Index: third_party/sqlite_google/src/btree.c
===================================================================
--- third_party/sqlite_google/src/btree.c	(revision 1639)
+++ third_party/sqlite_google/src/btree.c	(working copy)
@@ -29,6 +29,12 @@
 */
 static const char zPoisonHeader[] = "SQLite poison 3";
 
+/*
+** The user cookie position in the database meta information
+** (see prepare.c#215), incremented by one, because first position is actually
+** the number of free pages in Btree (see vdbe.c#2521)
+*/
+static const int kUserCookie = 6;
 
 /*
 ** Set this global variable to 1 to enable tracing using the TRACE
@@ -6422,3 +6428,41 @@
 }
 
 #endif
+
+int sqlite3_get_user_version(sqlite3 *sqlite, int *user_version) {
+  Btree *bt;
+
+  if( sqlite == NULL ) return SQLITE_ERROR;
+  if( sqlite->nDb<1 ) return SQLITE_ERROR;
+
+  /* grab actual (not temporary tables) database */
+  bt = sqlite->aDb[0].pBt;
+  /* because sqlite3BtreeGetMeta sets a table read lock, it is safe to use
+  ** without explicit read transaction. Besides, it is very unlikely we will
+  ** ever call this outside of a transaction.
+  */
+  return sqlite3BtreeGetMeta(bt, kUserCookie, (u32 *)user_version);
+}
+
+int sqlite3_set_user_version(sqlite3 *sqlite, int user_version) {
+  Btree *bt;
+  int rc;
+
+  if( sqlite == NULL ) return SQLITE_ERROR;
+  if( sqlite->nDb<1 ) return SQLITE_ERROR;
+
+  bt = sqlite->aDb[0].pBt;
+  if( bt->inTrans!= TRANS_WRITE ) {
+    return sqlite3BtreeUpdateMeta(bt, kUserCookie, (u32)user_version);
+  }else{
+    /* transacion isn't already in progress, have to enclose in
+    ** a write-transaction
+    */
+    rc = sqlite3BtreeBeginTrans(bt, 1);
+    if( rc!=SQLITE_OK ) return rc;
+    rc = sqlite3BtreeUpdateMeta(bt, kUserCookie, (u32)user_version);
+    if( rc==SQLITE_OK ) return sqlite3BtreeCommit(bt);
+    sqlite3BtreeRollback(bt);
+    return rc;
+  }
+}