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+<title>Error Codes And Messages</title>
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+<!-- keywords: sqlite3_errcode sqlite3_errmsg sqlite3_errmsg16 sqlite3_error_offset sqlite3_errstr sqlite3_extended_errcode -->
+<div class=nosearch>
+<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Error Codes And Messages</h2>
+</div>
+<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);
+int sqlite3_error_offset(sqlite3 *db);
+</pre></blockquote>
+<p>
+If the most recent sqlite3_* API call associated with
+<a href="../c3ref/sqlite3.html">database connection</a> D failed, then the sqlite3_errcode(D) interface
+returns the numeric <a href="../rescode.html">result code</a> or <a href="../rescode.html#extrc">extended result code</a> for that
+API call.
+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 values returned by sqlite3_errcode() and/or
+sqlite3_extended_errcode() might change with each API call.
+Except, there are some interfaces that are guaranteed to never
+change the value of the error code.  The error-code preserving
+interfaces include the following:</p>
+
+<p><ul>
+<li> sqlite3_errcode()
+<li> sqlite3_extended_errcode()
+<li> sqlite3_errmsg()
+<li> sqlite3_errmsg16()
+<li> sqlite3_error_offset()
+</ul></p>
+
+<p>The sqlite3_errmsg() and sqlite3_errmsg16() return English-language
+text that describes the error, as either UTF-8 or UTF-16 respectively,
+or NULL if no error message is available.
+(See how SQLite handles <a href="../invalidutf.html">invalid UTF</a> for exceptions to this rule.)
+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(E) interface returns the English-language text
+that describes the <a href="../rescode.html">result code</a> E, as UTF-8, or NULL if E is not an
+result code for which a text error message is available.
+Memory to hold the error message string is managed internally
+and must not be freed by the application.</p>
+
+<p>If the most recent error references a specific token in the input
+SQL, the sqlite3_error_offset() interface returns the byte offset
+of the start of that token.  The byte offset returned by
+sqlite3_error_offset() assumes that the input SQL is UTF8.
+If the most recent error does not reference a specific token in the input
+SQL, then the sqlite3_error_offset() function returns -1.</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="../c3ref/objlist.html">Objects</a>,
+  <a href="../c3ref/constlist.html">Constants</a>, and
+  <a href="../c3ref/funclist.html">Functions</a>.</p>
+