? sites/default/files
? sites/default/settings.php
Index: includes/session.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/session.inc,v
retrieving revision 1.53
diff -u -p -r1.53 session.inc
--- includes/session.inc	31 Aug 2008 12:50:45 -0000	1.53
+++ includes/session.inc	1 Sep 2008 07:15:50 -0000
@@ -29,7 +29,7 @@ function sess_read($key) {
   }
 
   // Otherwise, if the session is still active, we have a record of the client's session in the database.
-  $user = db_fetch_object(db_query("SELECT u.*, s.* FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE s.sid = '%s'", $key));
+  $user = db_fetch_object(db_query("SELECT u.*, s.* FROM [{users}] u INNER JOIN [{sessions}] s ON u.[uid] = s.[uid] WHERE s.[sid] = '%s'", $key));
 
   // We found the client's session record and they are an authenticated user
   if ($user && $user->uid > 0) {
@@ -39,7 +39,7 @@ function sess_read($key) {
     // Add roles element to $user
     $user->roles = array();
     $user->roles[DRUPAL_AUTHENTICATED_RID] = 'authenticated user';
-    $result = db_query("SELECT r.rid, r.name FROM {role} r INNER JOIN {users_roles} ur ON ur.rid = r.rid WHERE ur.uid = %d", $user->uid);
+    $result = db_query("SELECT r.[rid], r.[name] FROM [{role}] r INNER JOIN [{users_roles}] ur ON ur.[rid] = r.[rid] WHERE ur.[uid] = %d", $user->uid);
     while ($role = db_fetch_object($result)) {
       $user->roles[$role->rid] = $role->name;
     }
@@ -65,7 +65,7 @@ function sess_write($key, $value) {
     return TRUE;
   }
 
-  $result = db_result(db_query("SELECT COUNT(*) FROM {sessions} WHERE sid = '%s'", $key));
+  $result = db_result(db_query("SELECT COUNT(*) FROM [{sessions}] WHERE [sid] = '%s'", $key));
 
   if (!$result) {
     // Only save session data when when the browser sends a cookie. This keeps
@@ -73,17 +73,17 @@ function sess_write($key, $value) {
     // and gives more useful statistics. We can't eliminate anonymous session
     // table rows without breaking "Who's Online" block.
     if ($user->uid || $value || count($_COOKIE)) {
-      db_query("INSERT INTO {sessions} (sid, uid, cache, hostname, session, timestamp) VALUES ('%s', %d, %d, '%s', '%s', %d)", $key, $user->uid, isset($user->cache) ? $user->cache : 0, ip_address(), $value, time());
+      db_query("INSERT INTO [{sessions}] ([sid], [uid], [cache], [hostname], [session], [timestamp]) VALUES ('%s', %d, %d, '%s', '%s', %d)", $key, $user->uid, isset($user->cache) ? $user->cache : 0, ip_address(), $value, time());
     }
   }
   else {
-    db_query("UPDATE {sessions} SET uid = %d, cache = %d, hostname = '%s', session = '%s', timestamp = %d WHERE sid = '%s'", $user->uid, isset($user->cache) ? $user->cache : 0, ip_address(), $value, time(), $key);
+    db_query("UPDATE [{sessions}] SET [uid] = %d, [cache] = %d, [hostname] = '%s', [session] = '%s', [timestamp] = %d WHERE [sid] = '%s'", $user->uid, isset($user->cache) ? $user->cache : 0, ip_address(), $value, time(), $key);
 
     if (db_affected_rows()) {
       // Last access time is updated no more frequently than once every 180 seconds.
       // This reduces contention in the users table.
       if ($user->uid && time() - $user->access > variable_get('session_write_interval', 180)) {
-        db_query("UPDATE {users} SET access = %d WHERE uid = %d", time(), $user->uid);
+        db_query("UPDATE [{users}] SET [access] = %d WHERE [uid] = %d", time(), $user->uid);
       }
     }
   }
@@ -97,7 +97,7 @@ function sess_write($key, $value) {
 function sess_regenerate() {
   $old_session_id = session_id();
   session_regenerate_id();
-  db_query("UPDATE {sessions} SET sid = '%s' WHERE sid = '%s'", session_id(), $old_session_id);
+  db_query("UPDATE [{sessions}] SET [sid] = '%s' WHERE [sid] = '%s'", session_id(), $old_session_id);
 }
 
 /**
@@ -113,8 +113,8 @@ function sess_regenerate() {
  *   The number of users with sessions.
  */
 function sess_count($timestamp = 0, $anonymous = true) {
-  $query = $anonymous ? ' AND uid = 0' : ' AND uid > 0';
-  return db_result(db_query('SELECT COUNT(sid) AS count FROM {sessions} WHERE timestamp >= %d' . $query, $timestamp));
+  $query = $anonymous ? ' AND [uid] = 0' : ' AND [uid] > 0';
+  return db_result(db_query('SELECT COUNT([sid]) AS [count] FROM [{sessions}] WHERE [timestamp] >= %d' . $query, $timestamp));
 }
 
 /**
@@ -124,7 +124,7 @@ function sess_count($timestamp = 0, $ano
  *   the session id
  */
 function sess_destroy_sid($sid) {
-  db_query("DELETE FROM {sessions} WHERE sid = '%s'", $sid);
+  db_query("DELETE FROM [{sessions}] WHERE [sid] = '%s'", $sid);
 }
 
 /**
@@ -134,7 +134,7 @@ function sess_destroy_sid($sid) {
  *   the user id
  */
 function sess_destroy_uid($uid) {
-  db_query('DELETE FROM {sessions} WHERE uid = %d', $uid);
+  db_query('DELETE FROM [{sessions}] WHERE [uid] = %d', $uid);
 }
 
 function sess_gc($lifetime) {
@@ -143,7 +143,7 @@ function sess_gc($lifetime) {
   // for three weeks before deleting them, you need to set gc_maxlifetime
   // to '1814400'. At that value, only after a user doesn't log in after
   // three weeks (1814400 seconds) will his/her session be removed.
-  db_query("DELETE FROM {sessions} WHERE timestamp < %d", time() - $lifetime);
+  db_query("DELETE FROM [{sessions}] WHERE [timestamp] < %d", time() - $lifetime);
 
   return TRUE;
 }
Index: includes/database/database.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database/database.inc,v
retrieving revision 1.2
diff -u -p -r1.2 database.inc
--- includes/database/database.inc	31 Aug 2008 09:12:35 -0000	1.2
+++ includes/database/database.inc	1 Sep 2008 07:15:51 -0000
@@ -146,6 +146,11 @@ abstract class DatabaseConnection extend
    */
   public $lastStatement;
 
+  /**
+   * String to use to quote identifiers and names.
+   */
+  protected $nameQuote = '"';
+
   function __construct($dsn, $username, $password, $driver_options = array()) {
     $driver_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION; // Because the other methods don't seem to work right.
     parent::__construct($dsn, $username, $password, $driver_options);
@@ -226,28 +231,59 @@ abstract class DatabaseConnection extend
    */
   protected function prefixTables($sql) {
     global $db_prefix;
+    static $_db_prefix = NULL;
 
-    if (is_array($db_prefix)) {
-      if (array_key_exists('default', $db_prefix)) {
-        $tmp = $db_prefix;
+    // #302327: Exceptional case if "." exists in $db_prefix.
+    // NOTE: preg_replace() can function with both string and array.
+    if (!$_db_prefix) {
+      $_db_prefix = preg_replace('/\./', '].[', $db_prefix);
+    }
+
+    if (is_array($_db_prefix)) {
+      if (array_key_exists('default', $_db_prefix)) {
+        $tmp = $_db_prefix;
         unset($tmp['default']);
         foreach ($tmp as $key => $val) {
           $sql = strtr($sql, array('{' . $key . '}' => $val . $key));
         }
-        return strtr($sql, array('{' => $db_prefix['default'] , '}' => ''));
+        return strtr($sql, array('{' => $_db_prefix['default'] , '}' => ''));
       }
       else {
-        foreach ($db_prefix as $key => $val) {
+        foreach ($_db_prefix as $key => $val) {
           $sql = strtr($sql, array('{' . $key . '}' => $val . $key));
         }
         return strtr($sql, array('{' => '' , '}' => ''));
       }
     }
     else {
-      return strtr($sql, array('{' => $db_prefix , '}' => ''));
+      return strtr($sql, array('{' => $_db_prefix , '}' => ''));
     }
   }
 
+ /**
+   * Escape all constraints in a query for reserved word conflict safe.
+   *
+   * Queries sent to Drupal should wrap all identifiers and names in square
+   * brackets. This function will search for this syntax and replace it as
+   * corresponding escape characters, based on the database engine specific
+   * requirement.
+   *
+   * @param $sql
+   *   A string containing a partial or entire SQL query.
+   * @return
+   *   The properly-escaped string.
+   */
+  protected function escapeConstraints($sql) {
+    // #302327: Exceptional case if "." exists in $db_prefix.
+    // TODO: Queries may come with "].[" syntax which need special concern.
+    //       Replace as below when all core queries are well escaped.
+    // @code
+    // return strtr($sql, array('[' => $this->nameQuote , ']' => $this->nameQuote));
+    // @endcode
+    $sql = preg_replace('/\[([A-Za-z0-9_]+)\]/', $this->nameQuote .'\1'. $this->nameQuote, $sql);
+    return strtr($sql, array('[' => '' , ']' => ''));
+  }
+
   /**
    * Prepare a query string and return the prepared statement.
    * 
@@ -263,6 +299,7 @@ abstract class DatabaseConnection extend
   protected function prepareQuery($query) {
     static $statements = array();
     $query = self::prefixTables($query);
+    $query = self::escapeConstraints($query);
     if (empty($statements[$query])) {
       $statements[$query] = parent::prepare($query);
     }
Index: includes/database/mysql/database.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database/mysql/database.inc,v
retrieving revision 1.1
diff -u -p -r1.1 database.inc
--- includes/database/mysql/database.inc	21 Aug 2008 19:36:36 -0000	1.1
+++ includes/database/mysql/database.inc	1 Sep 2008 07:15:51 -0000
@@ -14,6 +14,7 @@
 class DatabaseConnection_mysql extends DatabaseConnection {
 
   protected $transactionSupport;
+  protected $nameQuote = '`';
 
   public function __construct(Array $connection_options = array()) {