%" and there + is an "ESCAPE '_'" clause. + </ol> +</ol> +<p><b>Prior changes from version 3.35.1 (2021-03-15):</b></p> +<p><ol class='lessindent'> +<li value='11'> Fix <a href="https://www.sqlite.org/src/info/1c24a659e6d7f3a1">a bug</a> in the new DROP COLUMN + feature when used on columns that are indexed and that are quoted in the index + definition. +<li> Improve the built-in documentation for the <a href="../cli.html#dump">.dump</a> command in the <a href="../cli.html">CLI</a>. +</ol> +<p><b>Prior changes from version 3.35.2 (2021-03-17):</b></p> +<p><ol class='lessindent'> +<li value='13'> Fix a problem in the + <a href="https://www.sqlite.org/src/file/ext/misc/appendvfs.c">appendvfs.c</a> + extension that was introduced into version 3.35.0. +<li> Ensure that date/time functions with no arguments (which generate + responses that depend on the current time) are treated as + <a href="../deterministic.html">non-deterministic functions</a>. Ticket + <a href="https://sqlite.org/src/info/2c6c8689fb5f3d2f">2c6c8689fb5f3d2f</a> +<li> Fix a problem in the <a href="../sqldiff.html">sqldiff</a> utility program having to do with + unusual whitespace characters in a <a href="../vtab.html">virtual table</a> definition. +<li> Limit the new UNION ALL optimization described by item 8c in the + 3.35.0 release so that it does not try to make too many new subqueries. + See <a href="https://sqlite.org/forum/forumpost/140a67d3d2">forum thread 140a67d3d2</a> + for details. +</ol> +<p><b>Prior changes from version 3.35.3 (2021-03-26):</b></p> +<p><ol class='lessindent'> +<li value='17'> Enhance the OP_OpenDup opcode of the <a href="../opcode.html">bytecode engine</a> so that it works even if the + cursor being duplicated itself came from OP_OpenDup. Fix for + <a href="https://www.sqlite.org/src/info/bb8a9fd4a9b7fce5">ticket bb8a9fd4a9b7fce5</a>. + This problem only came to light due to the recent MATERIALIZED hint enhancement. +<li> When materializing correlated <a href="../lang_with.html">common table expressions</a>, do so separately for each + use case, as that is required for correctness. This fixes a problem that was + introduced by the MATERIALIZED hint enhancement. +<li> Fix a problem in the filename normalizer of the unix <a href="../vfs.html">VFS</a>. +<li> Fix the <a href="../cli.html#dotmode">"box" output mode</a> in the <a href="../cli.html">CLI</a> so that it works with statements that + returns one or more rows of zero columns (such as <a href="../pragma.html#pragma_incremental_vacuum">PRAGMA incremental_vacuum</a>). + <a href="https://sqlite.org/forum/forumpost/afbbcb5b72">Forum post afbbcb5b72</a>. +<li> Improvements to error messages generated by faulty common table expressions. + <a href="https://sqlite.org/forum/forumpost/aa5a0431c99e631">Forum post aa5a0431c99e</a>. +<li> Fix some incorrect assert() statements. +<li> Fix to the <a href="../syntax/select-stmt.html">SELECT statement syntax diagram</a> so that the FROM clause + syntax is shown correctly. + <a href="https://sqlite.org/forum/forumpost/9ed02582fe">Forum post 9ed02582fe</a>. +<li> Fix the EBCDIC character classifier so that it understands newlines as whitespace. + <a href="https://sqlite.org/forum/forumpost/58540ce22dcd5fdcd">Forum post 58540ce22dcd</a>. +<li> Improvements the <a href="../vtab.html#xbestindex">xBestIndex</a> method in the implementation of the + (unsupported) <a href="https://sqlite.org/src/file/ext/misc/wholenumber.c">wholenumber virtual table</a> + extension so that it does a better job of convincing the query planner to + avoid trying to materialize a table with an infinite number of rows. + <a href="https://sqlite.org/forum/forumpost/b52a020ce4">Forum post b52a020ce4</a>. +</ol> +<p><b>Changes in this specific patch release, version 3.35.4 (2021-04-02):</b></p> +<p><ol class='lessindent'> +<li value='26'> Fix a defect in the query planner optimization identified by + item 8b above. Ticket + <a href="https://sqlite.org/src/info/de7db14784a08053">de7db14784a08053</a>. +<li> Fix a defect in the new <a href="../lang_returning.html">RETURNING</a> syntax. Ticket + <a href="https://sqlite.org/src/info/132994c8b1063bfb">132994c8b1063bfb</a>. +<li> Fix the new <a href="../lang_returning.html">RETURNING</a> feature so that it raises an error if one of + the terms in the RETURNING clause references a unknown table, instead + of silently ignoring that error. +<li> Fix an assertion associated with aggregate function processing that + was incorrectly triggered by the <a href="../optoverview.html#pushdown">push-down optimization</a>. +<p><b>Hashes:</b> +<li>SQLITE_SOURCE_ID: 2021-04-02 15:20:15 5d4c65779dab868b285519b19e4cf9d451d50c6048f06f653aa701ec212df45e +<li>SHA3-256 for sqlite3.c: 528b8a26bf5ffd4c7b4647b5b799f86e8fb1a075f715b87a414e94fba3d09dbe + +</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> + + |