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+<!-- keywords: sqlite3_snapshot_get -->
+<div class=nosearch>
+<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Record A Database Snapshot</h2>
+</div>
+<blockquote><pre>
+int sqlite3_snapshot_get(
+  sqlite3 *db,
+  const char *zSchema,
+  sqlite3_snapshot **ppSnapshot
+);
+</pre></blockquote>
+<p>
+The <a href="../c3ref/snapshot_get.html">sqlite3_snapshot_get(D,S,P)</a> interface attempts to make a
+new <a href="../c3ref/snapshot.html">sqlite3_snapshot</a> object that records the current state of
+schema S in database connection D.  On success, the
+<a href="../c3ref/snapshot_get.html">sqlite3_snapshot_get(D,S,P)</a> interface writes a pointer to the newly
+created <a href="../c3ref/snapshot.html">sqlite3_snapshot</a> object into *P and returns SQLITE_OK.
+If there is not already a read-transaction open on schema S when
+this function is called, one is opened automatically.</p>
+
+<p>The following must be true for this function to succeed. If any of
+the following statements are false when sqlite3_snapshot_get() is
+called, SQLITE_ERROR is returned. The final value of *P is undefined
+in this case.</p>
+
+<p><ul>
+<li> The database handle must not be in <a href="../c3ref/get_autocommit.html">autocommit mode</a>.</p>
+
+<p><li> Schema S of <a href="../c3ref/sqlite3.html">database connection</a> D must be a <a href="../wal.html">WAL mode</a> database.</p>
+
+<p><li> There must not be a write transaction open on schema S of database
+connection D.</p>
+
+<p><li> One or more transactions must have been written to the current wal
+file since it was created on disk (by any connection). This means
+that a snapshot cannot be taken on a wal mode database with no wal
+file immediately after it is first opened. At least one transaction
+must be written to it first.
+</ul></p>
+
+<p>This function may also return SQLITE_NOMEM.  If it is called with the
+database handle in autocommit mode but fails for some other reason,
+whether or not a read transaction is opened on schema S is undefined.</p>
+
+<p>The <a href="../c3ref/snapshot.html">sqlite3_snapshot</a> object returned from a successful call to
+<a href="../c3ref/snapshot_get.html">sqlite3_snapshot_get()</a> must be freed using <a href="../c3ref/snapshot_free.html">sqlite3_snapshot_free()</a>
+to avoid a memory leak.</p>
+
+<p>The <a href="../c3ref/snapshot_get.html">sqlite3_snapshot_get()</a> interface is only available when the
+<a href="../compile.html#enable_snapshot">SQLITE_ENABLE_SNAPSHOT</a> compile-time option is used.
+</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>
+