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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 14:07:11 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 14:07:11 +0000 |
commit | 63847496f14c813a5d80efd5b7de0f1294ffe1e3 (patch) | |
tree | 01c7571c7c762ceee70638549a99834fdd7c411b /www/uintcseq.html | |
parent | Initial commit. (diff) | |
download | sqlite3-63847496f14c813a5d80efd5b7de0f1294ffe1e3.tar.xz sqlite3-63847496f14c813a5d80efd5b7de0f1294ffe1e3.zip |
Adding upstream version 3.45.1.upstream/3.45.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'www/uintcseq.html')
-rw-r--r-- | www/uintcseq.html | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/www/uintcseq.html b/www/uintcseq.html new file mode 100644 index 0000000..1de4cdd --- /dev/null +++ b/www/uintcseq.html @@ -0,0 +1,193 @@ +<!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>The UINT Collating Sequence</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> +<div class=fancy> +<div class=nosearch> +<div class="fancy_title"> +The UINT Collating Sequence +</div> +</div> + + + + + +<h1 id="overview"><span>1. </span>Overview</h1> + +<p> The UINT collating sequences is a <a href="loadext.html">loadable extension</a> for +SQLite that implements a new collating sequence that compares text +containing unsigned integers in numeric order. + +</p><p> The UINT collating sequence is not a standard part of SQLite. +It must be loaded as a separate extension. The source code to +UINT is in the <a href="https://sqlite.org/src/file/ext/misc/uint.c">uint.c source file</a> +in the <a href="https://sqlite.org/src/file/ext/misc">ext/misc/ folder</a> of the +SQLite source tree. + +</p><p> The UINT collating sequence is not included in standard builds of +the SQLite library, but it is loaded by default in the <a href="cli.html">CLI</a>. This +is typical of the <a href="cli.html">CLI</a> which loads various extensions above and beyond +what are available in the standard SQLite library. + +</p><p> The UINT collating sequence works just like the default +BINARY collating sequence for text, except that embedded strings +of digits compare in numeric order. + +</p><ul> +<li><p> +Leading zeros are handled properly, in the sense that +they do not mess of the maginitude comparison of embedded +strings of digits. "x00123y" is equal to "x123y". + +</p></li><li><p> +Only unsigned integers are recognized. Plus and minus +signs are ignored. Decimal points and exponential notation +are ignored. + +</p></li><li><p> +Embedded integers can be of arbitrary length. Comparison +is not limited to integers that can be expressed as a +64-bit machine integer. +</p></li></ul> + +<h1 id="example_"><span>2. </span>Example:</h1> + +<blockquote> +<table border="1" cellspacing="0" cellpadding="10"> +<tr><th>COLLATE binary</th><th>COLLATE uint</th></tr> +<tr><td valign="top" align="left"><pre> +'0000123457' +'123456' +'abc0000000010xyz' +'abc0010xyy' +'abc10xzz' +'abc674xyz' +'abc87xyz' +'abc9xyz'</pre></td> +<td valign="top" align="left"><pre> +'123456' +'0000123457' +'abc9xyz' +'abc0010xyy' +'abc0000000010xyz' +'abc10xzz' +'abc87xyz' +'abc674xyz'</pre></td> +</tr></table> +</blockquote> +<p align="center"><small><i>This page last modified on <a href="https://sqlite.org/docsrc/honeypot" id="mtimelink" data-href="https://sqlite.org/docsrc/finfo/pages/uintcseq.in?m=36e3e7c849">2022-01-08 05:02:57</a> UTC </small></i></p> + |