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diff --git a/www/c3ref/errcode.html b/www/c3ref/errcode.html new file mode 100644 index 0000000..cfdfdce --- /dev/null +++ b/www/c3ref/errcode.html @@ -0,0 +1,194 @@ +<!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>Error Codes And Messages</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> +<!-- keywords: sqlite3_errcode sqlite3_errmsg sqlite3_errmsg16 sqlite3_error_offset sqlite3_errstr sqlite3_extended_errcode --> +<div class=nosearch> +<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a> +<h2>Error Codes And Messages</h2> +</div> +<blockquote><pre> +int sqlite3_errcode(sqlite3 *db); +int sqlite3_extended_errcode(sqlite3 *db); +const char *sqlite3_errmsg(sqlite3*); +const void *sqlite3_errmsg16(sqlite3*); +const char *sqlite3_errstr(int); +int sqlite3_error_offset(sqlite3 *db); +</pre></blockquote> +<p> +If the most recent sqlite3_* API call associated with +<a href="../c3ref/sqlite3.html">database connection</a> D failed, then the sqlite3_errcode(D) interface +returns the numeric <a href="../rescode.html">result code</a> or <a href="../rescode.html#extrc">extended result code</a> for that +API call. +The sqlite3_extended_errcode() +interface is the same except that it always returns the +<a href="../rescode.html#extrc">extended result code</a> even when extended result codes are +disabled.</p> + +<p>The values returned by sqlite3_errcode() and/or +sqlite3_extended_errcode() might change with each API call. +Except, there are some interfaces that are guaranteed to never +change the value of the error code. The error-code preserving +interfaces include the following:</p> + +<p><ul> +<li> sqlite3_errcode() +<li> sqlite3_extended_errcode() +<li> sqlite3_errmsg() +<li> sqlite3_errmsg16() +<li> sqlite3_error_offset() +</ul></p> + +<p>The sqlite3_errmsg() and sqlite3_errmsg16() return English-language +text that describes the error, as either UTF-8 or UTF-16 respectively, +or NULL if no error message is available. +(See how SQLite handles <a href="../invalidutf.html">invalid UTF</a> for exceptions to this rule.) +Memory to hold the error message string is managed internally. +The application does not need to worry about freeing the result. +However, the error string might be overwritten or deallocated by +subsequent calls to other SQLite interface functions.</p> + +<p>The sqlite3_errstr(E) interface returns the English-language text +that describes the <a href="../rescode.html">result code</a> E, as UTF-8, or NULL if E is not an +result code for which a text error message is available. +Memory to hold the error message string is managed internally +and must not be freed by the application.</p> + +<p>If the most recent error references a specific token in the input +SQL, the sqlite3_error_offset() interface returns the byte offset +of the start of that token. The byte offset returned by +sqlite3_error_offset() assumes that the input SQL is UTF8. +If the most recent error does not reference a specific token in the input +SQL, then the sqlite3_error_offset() function returns -1.</p> + +<p>When the serialized <a href="../threadsafe.html">threading mode</a> is in use, it might be the +case that a second error occurs on a separate thread in between +the time of the first error and the call to these interfaces. +When that happens, the second error will be reported since these +interfaces always report the most recent result. To avoid +this, each thread can obtain exclusive use of the <a href="../c3ref/sqlite3.html">database connection</a> D +by invoking <a href="../c3ref/mutex_alloc.html">sqlite3_mutex_enter</a>(<a href="../c3ref/db_mutex.html">sqlite3_db_mutex</a>(D)) before beginning +to use D and invoking <a href="../c3ref/mutex_alloc.html">sqlite3_mutex_leave</a>(<a href="../c3ref/db_mutex.html">sqlite3_db_mutex</a>(D)) after +all calls to the interfaces listed here are completed.</p> + +<p>If an interface fails with SQLITE_MISUSE, that means the interface +was invoked incorrectly by the application. In that case, the +error code and message may or may not be set. +</p><p>See also lists of + <a href="../c3ref/objlist.html">Objects</a>, + <a href="../c3ref/constlist.html">Constants</a>, and + <a href="../c3ref/funclist.html">Functions</a>.</p> + |