1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
<!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 3.34.0 On 2020-12-01</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 3.34.0 On 2020-12-01</h2><p><ol class='lessindent'>
<li> Added the <a href="../c3ref/txn_state.html">sqlite3_txn_state()</a> interface for reporting on the current
transaction state of the database connection.
<li> Enhance <a href="../lang_with.html#recursivecte">recursive common table expressions</a> to support two or more
recursive terms as is done by SQL Server, since this helps make
<a href="../lang_with.html#rcex3">queries against graphs</a> easier to write and faster to execute.
<li> Improved error messages on <a href="../lang_createtable.html#ckconst">CHECK constraint</a> failures.
<li> <a href="../cli.html">CLI</a> enhancements:
<ol type="a">
<li> The <a href="../cli.html#dotread">.read</a> dot-command now accepts a pipeline in addition to
a filename.
<li> Added options --data-only and --nosys to the <a href="../cli.html#dump">.dump</a> dot-command.
<li> Added the --nosys option to the <a href="../cli.html#dschema">.schema</a> dot-command.
<li> Table name quoting works correctly for the <a href="../cli.html#csv">.import</a> dot-command.
<li> The <a href="../series.html">generate_series(START,END,STEP)</a> table-valued function
extension is now built into the CLI.
<li> The <a href="../cli.html#dotdatabases">.databases</a> dot-command now shows the status of each database
file as determined by <a href="../c3ref/db_readonly.html">sqlite3_db_readonly()</a> and
<a href="../c3ref/txn_state.html">sqlite3_txn_state()</a>.
<li> Added the --tabs command-line option that sets
<a href="../cli.html#dotmode">.mode tabs</a>.
<li> The --init option reports an error if the file named as its argument
cannot be opened. The --init option also now honors the --bail option.
</ol>
<li> Query planner improvements:
<ol type="a">
<li> Improved estimates for the cost of running a DISTINCT operator.
<li> When doing an UPDATE or DELETE using a multi-column index where
only a few of the earlier columns of the index are useful for the
index lookup, postpone doing the main table seek until after all
WHERE clause constraints have been evaluated, in case those
constraints can be covered by unused later terms of the index,
thus avoiding unnecessary main table seeks.
<li> The new OP_SeekScan opcode is used to improve performance of
multi-column index look-ups when later columns are constrained
by an IN operator.
</ol>
<li> The <a href="../lang_transaction.html#immediate">BEGIN IMMEDIATE</a> and <a href="../lang_transaction.html#immediate">BEGIN EXCLUSIVE</a> commands now work even
if one or more attached database files are read-only.
<li> Enhanced <a href="../fts5.html">FTS5</a> to support <a href="../fts5.html#trigramidx">trigram indexes</a>.
<li> Improved performance of <a href="../wal.html">WAL mode</a> locking primitives in cases where
there are hundreds of connections all accessing the same database file
at once.
<li> Enhanced the <a href="../carray.html">carray() table-valued function</a> to include a single-argument
form that is bound using the auxiliary <a href="../carray.html#onearg">sqlite3_carray_bind()</a> interface.
<li> The <a href="../lang_corefunc.html#substr">substr() SQL function</a> can now also be called "substring()" for
compatibility with SQL Server.
<li> The <a href="../syntaxdiagrams.html">syntax diagrams</a> are now implemented as
<a href='https://pikchr.org/'>Pikchr</a> scripts and rendered
as SVG for improved legibility and ease of maintenance.
<p><b>Hashes:</b>
<li>SQLITE_SOURCE_ID: 2020-12-01 16:14:00 a26b6597e3ae272231b96f9982c3bcc17ddec2f2b6eb4df06a224b91089fed5b
<li>SHA3-256 for sqlite3.c: fbd895b0655a337b2cd657675f314188a4e9fe614444cc63dfeb3f066f674514
</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>
|
