138 lines
5.1 KiB
HTML
138 lines
5.1 KiB
HTML
<!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>Prepared Statement Scan Status</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;
|
|
}
|
|
</script>
|
|
</div>
|
|
<!-- keywords: sqlite3_stmt_scanstatus -->
|
|
<div class=nosearch>
|
|
<a href="intro.html"><h2>SQLite C Interface</h2></a>
|
|
<h2>Prepared Statement Scan Status</h2>
|
|
</div>
|
|
<blockquote><pre>
|
|
int sqlite3_stmt_scanstatus(
|
|
sqlite3_stmt *pStmt, /* Prepared statement for which info desired */
|
|
int idx, /* Index of loop to report on */
|
|
int iScanStatusOp, /* Information desired. SQLITE_SCANSTAT_* */
|
|
void *pOut /* Result written here */
|
|
);
|
|
</pre></blockquote>
|
|
<p>
|
|
This interface returns information about the predicted and measured
|
|
performance for pStmt. Advanced applications can use this
|
|
interface to compare the predicted and the measured performance and
|
|
issue warnings and/or rerun <a href="../lang_analyze.html">ANALYZE</a> if discrepancies are found.</p>
|
|
|
|
<p>Since this interface is expected to be rarely used, it is only
|
|
available if SQLite is compiled using the <a href="../compile.html#enable_stmt_scanstatus">SQLITE_ENABLE_STMT_SCANSTATUS</a>
|
|
compile-time option.</p>
|
|
|
|
<p>The "iScanStatusOp" parameter determines which status information to return.
|
|
The "iScanStatusOp" must be one of the <a href="../c3ref/c_scanstat_est.html">scanstatus options</a> or the behavior
|
|
of this interface is undefined.
|
|
The requested measurement is written into a variable pointed to by
|
|
the "pOut" parameter.
|
|
Parameter "idx" identifies the specific loop to retrieve statistics for.
|
|
Loops are numbered starting from zero. If idx is out of range - less than
|
|
zero or greater than or equal to the total number of loops used to implement
|
|
the statement - a non-zero value is returned and the variable that pOut
|
|
points to is unchanged.</p>
|
|
|
|
<p>Statistics might not be available for all loops in all statements. In cases
|
|
where there exist loops with no available statistics, this function behaves
|
|
as if the loop did not exist - it returns non-zero and leave the variable
|
|
that pOut points to unchanged.</p>
|
|
|
|
<p>See also: <a href="../c3ref/stmt_scanstatus_reset.html">sqlite3_stmt_scanstatus_reset()</a>
|
|
</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>
|