170 lines
6.9 KiB
HTML
170 lines
6.9 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>One-Step Query Execution Interface</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_exec -->
|
|
<div class=nosearch>
|
|
<a href="intro.html"><h2>SQLite C Interface</h2></a>
|
|
<h2>One-Step Query Execution Interface</h2>
|
|
</div>
|
|
<blockquote><pre>
|
|
int sqlite3_exec(
|
|
sqlite3*, /* An open database */
|
|
const char *sql, /* SQL to be evaluated */
|
|
int (*callback)(void*,int,char**,char**), /* Callback function */
|
|
void *, /* 1st argument to callback */
|
|
char **errmsg /* Error msg written here */
|
|
);
|
|
</pre></blockquote>
|
|
<p>
|
|
The sqlite3_exec() interface is a convenience wrapper around
|
|
<a href="../c3ref/prepare.html">sqlite3_prepare_v2()</a>, <a href="../c3ref/step.html">sqlite3_step()</a>, and <a href="../c3ref/finalize.html">sqlite3_finalize()</a>,
|
|
that allows an application to run multiple statements of SQL
|
|
without having to use a lot of C code.</p>
|
|
|
|
<p>The sqlite3_exec() interface runs zero or more UTF-8 encoded,
|
|
semicolon-separate SQL statements passed into its 2nd argument,
|
|
in the context of the <a href="../c3ref/sqlite3.html">database connection</a> passed in as its 1st
|
|
argument. If the callback function of the 3rd argument to
|
|
sqlite3_exec() is not NULL, then it is invoked for each result row
|
|
coming out of the evaluated SQL statements. The 4th argument to
|
|
sqlite3_exec() is relayed through to the 1st argument of each
|
|
callback invocation. If the callback pointer to sqlite3_exec()
|
|
is NULL, then no callback is ever invoked and result rows are
|
|
ignored.</p>
|
|
|
|
<p>If an error occurs while evaluating the SQL statements passed into
|
|
sqlite3_exec(), then execution of the current statement stops and
|
|
subsequent statements are skipped. If the 5th parameter to sqlite3_exec()
|
|
is not NULL then any error message is written into memory obtained
|
|
from <a href="../c3ref/free.html">sqlite3_malloc()</a> and passed back through the 5th parameter.
|
|
To avoid memory leaks, the application should invoke <a href="../c3ref/free.html">sqlite3_free()</a>
|
|
on error message strings returned through the 5th parameter of
|
|
sqlite3_exec() after the error message string is no longer needed.
|
|
If the 5th parameter to sqlite3_exec() is not NULL and no errors
|
|
occur, then sqlite3_exec() sets the pointer in its 5th parameter to
|
|
NULL before returning.</p>
|
|
|
|
<p>If an sqlite3_exec() callback returns non-zero, the sqlite3_exec()
|
|
routine returns SQLITE_ABORT without invoking the callback again and
|
|
without running any subsequent SQL statements.</p>
|
|
|
|
<p>The 2nd argument to the sqlite3_exec() callback function is the
|
|
number of columns in the result. The 3rd argument to the sqlite3_exec()
|
|
callback is an array of pointers to strings obtained as if from
|
|
<a href="../c3ref/column_blob.html">sqlite3_column_text()</a>, one for each column. If an element of a
|
|
result row is NULL then the corresponding string pointer for the
|
|
sqlite3_exec() callback is a NULL pointer. The 4th argument to the
|
|
sqlite3_exec() callback is an array of pointers to strings where each
|
|
entry represents the name of corresponding result column as obtained
|
|
from <a href="../c3ref/column_name.html">sqlite3_column_name()</a>.</p>
|
|
|
|
<p>If the 2nd parameter to sqlite3_exec() is a NULL pointer, a pointer
|
|
to an empty string, or a pointer that contains only whitespace and/or
|
|
SQL comments, then no SQL statements are evaluated and the database
|
|
is not changed.</p>
|
|
|
|
<p>Restrictions:</p>
|
|
|
|
<p><ul>
|
|
<li> The application must ensure that the 1st parameter to sqlite3_exec()
|
|
is a valid and open <a href="../c3ref/sqlite3.html">database connection</a>.
|
|
<li> The application must not close the <a href="../c3ref/sqlite3.html">database connection</a> specified by
|
|
the 1st parameter to sqlite3_exec() while sqlite3_exec() is running.
|
|
<li> The application must not modify the SQL statement text passed into
|
|
the 2nd parameter of sqlite3_exec() while sqlite3_exec() is running.
|
|
</ul>
|
|
</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>
|