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+<!-- keywords: sqlite3_snapshot_recover -->
+<div class=nosearch>
+<a href="intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Recover snapshots from a wal file</h2>
+</div>
+<blockquote><pre>
+int sqlite3_snapshot_recover(sqlite3 *db, const char *zDb);
+</pre></blockquote>
+<p>
+If a <a href="../wal.html#walfile">WAL file</a> remains on disk after all database connections close
+(either through the use of the <a href="../c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpersistwal">SQLITE_FCNTL_PERSIST_WAL</a> <a href="../c3ref/file_control.html">file control</a>
+or because the last process to have the database opened exited without
+calling <a href="../c3ref/close.html">sqlite3_close()</a>) and a new connection is subsequently opened
+on that database and <a href="../wal.html#walfile">WAL file</a>, the <a href="../c3ref/snapshot_open.html">sqlite3_snapshot_open()</a> interface
+will only be able to open the last transaction added to the WAL file
+even though the WAL file contains other valid transactions.</p>
+
+<p>This function attempts to scan the WAL file associated with database zDb
+of database handle db and make all valid snapshots available to
+sqlite3_snapshot_open(). It is an error if there is already a read
+transaction open on the database, or if the database is not a WAL mode
+database.</p>
+
+<p>SQLITE_OK is returned if successful, or an SQLite error code otherwise.</p>
+
+<p>This interface is only available if SQLite is compiled with the
+<a href="../compile.html#enable_snapshot">SQLITE_ENABLE_SNAPSHOT</a> option.
+</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>
+