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<!-- keywords: SQLITE_PREPARE_NORMALIZE SQLITE_PREPARE_NO_VTAB SQLITE_PREPARE_PERSISTENT -->
<div class=nosearch>
<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
<h2>Prepare Flags</h2>
</div>
<blockquote><pre>
#define SQLITE_PREPARE_PERSISTENT 0x01
#define SQLITE_PREPARE_NORMALIZE 0x02
#define SQLITE_PREPARE_NO_VTAB 0x04
</pre></blockquote>
<p>
These constants define various flags that can be passed into
"prepFlags" parameter of the <a href="../c3ref/prepare.html">sqlite3_prepare_v3()</a> and
<a href="../c3ref/prepare.html">sqlite3_prepare16_v3()</a> interfaces.</p>
<p>New flags may be added in future releases of SQLite.</p>
<p><dl>
<a name="sqlitepreparepersistent"></a>
<dt>SQLITE_PREPARE_PERSISTENT</dt>
<dd>The SQLITE_PREPARE_PERSISTENT flag is a hint to the query planner
that the prepared statement will be retained for a long time and
probably reused many times. Without this flag, <a href="../c3ref/prepare.html">sqlite3_prepare_v3()</a>
and <a href="../c3ref/prepare.html">sqlite3_prepare16_v3()</a> assume that the prepared statement will
be used just once or at most a few times and then destroyed using
<a href="../c3ref/finalize.html">sqlite3_finalize()</a> relatively soon. The current implementation acts
on this hint by avoiding the use of <a href="../malloc.html#lookaside">lookaside memory</a> so as not to
deplete the limited store of lookaside memory. Future versions of
SQLite may act on this hint differently.</p>
<p><a name="sqlitepreparenormalize"></a>
<dt>SQLITE_PREPARE_NORMALIZE</dt>
<dd>The SQLITE_PREPARE_NORMALIZE flag is a no-op. This flag used
to be required for any prepared statement that wanted to use the
<a href="../c3ref/expanded_sql.html">sqlite3_normalized_sql()</a> interface. However, the
<a href="../c3ref/expanded_sql.html">sqlite3_normalized_sql()</a> interface is now available to all
prepared statements, regardless of whether or not they use this
flag.</p>
<p><a name="sqlitepreparenovtab"></a>
<dt>SQLITE_PREPARE_NO_VTAB</dt>
<dd>The SQLITE_PREPARE_NO_VTAB flag causes the SQL compiler
to return an error (error code SQLITE_ERROR) if the statement uses
any virtual tables.
</dl>
</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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