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<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
<h2>Configuring The SQLite Library</h2>
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<blockquote><pre>
int sqlite3_config(int, ...);
</pre></blockquote>
<p>
The sqlite3_config() interface is used to make global configuration
changes to SQLite in order to tune SQLite to the specific needs of
the application. The default configuration is recommended for most
applications and so this routine is usually not necessary. It is
provided to support rare applications with unusual needs.</p>
<p><b>The sqlite3_config() interface is not threadsafe. The application
must ensure that no other SQLite interfaces are invoked by other
threads while sqlite3_config() is running.</b></p>
<p>The first argument to sqlite3_config() is an integer
<a href="../c3ref/c_config_covering_index_scan.html">configuration option</a> that determines
what property of SQLite is to be configured. Subsequent arguments
vary depending on the <a href="../c3ref/c_config_covering_index_scan.html">configuration option</a>
in the first argument.</p>
<p>For most configuration options, the sqlite3_config() interface
may only be invoked prior to library initialization using
<a href="../c3ref/initialize.html">sqlite3_initialize()</a> or after shutdown by <a href="../c3ref/initialize.html">sqlite3_shutdown()</a>.
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are called "anytime configuration options".
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<a href="../c3ref/initialize.html">sqlite3_shutdown()</a> with a first argument that is not an anytime
configuration option, then the sqlite3_config() call will return SQLITE_MISUSE.
Note, however, that sqlite3_config() can be called as part of the
implementation of an application-defined <a href="../c3ref/initialize.html">sqlite3_os_init()</a>.</p>
<p>When a configuration option is set, sqlite3_config() returns <a href="../rescode.html#ok">SQLITE_OK</a>.
If the option is unknown or SQLite is unable to set the option
then this routine returns a non-zero <a href="../rescode.html">error code</a>.
</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>
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