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