diff options
Diffstat (limited to 'www/session/sqlite3session_diff.html')
-rw-r--r-- | www/session/sqlite3session_diff.html | 181 |
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..39b5e35 --- /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="../session/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="../session/objlist.html">Objects</a>, + <a href="../session/constlist.html">Constants</a>, and + <a href="../session/funclist.html">Functions</a>.</p> + |