124 lines
4.4 KiB
HTML
124 lines
4.4 KiB
HTML
<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="../sqlite.css" rel="stylesheet">
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<title>Error Logging Interface</title>
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<!-- path=../ -->
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</head>
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<body>
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<div class=nosearch>
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<a href="../index.html">
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<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
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</a>
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<div><!-- IE hack to prevent disappearing logo --></div>
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<div class="tagline desktoponly">
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<div class="menu mainmenu">
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<ul>
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<li><a href="../index.html">Home</a>
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<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
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<ul>
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<li><a href='../about.html'>About</a>
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<li><a href='../docs.html'>Documentation</a>
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<li><a href='../download.html'>Download</a>
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<li><a href='../support.html'>Support</a>
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<li><a href='../prosupport.html'>Purchase</a>
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<div class="searchmenu" id="searchmenu">
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<form method="GET" action="../search">
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<select name="s" id="searchtype">
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<script>
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var w = document.getElementById(nm);
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var w = document.getElementById("searchmenu");
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setTimeout(function(){
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document.getElementById("searchbox").focus()
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}, 30);
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}
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}
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function div_off(nm){document.getElementById(nm).style.display="none";}
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window.onbeforeunload = function(e){div_off("submenu");}
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document.getElementById("search_menubutton").style.display = "none";
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}
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/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
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</script>
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</div>
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<!-- keywords: sqlite3_log -->
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<div class=nosearch>
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<a href="intro.html"><h2>SQLite C Interface</h2></a>
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<h2>Error Logging Interface</h2>
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</div>
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<blockquote><pre>
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void sqlite3_log(int iErrCode, const char *zFormat, ...);
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</pre></blockquote>
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<p>
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The <a href="../c3ref/log.html">sqlite3_log()</a> interface writes a message into the <a href="../errlog.html">error log</a>
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established by the <a href="../c3ref/c_config_covering_index_scan.html#sqliteconfiglog">SQLITE_CONFIG_LOG</a> option to <a href="../c3ref/config.html">sqlite3_config()</a>.
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If logging is enabled, the zFormat string and subsequent arguments are
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used with <a href="../c3ref/mprintf.html">sqlite3_snprintf()</a> to generate the final output string.</p>
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<p>The sqlite3_log() interface is intended for use by extensions such as
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virtual tables, collating functions, and SQL functions. While there is
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nothing to prevent an application from calling sqlite3_log(), doing so
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is considered bad form.</p>
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<p>The zFormat string must not be NULL.</p>
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<p>To avoid deadlocks and other threading problems, the sqlite3_log() routine
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will not use dynamically allocated memory. The log message is stored in
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a fixed-length buffer on the stack. If the log message is longer than
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a few hundred characters, it will be truncated to the length of the
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buffer.
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</p><p>See also lists of
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<a href="objlist.html">Objects</a>,
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<a href="constlist.html">Constants</a>, and
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<a href="funclist.html">Functions</a>.</p>
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