1 files changed, 181 insertions, 0 deletions
diff --git a/www/session/sqlite3session_diff.html b/www/session/sqlite3session_diff.html
new file mode 100644
index 0000000..cb4e478
--- /dev/null
+++ b/www/session/sqlite3session_diff.html
@@ -0,0 +1,181 @@
+<!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>Load The Difference Between Tables Into A Session</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>
+<a href="intro.html"><h2>Session Module C Interface</h2></a><h2>Load The Difference Between Tables Into A Session</h2><blockquote><pre>int sqlite3session_diff(
+  sqlite3_session *pSession,
+  const char *zFromDb,
+  const char *zTbl,
+  char **pzErrMsg
+);
+</pre></blockquote><p>
+If it is not already attached to the session object passed as the first
+argument, this function attaches table zTbl in the same manner as the
+<a href="../session/sqlite3session_attach.html">sqlite3session_attach()</a> function. If zTbl does not exist, or if it
+does not have a primary key, this function is a no-op (but does not return
+an error).</p>
+
+<p>Argument zFromDb must be the name of a database ("main", "temp" etc.)
+attached to the same database handle as the session object that contains 
+a table compatible with the table attached to the session by this function.
+A table is considered compatible if it:</p>
+
+<p><ul>
+  <li> Has the same name,
+  <li> Has the same set of columns declared in the same order, and
+  <li> Has the same PRIMARY KEY definition.
+</ul></p>
+
+<p>If the tables are not compatible, SQLITE_SCHEMA is returned. If the tables
+are compatible but do not have any PRIMARY KEY columns, it is not an error
+but no changes are added to the session object. As with other session
+APIs, tables without PRIMARY KEYs are simply ignored.</p>
+
+<p>This function adds a set of changes to the session object that could be
+used to update the table in database zFrom (call this the "from-table") 
+so that its content is the same as the table attached to the session 
+object (call this the "to-table"). Specifically:</p>
+
+<p><ul>
+  <li> For each row (primary key) that exists in the to-table but not in 
+    the from-table, an INSERT record is added to the session object.</p>
+
+<p>  <li> For each row (primary key) that exists in the to-table but not in 
+    the from-table, a DELETE record is added to the session object.</p>
+
+<p>  <li> For each row (primary key) that exists in both tables, but features 
+    different non-PK values in each, an UPDATE record is added to the
+    session.  
+</ul></p>
+
+<p>To clarify, if this function is called and then a changeset constructed
+using <a href="../session/sqlite3session_changeset.html">sqlite3session_changeset()</a>, then after applying that changeset to 
+database zFrom the contents of the two compatible tables would be 
+identical.</p>
+
+<p>It an error if database zFrom does not exist or does not contain the
+required compatible table.</p>
+
+<p>If the operation is successful, SQLITE_OK is returned. Otherwise, an SQLite
+error code. In this case, if argument pzErrMsg is not NULL, *pzErrMsg
+may be set to point to a buffer containing an English language error 
+message. It is the responsibility of the caller to free this buffer using
+sqlite3_free().
+</p><p>See also lists of
+  <a href="objlist.html">Objects</a>,
+  <a href="constlist.html">Constants</a>, and
+  <a href="funclist.html">Functions</a>.</p>
+