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<a href="intro.html"><h2>SQLite C Interface</h2></a><h2>Error Codes And Messages</h2><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);
</pre></blockquote><p>
The sqlite3_errcode() interface returns the numeric <a href="../rescode.html">result code</a> or
<a href="../rescode.html#extrc">extended result code</a> for the most recent failed sqlite3_* API call
associated with a <a href="../c3ref/sqlite3.html">database connection</a>. If a prior API call failed
but the most recent API call succeeded, the return value from
sqlite3_errcode() is undefined. 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 sqlite3_errmsg() and sqlite3_errmsg16() return English-language
text that describes the error, as either UTF-8 or UTF-16 respectively.
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() interface returns the English-language text
that describes the <a href="../rescode.html">result code</a>, as UTF-8.
Memory to hold the error message string is managed internally
and must not be freed by the application.</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="objlist.html">Objects</a>,
<a href="constlist.html">Constants</a>, and
<a href="funclist.html">Functions</a>.</p>
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