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<a href="intro.html"><h2>SQLite C Interface</h2></a>
<h2>Error Logging Interface</h2>
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<blockquote><pre>
void sqlite3_log(int iErrCode, const char *zFormat, ...);
</pre></blockquote>
<p>
The <a href="../c3ref/log.html">sqlite3_log()</a> interface writes a message into the <a href="../errlog.html">error log</a>
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>.
If logging is enabled, the zFormat string and subsequent arguments are
used with <a href="../c3ref/mprintf.html">sqlite3_snprintf()</a> to generate the final output string.</p>
<p>The sqlite3_log() interface is intended for use by extensions such as
virtual tables, collating functions, and SQL functions. While there is
nothing to prevent an application from calling sqlite3_log(), doing so
is considered bad form.</p>
<p>The zFormat string must not be NULL.</p>
<p>To avoid deadlocks and other threading problems, the sqlite3_log() routine
will not use dynamically allocated memory. The log message is stored in
a fixed-length buffer on the stack. If the log message is longer than
a few hundred characters, it will be truncated to the length of the
buffer.
</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>
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